Merge pull request #767 from mar-v-in/issue-763

Use dropdown in CertifyActivity

8 files changed, 362 insertions, 162 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
index dd59f8603..c239ea7f7 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
@@ -111,6 +111,7 @@ public class KeychainContract {
         public static final String HAS_ANY_SECRET = "has_any_secret";
         public static final String HAS_ENCRYPT = "has_encrypt";
         public static final String HAS_SIGN = "has_sign";
+        public static final String HAS_CERTIFY = "has_certify";
         public static final String PUBKEY_DATA = "pubkey_data";
         public static final String PRIVKEY_DATA = "privkey_data";
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java
index c914cb5b7..2c552a060 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java
@@ -271,6 +271,8 @@ public class KeychainProvider extends ContentProvider {
                         "kE." + Keys.KEY_ID + " AS " + KeyRings.HAS_ENCRYPT);
                 projectionMap.put(KeyRings.HAS_SIGN,
                         "kS." + Keys.KEY_ID + " AS " + KeyRings.HAS_SIGN);
+                projectionMap.put(KeyRings.HAS_CERTIFY,
+                        "kC." + Keys.KEY_ID + " AS " + KeyRings.HAS_CERTIFY);
                 projectionMap.put(KeyRings.IS_EXPIRED,
                         "(" + Tables.KEYS + "." + Keys.EXPIRY + " IS NOT NULL AND " + Tables.KEYS + "." + Keys.EXPIRY
                                 + " < " + new Date().getTime() / 1000 + ") AS " + KeyRings.IS_EXPIRED);
@@ -324,6 +326,15 @@ public class KeychainProvider extends ContentProvider {
                                 + " AND ( kS." + Keys.EXPIRY + " IS NULL OR kS." + Keys.EXPIRY
                                     + " >= " + new Date().getTime() / 1000 + " )"
                             + ")" : "")
+                        + (plist.contains(KeyRings.HAS_CERTIFY) ?
+                            " LEFT JOIN " + Tables.KEYS + " AS kC ON ("
+                                +"kC." + Keys.MASTER_KEY_ID
+                                + " = " + Tables.KEYS + "." + Keys.MASTER_KEY_ID
+                                + " AND kC." + Keys.IS_REVOKED + " = 0"
+                                + " AND kC." + Keys.CAN_CERTIFY + " = 1"
+                                + " AND ( kC." + Keys.EXPIRY + " IS NULL OR kC." + Keys.EXPIRY
+                                + " >= " + new Date().getTime() / 1000 + " )"
+                                + ")" : "")
                     );
                 qb.appendWhere(Tables.KEYS + "." + Keys.RANK + " = 0");
                 // in case there are multiple verifying certificates
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java
index c1986825c..7c6e94d5e 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java
@@ -56,6 +56,8 @@ import org.sufficientlysecure.keychain.service.OperationResultParcel;
 import org.sufficientlysecure.keychain.service.PassphraseCacheService;
 import org.sufficientlysecure.keychain.ui.adapter.UserIdsAdapter;
 import org.sufficientlysecure.keychain.ui.dialog.PassphraseDialogFragment;
+import org.sufficientlysecure.keychain.ui.widget.CertifyKeySpinner;
+import org.sufficientlysecure.keychain.ui.widget.KeySpinner;
 import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.util.Notify;
 
@@ -64,18 +66,17 @@ import java.util.ArrayList;
 /**
  * Signs the specified public key with the specified secret master key
  */
-public class CertifyKeyActivity extends ActionBarActivity implements
-        SelectSecretKeyLayoutFragment.SelectSecretKeyCallback, LoaderManager.LoaderCallbacks<Cursor> {
+public class CertifyKeyActivity extends ActionBarActivity implements LoaderManager.LoaderCallbacks<Cursor> {
     private View mCertifyButton;
     private ImageView mActionCertifyImage;
     private CheckBox mUploadKeyCheckbox;
     private Spinner mSelectKeyserverSpinner;
 
-    private SelectSecretKeyLayoutFragment mSelectKeyFragment;
+    private CertifyKeySpinner mCertifyKeySpinner;
 
     private Uri mDataUri;
-    private long mPubKeyId = 0;
-    private long mMasterKeyId = 0;
+    private long mPubKeyId = Constants.key.none;
+    private long mMasterKeyId = Constants.key.none;
 
     private ListView mUserIds;
     private UserIdsAdapter mUserIdsAdapter;
@@ -89,8 +90,7 @@ public class CertifyKeyActivity extends ActionBarActivity implements
 
         setContentView(R.layout.certify_key_activity);
 
-        mSelectKeyFragment = (SelectSecretKeyLayoutFragment) getSupportFragmentManager()
-                .findFragmentById(R.id.sign_key_select_key_fragment);
+        mCertifyKeySpinner = (CertifyKeySpinner) findViewById(R.id.certify_key_spinner);
         mSelectKeyserverSpinner = (Spinner) findViewById(R.id.upload_key_keyserver);
         mUploadKeyCheckbox = (CheckBox) findViewById(R.id.sign_key_upload_checkbox);
         mCertifyButton = findViewById(R.id.certify_key_certify_button);
@@ -101,8 +101,12 @@ public class CertifyKeyActivity extends ActionBarActivity implements
         mActionCertifyImage.setColorFilter(getResources().getColor(R.color.tertiary_text_light),
                 PorterDuff.Mode.SRC_IN);
 
-        mSelectKeyFragment.setCallback(this);
-        mSelectKeyFragment.setFilterCertify(true);
+        mCertifyKeySpinner.setOnKeyChangedListener(new KeySpinner.OnKeyChangedListener() {
+            @Override
+            public void onKeyChanged(long masterKeyId) {
+                mMasterKeyId = masterKeyId;
+            }
+        });
 
         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_spinner_item, Preferences.getPreferences(this)
@@ -135,7 +139,6 @@ public class CertifyKeyActivity extends ActionBarActivity implements
             public void onClick(View v) {
                 if (mPubKeyId != 0) {
                     if (mMasterKeyId == 0) {
-                        mSelectKeyFragment.setError(getString(R.string.select_key_to_certify));
                         Notify.showNotify(CertifyKeyActivity.this, getString(R.string.select_key_to_certify),
                                 Notify.Style.ERROR);
                     } else {
@@ -199,6 +202,7 @@ public class CertifyKeyActivity extends ActionBarActivity implements
                 if (data.moveToFirst()) {
                     // TODO: put findViewById in onCreate!
                     mPubKeyId = data.getLong(INDEX_MASTER_KEY_ID);
+                    mCertifyKeySpinner.setHiddenMasterKeyId(mPubKeyId);
                     String keyIdStr = PgpKeyHelper.convertKeyIdToHex(mPubKeyId);
                     ((TextView) findViewById(R.id.key_id)).setText(keyIdStr);
 
@@ -367,14 +371,6 @@ public class CertifyKeyActivity extends ActionBarActivity implements
         startService(intent);
     }
 
-    /**
-     * callback from select key fragment
-     */
-    @Override
-    public void onKeySelected(long secretKeyId) {
-        mMasterKeyId = secretKeyId;
-    }
-
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
index a402b6f68..748cbca14 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptAsymmetricFragment.java
@@ -47,6 +47,7 @@ import org.sufficientlysecure.keychain.provider.CachedPublicKeyRing;
 import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
 import org.sufficientlysecure.keychain.ui.widget.EncryptKeyCompletionView;
+import org.sufficientlysecure.keychain.ui.widget.KeySpinner;
 import org.sufficientlysecure.keychain.util.Log;
 
 import java.util.ArrayList;
@@ -54,22 +55,20 @@ import java.util.Iterator;
 import java.util.List;
 
 public class EncryptAsymmetricFragment extends Fragment implements EncryptActivityInterface.UpdateListener {
-    public static final String ARG_SIGNATURE_KEY_ID = "signature_key_id";
-    public static final String ARG_ENCRYPTION_KEY_IDS = "encryption_key_ids";
-
     ProviderHelper mProviderHelper;
 
     // view
-    private Spinner mSign;
+    private KeySpinner mSign;
     private EncryptKeyCompletionView mEncryptKeyView;
-    private SelectSignKeyCursorAdapter mSignAdapter = new SelectSignKeyCursorAdapter();
 
     // model
     private EncryptActivityInterface mEncryptInterface;
 
     @Override
     public void onNotifyUpdate() {
-
+        if (mSign != null) {
+            mSign.setSelectedKeyId(mEncryptInterface.getSignatureKey());
+        }
     }
 
     @Override
@@ -101,17 +100,11 @@ public class EncryptAsymmetricFragment extends Fragment implements EncryptActivi
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.encrypt_asymmetric_fragment, container, false);
 
-        mSign = (Spinner) view.findViewById(R.id.sign);
-        mSign.setAdapter(mSignAdapter);
-        mSign.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
-            @Override
-            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
-                setSignatureKeyId(parent.getAdapter().getItemId(position));
-            }
-
+        mSign = (KeySpinner) view.findViewById(R.id.sign);
+        mSign.setOnKeyChangedListener(new KeySpinner.OnKeyChangedListener() {
             @Override
-            public void onNothingSelected(AdapterView<?> parent) {
-                setSignatureKeyId(Constants.key.none);
+            public void onKeyChanged(long masterKeyId) {
+                setSignatureKeyId(masterKeyId);
             }
         });
         mEncryptKeyView = (EncryptKeyCompletionView) view.findViewById(R.id.recipient_list);
@@ -128,42 +121,6 @@ public class EncryptAsymmetricFragment extends Fragment implements EncryptActivi
         // preselect keys given
         preselectKeys();
 
-        getLoaderManager().initLoader(1, null, new LoaderManager.LoaderCallbacks<Cursor>() {
-            @Override
-            public Loader<Cursor> onCreateLoader(int id, Bundle args) {
-                // This is called when a new Loader needs to be created. This
-                // sample only has one Loader, so we don't care about the ID.
-                Uri baseUri = KeyRings.buildUnifiedKeyRingsUri();
-
-                // These are the rows that we will retrieve.
-                String[] projection = new String[]{
-                        KeyRings._ID,
-                        KeyRings.MASTER_KEY_ID,
-                        KeyRings.KEY_ID,
-                        KeyRings.USER_ID,
-                        KeyRings.IS_EXPIRED,
-                        KeyRings.HAS_SIGN,
-                        KeyRings.HAS_ANY_SECRET
-                };
-
-                String where = KeyRings.HAS_ANY_SECRET + " = 1 AND " + KeyRings.HAS_SIGN + " NOT NULL AND "
-                        + KeyRings.IS_REVOKED + " = 0 AND " + KeyRings.IS_EXPIRED + " = 0";
-
-                // Now create and return a CursorLoader that will take care of
-                // creating a Cursor for the data being displayed.
-                return new CursorLoader(getActivity(), baseUri, projection, where, null, null);
-            }
-
-            @Override
-            public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
-                mSignAdapter.swapCursor(data);
-            }
-
-            @Override
-            public void onLoaderReset(Loader<Cursor> loader) {
-                mSignAdapter.swapCursor(null);
-            }
-        });
         mEncryptKeyView.setTokenListener(new TokenCompleteTextView.TokenListener() {
             @Override
             public void onTokenAdded(Object token) {
@@ -194,6 +151,7 @@ public class EncryptAsymmetricFragment extends Fragment implements EncryptActivi
                         KeyRings.buildUnifiedKeyRingUri(signatureKey));
                 if(keyring.hasAnySecret()) {
                     setSignatureKeyId(keyring.getMasterKeyId());
+                    mSign.setSelectedKeyId(mEncryptInterface.getSignatureKey());
                 }
             } catch (PgpGeneralException e) {
                 Log.e(Constants.TAG, "key not found!", e);
@@ -233,95 +191,4 @@ public class EncryptAsymmetricFragment extends Fragment implements EncryptActivi
         setEncryptionKeyIds(keyIdsArr);
         setEncryptionUserIds(userIds.toArray(new String[userIds.size()]));
     }
-
-    private class SelectSignKeyCursorAdapter extends BaseAdapter implements SpinnerAdapter {
-        private CursorAdapter inner;
-        private int mIndexUserId;
-        private int mIndexKeyId;
-        private int mIndexMasterKeyId;
-
-        public SelectSignKeyCursorAdapter() {
-            inner = new CursorAdapter(null, null, 0) {
-                @Override
-                public View newView(Context context, Cursor cursor, ViewGroup parent) {
-                    return getActivity().getLayoutInflater().inflate(R.layout.encrypt_asymmetric_signkey, null);
-                }
-
-                @Override
-                public void bindView(View view, Context context, Cursor cursor) {
-                    String[] userId = KeyRing.splitUserId(cursor.getString(mIndexUserId));
-                    ((TextView) view.findViewById(android.R.id.title)).setText(userId[2] == null ? userId[0] : (userId[0] + " (" + userId[2] + ")"));
-                    ((TextView) view.findViewById(android.R.id.text1)).setText(userId[1]);
-                    ((TextView) view.findViewById(android.R.id.text2)).setText(PgpKeyHelper.convertKeyIdToHex(cursor.getLong(mIndexKeyId)));
-                }
-
-                @Override
-                public long getItemId(int position) {
-                    mCursor.moveToPosition(position);
-                    return mCursor.getLong(mIndexMasterKeyId);
-                }
-            };
-        }
-
-        public Cursor swapCursor(Cursor newCursor) {
-            if (newCursor == null) return inner.swapCursor(null);
-
-            mIndexKeyId = newCursor.getColumnIndex(KeyRings.KEY_ID);
-            mIndexUserId = newCursor.getColumnIndex(KeyRings.USER_ID);
-            mIndexMasterKeyId = newCursor.getColumnIndex(KeyRings.MASTER_KEY_ID);
-            if (newCursor.moveToFirst()) {
-                do {
-                    if (newCursor.getLong(mIndexMasterKeyId) == mEncryptInterface.getSignatureKey()) {
-                        mSign.setSelection(newCursor.getPosition() + 1);
-                    }
-                } while (newCursor.moveToNext());
-            }
-            return inner.swapCursor(newCursor);
-        }
-
-        @Override
-        public int getCount() {
-            return inner.getCount() + 1;
-        }
-
-        @Override
-        public Object getItem(int position) {
-            if (position == 0) return null;
-            return inner.getItem(position - 1);
-        }
-
-        @Override
-        public long getItemId(int position) {
-            if (position == 0) return Constants.key.none;
-            return inner.getItemId(position - 1);
-        }
-
-        @Override
-        public View getView(int position, View convertView, ViewGroup parent) {
-            View v = getDropDownView(position, convertView, parent);
-            v.findViewById(android.R.id.text1).setVisibility(View.GONE);
-            return v;
-        }
-
-        @Override
-        public View getDropDownView(int position, View convertView, ViewGroup parent) {
-            View v;
-            if (position == 0) {
-                if (convertView == null) {
-                    v = inner.newView(null, null, parent);
-                } else {
-                    v = convertView;
-                }
-                ((TextView) v.findViewById(android.R.id.title)).setText("None");
-                v.findViewById(android.R.id.text1).setVisibility(View.GONE);
-                v.findViewById(android.R.id.text2).setVisibility(View.GONE);
-            } else {
-                v = inner.getView(position - 1, convertView, parent);
-                v.findViewById(android.R.id.text1).setVisibility(View.VISIBLE);
-                v.findViewById(android.R.id.text2).setVisibility(View.VISIBLE);
-            }
-            return v;
-        }
-    }
-
 }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/CertifyKeySpinner.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/CertifyKeySpinner.java
new file mode 100644
index 000000000..030a76136
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/CertifyKeySpinner.java
@@ -0,0 +1,60 @@
+package org.sufficientlysecure.keychain.ui.widget;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.support.v4.content.CursorLoader;
+import android.support.v4.content.Loader;
+import android.util.AttributeSet;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.provider.KeychainContract;
+import org.sufficientlysecure.keychain.provider.KeychainDatabase;
+
+public class CertifyKeySpinner extends KeySpinner {
+    private long mHiddenMasterKeyId = Constants.key.none;
+
+    public CertifyKeySpinner(Context context) {
+        super(context);
+    }
+
+    public CertifyKeySpinner(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public CertifyKeySpinner(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public void setHiddenMasterKeyId(long hiddenMasterKeyId) {
+        this.mHiddenMasterKeyId = hiddenMasterKeyId;
+        reload();
+    }
+
+    @Override
+    public Loader<Cursor> onCreateLoader() {
+        // This is called when a new Loader needs to be created. This
+        // sample only has one Loader, so we don't care about the ID.
+        Uri baseUri = KeychainContract.KeyRings.buildUnifiedKeyRingsUri();
+
+        // These are the rows that we will retrieve.
+        String[] projection = new String[]{
+                KeychainContract.KeyRings._ID,
+                KeychainContract.KeyRings.MASTER_KEY_ID,
+                KeychainContract.KeyRings.KEY_ID,
+                KeychainContract.KeyRings.USER_ID,
+                KeychainContract.KeyRings.IS_EXPIRED,
+                KeychainContract.KeyRings.HAS_CERTIFY,
+                KeychainContract.KeyRings.HAS_ANY_SECRET
+        };
+
+        String where = KeychainContract.KeyRings.HAS_ANY_SECRET + " = 1 AND "
+                + KeychainContract.KeyRings.HAS_CERTIFY + " NOT NULL AND "
+                + KeychainContract.KeyRings.IS_REVOKED + " = 0 AND "
+                + KeychainContract.KeyRings.IS_EXPIRED + " = 0 AND " + KeychainDatabase.Tables.KEYS + "."
+                + KeychainContract.KeyRings.MASTER_KEY_ID + " != " + mHiddenMasterKeyId;
+
+        // Now create and return a CursorLoader that will take care of
+        // creating a Cursor for the data being displayed.
+        return new CursorLoader(getContext(), baseUri, projection, where, null, null);
+    }
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EncryptKeyCompletionView.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EncryptKeyCompletionView.java
index 20b9570bb..ceb3f665f 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EncryptKeyCompletionView.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/EncryptKeyCompletionView.java
@@ -111,7 +111,7 @@ public class EncryptKeyCompletionView extends TokenCompleteTextView {
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
         if (getContext() instanceof FragmentActivity) {
-            ((FragmentActivity) getContext()).getSupportLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {
+            ((FragmentActivity) getContext()).getSupportLoaderManager().initLoader(hashCode(), null, new LoaderManager.LoaderCallbacks<Cursor>() {
                 @Override
                 public Loader<Cursor> onCreateLoader(int id, Bundle args) {
                     // These are the rows that we will retrieve.
@@ -143,6 +143,8 @@ public class EncryptKeyCompletionView extends TokenCompleteTextView {
                     swapCursor(null);
                 }
             });
+        } else {
+            Log.e(Constants.TAG, "EncryptKeyCompletionView must be attached to a FragmentActivity, this is " + getContext().getClass());
         }
     }
 
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
new file mode 100644
index 000000000..b12029239
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/KeySpinner.java
@@ -0,0 +1,215 @@
+package org.sufficientlysecure.keychain.ui.widget;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.os.Bundle;
+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.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.BaseAdapter;
+import android.widget.Spinner;
+import android.widget.SpinnerAdapter;
+import android.widget.TextView;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.pgp.KeyRing;
+import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
+import org.sufficientlysecure.keychain.provider.KeychainContract;
+import org.sufficientlysecure.keychain.util.Log;
+
+public abstract class KeySpinner extends Spinner {
+    public interface OnKeyChangedListener {
+        public void onKeyChanged(long masterKeyId);
+    }
+
+    private long mSelectedKeyId;
+    private SelectKeyAdapter mAdapter = new SelectKeyAdapter();
+    private OnKeyChangedListener mListener;
+
+    public KeySpinner(Context context) {
+        super(context);
+        initView();
+    }
+
+    public KeySpinner(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        initView();
+    }
+
+    public KeySpinner(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        initView();
+    }
+
+    private void initView() {
+        setAdapter(mAdapter);
+        super.setOnItemSelectedListener(new OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+                if (mListener != null) {
+                    mListener.onKeyChanged(id);
+                }
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> parent) {
+                if (mListener != null) {
+                    mListener.onKeyChanged(Constants.key.none);
+                }
+            }
+        });
+    }
+
+    public abstract Loader<Cursor> onCreateLoader();
+
+    @Override
+    public void setOnItemSelectedListener(OnItemSelectedListener listener) {
+        throw new UnsupportedOperationException();
+    }
+
+    public void setOnKeyChangedListener(OnKeyChangedListener listener) {
+        mListener = listener;
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        reload();
+    }
+
+    public void reload() {
+        if (getContext() instanceof FragmentActivity) {
+            ((FragmentActivity) getContext()).getSupportLoaderManager().restartLoader(hashCode(), null, new LoaderManager.LoaderCallbacks<Cursor>() {
+                @Override
+                public Loader<Cursor> onCreateLoader(int id, Bundle args) {
+                    return KeySpinner.this.onCreateLoader();
+                }
+
+                @Override
+                public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
+                    mAdapter.swapCursor(data);
+                }
+
+                @Override
+                public void onLoaderReset(Loader<Cursor> loader) {
+                    mAdapter.swapCursor(null);
+                }
+            });
+        } else {
+            Log.e(Constants.TAG, "KeySpinner must be attached to FragmentActivity, this is " + getContext().getClass());
+        }
+    }
+
+    public long getSelectedKeyId() {
+        return mSelectedKeyId;
+    }
+
+    public void setSelectedKeyId(long selectedKeyId) {
+        this.mSelectedKeyId = selectedKeyId;
+    }
+
+    private class SelectKeyAdapter extends BaseAdapter implements SpinnerAdapter {
+        private CursorAdapter inner;
+        private int mIndexUserId;
+        private int mIndexKeyId;
+        private int mIndexMasterKeyId;
+
+        public SelectKeyAdapter() {
+            inner = new CursorAdapter(null, null, 0) {
+                @Override
+                public View newView(Context context, Cursor cursor, ViewGroup parent) {
+                    return View.inflate(getContext(), R.layout.keyspinner_key, null);
+                }
+
+                @Override
+                public void bindView(View view, Context context, Cursor cursor) {
+                    String[] userId = KeyRing.splitUserId(cursor.getString(mIndexUserId));
+                    ((TextView) view.findViewById(android.R.id.title)).setText(userId[2] == null ? userId[0] : (userId[0] + " (" + userId[2] + ")"));
+                    ((TextView) view.findViewById(android.R.id.text1)).setText(userId[1]);
+                    ((TextView) view.findViewById(android.R.id.text2)).setText(PgpKeyHelper.convertKeyIdToHex(cursor.getLong(mIndexKeyId)));
+                }
+
+                @Override
+                public long getItemId(int position) {
+                    try {
+                        return ((Cursor) getItem(position)).getLong(mIndexMasterKeyId);
+                    } catch (Exception e) {
+                        // This can happen on concurrent modification :(
+                        return Constants.key.none;
+                    }
+                }
+            };
+        }
+
+        public Cursor swapCursor(Cursor newCursor) {
+            if (newCursor == null) return inner.swapCursor(null);
+
+            mIndexKeyId = newCursor.getColumnIndex(KeychainContract.KeyRings.KEY_ID);
+            mIndexUserId = newCursor.getColumnIndex(KeychainContract.KeyRings.USER_ID);
+            mIndexMasterKeyId = newCursor.getColumnIndex(KeychainContract.KeyRings.MASTER_KEY_ID);
+            if (newCursor.moveToFirst()) {
+                do {
+                    if (newCursor.getLong(mIndexMasterKeyId) == mSelectedKeyId) {
+                        setSelection(newCursor.getPosition() + 1);
+                    }
+                } while (newCursor.moveToNext());
+            }
+            return inner.swapCursor(newCursor);
+        }
+
+        @Override
+        public int getCount() {
+            return inner.getCount() + 1;
+        }
+
+        @Override
+        public Object getItem(int position) {
+            if (position == 0) return null;
+            return inner.getItem(position - 1);
+        }
+
+        @Override
+        public long getItemId(int position) {
+            if (position == 0) return Constants.key.none;
+            return inner.getItemId(position - 1);
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            try {
+                View v = getDropDownView(position, convertView, parent);
+                v.findViewById(android.R.id.text1).setVisibility(View.GONE);
+                return v;
+            } catch (NullPointerException e) {
+                // This is for the preview...
+                return View.inflate(getContext(), android.R.layout.simple_list_item_1, null);
+            }
+        }
+
+        @Override
+        public View getDropDownView(int position, View convertView, ViewGroup parent) {
+            View v;
+            if (position == 0) {
+                if (convertView == null) {
+                    v = inner.newView(null, null, parent);
+                } else {
+                    v = convertView;
+                }
+                ((TextView) v.findViewById(android.R.id.title)).setText("None");
+                v.findViewById(android.R.id.text1).setVisibility(View.GONE);
+                v.findViewById(android.R.id.text2).setVisibility(View.GONE);
+            } else {
+                v = inner.getView(position - 1, convertView, parent);
+                v.findViewById(android.R.id.text1).setVisibility(View.VISIBLE);
+                v.findViewById(android.R.id.text2).setVisibility(View.VISIBLE);
+            }
+            return v;
+        }
+    }
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/SignKeySpinner.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/SignKeySpinner.java
new file mode 100644
index 000000000..cbec7f920
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/SignKeySpinner.java
@@ -0,0 +1,48 @@
+package org.sufficientlysecure.keychain.ui.widget;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.support.v4.content.CursorLoader;
+import android.support.v4.content.Loader;
+import android.util.AttributeSet;
+import org.sufficientlysecure.keychain.provider.KeychainContract;
+
+public class SignKeySpinner extends KeySpinner {
+    public SignKeySpinner(Context context) {
+        super(context);
+    }
+
+    public SignKeySpinner(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public SignKeySpinner(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    public Loader<Cursor> onCreateLoader() {
+        // This is called when a new Loader needs to be created. This
+        // sample only has one Loader, so we don't care about the ID.
+        Uri baseUri = KeychainContract.KeyRings.buildUnifiedKeyRingsUri();
+
+        // These are the rows that we will retrieve.
+        String[] projection = new String[]{
+                KeychainContract.KeyRings._ID,
+                KeychainContract.KeyRings.MASTER_KEY_ID,
+                KeychainContract.KeyRings.KEY_ID,
+                KeychainContract.KeyRings.USER_ID,
+                KeychainContract.KeyRings.IS_EXPIRED,
+                KeychainContract.KeyRings.HAS_SIGN,
+                KeychainContract.KeyRings.HAS_ANY_SECRET
+        };
+
+        String where = KeychainContract.KeyRings.HAS_ANY_SECRET + " = 1 AND " + KeychainContract.KeyRings.HAS_SIGN + " NOT NULL AND "
+                + KeychainContract.KeyRings.IS_REVOKED + " = 0 AND " + KeychainContract.KeyRings.IS_EXPIRED + " = 0";
+
+        // Now create and return a CursorLoader that will take care of
+        // creating a Cursor for the data being displayed.
+        return new CursorLoader(getContext(), baseUri, projection, where, null, null);
+    }
+}