Merge remote-tracking branch 'origin/development' into linked-identities

Conflicts:
	OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java
	OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptTextFragment.java
	OpenKeychain/src/main/res/menu/decrypt_menu.xml

27 files changed, 802 insertions, 183 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/HkpKeyserver.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/HkpKeyserver.java
index 480319081..cb8a53e25 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/HkpKeyserver.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/keyimport/HkpKeyserver.java
@@ -242,7 +242,7 @@ public class HkpKeyserver extends Keyserver {
 
         String encodedQuery;
         try {
-            encodedQuery = URLEncoder.encode(query, "utf8");
+            encodedQuery = URLEncoder.encode(query, "UTF8");
         } catch (UnsupportedEncodingException e) {
             return null;
         }
@@ -286,7 +286,7 @@ public class HkpKeyserver extends Keyserver {
             entry.setAlgorithm(KeyFormattingUtils.getAlgorithmInfo(algorithmId, bitSize, null));
 
             // group 1 contains the full fingerprint (v4) or the long key id if available
-            // see http://bit.ly/1d4bxbk and http://bit.ly/1gD1wwr
+            // see https://bitbucket.org/skskeyserver/sks-keyserver/pull-request/12/fixes-for-machine-readable-indexes/diff
             String fingerprintOrKeyId = matcher.group(1).toLowerCase(Locale.ENGLISH);
             if (fingerprintOrKeyId.length() > 16) {
                 entry.setFingerprintHex(fingerprintOrKeyId);
@@ -312,14 +312,13 @@ public class HkpKeyserver extends Keyserver {
                 String tmp = uidMatcher.group(1).trim();
                 if (tmp.contains("%")) {
                     if (tmp.contains("%%")) {
-                        // This is a fix for issue #683
                         // The server encodes a percent sign as %%, so it is swapped out with its
                         // urlencoded counterpart to prevent errors
                         tmp = tmp.replace("%%", "%25");
                     }
                     try {
                         // converts Strings like "Universit%C3%A4t" to a proper encoding form "Universität".
-                        tmp = (URLDecoder.decode(tmp, "UTF8"));
+                        tmp = URLDecoder.decode(tmp, "UTF8");
                     } catch (UnsupportedEncodingException ignored) {
                         // will never happen, because "UTF8" is supported
                     }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateKeyYubiImportFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateKeyYubiImportFragment.java
index 1cd0aaf2f..db62d53c5 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateKeyYubiImportFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateKeyYubiImportFragment.java
@@ -123,7 +123,8 @@ public class CreateKeyYubiImportFragment extends Fragment implements NfcListener
             });
         }
 
-        mListFragment = ImportKeysListFragment.newInstance(null, null, "0x" + mNfcFingerprint, true);
+        mListFragment = ImportKeysListFragment.newInstance(null, null,
+                "0x" + mNfcFingerprint, true, null);
 
         view.findViewById(R.id.button_search).setOnClickListener(new OnClickListener() {
             @Override
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java
index d641f02f9..651b56ab0 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java
@@ -79,17 +79,18 @@ public abstract class DecryptFragment extends CryptoOperationFragment implements
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        mResultLayout = (LinearLayout) view.findViewById(R.id.result_main_layout);
+        // NOTE: These views are inside the activity!
+        mResultLayout = (LinearLayout) getActivity().findViewById(R.id.result_main_layout);
         mResultLayout.setVisibility(View.GONE);
 
-        mEncryptionIcon = (ImageView) view.findViewById(R.id.result_encryption_icon);
-        mEncryptionText = (TextView) view.findViewById(R.id.result_encryption_text);
-        mSignatureIcon = (ImageView) view.findViewById(R.id.result_signature_icon);
-        mSignatureText = (TextView) view.findViewById(R.id.result_signature_text);
-        mSignatureLayout = view.findViewById(R.id.result_signature_layout);
-        mSignatureName = (TextView) view.findViewById(R.id.result_signature_name);
-        mSignatureEmail = (TextView) view.findViewById(R.id.result_signature_email);
-        mSignatureAction = (TextView) view.findViewById(R.id.result_signature_action);
+        mEncryptionIcon = (ImageView) getActivity().findViewById(R.id.result_encryption_icon);
+        mEncryptionText = (TextView) getActivity().findViewById(R.id.result_encryption_text);
+        mSignatureIcon = (ImageView) getActivity().findViewById(R.id.result_signature_icon);
+        mSignatureText = (TextView) getActivity().findViewById(R.id.result_signature_text);
+        mSignatureLayout = getActivity().findViewById(R.id.result_signature_layout);
+        mSignatureName = (TextView) getActivity().findViewById(R.id.result_signature_name);
+        mSignatureEmail = (TextView) getActivity().findViewById(R.id.result_signature_email);
+        mSignatureAction = (TextView) getActivity().findViewById(R.id.result_signature_action);
 
     }
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptTextFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptTextFragment.java
index 1b9ae917f..6f576a112 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptTextFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptTextFragment.java
@@ -97,9 +97,9 @@ public class DecryptTextFragment extends DecryptFragment {
     /**
      * Create Intent Chooser but exclude decrypt activites
      */
-    private Intent sendWithChooserExcludingEncrypt(String text) {
+    private Intent sendWithChooserExcludingDecrypt(String text) {
         Intent prototype = createSendIntent(text);
-        String title = getString(R.string.title_share_file);
+        String title = getString(R.string.title_share_message);
 
         // we don't want to decrypt the decrypted, no inception ;)
         String[] blacklist = new String[]{
@@ -147,7 +147,7 @@ public class DecryptTextFragment extends DecryptFragment {
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
             case R.id.decrypt_share: {
-                startActivity(sendWithChooserExcludingEncrypt(mText.getText().toString()));
+                startActivity(sendWithChooserExcludingDecrypt(mText.getText().toString()));
                 break;
             }
             case R.id.decrypt_copy: {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java
index ccb4a6355..458810541 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java
@@ -202,7 +202,7 @@ public class EncryptFilesFragment extends CryptoOperationFragment {
         } catch (IOException e) {
             Notify.create(getActivity(),
                     getActivity().getString(R.string.error_file_added_already, FileHelper.getFilename(getActivity(), inputUri)),
-                    Notify.Style.ERROR).show();
+                    Notify.Style.ERROR).show(this);
             return;
         }
         mSelectedFiles.requestFocus();
@@ -230,7 +230,7 @@ public class EncryptFilesFragment extends CryptoOperationFragment {
     private void encryptClicked(boolean share) {
         if (mFilesModels.isEmpty()) {
             Notify.create(getActivity(), R.string.error_no_file_selected,
-                    Notify.Style.ERROR).show();
+                    Notify.Style.ERROR).show(this);
             return;
         }
         if (share) {
@@ -247,7 +247,7 @@ public class EncryptFilesFragment extends CryptoOperationFragment {
         } else {
             if (mFilesModels.size() > 1) {
                 Notify.create(getActivity(), R.string.error_multi_not_supported,
-                        Notify.Style.ERROR).show();
+                        Notify.Style.ERROR).show(this);
                 return;
             }
             showOutputFileDialog();
@@ -330,7 +330,7 @@ public class EncryptFilesFragment extends CryptoOperationFragment {
 
         if (mFilesModels.isEmpty()) {
             Notify.create(getActivity(), R.string.no_file_selected, Notify.Style.ERROR)
-                    .show();
+                    .show(this);
             return false;
         } else if (mFilesModels.size() > 1 && !mShareAfterEncrypt) {
             Log.e(Constants.TAG, "Aborting: mInputUris.size() > 1 && !mShareAfterEncrypt");
@@ -347,12 +347,12 @@ public class EncryptFilesFragment extends CryptoOperationFragment {
 
             if (mPassphrase == null) {
                 Notify.create(getActivity(), R.string.passphrases_do_not_match, Notify.Style.ERROR)
-                        .show();
+                        .show(this);
                 return false;
             }
             if (mPassphrase.isEmpty()) {
                 Notify.create(getActivity(), R.string.passphrase_must_not_be_empty, Notify.Style.ERROR)
-                        .show();
+                        .show(this);
                 return false;
             }
 
@@ -365,7 +365,7 @@ public class EncryptFilesFragment extends CryptoOperationFragment {
             // Files must be encrypted, only text can be signed-only right now
             if (!gotEncryptionKeys) {
                 Notify.create(getActivity(), R.string.select_encryption_key, Notify.Style.ERROR)
-                        .show();
+                        .show(this);
                 return false;
             }
         }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextActivity.java
index 03ab48e23..dd6dd6594 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextActivity.java
@@ -98,23 +98,20 @@ public class EncryptTextActivity extends BaseActivity implements
                     // handle like normal text encryption, override action and extras to later
                     // executeServiceMethod ACTION_ENCRYPT_TEXT in main actions
                     extras.putString(EXTRA_TEXT, sharedText);
-                    action = ACTION_ENCRYPT_TEXT;
                 }
 
             }
         }
 
         String textData = extras.getString(EXTRA_TEXT);
-        if (ACTION_ENCRYPT_TEXT.equals(action) && textData == null) {
-            Log.e(Constants.TAG, "Include the extra 'text' in your Intent!");
-            return;
+        if (textData == null) {
+            textData = "";
         }
 
         // preselect keys given by intent
         long mSigningKeyId = extras.getLong(EXTRA_SIGNATURE_KEY_ID);
         long[] mEncryptionKeyIds = extras.getLongArray(EXTRA_ENCRYPTION_KEY_IDS);
 
-
         if (savedInstanceState == null) {
             FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextFragment.java
index b37a2ca79..3f9147cc4 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptTextFragment.java
@@ -288,9 +288,9 @@ public class EncryptTextFragment extends CryptoOperationFragment {
     }
 
     protected boolean inputIsValid() {
-        if (mMessage == null) {
-            Notify.create(getActivity(), R.string.error_message, Notify.Style.ERROR)
-                    .show();
+        if (mMessage == null || mMessage.isEmpty()) {
+            Notify.create(getActivity(), R.string.error_empty_text, Notify.Style.ERROR)
+                    .show(this);
             return false;
         }
 
@@ -299,12 +299,12 @@ public class EncryptTextFragment extends CryptoOperationFragment {
 
             if (mSymmetricPassphrase == null) {
                 Notify.create(getActivity(), R.string.passphrases_do_not_match, Notify.Style.ERROR)
-                        .show();
+                        .show(this);
                 return false;
             }
             if (mSymmetricPassphrase.isEmpty()) {
                 Notify.create(getActivity(), R.string.passphrase_must_not_be_empty, Notify.Style.ERROR)
-                        .show();
+                        .show(this);
                 return false;
             }
 
@@ -316,7 +316,7 @@ public class EncryptTextFragment extends CryptoOperationFragment {
 
             if (!gotEncryptionKeys && mSigningKeyId == 0) {
                 Notify.create(getActivity(), R.string.select_encryption_or_signature_key, Notify.Style.ERROR)
-                        .show();
+                        .show(this);
                 return false;
             }
         }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java
index 7fe5be793..5d9950db6 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java
@@ -39,6 +39,7 @@ import org.sufficientlysecure.keychain.ui.base.BaseNfcActivity;
 import org.sufficientlysecure.keychain.service.CloudImportService;
 import org.sufficientlysecure.keychain.service.ServiceProgressHandler;
 import org.sufficientlysecure.keychain.ui.dialog.ProgressDialogFragment;
+import org.sufficientlysecure.keychain.ui.util.FormattingUtils;
 import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
 import org.sufficientlysecure.keychain.ui.util.Notify;
 import org.sufficientlysecure.keychain.util.Log;
@@ -62,6 +63,8 @@ public class ImportKeysActivity extends BaseNfcActivity {
     // Actions for internal use only:
     public static final String ACTION_IMPORT_KEY_FROM_FILE = Constants.INTENT_PREFIX
             + "IMPORT_KEY_FROM_FILE";
+    public static final String ACTION_SEARCH_KEYSERVER_FROM_URL = Constants.INTENT_PREFIX
+            + "SEARCH_KEYSERVER_FROM_URL";
     public static final String EXTRA_RESULT = "result";
 
     // only used by ACTION_IMPORT_KEY
@@ -112,15 +115,19 @@ public class ImportKeysActivity extends BaseNfcActivity {
         }
 
         if (action == null) {
-            startCloudFragment(savedInstanceState, null, false);
-            startListFragment(savedInstanceState, null, null, null);
+            startCloudFragment(savedInstanceState, null, false, null);
+            startListFragment(savedInstanceState, null, null, null, null);
             return;
         }
 
         if (Intent.ACTION_VIEW.equals(action)) {
-            // Android's Action when opening file associated to Keychain (see AndroidManifest.xml)
-            // delegate action to ACTION_IMPORT_KEY
-            action = ACTION_IMPORT_KEY;
+            if (scheme.equals("http") || scheme.equals("https")) {
+                action = ACTION_SEARCH_KEYSERVER_FROM_URL;
+            } else {
+                // Android's Action when opening file associated to Keychain (see AndroidManifest.xml)
+                // delegate action to ACTION_IMPORT_KEY
+                action = ACTION_IMPORT_KEY;
+            }
         }
 
         switch (action) {
@@ -130,12 +137,12 @@ public class ImportKeysActivity extends BaseNfcActivity {
 
                 if (dataUri != null) {
                     // action: directly load data
-                    startListFragment(savedInstanceState, null, dataUri, null);
+                    startListFragment(savedInstanceState, null, dataUri, null, null);
                 } else if (extras.containsKey(EXTRA_KEY_BYTES)) {
                     byte[] importData = extras.getByteArray(EXTRA_KEY_BYTES);
 
                     // action: directly load data
-                    startListFragment(savedInstanceState, importData, null, null);
+                    startListFragment(savedInstanceState, importData, null, null, null);
                 }
                 break;
             }
@@ -162,10 +169,10 @@ public class ImportKeysActivity extends BaseNfcActivity {
 
                     if (query != null && query.length() > 0) {
                         // display keyserver fragment with query
-                        startCloudFragment(savedInstanceState, query, false);
+                        startCloudFragment(savedInstanceState, query, false, null);
 
                         // action: search immediately
-                        startListFragment(savedInstanceState, null, null, query);
+                        startListFragment(savedInstanceState, null, null, query, null);
                     } else {
                         Log.e(Constants.TAG, "Query is empty!");
                         return;
@@ -181,10 +188,10 @@ public class ImportKeysActivity extends BaseNfcActivity {
                         String query = "0x" + fingerprint;
 
                         // display keyserver fragment with query
-                        startCloudFragment(savedInstanceState, query, true);
+                        startCloudFragment(savedInstanceState, query, true, null);
 
                         // action: search immediately
-                        startListFragment(savedInstanceState, null, null, query);
+                        startListFragment(savedInstanceState, null, null, query, null);
                     }
                 } else {
                     Log.e(Constants.TAG,
@@ -200,7 +207,29 @@ public class ImportKeysActivity extends BaseNfcActivity {
                 startFileFragment(savedInstanceState);
 
                 // no immediate actions!
-                startListFragment(savedInstanceState, null, null, null);
+                startListFragment(savedInstanceState, null, null, null, null);
+                break;
+            }
+            case ACTION_SEARCH_KEYSERVER_FROM_URL: {
+                // need to process URL to get search query and keyserver authority
+                String query = dataUri.getQueryParameter("search");
+                String keyserver = dataUri.getAuthority();
+                // if query not specified, we still allow users to search the keyserver in the link
+                if (query == null) {
+                    Notify.create(this, R.string.import_url_warn_no_search_parameter, Notify.LENGTH_INDEFINITE,
+                            Notify.Style.WARN).show(mTopFragment);
+                    // we just set the keyserver
+                    startCloudFragment(savedInstanceState, null, false, keyserver);
+                    // it's not necessary to set the keyserver for ImportKeysListFragment since
+                    // it'll be taken care of by ImportKeysCloudFragment when the user clicks
+                    // the search button
+                    startListFragment(savedInstanceState, null, null, null, null);
+                } else {
+                    // we allow our users to edit the query if they wish
+                    startCloudFragment(savedInstanceState, query, false, keyserver);
+                    // search immediately
+                    startListFragment(savedInstanceState, null, null, query, keyserver);
+                }
                 break;
             }
             case ACTION_IMPORT_KEY_FROM_FILE_AND_RETURN: {
@@ -208,18 +237,31 @@ public class ImportKeysActivity extends BaseNfcActivity {
                 startFileFragment(savedInstanceState);
 
                 // no immediate actions!
-                startListFragment(savedInstanceState, null, null, null);
+                startListFragment(savedInstanceState, null, null, null, null);
                 break;
             }
             default: {
-                startCloudFragment(savedInstanceState, null, false);
-                startListFragment(savedInstanceState, null, null, null);
+                startCloudFragment(savedInstanceState, null, false, null);
+                startListFragment(savedInstanceState, null, null, null, null);
                 break;
             }
         }
     }
 
-    private void startListFragment(Bundle savedInstanceState, byte[] bytes, Uri dataUri, String serverQuery) {
+
+    /**
+     * if the fragment is started with non-null bytes/dataUri/serverQuery, it will immediately
+     * load content
+     *
+     * @param savedInstanceState
+     * @param bytes              bytes containing list of keyrings to import
+     * @param dataUri            uri to file to import keyrings from
+     * @param serverQuery        query to search for on the keyserver
+     * @param keyserver          keyserver authority to search on. If null will use keyserver from
+     *                           user preferences
+     */
+    private void startListFragment(Bundle savedInstanceState, byte[] bytes, Uri dataUri,
+                                   String serverQuery, String keyserver) {
         // However, if we're being restored from a previous state,
         // then we don't need to do anything and should return or else
         // we could end up with overlapping fragments.
@@ -227,8 +269,8 @@ public class ImportKeysActivity extends BaseNfcActivity {
             return;
         }
 
-        // Create an instance of the fragment
-        mListFragment = ImportKeysListFragment.newInstance(bytes, dataUri, serverQuery);
+        mListFragment = ImportKeysListFragment.newInstance(bytes, dataUri, serverQuery, false,
+                keyserver);
 
         // Add the fragment to the 'fragment_container' FrameLayout
         // NOTE: We use commitAllowingStateLoss() to prevent weird crashes!
@@ -259,7 +301,18 @@ public class ImportKeysActivity extends BaseNfcActivity {
         getSupportFragmentManager().executePendingTransactions();
     }
 
-    private void startCloudFragment(Bundle savedInstanceState, String query, boolean disableQueryEdit) {
+    /**
+     * loads the CloudFragment, which consists of the search bar, search button and settings icon
+     * visually.
+     *
+     * @param savedInstanceState
+     * @param query              search query
+     * @param disableQueryEdit   if true, user will not be able to edit the search query
+     * @param keyserver          keyserver authority to use for search, if null will use keyserver
+     *                           specified in user preferences
+     */
+
+    private void startCloudFragment(Bundle savedInstanceState, String query, boolean disableQueryEdit, String keyserver) {
         // However, if we're being restored from a previous state,
         // then we don't need to do anything and should return or else
         // we could end up with overlapping fragments.
@@ -268,7 +321,7 @@ public class ImportKeysActivity extends BaseNfcActivity {
         }
 
         // Create an instance of the fragment
-        mTopFragment = ImportKeysCloudFragment.newInstance(query, disableQueryEdit);
+        mTopFragment = ImportKeysCloudFragment.newInstance(query, disableQueryEdit, keyserver);
 
         // Add the fragment to the 'fragment_container' FrameLayout
         // NOTE: We use commitAllowingStateLoss() to prevent weird crashes!
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysCloudFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysCloudFragment.java
index 91ca93c36..1cd5c24f3 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysCloudFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysCloudFragment.java
@@ -45,6 +45,7 @@ import java.util.List;
 public class ImportKeysCloudFragment extends Fragment {
     public static final String ARG_QUERY = "query";
     public static final String ARG_DISABLE_QUERY_EDIT = "disable_query_edit";
+    public static final String ARG_KEYSERVER = "keyserver";
 
     private ImportKeysActivity mImportActivity;
 
@@ -54,13 +55,20 @@ public class ImportKeysCloudFragment extends Fragment {
 
     /**
      * Creates new instance of this fragment
+     *
+     * @param query            query to search for
+     * @param disableQueryEdit if true, user cannot edit query
+     * @param keyserver        specified keyserver authority to use. If null, will use keyserver
+     *                         specified in user preferences
      */
-    public static ImportKeysCloudFragment newInstance(String query, boolean disableQueryEdit) {
+    public static ImportKeysCloudFragment newInstance(String query, boolean disableQueryEdit,
+                                                      String keyserver) {
         ImportKeysCloudFragment frag = new ImportKeysCloudFragment();
 
         Bundle args = new Bundle();
         args.putString(ARG_QUERY, query);
         args.putBoolean(ARG_DISABLE_QUERY_EDIT, disableQueryEdit);
+        args.putString(ARG_KEYSERVER, keyserver);
 
         frag.setArguments(args);
 
@@ -151,8 +159,17 @@ public class ImportKeysCloudFragment extends Fragment {
     }
 
     private void search(String query) {
-        Preferences prefs = Preferences.getPreferences(getActivity());
-        mImportActivity.loadCallback(new ImportKeysListFragment.CloudLoaderState(query, prefs.getCloudSearchPrefs()));
+        Preferences.CloudSearchPrefs cloudSearchPrefs;
+        String explicitKeyserver = getArguments().getString(ARG_KEYSERVER);
+        // no explicit keyserver passed
+        if (explicitKeyserver == null) {
+            cloudSearchPrefs = Preferences.getPreferences(getActivity()).getCloudSearchPrefs();
+        } else {
+            // assume we are also meant to search keybase.io
+            cloudSearchPrefs = new Preferences.CloudSearchPrefs(true, true, explicitKeyserver);
+        }
+        mImportActivity.loadCallback(
+                new ImportKeysListFragment.CloudLoaderState(query, cloudSearchPrefs));
         toggleKeyboard(false);
     }
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysListFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysListFragment.java
index b9fdbea5c..bf7e41045 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysListFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysListFragment.java
@@ -58,6 +58,7 @@ public class ImportKeysListFragment extends ListFragment implements
     private static final String ARG_BYTES = "bytes";
     public static final String ARG_SERVER_QUERY = "query";
     public static final String ARG_NON_INTERACTIVE = "non_interactive";
+    public static final String ARG_KEYSERVER_URL = "keyserver_url";
 
     private Activity mActivity;
     private ImportKeysAdapter mAdapter;
@@ -78,7 +79,8 @@ public class ImportKeysListFragment extends ListFragment implements
         return mAdapter.getData();
     }
 
-    /** Returns an Iterator (with size) of the selected data items.
+    /**
+     * Returns an Iterator (with size) of the selected data items.
      * This iterator is sort of a tradeoff, it's slightly more complex than an
      * ArrayList would have been, but we save some memory by just returning
      * relevant elements on demand.
@@ -121,12 +123,36 @@ public class ImportKeysListFragment extends ListFragment implements
 
     }
 
-    public static ImportKeysListFragment newInstance(byte[] bytes, Uri dataUri, String serverQuery) {
-        return newInstance(bytes, dataUri, serverQuery, false);
+    /**
+     * Creates an interactive ImportKeyListFragment which reads keyrings from bytes, or file specified
+     * by dataUri, or searches a keyserver for serverQuery, if parameter is not null, in that order
+     *
+     * @param bytes       byte data containing list of keyrings to be imported
+     * @param dataUri     file from which keyrings are to be imported
+     * @param serverQuery query to search for on keyserver
+     * @param keyserver   if not null, will perform search on specified keyserver. Else, uses
+     *                    keyserver specified in user preferences
+     * @return fragment with arguments set based on passed parameters
+     */
+    public static ImportKeysListFragment newInstance(byte[] bytes, Uri dataUri, String serverQuery,
+                                                     String keyserver) {
+        return newInstance(bytes, dataUri, serverQuery, false, keyserver);
     }
 
-    public static ImportKeysListFragment newInstance(byte[] bytes, Uri dataUri,
-            String serverQuery, boolean nonInteractive) {
+    /**
+     * Visually consists of a list of keyrings with checkboxes to specify which are to be imported
+     * Can immediately load keyrings specified by any of its parameters
+     *
+     * @param bytes          byte data containing list of keyrings to be imported
+     * @param dataUri        file from which keyrings are to be imported
+     * @param serverQuery    query to search for on keyserver
+     * @param nonInteractive if true, users will not be able to check/uncheck items in the list
+     * @param keyserver      if set, will perform search on specified keyserver. If null, falls back
+     *                       to keyserver specified in user preferences
+     * @return fragment with arguments set based on passed parameters
+     */
+    public static ImportKeysListFragment newInstance(byte[] bytes, Uri dataUri, String serverQuery,
+                                                     boolean nonInteractive, String keyserver) {
         ImportKeysListFragment frag = new ImportKeysListFragment();
 
         Bundle args = new Bundle();
@@ -134,6 +160,7 @@ public class ImportKeysListFragment extends ListFragment implements
         args.putParcelable(ARG_DATA_URI, dataUri);
         args.putString(ARG_SERVER_QUERY, serverQuery);
         args.putBoolean(ARG_NON_INTERACTIVE, nonInteractive);
+        args.putString(ARG_KEYSERVER_URL, keyserver);
 
         frag.setArguments(args);
 
@@ -180,16 +207,23 @@ public class ImportKeysListFragment extends ListFragment implements
         setListAdapter(mAdapter);
 
         Bundle args = getArguments();
-        Uri dataUri = args.containsKey(ARG_DATA_URI) ? args.<Uri>getParcelable(ARG_DATA_URI) : null;
-        byte[] bytes = args.containsKey(ARG_BYTES) ? args.getByteArray(ARG_BYTES) : null;
-        String query = args.containsKey(ARG_SERVER_QUERY) ? args.getString(ARG_SERVER_QUERY) : null;
-        mNonInteractive = args.containsKey(ARG_NON_INTERACTIVE) ? args.getBoolean(ARG_NON_INTERACTIVE) : false;
+        Uri dataUri = args.getParcelable(ARG_DATA_URI);
+        byte[] bytes = args.getByteArray(ARG_BYTES);
+        String query = args.getString(ARG_SERVER_QUERY);
+        String keyserver = args.getString(ARG_KEYSERVER_URL);
+        mNonInteractive = args.getBoolean(ARG_NON_INTERACTIVE, false);
 
         if (dataUri != null || bytes != null) {
             mLoaderState = new BytesLoaderState(bytes, dataUri);
         } else if (query != null) {
-            Preferences prefs = Preferences.getPreferences(getActivity());
-            mLoaderState = new CloudLoaderState(query, prefs.getCloudSearchPrefs());
+            Preferences.CloudSearchPrefs cloudSearchPrefs;
+            if (keyserver == null) {
+                cloudSearchPrefs = Preferences.getPreferences(getActivity()).getCloudSearchPrefs();
+            } else {
+                cloudSearchPrefs = new Preferences.CloudSearchPrefs(true, true, keyserver);
+            }
+
+            mLoaderState = new CloudLoaderState(query, cloudSearchPrefs);
         }
 
         getListView().setOnTouchListener(new OnTouchListener() {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysProxyActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysProxyActivity.java
index b9f1bf870..29f2511a0 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysProxyActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysProxyActivity.java
@@ -58,13 +58,12 @@ import java.util.Locale;
 public class ImportKeysProxyActivity extends FragmentActivity {
 
     public static final String ACTION_QR_CODE_API = OpenKeychainIntents.IMPORT_KEY_FROM_QR_CODE;
+    // implies activity returns scanned fingerprint as extra and does not import
     public static final String ACTION_SCAN_WITH_RESULT = Constants.INTENT_PREFIX + "SCAN_QR_CODE_WITH_RESULT";
     public static final String ACTION_SCAN_IMPORT = Constants.INTENT_PREFIX + "SCAN_QR_CODE_IMPORT";
 
     public static final String EXTRA_FINGERPRINT = "fingerprint";
 
-    boolean returnResult;
-
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -82,18 +81,9 @@ public class ImportKeysProxyActivity extends FragmentActivity {
         if (scheme != null && scheme.toLowerCase(Locale.ENGLISH).equals(Constants.FINGERPRINT_SCHEME)) {
             // Scanning a fingerprint directly with Barcode Scanner, thus we already have scanned
 
-            returnResult = false;
             processScannedContent(dataUri);
-        } else if (ACTION_SCAN_IMPORT.equals(action) || ACTION_QR_CODE_API.equals(action)) {
-            returnResult = false;
-            IntentIntegrator integrator = new IntentIntegrator(this);
-            integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES)
-                    .setPrompt(getString(R.string.import_qr_code_text))
-                    .setResultDisplayDuration(0);
-            integrator.setOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
-            integrator.initiateScan();
-        } else if (ACTION_SCAN_WITH_RESULT.equals(action)) {
-            returnResult = true;
+        } else if (ACTION_SCAN_WITH_RESULT.equals(action)
+                || ACTION_SCAN_IMPORT.equals(action) || ACTION_QR_CODE_API.equals(action)) {
             IntentIntegrator integrator = new IntentIntegrator(this);
             integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES)
                     .setPrompt(getString(R.string.import_qr_code_text))
@@ -103,7 +93,6 @@ public class ImportKeysProxyActivity extends FragmentActivity {
         } else if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) {
             // Check to see if the Activity started due to an Android Beam
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
-                returnResult = false;
                 handleActionNdefDiscovered(getIntent());
             } else {
                 Log.e(Constants.TAG, "Android Beam not supported by Android < 4.1");
@@ -147,69 +136,63 @@ public class ImportKeysProxyActivity extends FragmentActivity {
     }
 
     private void processScannedContent(Uri uri) {
+        String action = getIntent().getAction();
 
         Log.d(Constants.TAG, "scanned: " + uri);
 
-        String fingerprint = null;
-
         // example: openpgp4fpr:73EE2314F65FA92EC2390D3A718C070100012282
         if (uri != null && uri.getScheme() != null && uri.getScheme().toLowerCase(Locale.ENGLISH).equals(Constants.FINGERPRINT_SCHEME)) {
-            fingerprint = uri.getEncodedSchemeSpecificPart().toLowerCase(Locale.ENGLISH);
-        }
+            String fingerprint = uri.getEncodedSchemeSpecificPart().toLowerCase(Locale.ENGLISH);
 
-        if (fingerprint == null) {
+            if (ACTION_SCAN_WITH_RESULT.equals(action)) {
+                Intent result = new Intent();
+                result.putExtra(EXTRA_FINGERPRINT, fingerprint);
+                setResult(RESULT_OK, result);
+                finish();
+            } else {
+                importKeys(fingerprint);
+            }
+        } else {
             SingletonResult result = new SingletonResult(
                     SingletonResult.RESULT_ERROR, OperationResult.LogType.MSG_WRONG_QR_CODE);
             Intent intent = new Intent();
             intent.putExtra(SingletonResult.EXTRA_RESULT, result);
             returnResult(intent);
-            return;
-        }
-
-        if (returnResult) {
-            Intent result = new Intent();
-            result.putExtra(EXTRA_FINGERPRINT, fingerprint);
-            setResult(RESULT_OK, result);
-            finish();
-        } else {
-            importKeys(fingerprint);
         }
     }
 
     public void returnResult(Intent data) {
-        if (returnResult) {
-            setResult(RESULT_OK, data);
-            finish();
-        } else {
+        String action = getIntent().getAction();
+
+        if (ACTION_QR_CODE_API.equals(action)) {
             // display last log message but as Toast for calls from outside OpenKeychain
             OperationResult result = data.getParcelableExtra(OperationResult.EXTRA_RESULT);
             String str = getString(result.getLog().getLast().mType.getMsgId());
             Toast.makeText(this, str, Toast.LENGTH_LONG).show();
             finish();
+        } else {
+            setResult(RESULT_OK, data);
+            finish();
         }
     }
 
     public void importKeys(byte[] keyringData) {
-
         ParcelableKeyRing keyEntry = new ParcelableKeyRing(keyringData);
         ArrayList<ParcelableKeyRing> selectedEntries = new ArrayList<>();
         selectedEntries.add(keyEntry);
 
         startImportService(selectedEntries);
-
     }
 
     public void importKeys(String fingerprint) {
-
         ParcelableKeyRing keyEntry = new ParcelableKeyRing(fingerprint, null, null);
         ArrayList<ParcelableKeyRing> selectedEntries = new ArrayList<>();
         selectedEntries.add(keyEntry);
 
         startImportService(selectedEntries);
-
     }
 
-    private void startImportService (ArrayList<ParcelableKeyRing> keyRings) {
+    private void startImportService(ArrayList<ParcelableKeyRing> keyRings) {
 
         // Message is received after importing is done in KeychainIntentService
         ServiceProgressHandler serviceHandler = new ServiceProgressHandler(
@@ -282,7 +265,6 @@ public class ImportKeysProxyActivity extends FragmentActivity {
 
         // start service with intent
         startService(intent);
-
     }
 
     /**
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListFragment.java
index 36ed99f69..edaea539b 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListFragment.java
@@ -682,17 +682,16 @@ public class KeyListFragment extends LoaderFragment
     }
 
     private void showMultiExportDialog(long[] masterKeyIds) {
-        mIdsForRepeatAskPassphrase = new ArrayList<Long>();
-        for(long id: masterKeyIds) {
+        mIdsForRepeatAskPassphrase = new ArrayList<>();
+        for (long id : masterKeyIds) {
             try {
                 if (PassphraseCacheService.getCachedPassphrase(
                         getActivity(), id, id) == null) {
-                    mIdsForRepeatAskPassphrase.add(Long.valueOf(id));
+                    mIdsForRepeatAskPassphrase.add(id);
                 }
             } catch (PassphraseCacheService.KeyNotFoundException e) {
                 // This happens when the master key is stripped
                 // and ignore this key.
-                continue;
             }
         }
         mIndex = 0;
@@ -701,8 +700,8 @@ public class KeyListFragment extends LoaderFragment
             return;
         }
         long[] idsForMultiExport = new long[mIdsForRepeatAskPassphrase.size()];
-        for(int i=0; i<mIdsForRepeatAskPassphrase.size(); ++i) {
-            idsForMultiExport[i] = mIdsForRepeatAskPassphrase.get(i).longValue();
+        for (int i = 0; i < mIdsForRepeatAskPassphrase.size(); ++i) {
+            idsForMultiExport[i] = mIdsForRepeatAskPassphrase.get(i);
         }
         mExportHelper.showExportKeysDialog(idsForMultiExport,
                 Constants.Path.APP_DIR_FILE,
@@ -711,7 +710,7 @@ public class KeyListFragment extends LoaderFragment
 
     private void startPassphraseActivity() {
         Intent intent = new Intent(getActivity(), PassphraseDialogActivity.class);
-        long masterKeyId = mIdsForRepeatAskPassphrase.get(mIndex++).longValue();
+        long masterKeyId = mIdsForRepeatAskPassphrase.get(mIndex++);
         intent.putExtra(PassphraseDialogActivity.EXTRA_SUBKEY_ID, masterKeyId);
         startActivityForResult(intent, REQUEST_REPEAT_PASSPHRASE);
     }
@@ -719,7 +718,7 @@ public class KeyListFragment extends LoaderFragment
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (requestCode == REQUEST_REPEAT_PASSPHRASE) {
-            if(resultCode != Activity.RESULT_OK) {
+            if (resultCode != Activity.RESULT_OK) {
                 return;
             }
             if (mIndex < mIdsForRepeatAskPassphrase.size()) {
@@ -727,8 +726,8 @@ public class KeyListFragment extends LoaderFragment
                 return;
             }
             long[] idsForMultiExport = new long[mIdsForRepeatAskPassphrase.size()];
-            for(int i=0; i<mIdsForRepeatAskPassphrase.size(); ++i) {
-                idsForMultiExport[i] = mIdsForRepeatAskPassphrase.get(i).longValue();
+            for (int i = 0; i < mIdsForRepeatAskPassphrase.size(); ++i) {
+                idsForMultiExport[i] = mIdsForRepeatAskPassphrase.get(i);
             }
             mExportHelper.showExportKeysDialog(idsForMultiExport,
                     Constants.Path.APP_DIR_FILE,
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/MainActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/MainActivity.java
index 5fa3edba4..05cf64092 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/MainActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/MainActivity.java
@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
  * Copyright (C) 2014 Vincent Breitmoser <v.breitmoser@mugenguild.com>
+ * Copyright (C) 2015 Kai Jiang <jiangkai@gmail.com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,36 +21,98 @@ package org.sufficientlysecure.keychain.ui;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentTransaction;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.View;
+import android.widget.AdapterView;
+
+import com.mikepenz.community_material_typeface_library.CommunityMaterial;
+import com.mikepenz.google_material_typeface_library.GoogleMaterial;
+import com.mikepenz.iconics.typeface.FontAwesome;
+import com.mikepenz.materialdrawer.Drawer;
+import com.mikepenz.materialdrawer.model.PrimaryDrawerItem;
+import com.mikepenz.materialdrawer.model.interfaces.IDrawerItem;
 
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.operations.results.OperationResult;
 import org.sufficientlysecure.keychain.remote.ui.AppsListFragment;
-import org.sufficientlysecure.keychain.util.Preferences;
 import org.sufficientlysecure.keychain.util.FabContainer;
+import org.sufficientlysecure.keychain.util.Preferences;
 
-import it.neokree.materialnavigationdrawer.MaterialNavigationDrawer;
+public class MainActivity extends AppCompatActivity implements FabContainer {
 
-public class MainActivity extends MaterialNavigationDrawer implements FabContainer {
+    public Drawer.Result result;
 
-    @Override
-    public void init(Bundle savedInstanceState) {
-        // don't open drawer on first run
-        disableLearningPattern();
+    private KeyListFragment mKeyListFragment ;
+    private AppsListFragment mAppsListFragment;
+    private EncryptDecryptOverviewFragment mEncryptDecryptOverviewFragment;
+    private Fragment mLastUsedFragment;
+    private Toolbar mToolbar;
 
-//        addMultiPaneSupport();
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main_activity);
 
-        // set the header image
-        // create and set the header
-        setDrawerHeaderImage(R.drawable.drawer_header);
+        //initialize FragmentLayout with KeyListFragment at first
+        Fragment mainFragment = new KeyListFragment();
+        FragmentManager fm = getSupportFragmentManager();
+        FragmentTransaction transaction = fm.beginTransaction();
+        transaction.replace(R.id.main_fragment_container, mainFragment);
+        transaction.commit();
 
-        // create sections
-        addSection(newSection(getString(R.string.nav_keys), R.drawable.ic_vpn_key_black_24dp, new KeyListFragment()));
-        addSection(newSection(getString(R.string.nav_encrypt_decrypt), R.drawable.ic_lock_black_24dp, new EncryptDecryptOverviewFragment()));
-        addSection(newSection(getString(R.string.title_api_registered_apps), R.drawable.ic_apps_black_24dp, new AppsListFragment()));
+        mToolbar = (Toolbar) findViewById(R.id.activity_main_toolbar);
+        mToolbar.setTitle(R.string.app_name);
+        setSupportActionBar(mToolbar);
 
-        // create bottom section
-        addBottomSection(newSection(getString(R.string.menu_preferences), R.drawable.ic_settings_black_24dp, new Intent(this, SettingsActivity.class)));
-        addBottomSection(newSection(getString(R.string.menu_help), R.drawable.ic_help_black_24dp, new Intent(this, HelpActivity.class)));
+        result = new Drawer()
+                .withActivity(this)
+                .withHeader(R.layout.main_drawer_header)
+                .withToolbar(mToolbar)
+                .addDrawerItems(
+                        new PrimaryDrawerItem().withName(R.string.nav_keys).withIcon(CommunityMaterial.Icon.cmd_key).withIdentifier(1).withCheckable(false),
+                        new PrimaryDrawerItem().withName(R.string.nav_encrypt_decrypt).withIcon(FontAwesome.Icon.faw_lock).withIdentifier(2).withCheckable(false),
+                        new PrimaryDrawerItem().withName(R.string.title_api_registered_apps).withIcon(CommunityMaterial.Icon.cmd_apps).withIdentifier(3).withCheckable(false)
+                )
+                .addStickyDrawerItems(
+                        // display and stick on bottom of drawer
+                        new PrimaryDrawerItem().withName(R.string.menu_preferences).withIcon(GoogleMaterial.Icon.gmd_settings).withIdentifier(4).withCheckable(false),
+                        new PrimaryDrawerItem().withName(R.string.menu_help).withIcon(CommunityMaterial.Icon.cmd_help_circle).withIdentifier(5).withCheckable(false)
+                )
+                .withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
+                    @Override
+                    public void onItemClick(AdapterView<?> parent, View view, int position, long id, IDrawerItem drawerItem) {
+                        if (drawerItem != null) {
+                            Intent intent = null;
+                            switch(drawerItem.getIdentifier()) {
+                                case 1:
+                                    onKeysSelected();
+                                    break;
+                                case 2:
+                                    onEnDecryptSelected();
+                                    break;
+                                case 3:
+                                    onAppsSelected();
+                                    break;
+                                case 4:
+                                    intent = new Intent(MainActivity.this, SettingsActivity.class);
+                                    break;
+                                case 5:
+                                    intent = new Intent(MainActivity.this, HelpActivity.class);
+                                    break;
+                            }
+                            if (intent != null) {
+                                MainActivity.this.startActivity(intent);
+                            }
+                        }
+                    }
+                })
+                .withSelectedItem(-1)
+                .withSavedInstance(savedInstanceState)
+                .build();
 
         // if this is the first time show first time activity
         Preferences prefs = Preferences.getPreferences(this);
@@ -69,9 +132,83 @@ public class MainActivity extends MaterialNavigationDrawer implements FabContain
         }
     }
 
+    private void clearFragments() {
+        mKeyListFragment = null;
+        mAppsListFragment = null;
+        mEncryptDecryptOverviewFragment = null;
+
+        getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
+    }
+
+    private void setFragment(Fragment fragment) {
+        setFragment(fragment, true);
+    }
+
+    private void setFragment(Fragment fragment, boolean addToBackStack) {
+        this.mLastUsedFragment = fragment;
+        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
+        ft.replace(R.id.main_fragment_container, fragment);
+        if (addToBackStack) {
+            ft.addToBackStack(null);
+        }
+        ft.commit();
+    }
+
+    private boolean onKeysSelected() {
+        mToolbar.setTitle(R.string.app_name);
+        clearFragments();
+
+        if (mKeyListFragment == null) {
+            mKeyListFragment = new KeyListFragment();
+        }
+
+        setFragment(mKeyListFragment, false);
+        return true;
+    }
+
+    private boolean onEnDecryptSelected() {
+        mToolbar.setTitle(R.string.nav_encrypt_decrypt);
+        clearFragments();
+        if (mEncryptDecryptOverviewFragment == null) {
+            mEncryptDecryptOverviewFragment = new EncryptDecryptOverviewFragment();
+        }
+
+        setFragment(mEncryptDecryptOverviewFragment);
+        return true;
+    }
+
+    private boolean onAppsSelected() {
+        mToolbar.setTitle(R.string.nav_apps);
+        clearFragments();
+        if (mAppsListFragment == null) {
+            mAppsListFragment = new AppsListFragment();
+        }
+
+        setFragment(mAppsListFragment);
+        return true;
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        //add the values which need to be saved from the drawer to the bundle
+        outState = result.saveInstanceState(outState);
+        super.onSaveInstanceState(outState);
+    }
+
+    @Override
+    public void onBackPressed(){
+        //handle the back press :D close the drawer first and if the drawer is closed close the activity
+        if (result != null && result.isDrawerOpen()) {
+            result.closeDrawer();
+        } else {
+            super.onBackPressed();
+        }
+    }
+
     @Override
     public void fabMoveUp(int height) {
-        Object fragment = getCurrentSection().getTargetFragment();
+        Object fragment = getSupportFragmentManager()
+                .findFragmentById(R.id.main_fragment_container);
         if (fragment instanceof FabContainer) {
             ((FabContainer) fragment).fabMoveUp(height);
         }
@@ -79,7 +216,8 @@ public class MainActivity extends MaterialNavigationDrawer implements FabContain
 
     @Override
     public void fabRestorePosition() {
-        Object fragment = getCurrentSection().getTargetFragment();
+        Object fragment = getSupportFragmentManager()
+                .findFragmentById(R.id.main_fragment_container);
         if (fragment instanceof FabContainer) {
             ((FabContainer) fragment).fabRestorePosition();
         }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/SettingsKeyServerActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/SettingsKeyServerActivity.java
index 9f2e46b38..8f025c769 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/SettingsKeyServerActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/SettingsKeyServerActivity.java
@@ -20,6 +20,9 @@ package org.sufficientlysecure.keychain.ui;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -28,6 +31,8 @@ import android.widget.TextView;
 
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.ui.base.BaseActivity;
+import org.sufficientlysecure.keychain.ui.dialog.AddKeyserverDialogFragment;
+import org.sufficientlysecure.keychain.ui.util.Notify;
 import org.sufficientlysecure.keychain.ui.widget.Editor;
 import org.sufficientlysecure.keychain.ui.widget.Editor.EditorListener;
 import org.sufficientlysecure.keychain.ui.widget.KeyServerEditor;
@@ -95,7 +100,7 @@ public class SettingsKeyServerActivity extends BaseActivity implements OnClickLi
         Intent intent = getIntent();
         String servers[] = intent.getStringArrayExtra(EXTRA_KEY_SERVERS);
         makeServerList(servers);
-   }
+    }
 
     @Override
     protected void initLayout() {
@@ -124,10 +129,63 @@ public class SettingsKeyServerActivity extends BaseActivity implements OnClickLi
 
     }
 
+    // button to add keyserver clicked
     public void onClick(View v) {
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                Bundle data = message.getData();
+                switch (message.what) {
+                    case AddKeyserverDialogFragment.MESSAGE_OKAY: {
+                        boolean verified = data.getBoolean(AddKeyserverDialogFragment.MESSAGE_VERIFIED);
+                        if (verified) {
+                            Notify.create(SettingsKeyServerActivity.this,
+                                    R.string.add_keyserver_verified, Notify.Style.OK).show();
+                        } else {
+                            Notify.create(SettingsKeyServerActivity.this,
+                                    R.string.add_keyserver_without_verification,
+                                    Notify.Style.WARN).show();
+                        }
+                        String keyserver = data.getString(AddKeyserverDialogFragment.MESSAGE_KEYSERVER);
+                        addKeyserver(keyserver);
+                        break;
+                    }
+                    case AddKeyserverDialogFragment.MESSAGE_VERIFICATION_FAILED: {
+                        AddKeyserverDialogFragment.FailureReason failureReason =
+                                (AddKeyserverDialogFragment.FailureReason) data.getSerializable(
+                                        AddKeyserverDialogFragment.MESSAGE_FAILURE_REASON);
+                        switch (failureReason) {
+                            case CONNECTION_FAILED: {
+                                Notify.create(SettingsKeyServerActivity.this,
+                                        R.string.add_keyserver_connection_failed,
+                                        Notify.Style.ERROR).show();
+                                break;
+                            }
+                            case INVALID_URL: {
+                                Notify.create(SettingsKeyServerActivity.this,
+                                        R.string.add_keyserver_invalid_url,
+                                        Notify.Style.ERROR).show();
+                                break;
+                            }
+                        }
+                        break;
+                    }
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(returnHandler);
+        AddKeyserverDialogFragment dialogFragment = AddKeyserverDialogFragment
+                .newInstance(messenger, R.string.add_keyserver_dialog_title);
+        dialogFragment.show(getSupportFragmentManager(), "addKeyserverDialog");
+    }
+
+    public void addKeyserver(String keyserverUrl) {
         KeyServerEditor view = (KeyServerEditor) mInflater.inflate(R.layout.key_server_editor,
                 mEditors, false);
         view.setEditorListener(this);
+        view.setValue(keyserverUrl);
         mEditors.addView(view);
     }
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysListLoader.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysListLoader.java
index 5447c5f96..139512ba9 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysListLoader.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/ImportKeysListLoader.java
@@ -82,12 +82,12 @@ public class ImportKeysListLoader
 
     @Override
     protected void onStartLoading() {
-        forceLoad();
+        super.forceLoad();
     }
 
     @Override
     protected void onStopLoading() {
-        cancelLoad();
+        super.cancelLoad();
     }
 
     @Override
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/PagerTabStripAdapter.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/PagerTabStripAdapter.java
index 963e77fe9..7b911da96 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/PagerTabStripAdapter.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/PagerTabStripAdapter.java
@@ -21,7 +21,7 @@ import android.app.Activity;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentPagerAdapter;
-import android.support.v7.app.ActionBarActivity;
+import android.support.v7.app.AppCompatActivity;
 
 import java.util.ArrayList;
 
@@ -41,7 +41,7 @@ public class PagerTabStripAdapter extends FragmentPagerAdapter {
         }
     }
 
-    public PagerTabStripAdapter(ActionBarActivity activity) {
+    public PagerTabStripAdapter(AppCompatActivity activity) {
         super(activity.getSupportFragmentManager());
         mActivity = activity;
     }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/TabsAdapter.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/TabsAdapter.java
index 44afed351..a1f00599c 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/TabsAdapter.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/TabsAdapter.java
@@ -24,7 +24,7 @@ import android.support.v4.app.FragmentStatePagerAdapter;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v4.view.ViewPager;
 import android.support.v7.app.ActionBar;
-import android.support.v7.app.ActionBarActivity;
+import android.support.v7.app.AppCompatActivity;
 
 import java.util.ArrayList;
 
@@ -45,7 +45,7 @@ public class TabsAdapter extends FragmentStatePagerAdapter implements ActionBar.
         }
     }
 
-    public TabsAdapter(ActionBarActivity activity, ViewPager pager) {
+    public TabsAdapter(AppCompatActivity activity, ViewPager pager) {
         super(activity.getSupportFragmentManager());
         mContext = activity;
         mActionBar = activity.getSupportActionBar();
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseActivity.java
index 07d2ef8c0..0e752881f 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseActivity.java
@@ -20,7 +20,7 @@ package org.sufficientlysecure.keychain.ui.base;
 import android.app.Activity;
 import android.os.Bundle;
 import android.support.v7.app.ActionBar;
-import android.support.v7.app.ActionBarActivity;
+import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.Gravity;
 import android.view.LayoutInflater;
@@ -33,7 +33,7 @@ import org.sufficientlysecure.keychain.R;
 /**
  * Setups Toolbar
  */
-public abstract class BaseActivity extends ActionBarActivity {
+public abstract class BaseActivity extends AppCompatActivity {
     protected Toolbar mToolbar;
     protected View mStatusBar;
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseNfcActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseNfcActivity.java
index 95c1690b1..1d09b281f 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseNfcActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/base/BaseNfcActivity.java
@@ -57,6 +57,9 @@ public abstract class BaseNfcActivity extends BaseActivity {
     public static final int REQUEST_CODE_PASSPHRASE = 1;
 
     protected Passphrase mPin;
+    protected boolean mPw1ValidForMultipleSignatures;
+    protected boolean mPw1ValidatedForSignature;
+    protected boolean mPw1ValidatedForDecrypt; // Mode 82 does other things; consider renaming?
     private NfcAdapter mNfcAdapter;
     private IsoDep mIsoDep;
 
@@ -197,10 +200,15 @@ public abstract class BaseNfcActivity extends BaseActivity {
                         + "06" // Lc (number of bytes)
                         + "D27600012401" // Data (6 bytes)
                         + "00"; // Le
-        if ( ! nfcCommunicate(opening).equals(accepted)) { // activate connection
+        if ( ! nfcCommunicate(opening).endsWith(accepted)) { // activate connection
             throw new IOException("Initialization failed!");
         }
 
+        byte[] pwStatusBytes = nfcGetPwStatusBytes();
+        mPw1ValidForMultipleSignatures = (pwStatusBytes[0] == 1);
+        mPw1ValidatedForSignature = false;
+        mPw1ValidatedForDecrypt = false;
+
         onNfcPerform();
 
         mIsoDep.close();
@@ -278,6 +286,15 @@ public abstract class BaseNfcActivity extends BaseActivity {
         return fptlv.mV;
     }
 
+    /** Return the PW Status Bytes from the card. This is a simple DO; no TLV decoding needed.
+     *
+     * @return Seven bytes in fixed format, plus 0x9000 status word at the end.
+     */
+    public byte[] nfcGetPwStatusBytes() throws IOException {
+        String data = "00CA00C400";
+        return mIsoDep.transceive(Hex.decode(data));
+    }
+
     /** Return the fingerprint from application specific data stored on tag, or
      * null if it doesn't exist.
      *
@@ -316,7 +333,9 @@ public abstract class BaseNfcActivity extends BaseActivity {
      * @return a big integer representing the MPI for the given hash
      */
     public byte[] nfcCalculateSignature(byte[] hash, int hashAlgo) throws IOException {
-        nfcVerifyPIN(0x81); // (Verify PW1 with mode 81 for signing)
+        if (!mPw1ValidatedForSignature) {
+            nfcVerifyPIN(0x81); // (Verify PW1 with mode 81 for signing)
+        }
 
         // dsi, including Lc
         String dsi;
@@ -391,6 +410,10 @@ public abstract class BaseNfcActivity extends BaseActivity {
 
         Log.d(Constants.TAG, "final response:" + status);
 
+        if (!mPw1ValidForMultipleSignatures) {
+            mPw1ValidatedForSignature = false;
+        }
+
         if ( ! "9000".equals(status)) {
             throw new IOException("Bad NFC response code: " + status);
         }
@@ -410,7 +433,9 @@ public abstract class BaseNfcActivity extends BaseActivity {
      * @return the decoded session key
      */
     public byte[] nfcDecryptSessionKey(byte[] encryptedSessionKey) throws IOException {
-        nfcVerifyPIN(0x82); // (Verify PW1 with mode 82 for decryption)
+        if (!mPw1ValidatedForDecrypt) {
+            nfcVerifyPIN(0x82); // (Verify PW1 with mode 82 for decryption)
+        }
 
         String firstApdu = "102a8086fe";
         String secondApdu = "002a808603";
@@ -458,6 +483,12 @@ public abstract class BaseNfcActivity extends BaseActivity {
                 handlePinError();
                 throw new IOException("Bad PIN!");
             }
+
+            if (mode == 0x81) {
+                mPw1ValidatedForSignature = true;
+            } else if (mode == 0x82) {
+                mPw1ValidatedForDecrypt = true;
+            }
         }
     }
 
@@ -476,6 +507,9 @@ public abstract class BaseNfcActivity extends BaseActivity {
      */
     public void enableNfcForegroundDispatch() {
         mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
+        if (mNfcAdapter == null) {
+            return;
+        }
         Intent nfcI = new Intent(this, getClass())
                 .addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
         PendingIntent nfcPendingIntent = PendingIntent.getActivity(this, 0, nfcI, PendingIntent.FLAG_CANCEL_CURRENT);
@@ -497,6 +531,9 @@ public abstract class BaseNfcActivity extends BaseActivity {
      * Disable foreground dispatch in onPause!
      */
     public void disableNfcForegroundDispatch() {
+        if (mNfcAdapter == null) {
+            return;
+        }
         mNfcAdapter.disableForegroundDispatch(this);
         Log.d(Constants.TAG, "NfcForegroundDispatch has been disabled!");
     }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddKeyserverDialogFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddKeyserverDialogFragment.java
new file mode 100644
index 000000000..cbef5950f
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddKeyserverDialogFragment.java
@@ -0,0 +1,320 @@
+/*
+ * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.ui.dialog;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.support.v4.app.DialogFragment;
+import android.test.suitebuilder.TestSuiteBuilder;
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.util.Log;
+import org.sufficientlysecure.keychain.util.TlsHelper;
+
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+
+import javax.net.ssl.HttpsURLConnection;
+
+public class AddKeyserverDialogFragment extends DialogFragment implements OnEditorActionListener {
+    private static final String ARG_MESSENGER = "messenger";
+    private static final String ARG_TITLE = "title";
+
+    public static final int MESSAGE_OKAY = 1;
+    public static final int MESSAGE_VERIFICATION_FAILED = 2;
+
+    public static final String MESSAGE_KEYSERVER = "new_keyserver";
+    public static final String MESSAGE_VERIFIED = "verified";
+    public static final String MESSAGE_FAILURE_REASON = "failure_reason";
+
+    private Messenger mMessenger;
+    private EditText mKeyserverEditText;
+    private CheckBox mVerifyKeyserverCheckBox;
+
+    public static enum FailureReason {
+        INVALID_URL,
+        CONNECTION_FAILED
+    }
+
+    ;
+
+    /**
+     * Creates new instance of this dialog fragment
+     *
+     * @param title     title of dialog
+     * @param messenger to communicate back after setting the passphrase
+     * @return
+     */
+    public static AddKeyserverDialogFragment newInstance(Messenger messenger, int title) {
+        AddKeyserverDialogFragment frag = new AddKeyserverDialogFragment();
+        Bundle args = new Bundle();
+        args.putInt(ARG_TITLE, title);
+        args.putParcelable(ARG_MESSENGER, messenger);
+
+        frag.setArguments(args);
+
+        return frag;
+    }
+
+    /**
+     * Creates dialog
+     */
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        final Activity activity = getActivity();
+
+        int title = getArguments().getInt(ARG_TITLE);
+        mMessenger = getArguments().getParcelable(ARG_MESSENGER);
+
+        CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity);
+
+        alert.setTitle(title);
+
+        LayoutInflater inflater = activity.getLayoutInflater();
+        View view = inflater.inflate(R.layout.add_keyserver_dialog, null);
+        alert.setView(view);
+
+        mKeyserverEditText = (EditText) view.findViewById(R.id.keyserver_url_edit_text);
+        mVerifyKeyserverCheckBox = (CheckBox) view.findViewById(R.id.verify_keyserver_checkbox);
+
+        // we don't want dialog to be dismissed on click, thereby requiring the hack seen below
+        // and in onStart
+        alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int id) {
+                // we need to have an empty listener to prevent errors on some devices as mentioned
+                // at http://stackoverflow.com/q/13746412/3000919
+                // actual listener set in onStart
+            }
+        });
+
+        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+
+            @Override
+            public void onClick(DialogInterface dialog, int id) {
+                dismiss();
+            }
+        });
+
+        // Hack to open keyboard.
+        // This is the only method that I found to work across all Android versions
+        // http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/
+        // Notes: * onCreateView can't be used because we want to add buttons to the dialog
+        //        * opening in onActivityCreated does not work on Android 4.4
+        mKeyserverEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
+            @Override
+            public void onFocusChange(View v, boolean hasFocus) {
+                mKeyserverEditText.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        InputMethodManager imm = (InputMethodManager) getActivity()
+                                .getSystemService(Context.INPUT_METHOD_SERVICE);
+                        imm.showSoftInput(mKeyserverEditText, InputMethodManager.SHOW_IMPLICIT);
+                    }
+                });
+            }
+        });
+        mKeyserverEditText.requestFocus();
+
+        mKeyserverEditText.setImeActionLabel(getString(android.R.string.ok),
+                EditorInfo.IME_ACTION_DONE);
+        mKeyserverEditText.setOnEditorActionListener(this);
+
+        return alert.show();
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        AlertDialog addKeyserverDialog = (AlertDialog) getDialog();
+        if (addKeyserverDialog != null) {
+            Button positiveButton = addKeyserverDialog.getButton(Dialog.BUTTON_POSITIVE);
+            positiveButton.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    String keyserverUrl = mKeyserverEditText.getText().toString();
+                    if (mVerifyKeyserverCheckBox.isChecked()) {
+                        verifyConnection(keyserverUrl);
+                    } else {
+                        dismiss();
+                        // return unverified keyserver back to activity
+                        addKeyserver(keyserverUrl, false);
+                    }
+                }
+            });
+        }
+    }
+
+    public void addKeyserver(String keyserver, boolean verified) {
+        dismiss();
+        Bundle data = new Bundle();
+        data.putString(MESSAGE_KEYSERVER, keyserver);
+        data.putBoolean(MESSAGE_VERIFIED, verified);
+
+        sendMessageToHandler(MESSAGE_OKAY, data);
+    }
+
+    public void verificationFailed(FailureReason reason) {
+        Bundle data = new Bundle();
+        data.putSerializable(MESSAGE_FAILURE_REASON, reason);
+
+        sendMessageToHandler(MESSAGE_VERIFICATION_FAILED, data);
+    }
+
+    public void verifyConnection(String keyserver) {
+
+        new AsyncTask<String, Void, FailureReason>() {
+            ProgressDialog mProgressDialog;
+            String mKeyserver;
+
+            @Override
+            protected void onPreExecute() {
+                mProgressDialog = new ProgressDialog(getActivity());
+                mProgressDialog.setMessage(getString(R.string.progress_verifying_keyserver_url));
+                mProgressDialog.setCancelable(false);
+                mProgressDialog.show();
+            }
+
+            @Override
+            protected FailureReason doInBackground(String... keyservers) {
+                mKeyserver = keyservers[0];
+                FailureReason reason = null;
+                try {
+                    // replace hkps/hkp scheme and reconstruct Uri
+                    Uri keyserverUri = Uri.parse(mKeyserver);
+                    String scheme = keyserverUri.getScheme();
+                    String schemeSpecificPart = keyserverUri.getSchemeSpecificPart();
+                    String fragment = keyserverUri.getFragment();
+                    if (scheme == null) throw new MalformedURLException();
+                    if (scheme.equalsIgnoreCase("hkps")) scheme = "https";
+                    else if (scheme.equalsIgnoreCase("hkp")) scheme = "http";
+                    URI newKeyserver = new URI(scheme, schemeSpecificPart, fragment);
+
+                    Log.d("Converted URL", newKeyserver.toString());
+                    TlsHelper.openConnection(newKeyserver.toURL()).getInputStream();
+                } catch (TlsHelper.TlsHelperException e) {
+                    reason = FailureReason.CONNECTION_FAILED;
+                } catch (MalformedURLException e) {
+                    Log.w(Constants.TAG, "Invalid keyserver URL entered by user.");
+                    reason = FailureReason.INVALID_URL;
+                } catch (URISyntaxException e) {
+                    Log.w(Constants.TAG, "Invalid keyserver URL entered by user.");
+                    reason = FailureReason.INVALID_URL;
+                } catch (IOException e) {
+                    Log.w(Constants.TAG, "Could not connect to entered keyserver url");
+                    reason = FailureReason.CONNECTION_FAILED;
+                }
+                return reason;
+            }
+
+            @Override
+            protected void onPostExecute(FailureReason failureReason) {
+                mProgressDialog.dismiss();
+                if (failureReason == null) {
+                    addKeyserver(mKeyserver, true);
+                } else {
+                    verificationFailed(failureReason);
+                }
+            }
+        }.execute(keyserver);
+    }
+
+    @Override
+    public void onDismiss(DialogInterface dialog) {
+        super.onDismiss(dialog);
+
+        // hide keyboard on dismiss
+        hideKeyboard();
+    }
+
+    private void hideKeyboard() {
+        if (getActivity() == null) {
+            return;
+        }
+        InputMethodManager inputManager = (InputMethodManager) getActivity()
+                .getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        //check if no view has focus:
+        View v = getActivity().getCurrentFocus();
+        if (v == null)
+            return;
+
+        inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
+    }
+
+    /**
+     * Associate the "done" button on the soft keyboard with the okay button in the view
+     */
+    @Override
+    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+        if (EditorInfo.IME_ACTION_DONE == actionId) {
+            AlertDialog dialog = ((AlertDialog) getDialog());
+            Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
+
+            bt.performClick();
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Send message back to handler which is initialized in a activity
+     *
+     * @param what Message integer you want to send
+     */
+    private void sendMessageToHandler(Integer what, Bundle data) {
+        Message msg = Message.obtain();
+        msg.what = what;
+        if (data != null) {
+            msg.setData(data);
+        }
+
+        try {
+            mMessenger.send(msg);
+        } catch (RemoteException e) {
+            Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
+        } catch (NullPointerException e) {
+            Log.w(Constants.TAG, "Messenger is null!", e);
+        }
+    }
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EmailEditText.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EmailEditText.java
index e21c5d510..e55f6b1ad 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EmailEditText.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EmailEditText.java
@@ -17,9 +17,8 @@
 
 package org.sufficientlysecure.keychain.ui.widget;
 
-import android.annotation.TargetApi;
 import android.content.Context;
-import android.os.Build;
+import android.support.v7.widget.AppCompatAutoCompleteTextView;
 import android.text.Editable;
 import android.text.InputType;
 import android.text.TextWatcher;
@@ -27,14 +26,13 @@ import android.util.AttributeSet;
 import android.util.Patterns;
 import android.view.inputmethod.EditorInfo;
 import android.widget.ArrayAdapter;
-import android.widget.AutoCompleteTextView;
 
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.util.ContactHelper;
 
 import java.util.regex.Matcher;
 
-public class EmailEditText extends AutoCompleteTextView {
+public class EmailEditText extends AppCompatAutoCompleteTextView {
 
     public EmailEditText(Context context) {
         super(context);
@@ -51,12 +49,6 @@ public class EmailEditText extends AutoCompleteTextView {
         init();
     }
 
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    public EmailEditText(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-        init();
-    }
-
     private void init() {
         setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS);
         reenableKeyboardSuggestions();
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/KeySpinner.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/KeySpinner.java
index 5a6c61f7d..8cf15a75a 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/KeySpinner.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/KeySpinner.java
@@ -25,7 +25,7 @@ import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.LoaderManager;
 import android.support.v4.content.Loader;
 import android.support.v4.widget.CursorAdapter;
-import android.support.v7.internal.widget.TintSpinner;
+import android.support.v7.widget.AppCompatSpinner;
 import android.text.format.DateFormat;
 import android.util.AttributeSet;
 import android.view.View;
@@ -47,10 +47,10 @@ import java.util.Date;
 import java.util.TimeZone;
 
 /**
- * Use TintSpinner from AppCompat lib instead of Spinner. Fixes white dropdown icon.
+ * Use AppCompatSpinner from AppCompat lib instead of Spinner. Fixes white dropdown icon.
  * Related: http://stackoverflow.com/a/27713090
  */
-public abstract class KeySpinner extends TintSpinner implements LoaderManager.LoaderCallbacks<Cursor> {
+public abstract class KeySpinner extends AppCompatSpinner implements LoaderManager.LoaderCallbacks<Cursor> {
     public interface OnKeyChangedListener {
         public void onKeyChanged(long masterKeyId);
     }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/NameEditText.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/NameEditText.java
index 153bf2ff2..1a034537c 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/NameEditText.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/NameEditText.java
@@ -17,17 +17,15 @@
 
 package org.sufficientlysecure.keychain.ui.widget;
 
-import android.annotation.TargetApi;
 import android.content.Context;
-import android.os.Build;
+import android.support.v7.widget.AppCompatAutoCompleteTextView;
 import android.util.AttributeSet;
 import android.view.inputmethod.EditorInfo;
 import android.widget.ArrayAdapter;
-import android.widget.AutoCompleteTextView;
 
 import org.sufficientlysecure.keychain.util.ContactHelper;
 
-public class NameEditText extends AutoCompleteTextView {
+public class NameEditText extends AppCompatAutoCompleteTextView {
     public NameEditText(Context context) {
         super(context);
         init();
@@ -43,12 +41,6 @@ public class NameEditText extends AutoCompleteTextView {
         init();
     }
 
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    public NameEditText(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-        init();
-    }
-
     private void init() {
         reenableKeyboardSuggestions();
         initAdapter();
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PassphraseEditText.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PassphraseEditText.java
index 377f701d1..9364c5ee9 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PassphraseEditText.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PassphraseEditText.java
@@ -19,15 +19,13 @@ package org.sufficientlysecure.keychain.ui.widget;
 
 import android.content.Context;
 import android.graphics.Canvas;
+import android.support.v7.widget.AppCompatEditText;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.util.AttributeSet;
 import android.util.TypedValue;
-import android.widget.EditText;
 
-import org.sufficientlysecure.keychain.ui.widget.passwordstrengthindicator.PasswordStrengthBarView;
-
-public class PassphraseEditText extends EditText {
+public class PassphraseEditText extends AppCompatEditText {
 
     PasswordStrengthBarView mPasswordStrengthBarView;
     int mPasswordBarWidth;
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/passwordstrengthindicator/PasswordStrengthBarView.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PasswordStrengthBarView.java
index 9e06c4cce..e5886345f 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/passwordstrengthindicator/PasswordStrengthBarView.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PasswordStrengthBarView.java
@@ -22,13 +22,10 @@
  * SOFTWARE.
  */
 
-package org.sufficientlysecure.keychain.ui.widget.passwordstrengthindicator;
+package org.sufficientlysecure.keychain.ui.widget;
 
 import android.content.Context;
 import android.graphics.Canvas;
-import android.graphics.Paint;
-import android.graphics.PorterDuff;
-import android.graphics.PorterDuffXfermode;
 import android.util.AttributeSet;
 
 /**
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/passwordstrengthindicator/PasswordStrengthView.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PasswordStrengthView.java
index bc5018497..1487c3053 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/passwordstrengthindicator/PasswordStrengthView.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/PasswordStrengthView.java
@@ -22,7 +22,7 @@
  * SOFTWARE.
  */
 
-package org.sufficientlysecure.keychain.ui.widget.passwordstrengthindicator;
+package org.sufficientlysecure.keychain.ui.widget;
 
 import android.content.Context;
 import android.content.res.TypedArray;
@@ -56,7 +56,6 @@ import org.sufficientlysecure.keychain.R;
  */
 public class PasswordStrengthView extends View {
 
-
     protected int mMinWidth;
     protected int mMinHeight;
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Preferences.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Preferences.java
index 8a7638054..303687315 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Preferences.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Preferences.java
@@ -193,6 +193,11 @@ public class Preferences {
         public final boolean searchKeybase;
         public final String keyserver;
 
+        /**
+         * @param searchKeyserver should passed keyserver be searched
+         * @param searchKeybase   should keybase.io be searched
+         * @param keyserver       the keyserver url authority to search on
+         */
         public CloudSearchPrefs(boolean searchKeyserver, boolean searchKeybase, String keyserver) {
             this.searchKeyserver = searchKeyserver;
             this.searchKeybase = searchKeybase;