From 45d760008cddaa1125027edbc8a65b6df86e28f1 Mon Sep 17 00:00:00 2001
From: Dominik <dominik@dominikschuermann.de>
Date: Mon, 10 Sep 2012 11:13:32 +0200
Subject: externalized import, export, started working on qr code import

---
 org_apg/res/layout/import_from_qr_code.xml         |  63 ++++
 org_apg/res/values/strings.xml                     |  89 +++---
 .../org/thialfihar/android/apg/ApgApplication.java |   7 +
 org_apg/src/org/thialfihar/android/apg/Id.java     |   2 +-
 .../thialfihar/android/apg/helper/OtherHelper.java |  28 +-
 .../thialfihar/android/apg/helper/PGPHelper.java   |  40 ++-
 .../org/thialfihar/android/apg/helper/PGPMain.java |   4 +-
 .../thialfihar/android/apg/service/ApgService.java | 121 +++++++-
 .../thialfihar/android/apg/ui/DecryptActivity.java |   2 +-
 .../android/apg/ui/ImportFromQRCodeActivity.java   | 148 +++++-----
 .../thialfihar/android/apg/ui/KeyListActivity.java | 324 +++++++++------------
 .../android/apg/ui/MailListActivity.java           | 212 --------------
 .../thialfihar/android/apg/ui/MainActivity.java    |   6 -
 .../android/apg/ui/SecretKeyListActivity.java      |  63 ++--
 .../apg/ui/dialog/DeleteKeyDialogFragment.java     | 130 +++++++++
 .../ui/dialog/LookupUnknownKeyDialogFragment.java  | 133 +++++++++
 16 files changed, 813 insertions(+), 559 deletions(-)
 create mode 100644 org_apg/res/layout/import_from_qr_code.xml
 delete mode 100644 org_apg/src/org/thialfihar/android/apg/ui/MailListActivity.java
 create mode 100644 org_apg/src/org/thialfihar/android/apg/ui/dialog/DeleteKeyDialogFragment.java
 create mode 100644 org_apg/src/org/thialfihar/android/apg/ui/dialog/LookupUnknownKeyDialogFragment.java

diff --git a/org_apg/res/layout/import_from_qr_code.xml b/org_apg/res/layout/import_from_qr_code.xml
new file mode 100644
index 000000000..54f4355b3
--- /dev/null
+++ b/org_apg/res/layout/import_from_qr_code.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_centerHorizontal="true" >
+
+    <LinearLayout
+        android:id="@+id/import_from_qr_code_footer"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:orientation="vertical"
+        android:paddingLeft="10dp"
+        android:paddingRight="10dp" >
+        
+        
+        <Button
+            android:id="@+id/import_from_qr_code_import"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/import_from_qr_code_import" />
+
+        <Button
+            android:id="@+id/import_from_qr_code_import_sign_and_upload"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/import_from_qr_code_import_sign_and_upload" />
+
+        <Button
+            android:id="@+id/import_from_qr_code_scan_again"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/import_from_qr_code_scan_again" />
+
+        <Button
+            android:id="@+id/import_from_qr_code_finish"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/import_from_qr_code_finish" />
+    </LinearLayout>
+
+    <ScrollView
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        android:layout_above="@id/import_from_qr_code_footer"
+        android:fillViewport="true" >
+
+        <LinearLayout
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:paddingLeft="10dp"
+            android:paddingRight="10dp" >
+
+            <TextView
+                android:id="@+id/import_from_qr_code_content"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="" />
+        </LinearLayout>
+    </ScrollView>
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/org_apg/res/values/strings.xml b/org_apg/res/values/strings.xml
index 25cf6d190..46cb781f7 100644
--- a/org_apg/res/values/strings.xml
+++ b/org_apg/res/values/strings.xml
@@ -34,7 +34,7 @@
     <string name="title_keyServerPreference">Key Server Preference</string>
     <string name="title_changePassPhrase">Change Passphrase</string>
     <string name="title_setPassPhrase">Set Passphrase</string>
-    <string name="title_sendEmail">"Send Mail..."</string>
+    <string name="title_sendEmail">"Send Mail…"</string>
     <string name="title_encryptToFile">Encrypt To File</string>
     <string name="title_decryptToFile">Decrypt To File</string>
     <string name="title_importKeys">Import Keys</string>
@@ -100,7 +100,7 @@
     <string name="menu_keyServer">Key Server</string>
     <string name="menu_updateKey">Update</string>
     <string name="menu_exportKeyToServer">Export To Server</string>
-    <string name="menu_share">Share with QR Code</string>
+    <string name="menu_share">Share public key with QR Code</string>
     <string name="menu_scanQRCode">Scan QR Code</string>
     <string name="menu_signKey">Sign Key</string>
 
@@ -173,10 +173,10 @@
     <string name="dsa">DSA</string>
     <string name="elgamal">ElGamal</string>
     <string name="rsa">RSA</string>
-    <string name="filemanager_titleOpen">Open...</string>
-    <string name="filemanager_titleSave">Save As...</string>
-    <string name="filemanager_titleEncrypt">Select File To Encrypt...</string>
-    <string name="filemanager_titleDecrypt">Select File To Decrypt...</string>
+    <string name="filemanager_titleOpen">Open…</string>
+    <string name="filemanager_titleSave">Save As…</string>
+    <string name="filemanager_titleEncrypt">Select File To Encrypt…</string>
+    <string name="filemanager_titleDecrypt">Select File To Decrypt…</string>
     <string name="filemanager_btnOpen">Open</string>
     <string name="filemanager_btnSave">Save</string>
     <string name="warning">Warning</string>
@@ -260,41 +260,41 @@
     <string name="error_savingKeys">error saving some key(s)</string>
     <string name="error_couldNotExtractPrivateKey">could not extract private key</string>
 
-    <!-- progress_lowerCase: lowercase, phrases, usually ending in '...' -->
+    <!-- progress_lowerCase: lowercase, phrases, usually ending in '…' -->
     <string name="progress_done">done.</string>
-    <string name="progress_initializing">initializing...</string>
-    <string name="progress_saving">saving...</string>
-    <string name="progress_importing">importing...</string>
-    <string name="progress_exporting">exporting...</string>
-    <string name="progress_generating">generating key, this can take a while...</string>
-    <string name="progress_buildingKey">building key...</string>
-    <string name="progress_preparingMasterKey">preparing master key...</string>
-    <string name="progress_certifyingMasterKey">certifying master key...</string>
-    <string name="progress_buildingMasterKeyRing">building master key ring...</string>
-    <string name="progress_addingSubKeys">adding sub keys...</string>
-    <string name="progress_savingKeyRing">saving key ring...</string>
-    <string name="progress_importingSecretKeys">importing secret keys...</string>
-    <string name="progress_importingPublicKeys">importing public keys...</string>
-    <string name="progress_reloadingKeys">reloading keys...</string>
-    <string name="progress_exportingKey">exporting key...</string>
-    <string name="progress_exportingKeys">exporting keys...</string>
-    <string name="progress_extractingSignatureKey">extracting signature key...</string>
-    <string name="progress_extractingKey">extracting key...</string>
-    <string name="progress_preparingStreams">preparing streams...</string>
-    <string name="progress_encrypting">encrypting data...</string>
-    <string name="progress_decrypting">decrypting data...</string>
-    <string name="progress_preparingSignature">preparing signature...</string>
-    <string name="progress_generatingSignature">generating signature...</string>
-    <string name="progress_processingSignature">processing signature...</string>
-    <string name="progress_verifyingSignature">verifying signature...</string>
-    <string name="progress_signing">signing...</string>
-    <string name="progress_readingData">reading data...</string>
-    <string name="progress_findingKey">finding key...</string>
-    <string name="progress_decompressingData">decompressing data...</string>
-    <string name="progress_verifyingIntegrity">verifying integrity...</string>
-    <string name="progress_deletingSecurely">deleting \'%s\' securely...</string>
-    <string name="progress_querying">querying...</string>
-    <string name="progress_queryingServer">querying %s...</string>
+    <string name="progress_initializing">initializing…</string>
+    <string name="progress_saving">saving…</string>
+    <string name="progress_importing">importing…</string>
+    <string name="progress_exporting">exporting…</string>
+    <string name="progress_generating">generating key, this can take a while…</string>
+    <string name="progress_buildingKey">building key…</string>
+    <string name="progress_preparingMasterKey">preparing master key…</string>
+    <string name="progress_certifyingMasterKey">certifying master key…</string>
+    <string name="progress_buildingMasterKeyRing">building master key ring…</string>
+    <string name="progress_addingSubKeys">adding sub keys…</string>
+    <string name="progress_savingKeyRing">saving key ring…</string>
+    <string name="progress_importingSecretKeys">importing secret keys…</string>
+    <string name="progress_importingPublicKeys">importing public keys…</string>
+    <string name="progress_reloadingKeys">reloading keys…</string>
+    <string name="progress_exportingKey">exporting key…</string>
+    <string name="progress_exportingKeys">exporting keys…</string>
+    <string name="progress_extractingSignatureKey">extracting signature key…</string>
+    <string name="progress_extractingKey">extracting key…</string>
+    <string name="progress_preparingStreams">preparing streams…</string>
+    <string name="progress_encrypting">encrypting data…</string>
+    <string name="progress_decrypting">decrypting data…</string>
+    <string name="progress_preparingSignature">preparing signature…</string>
+    <string name="progress_generatingSignature">generating signature…</string>
+    <string name="progress_processingSignature">processing signature…</string>
+    <string name="progress_verifyingSignature">verifying signature…</string>
+    <string name="progress_signing">signing…</string>
+    <string name="progress_readingData">reading data…</string>
+    <string name="progress_findingKey">finding key…</string>
+    <string name="progress_decompressingData">decompressing data…</string>
+    <string name="progress_verifyingIntegrity">verifying integrity…</string>
+    <string name="progress_deletingSecurely">deleting \'%s\' securely…</string>
+    <string name="progress_querying">querying…</string>
+    <string name="progress_queryingServer">querying %s…</string>
 
     <!-- permission strings -->
     <string name="permission_read_key_details_label">Read key details from APG.</string>
@@ -316,7 +316,7 @@
     <string name="slow">slow</string>
     <string name="very_slow">very slow</string>
 
-    <!-- APG Fork -->
+    <!-- APG 2.0 -->
 
 
     <!-- Dashboard -->
@@ -333,4 +333,11 @@
     <string name="help_tab_about">About</string>
     <string name="help_about_version">Version:</string>
 
+    <!-- Import from QR Code -->
+
+    <string name="import_from_qr_code_import">Import key (only locally)</string>
+    <string name="import_from_qr_code_import_sign_and_upload">Import, Sign, and upload key</string>
+    <string name="import_from_qr_code_scan_again">Scan qr code again</string>
+    <string name="import_from_qr_code_finish">Finish</string>
+
 </resources>
\ No newline at end of file
diff --git a/org_apg/src/org/thialfihar/android/apg/ApgApplication.java b/org_apg/src/org/thialfihar/android/apg/ApgApplication.java
index 9a77efb74..ba9c9f08d 100644
--- a/org_apg/src/org/thialfihar/android/apg/ApgApplication.java
+++ b/org_apg/src/org/thialfihar/android/apg/ApgApplication.java
@@ -16,6 +16,9 @@
 
 package org.thialfihar.android.apg;
 
+import java.security.Security;
+
+import org.spongycastle.jce.provider.BouncyCastleProvider;
 import org.thialfihar.android.apg.helper.PGPMain;
 import org.thialfihar.android.apg.service.PassphraseCacheService;
 
@@ -23,6 +26,10 @@ import android.app.Application;
 
 public class ApgApplication extends Application {
 
+    static {
+        Security.addProvider(new BouncyCastleProvider());
+    }
+
     @Override
     public void onCreate() {
         super.onCreate();
diff --git a/org_apg/src/org/thialfihar/android/apg/Id.java b/org_apg/src/org/thialfihar/android/apg/Id.java
index bc40f59e6..4c83437a1 100644
--- a/org_apg/src/org/thialfihar/android/apg/Id.java
+++ b/org_apg/src/org/thialfihar/android/apg/Id.java
@@ -35,7 +35,7 @@ public final class Id {
         public static final int edit = 0x21070003;
         public static final int update = 0x21070004;
         public static final int exportToServer = 0x21070005;
-        public static final int share = 0x21070006;
+        public static final int share_qr_code = 0x21070006;
         public static final int signKey = 0x21070007;
 
         public static final class option {
diff --git a/org_apg/src/org/thialfihar/android/apg/helper/OtherHelper.java b/org_apg/src/org/thialfihar/android/apg/helper/OtherHelper.java
index 67b4d9c9f..516d7fccb 100644
--- a/org_apg/src/org/thialfihar/android/apg/helper/OtherHelper.java
+++ b/org_apg/src/org/thialfihar/android/apg/helper/OtherHelper.java
@@ -86,22 +86,26 @@ public class OtherHelper {
      */
     public static void logDebugBundle(Bundle bundle, String bundleName) {
         if (Constants.DEBUG) {
-            Set<String> ks = bundle.keySet();
-            Iterator<String> iterator = ks.iterator();
+            if (bundle != null) {
+                Set<String> ks = bundle.keySet();
+                Iterator<String> iterator = ks.iterator();
 
-            Log.d(Constants.TAG, "Bundle " + bundleName + ":");
-            Log.d(Constants.TAG, "------------------------------");
-            while (iterator.hasNext()) {
-                String key = iterator.next();
-                Object value = bundle.get(key);
+                Log.d(Constants.TAG, "Bundle " + bundleName + ":");
+                Log.d(Constants.TAG, "------------------------------");
+                while (iterator.hasNext()) {
+                    String key = iterator.next();
+                    Object value = bundle.get(key);
 
-                if (value != null) {
-                    Log.d(Constants.TAG, key + " : " + value.toString());
-                } else {
-                    Log.d(Constants.TAG, key + " : null");
+                    if (value != null) {
+                        Log.d(Constants.TAG, key + " : " + value.toString());
+                    } else {
+                        Log.d(Constants.TAG, key + " : null");
+                    }
                 }
+                Log.d(Constants.TAG, "------------------------------");
+            } else {
+                Log.d(Constants.TAG, "Bundle " + bundleName + ": null");
             }
-            Log.d(Constants.TAG, "------------------------------");
         }
     }
 }
diff --git a/org_apg/src/org/thialfihar/android/apg/helper/PGPHelper.java b/org_apg/src/org/thialfihar/android/apg/helper/PGPHelper.java
index 0b6191f67..6d5a07f56 100644
--- a/org_apg/src/org/thialfihar/android/apg/helper/PGPHelper.java
+++ b/org_apg/src/org/thialfihar/android/apg/helper/PGPHelper.java
@@ -17,6 +17,7 @@
 
 package org.thialfihar.android.apg.helper;
 
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Calendar;
@@ -24,6 +25,7 @@ import java.util.Date;
 import java.util.GregorianCalendar;
 import java.util.Vector;
 
+import org.spongycastle.bcpg.ArmoredOutputStream;
 import org.spongycastle.bcpg.sig.KeyFlags;
 import org.spongycastle.openpgp.PGPKeyRing;
 import org.spongycastle.openpgp.PGPObjectFactory;
@@ -34,8 +36,10 @@ import org.spongycastle.openpgp.PGPSecretKeyRing;
 import org.spongycastle.openpgp.PGPSignature;
 import org.spongycastle.openpgp.PGPSignatureSubpacketVector;
 import org.spongycastle.openpgp.PGPUtil;
+import org.thialfihar.android.apg.Constants;
 import org.thialfihar.android.apg.R;
 import org.thialfihar.android.apg.util.IterableIterator;
+import org.thialfihar.android.apg.util.Log;
 
 import android.content.Context;
 
@@ -186,7 +190,7 @@ public class PGPHelper {
     }
 
     public static PGPPublicKey getEncryptPublicKey(long masterKeyId) {
-        //TODO: externalize getSecretKeyRing from PGPWrapper into a DatabaseHelper
+        // TODO: externalize getSecretKeyRing from PGPWrapper into a DatabaseHelper
         PGPPublicKeyRing keyRing = PGPMain.getPublicKeyRing(masterKeyId);
         if (keyRing == null) {
             return null;
@@ -199,7 +203,7 @@ public class PGPHelper {
     }
 
     public static PGPSecretKey getSigningKey(long masterKeyId) {
-        //TODO: externalize getSecretKeyRing from PGPWrapper into a DatabaseHelper
+        // TODO: externalize getSecretKeyRing from PGPWrapper into a DatabaseHelper
         PGPSecretKeyRing keyRing = PGPMain.getSecretKeyRing(masterKeyId);
         if (keyRing == null) {
             return null;
@@ -380,12 +384,42 @@ public class PGPHelper {
 
     }
 
+    public static String getPubkeyAsArmoredString(long keyId) {
+        PGPPublicKey key = PGPMain.getPublicKey(keyId);
+        // if it is no public key get it from your own keys...
+        if (key == null) {
+            PGPSecretKey secretKey = PGPMain.getSecretKey(keyId);
+            if (secretKey == null) {
+                Log.e(Constants.TAG, "Key could not be found!");
+                return null;
+            }
+            key = secretKey.getPublicKey();
+        }
+
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        ArmoredOutputStream aos = new ArmoredOutputStream(bos);
+        String armouredKey = null;
+        try {
+            aos.write(key.getEncoded());
+            aos.close();
+
+            armouredKey = bos.toString("UTF-8");
+        } catch (IOException e) {
+            Log.e(Constants.TAG, "Problems while encoding key as armored string", e);
+        }
+
+        Log.d(Constants.TAG, "key:" + armouredKey);
+
+        return armouredKey;
+    }
+
     public static String getFingerPrint(long keyId) {
         PGPPublicKey key = PGPMain.getPublicKey(keyId);
         if (key == null) {
             PGPSecretKey secretKey = PGPMain.getSecretKey(keyId);
             if (secretKey == null) {
-                return "";
+                Log.e(Constants.TAG, "Key could not be found!");
+                return null;
             }
             key = secretKey.getPublicKey();
         }
diff --git a/org_apg/src/org/thialfihar/android/apg/helper/PGPMain.java b/org_apg/src/org/thialfihar/android/apg/helper/PGPMain.java
index 00e9e707d..3fcbeb7a7 100644
--- a/org_apg/src/org/thialfihar/android/apg/helper/PGPMain.java
+++ b/org_apg/src/org/thialfihar/android/apg/helper/PGPMain.java
@@ -662,7 +662,7 @@ public class PGPMain {
         }
     }
 
-    public static Bundle importKeyRings(Activity context, int type, InputData data,
+    public static Bundle importKeyRings(Context context, int type, InputData data,
             ProgressDialogUpdater progress) throws GeneralException, FileNotFoundException,
             PGPException, IOException {
         Bundle returnData = new Bundle();
@@ -733,7 +733,7 @@ public class PGPMain {
         return returnData;
     }
 
-    public static Bundle exportKeyRings(Activity context, Vector<Integer> keyRingIds,
+    public static Bundle exportKeyRings(Context context, Vector<Integer> keyRingIds,
             OutputStream outStream, ProgressDialogUpdater progress) throws GeneralException,
             FileNotFoundException, PGPException, IOException {
         Bundle returnData = new Bundle();
diff --git a/org_apg/src/org/thialfihar/android/apg/service/ApgService.java b/org_apg/src/org/thialfihar/android/apg/service/ApgService.java
index b6811d2ee..901097bbc 100644
--- a/org_apg/src/org/thialfihar/android/apg/service/ApgService.java
+++ b/org_apg/src/org/thialfihar/android/apg/service/ApgService.java
@@ -26,6 +26,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
+import java.util.Vector;
 
 import org.spongycastle.openpgp.PGPSecretKey;
 import org.spongycastle.openpgp.PGPSecretKeyRing;
@@ -66,7 +67,7 @@ public class ApgService extends IntentService implements ProgressDialogUpdater {
 
     /* keys for data bundle */
 
-    // encrypt and decrypt
+    // encrypt, decrypt, import export
     public static final String TARGET = "target";
     // possible targets:
     public static final int TARGET_BYTES = 1;
@@ -91,7 +92,7 @@ public class ApgService extends IntentService implements ProgressDialogUpdater {
     public static final String RETURN_BYTES = "returnBinary";
     public static final String CIPHERTEXT_BYTES = "ciphertextBytes";
     public static final String ASSUME_SYMMETRIC = "assumeSymmetric";
-    public static final String LOOKUP_UNKNOWN_KEY = "lookup_unknown_key";
+    public static final String LOOKUP_UNKNOWN_KEY = "lookupUnknownKey";
 
     // edit keys
     public static final String NEW_PASSPHRASE = "newPassphrase";
@@ -103,13 +104,26 @@ public class ApgService extends IntentService implements ProgressDialogUpdater {
 
     // generate key
     public static final String ALGORITHM = "algorithm";
-    public static final String KEY_SIZE = "key_size";
+    public static final String KEY_SIZE = "keySize";
     public static final String SYMMETRIC_PASSPHRASE = "passphrase";
     public static final String MASTER_KEY = "masterKey";
 
     // delete file securely
     public static final String DELETE_FILE = "deleteFile";
 
+    // import key
+    public static final String IMPORT_INPUT_STREAM = "importInputStream";
+    public static final String IMPORT_FILENAME = "importFilename";
+    public static final String IMPORT_BYTES = "importBytes";
+    public static final String IMPORT_KEY_TYPE = "importKeyType";
+
+    // export key
+    public static final String EXPORT_OUTPUT_STREAM = "exportOutputStream";
+    public static final String EXPORT_FILENAME = "exportFilename";
+    public static final String EXPORT_KEY_TYPE = "exportKeyType";
+    public static final String EXPORT_ALL = "exportAll";
+    public static final String EXPORT_KEY_RING_ID = "exportKeyRingId";
+
     /* possible EXTRA_ACTIONs */
     public static final int ACTION_ENCRYPT_SIGN = 10;
 
@@ -121,6 +135,9 @@ public class ApgService extends IntentService implements ProgressDialogUpdater {
 
     public static final int ACTION_DELETE_FILE_SECURELY = 40;
 
+    public static final int ACTION_IMPORT_KEY = 50;
+    public static final int ACTION_EXPORT_KEY = 51;
+
     /* possible data keys as result send over messenger */
     // keys
     public static final String RESULT_NEW_KEY = "newKey";
@@ -580,6 +597,104 @@ public class ApgService extends IntentService implements ProgressDialogUpdater {
 
             break;
 
+        case ACTION_IMPORT_KEY:
+            try {
+
+                /* Input */
+                int target = data.getInt(TARGET);
+
+                int keyType = Id.type.public_key;
+                if (data.containsKey(IMPORT_KEY_TYPE)) {
+                    keyType = data.getInt(IMPORT_KEY_TYPE);
+                }
+
+                /* Operation */
+                InputStream inStream = null;
+                long inLength = -1;
+                InputData inputData = null;
+                switch (target) {
+                case TARGET_BYTES: /* import key from bytes directly */
+                    byte[] bytes = data.getByteArray(IMPORT_BYTES);
+
+                    inStream = new ByteArrayInputStream(bytes);
+                    inLength = bytes.length;
+
+                    inputData = new InputData(inStream, inLength);
+
+                    break;
+                case TARGET_FILE: /* import key from file */
+                    String inputFile = data.getString(IMPORT_FILENAME);
+
+                    inStream = new FileInputStream(inputFile);
+                    File file = new File(inputFile);
+                    inLength = file.length();
+                    inputData = new InputData(inStream, inLength);
+
+                    break;
+
+                case TARGET_STREAM:
+                    // TODO: not implemented
+                    break;
+                }
+
+                Bundle resultData = new Bundle();
+                resultData = PGPMain.importKeyRings(this, keyType, inputData, this);
+
+                sendMessageToHandler(ApgHandler.MESSAGE_OKAY, resultData);
+            } catch (Exception e) {
+                sendErrorToHandler(e);
+            }
+
+            break;
+
+        case ACTION_EXPORT_KEY:
+            try {
+
+                /* Input */
+                int keyType = Id.type.public_key;
+                if (data.containsKey(EXPORT_KEY_TYPE)) {
+                    keyType = data.getInt(EXPORT_KEY_TYPE);
+                }
+
+                String outputFile = data.getString(EXPORT_FILENAME);
+
+                boolean exportAll = data.getBoolean(EXPORT_ALL);
+                int keyRingId = -1;
+                if (!exportAll) {
+                    keyRingId = data.getInt(EXPORT_KEY_RING_ID);
+                }
+
+                /* Operation */
+
+                // check if storage is ready
+                if (!FileHelper.isStorageMounted(outputFile)) {
+                    sendErrorToHandler(new GeneralException(
+                            getString(R.string.error_externalStorageNotReady)));
+                    return;
+                }
+
+                // OutputStream
+                FileOutputStream outStream = new FileOutputStream(outputFile);
+
+                Vector<Integer> keyRingIds = new Vector<Integer>();
+                if (exportAll) {
+                    keyRingIds = PGPMain
+                            .getKeyRingIds(keyType == Id.type.public_key ? Id.database.type_public
+                                    : Id.database.type_secret);
+                } else {
+                    keyRingIds.add(keyRingId);
+                }
+
+                Bundle resultData = new Bundle();
+                resultData = PGPMain.exportKeyRings(this, keyRingIds, outStream, this);
+
+                sendMessageToHandler(ApgHandler.MESSAGE_OKAY, resultData);
+            } catch (Exception e) {
+                sendErrorToHandler(e);
+            }
+
+            break;
+
         default:
             break;
         }
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/DecryptActivity.java b/org_apg/src/org/thialfihar/android/apg/ui/DecryptActivity.java
index ee6ad5af8..53b0ed029 100644
--- a/org_apg/src/org/thialfihar/android/apg/ui/DecryptActivity.java
+++ b/org_apg/src/org/thialfihar/android/apg/ui/DecryptActivity.java
@@ -693,7 +693,7 @@ public class DecryptActivity extends SherlockFragmentActivity {
     private void decryptStart() {
         Log.d(Constants.TAG, "decryptStart");
 
-        // Send all information needed to service to edit key in other thread
+        // Send all information needed to service to decrypt in other thread
         Intent intent = new Intent(this, ApgService.class);
 
         // fill values for this action
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/ImportFromQRCodeActivity.java b/org_apg/src/org/thialfihar/android/apg/ui/ImportFromQRCodeActivity.java
index 5d70e6924..0b751f66c 100644
--- a/org_apg/src/org/thialfihar/android/apg/ui/ImportFromQRCodeActivity.java
+++ b/org_apg/src/org/thialfihar/android/apg/ui/ImportFromQRCodeActivity.java
@@ -33,6 +33,8 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.os.Message;
 import org.thialfihar.android.apg.util.Log;
+
+import android.widget.TextView;
 import android.widget.Toast;
 
 import com.google.zxing.integration.android.IntentIntegrator;
@@ -61,86 +63,98 @@ public class ImportFromQRCodeActivity extends BaseActivity {
         new IntentIntegrator(this).initiateScan();
     }
 
+    // private void importAndSignOld(final long keyId, final String expectedFingerprint) {
+    // if (expectedFingerprint != null && expectedFingerprint.length() > 0) {
+    //
+    // Thread t = new Thread() {
+    // @Override
+    // public void run() {
+    // try {
+    // // TODO: display some sort of spinner here while the user waits
+    //
+    // // TODO: there should be only 1
+    // HkpKeyServer server = new HkpKeyServer(mPreferences.getKeyServers()[0]);
+    // String encodedKey = server.get(keyId);
+    //
+    // PGPKeyRing keyring = PGPHelper.decodeKeyRing(new ByteArrayInputStream(
+    // encodedKey.getBytes()));
+    // if (keyring != null && keyring instanceof PGPPublicKeyRing) {
+    // PGPPublicKeyRing publicKeyRing = (PGPPublicKeyRing) keyring;
+    //
+    // // make sure the fingerprints match before we cache this thing
+    // String actualFingerprint = PGPHelper.convertToHex(publicKeyRing
+    // .getPublicKey().getFingerprint());
+    // if (expectedFingerprint.equals(actualFingerprint)) {
+    // // store the signed key in our local cache
+    // int retval = PGPMain.storeKeyRingInCache(publicKeyRing);
+    // if (retval != Id.return_value.ok
+    // && retval != Id.return_value.updated) {
+    // status.putString(EXTRA_ERROR,
+    // "Failed to store signed key in local cache");
+    // } else {
+    // Intent intent = new Intent(ImportFromQRCodeActivity.this,
+    // SignKeyActivity.class);
+    // intent.putExtra(EXTRA_KEY_ID, keyId);
+    // startActivityForResult(intent, Id.request.sign_key);
+    // }
+    // } else {
+    // status.putString(
+    // EXTRA_ERROR,
+    // "Scanned fingerprint does NOT match the fingerprint of the received key.  You shouldnt trust this key.");
+    // }
+    // }
+    // } catch (QueryException e) {
+    // Log.e(TAG, "Failed to query KeyServer", e);
+    // status.putString(EXTRA_ERROR, "Failed to query KeyServer");
+    // status.putInt(Constants.extras.STATUS, Id.message.done);
+    // } catch (IOException e) {
+    // Log.e(TAG, "Failed to query KeyServer", e);
+    // status.putString(EXTRA_ERROR, "Failed to query KeyServer");
+    // status.putInt(Constants.extras.STATUS, Id.message.done);
+    // }
+    // }
+    // };
+    //
+    // t.setName("KeyExchange Download Thread");
+    // t.setDaemon(true);
+    // t.start();
+    // }
+    // }
+
     private void importAndSign(final long keyId, final String expectedFingerprint) {
-        if (expectedFingerprint != null && expectedFingerprint.length() > 0) {
-
-            Thread t = new Thread() {
-                @Override
-                public void run() {
-                    try {
-                        // TODO: display some sort of spinner here while the user waits
-
-                        // TODO: there should be only 1
-                        HkpKeyServer server = new HkpKeyServer(mPreferences.getKeyServers()[0]);
-                        String encodedKey = server.get(keyId);
-
-                        PGPKeyRing keyring = PGPHelper.decodeKeyRing(new ByteArrayInputStream(
-                                encodedKey.getBytes()));
-                        if (keyring != null && keyring instanceof PGPPublicKeyRing) {
-                            PGPPublicKeyRing publicKeyRing = (PGPPublicKeyRing) keyring;
-
-                            // make sure the fingerprints match before we cache this thing
-                            String actualFingerprint = PGPHelper.convertToHex(publicKeyRing
-                                    .getPublicKey().getFingerprint());
-                            if (expectedFingerprint.equals(actualFingerprint)) {
-                                // store the signed key in our local cache
-                                int retval = PGPMain.storeKeyRingInCache(publicKeyRing);
-                                if (retval != Id.return_value.ok
-                                        && retval != Id.return_value.updated) {
-                                    status.putString(EXTRA_ERROR,
-                                            "Failed to store signed key in local cache");
-                                } else {
-                                    Intent intent = new Intent(ImportFromQRCodeActivity.this,
-                                            SignKeyActivity.class);
-                                    intent.putExtra(EXTRA_KEY_ID, keyId);
-                                    startActivityForResult(intent, Id.request.sign_key);
-                                }
-                            } else {
-                                status.putString(
-                                        EXTRA_ERROR,
-                                        "Scanned fingerprint does NOT match the fingerprint of the received key.  You shouldnt trust this key.");
-                            }
-                        }
-                    } catch (QueryException e) {
-                        Log.e(TAG, "Failed to query KeyServer", e);
-                        status.putString(EXTRA_ERROR, "Failed to query KeyServer");
-                        status.putInt(Constants.extras.STATUS, Id.message.done);
-                    } catch (IOException e) {
-                        Log.e(TAG, "Failed to query KeyServer", e);
-                        status.putString(EXTRA_ERROR, "Failed to query KeyServer");
-                        status.putInt(Constants.extras.STATUS, Id.message.done);
-                    }
-                }
-            };
-
-            t.setName("KeyExchange Download Thread");
-            t.setDaemon(true);
-            t.start();
-        }
+
+        // setContentView(R.layout.import_from_qr_code);
+
     }
 
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         switch (requestCode) {
         case IntentIntegrator.REQUEST_CODE: {
-            boolean debug = true; // TODO: remove this!!!
             IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode,
                     data);
-            if (debug || (scanResult != null && scanResult.getFormatName() != null)) {
-                String[] bits = debug ? new String[] { "5993515643896327656",
-                        "0816 F68A 6816 68FB 01BF  2CA5 532D 3EB9 1E2F EDE8" } : scanResult
-                        .getContents().split(",");
-                if (bits.length != 2) {
-                    return; // dont know how to handle this. Not a valid code
-                }
+            if (scanResult != null && scanResult.getFormatName() != null) {
 
-                long keyId = Long.parseLong(bits[0]);
-                String expectedFingerprint = bits[1];
+                // show layout
+                setContentView(R.layout.import_from_qr_code);
+                TextView contentView = (TextView) findViewById(R.id.import_from_qr_code_content);
 
-                importAndSign(keyId, expectedFingerprint);
+                String content = scanResult.getContents();
+
+                contentView.setText(content);
+                // String[] bits = scanResult.getContents().split(",");
+                // if (bits.length != 2) {
+                // return; // dont know how to handle this. Not a valid code
+                // }
+                //
+                // long keyId = Long.parseLong(bits[0]);
+                // String expectedFingerprint = bits[1];
+
+                // importAndSign(keyId, expectedFingerprint);
 
-                break;
             }
+
+            break;
         }
 
         case Id.request.sign_key: {
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/KeyListActivity.java b/org_apg/src/org/thialfihar/android/apg/ui/KeyListActivity.java
index 97449d316..1d41ab696 100644
--- a/org_apg/src/org/thialfihar/android/apg/ui/KeyListActivity.java
+++ b/org_apg/src/org/thialfihar/android/apg/ui/KeyListActivity.java
@@ -16,9 +16,6 @@
 
 package org.thialfihar.android.apg.ui;
 
-import org.spongycastle.openpgp.PGPException;
-import org.spongycastle.openpgp.PGPPublicKeyRing;
-import org.spongycastle.openpgp.PGPSecretKeyRing;
 import org.thialfihar.android.apg.Constants;
 import org.thialfihar.android.apg.Id;
 import org.thialfihar.android.apg.helper.PGPHelper;
@@ -26,14 +23,19 @@ import org.thialfihar.android.apg.helper.PGPMain;
 import org.thialfihar.android.apg.provider.KeyRings;
 import org.thialfihar.android.apg.provider.Keys;
 import org.thialfihar.android.apg.provider.UserIds;
+import org.thialfihar.android.apg.service.ApgHandler;
+import org.thialfihar.android.apg.service.ApgService;
+import org.thialfihar.android.apg.ui.dialog.DeleteFileDialogFragment;
+import org.thialfihar.android.apg.ui.dialog.DeleteKeyDialogFragment;
 import org.thialfihar.android.apg.ui.dialog.FileDialogFragment;
-import org.thialfihar.android.apg.util.InputData;
+import org.thialfihar.android.apg.ui.dialog.ProgressDialogFragment;
 import org.thialfihar.android.apg.R;
 
+import com.actionbarsherlock.app.SherlockFragmentActivity;
 import com.actionbarsherlock.view.MenuItem;
 
 import android.app.AlertDialog;
-import android.app.Dialog;
+import android.app.ProgressDialog;
 import android.app.SearchManager;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -59,25 +61,14 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import java.io.ByteArrayInputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
 import java.util.Vector;
 
-public class KeyListActivity extends BaseActivity {
+public class KeyListActivity extends SherlockFragmentActivity {
 
     public static final String ACTION_IMPORT = Constants.INTENT_PREFIX + "IMPORT";
 
     public static final String EXTRA_TEXT = "text";
 
-    // TODO: remove when using new intentservice:
-    public static final String EXTRA_ERROR = "error";
-
     protected ExpandableListView mList;
     protected KeyListAdapter mListAdapter;
     protected View mFilterLayout;
@@ -251,7 +242,7 @@ public class KeyListActivity extends BaseActivity {
 
         case Id.menu.delete: {
             mSelectedItem = groupPosition;
-            showDialog(Id.dialog.delete_key);
+            showDeleteKeyDialog();
             return true;
         }
 
@@ -261,177 +252,87 @@ public class KeyListActivity extends BaseActivity {
         }
     }
 
-    @Override
-    protected Dialog onCreateDialog(int id) {
+    private void showDeleteKeyDialog() {
+        final int keyRingId = mListAdapter.getKeyRingId(mSelectedItem);
+        mSelectedItem = -1;
 
-        switch (id) {
-        case Id.dialog.delete_key: {
-            final int keyRingId = mListAdapter.getKeyRingId(mSelectedItem);
-            mSelectedItem = -1;
-            // TODO: better way to do this?
-            String userId = "<unknown>";
-            Object keyRing = PGPMain.getKeyRing(keyRingId);
-            if (keyRing != null) {
-                if (keyRing instanceof PGPPublicKeyRing) {
-                    userId = PGPHelper.getMainUserIdSafe(this,
-                            PGPHelper.getMasterKey((PGPPublicKeyRing) keyRing));
-                } else {
-                    userId = PGPHelper.getMainUserIdSafe(this,
-                            PGPHelper.getMasterKey((PGPSecretKeyRing) keyRing));
+        // Message is received after key is deleted
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                if (message.what == DeleteKeyDialogFragment.MESSAGE_OKAY) {
+                    refreshList();
                 }
             }
+        };
 
-            AlertDialog.Builder builder = new AlertDialog.Builder(this);
-            builder.setTitle(R.string.warning);
-            builder.setMessage(getString(
-                    mKeyType == Id.type.public_key ? R.string.keyDeletionConfirmation
-                            : R.string.secretKeyDeletionConfirmation, userId));
-            builder.setIcon(android.R.drawable.ic_dialog_alert);
-            builder.setPositiveButton(R.string.btn_delete, new DialogInterface.OnClickListener() {
-                public void onClick(DialogInterface dialog, int id) {
-                    deleteKey(keyRingId);
-                    removeDialog(Id.dialog.delete_key);
-                }
-            });
-            builder.setNegativeButton(android.R.string.cancel,
-                    new DialogInterface.OnClickListener() {
-                        public void onClick(DialogInterface dialog, int id) {
-                            removeDialog(Id.dialog.delete_key);
-                        }
-                    });
-            return builder.create();
-        }
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(returnHandler);
 
-        default: {
-            return super.onCreateDialog(id);
-        }
-        }
+        DeleteKeyDialogFragment deleteKeyDialog = DeleteKeyDialogFragment.newInstance(messenger,
+                keyRingId, mKeyType);
+
+        deleteKeyDialog.show(getSupportFragmentManager(), "deleteKeyDialog");
     }
 
     public void importKeys() {
-        showDialog(Id.dialog.importing);
-        mTask = Id.task.import_keys;
-        startThread();
-    }
+        Log.d(Constants.TAG, "importKeys started");
 
-    public void exportKeys() {
-        showDialog(Id.dialog.exporting);
-        mTask = Id.task.export_keys;
-        startThread();
-    }
+        // Send all information needed to service to import key in other thread
+        Intent intent = new Intent(this, ApgService.class);
 
-    @Override
-    public void run() {
-        String error = null;
-        Bundle data = new Bundle();
-        Message msg = new Message();
-
-        try {
-            InputStream importInputStream = null;
-            OutputStream exportOutputStream = null;
-            long size = 0;
-            if (mTask == Id.task.import_keys) {
-                if (mImportData != null) {
-                    byte[] bytes = mImportData.getBytes();
-                    size = bytes.length;
-                    importInputStream = new ByteArrayInputStream(bytes);
-                } else {
-                    File file = new File(mImportFilename);
-                    size = file.length();
-                    importInputStream = new FileInputStream(file);
-                }
-            } else {
-                exportOutputStream = new FileOutputStream(mExportFilename);
-            }
+        intent.putExtra(ApgService.EXTRA_ACTION, ApgService.ACTION_IMPORT_KEY);
 
-            if (mTask == Id.task.import_keys) {
-                data = PGPMain.importKeyRings(this, mKeyType, new InputData(importInputStream,
-                        size), this);
-            } else {
-                Vector<Integer> keyRingIds = new Vector<Integer>();
-                if (mSelectedItem == -1) {
-                    keyRingIds = PGPMain
-                            .getKeyRingIds(mKeyType == Id.type.public_key ? Id.database.type_public
-                                    : Id.database.type_secret);
-                } else {
-                    int keyRingId = mListAdapter.getKeyRingId(mSelectedItem);
-                    keyRingIds.add(keyRingId);
-                    mSelectedItem = -1;
-                }
-                data = PGPMain.exportKeyRings(this, keyRingIds, exportOutputStream, this);
-            }
-        } catch (FileNotFoundException e) {
-            error = getString(R.string.error_fileNotFound);
-        } catch (IOException e) {
-            error = "" + e;
-        } catch (PGPException e) {
-            error = "" + e;
-        } catch (PGPMain.GeneralException e) {
-            error = "" + e;
-        }
+        // fill values for this action
+        Bundle data = new Bundle();
 
-        mImportData = null;
+        data.putInt(ApgService.IMPORT_KEY_TYPE, mKeyType);
 
-        if (mTask == Id.task.import_keys) {
-            data.putInt(Constants.extras.STATUS, Id.message.import_done);
+        if (mImportData != null) {
+            data.putInt(ApgService.TARGET, ApgService.TARGET_BYTES);
+            data.putByteArray(ApgService.IMPORT_BYTES, mImportData.getBytes());
         } else {
-            data.putInt(Constants.extras.STATUS, Id.message.export_done);
+            data.putInt(ApgService.TARGET, ApgService.TARGET_FILE);
+            data.putString(ApgService.IMPORT_FILENAME, mImportFilename);
         }
 
-        if (error != null) {
-            data.putString(EXTRA_ERROR, error);
-        }
+        intent.putExtra(ApgService.EXTRA_DATA, data);
 
-        msg.setData(data);
-        sendMessage(msg);
-    }
+        // create progress dialog
+        ProgressDialogFragment importingDialog = ProgressDialogFragment.newInstance(
+                R.string.progress_importing, ProgressDialog.STYLE_HORIZONTAL);
 
-    protected void deleteKey(int keyRingId) {
-        PGPMain.deleteKey(keyRingId);
-        refreshList();
-    }
+        // Message is received after importing is done in ApgService
+        ApgHandler saveHandler = new ApgHandler(this, importingDialog) {
+            public void handleMessage(Message message) {
+                // handle messages by standard ApgHandler first
+                super.handleMessage(message);
 
-    protected void refreshList() {
-        mListAdapter.rebuild(true);
-        mListAdapter.notifyDataSetChanged();
-    }
+                if (message.arg1 == ApgHandler.MESSAGE_OKAY) {
+                    // get returned data bundle
+                    Bundle returnData = message.getData();
 
-    @Override
-    public void doneCallback(Message msg) {
-        super.doneCallback(msg);
-
-        Bundle data = msg.getData();
-        if (data != null) {
-            int type = data.getInt(Constants.extras.STATUS);
-            switch (type) {
-            case Id.message.import_done: {
-                removeDialog(Id.dialog.importing);
-
-                String error = data.getString(EXTRA_ERROR);
-                if (error != null) {
-                    Toast.makeText(KeyListActivity.this, getString(R.string.errorMessage, error),
-                            Toast.LENGTH_SHORT).show();
-                } else {
-                    int added = data.getInt("added");
-                    int updated = data.getInt("updated");
-                    int bad = data.getInt("bad");
-                    String message;
+                    int added = returnData.getInt("added");
+                    int updated = returnData.getInt("updated");
+                    int bad = returnData.getInt("bad");
+                    String toastMessage;
                     if (added > 0 && updated > 0) {
-                        message = getString(R.string.keysAddedAndUpdated, added, updated);
+                        toastMessage = getString(R.string.keysAddedAndUpdated, added, updated);
                     } else if (added > 0) {
-                        message = getString(R.string.keysAdded, added);
+                        toastMessage = getString(R.string.keysAdded, added);
                     } else if (updated > 0) {
-                        message = getString(R.string.keysUpdated, updated);
+                        toastMessage = getString(R.string.keysUpdated, updated);
                     } else {
-                        message = getString(R.string.noKeysAddedOrUpdated);
+                        toastMessage = getString(R.string.noKeysAddedOrUpdated);
                     }
-                    Toast.makeText(KeyListActivity.this, message, Toast.LENGTH_SHORT).show();
+                    Toast.makeText(KeyListActivity.this, toastMessage, Toast.LENGTH_SHORT).show();
                     if (bad > 0) {
-                        AlertDialog.Builder alert = new AlertDialog.Builder(this);
+                        AlertDialog.Builder alert = new AlertDialog.Builder(KeyListActivity.this);
 
                         alert.setIcon(android.R.drawable.ic_dialog_alert);
                         alert.setTitle(R.string.warning);
-                        alert.setMessage(this.getString(R.string.badKeysEncountered, bad));
+                        alert.setMessage(KeyListActivity.this.getString(
+                                R.string.badKeysEncountered, bad));
 
                         alert.setPositiveButton(android.R.string.ok,
                                 new DialogInterface.OnClickListener() {
@@ -443,41 +344,94 @@ public class KeyListActivity extends BaseActivity {
                         alert.create().show();
                     } else if (mDeleteAfterImport) {
                         // everything went well, so now delete, if that was turned on
-                        setDeleteFile(mImportFilename);
-                        showDialog(Id.dialog.delete_file);
+                        DeleteFileDialogFragment deleteFileDialog = DeleteFileDialogFragment
+                                .newInstance(mImportFilename);
+                        deleteFileDialog.show(getSupportFragmentManager(), "deleteDialog");
                     }
+                    refreshList();
+
                 }
-                refreshList();
-                break;
-            }
+            };
+        };
 
-            case Id.message.export_done: {
-                removeDialog(Id.dialog.exporting);
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(saveHandler);
+        intent.putExtra(ApgService.EXTRA_MESSENGER, messenger);
 
-                String error = data.getString(EXTRA_ERROR);
-                if (error != null) {
-                    Toast.makeText(KeyListActivity.this, getString(R.string.errorMessage, error),
-                            Toast.LENGTH_SHORT).show();
-                } else {
-                    int exported = data.getInt("exported");
-                    String message;
+        // show progress dialog
+        importingDialog.show(getSupportFragmentManager(), "importingDialog");
+
+        // start service with intent
+        startService(intent);
+    }
+
+    public void exportKeys() {
+        Log.d(Constants.TAG, "exportKeys started");
+
+        // Send all information needed to service to export key in other thread
+        Intent intent = new Intent(this, ApgService.class);
+
+        intent.putExtra(ApgService.EXTRA_ACTION, ApgService.ACTION_EXPORT_KEY);
+
+        // fill values for this action
+        Bundle data = new Bundle();
+
+        data.putString(ApgService.EXPORT_FILENAME, mExportFilename);
+        data.putInt(ApgService.EXPORT_KEY_TYPE, mKeyType);
+
+        if (mSelectedItem == -1) {
+            data.putBoolean(ApgService.EXPORT_ALL, true);
+        } else {
+            int keyRingId = mListAdapter.getKeyRingId(mSelectedItem);
+            data.putInt(ApgService.EXPORT_KEY_RING_ID, keyRingId);
+            mSelectedItem = -1;
+        }
+
+        intent.putExtra(ApgService.EXTRA_DATA, data);
+
+        // create progress dialog
+        ProgressDialogFragment exportingDialog = ProgressDialogFragment.newInstance(
+                R.string.progress_exporting, ProgressDialog.STYLE_HORIZONTAL);
+
+        // Message is received after exporting is done in ApgService
+        ApgHandler exportHandler = new ApgHandler(this, exportingDialog) {
+            public void handleMessage(Message message) {
+                // handle messages by standard ApgHandler first
+                super.handleMessage(message);
+
+                if (message.arg1 == ApgHandler.MESSAGE_OKAY) {
+                    // get returned data bundle
+                    Bundle returnData = message.getData();
+
+                    int exported = returnData.getInt("exported");
+                    String toastMessage;
                     if (exported == 1) {
-                        message = getString(R.string.keyExported);
+                        toastMessage = getString(R.string.keyExported);
                     } else if (exported > 0) {
-                        message = getString(R.string.keysExported, exported);
+                        toastMessage = getString(R.string.keysExported, exported);
                     } else {
-                        message = getString(R.string.noKeysExported);
+                        toastMessage = getString(R.string.noKeysExported);
                     }
-                    Toast.makeText(KeyListActivity.this, message, Toast.LENGTH_SHORT).show();
+                    Toast.makeText(KeyListActivity.this, toastMessage, Toast.LENGTH_SHORT).show();
+
                 }
-                break;
-            }
+            };
+        };
 
-            default: {
-                break;
-            }
-            }
-        }
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(exportHandler);
+        intent.putExtra(ApgService.EXTRA_MESSENGER, messenger);
+
+        // show progress dialog
+        exportingDialog.show(getSupportFragmentManager(), "exportingDialog");
+
+        // start service with intent
+        startService(intent);
+    }
+
+    protected void refreshList() {
+        mListAdapter.rebuild(true);
+        mListAdapter.notifyDataSetChanged();
     }
 
     protected class KeyListAdapter extends BaseExpandableListAdapter {
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/MailListActivity.java b/org_apg/src/org/thialfihar/android/apg/ui/MailListActivity.java
deleted file mode 100644
index 85d9d6ce5..000000000
--- a/org_apg/src/org/thialfihar/android/apg/ui/MailListActivity.java
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.thialfihar.android.apg.ui;
-
-import java.util.Vector;
-import java.util.regex.Matcher;
-
-import org.thialfihar.android.apg.R;
-import org.thialfihar.android.apg.helper.PGPMain;
-import org.thialfihar.android.apg.helper.Preferences;
-
-import android.app.ListActivity;
-import android.content.Context;
-import android.content.Intent;
-import android.database.Cursor;
-import android.net.Uri;
-import android.os.Bundle;
-import android.text.Html;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.AdapterView;
-import android.widget.AdapterView.OnItemClickListener;
-import android.widget.BaseAdapter;
-import android.widget.ImageView;
-import android.widget.ListAdapter;
-import android.widget.TextView;
-
-public class MailListActivity extends ListActivity {
-    LayoutInflater mInflater = null;
-
-    public static final String EXTRA_ACCOUNT = "account";
-
-    private static class Conversation {
-        public long id;
-        public String subject;
-        public Vector<Message> messages;
-
-        public Conversation(long id, String subject) {
-            this.id = id;
-            this.subject = subject;
-        }
-    }
-
-    private static class Message {
-        public Conversation parent;
-        public long id;
-        public String subject;
-        public String fromAddress;
-        public String data;
-        public String replyTo;
-        public boolean signedOnly;
-
-        public Message(Conversation parent, long id, String subject, String fromAddress,
-                String replyTo, String data, boolean signedOnly) {
-            this.parent = parent;
-            this.id = id;
-            this.subject = subject;
-            this.fromAddress = fromAddress;
-            this.replyTo = replyTo;
-            this.data = data;
-            if (this.replyTo == null || this.replyTo.equals("")) {
-                this.replyTo = this.fromAddress;
-            }
-            this.signedOnly = signedOnly;
-        }
-    }
-
-    private Vector<Conversation> mConversations;
-    private Vector<Message> mMessages;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        Preferences prefs = Preferences.getPreferences(this);
-
-        super.onCreate(savedInstanceState);
-
-        mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-
-        mConversations = new Vector<Conversation>();
-        mMessages = new Vector<Message>();
-
-        String account = getIntent().getExtras().getString(EXTRA_ACCOUNT);
-        // TODO: what if account is null?
-        Uri uri = Uri.parse("content://gmail-ls/conversations/" + account);
-        Cursor cursor = managedQuery(uri, new String[] { "conversation_id", "subject" }, null,
-                null, null);
-        for (int i = 0; i < cursor.getCount(); ++i) {
-            cursor.moveToPosition(i);
-
-            int idIndex = cursor.getColumnIndex("conversation_id");
-            int subjectIndex = cursor.getColumnIndex("subject");
-            long conversationId = cursor.getLong(idIndex);
-            Conversation conversation = new Conversation(conversationId,
-                    cursor.getString(subjectIndex));
-            Uri messageUri = Uri.withAppendedPath(uri, "" + conversationId + "/messages");
-            Cursor messageCursor = managedQuery(messageUri, new String[] { "messageId", "subject",
-                    "fromAddress", "replyToAddresses", "body" }, null, null, null);
-            Vector<Message> messages = new Vector<Message>();
-            for (int j = 0; j < messageCursor.getCount(); ++j) {
-                messageCursor.moveToPosition(j);
-                idIndex = messageCursor.getColumnIndex("messageId");
-                subjectIndex = messageCursor.getColumnIndex("subject");
-                int fromAddressIndex = messageCursor.getColumnIndex("fromAddress");
-                int replyToIndex = messageCursor.getColumnIndex("replyToAddresses");
-                int bodyIndex = messageCursor.getColumnIndex("body");
-                String data = messageCursor.getString(bodyIndex);
-                data = Html.fromHtml(data).toString();
-                boolean signedOnly = false;
-                Matcher matcher = PGPMain.PGP_MESSAGE.matcher(data);
-                if (matcher.matches()) {
-                    data = matcher.group(1);
-                } else {
-                    matcher = PGPMain.PGP_SIGNED_MESSAGE.matcher(data);
-                    if (matcher.matches()) {
-                        data = matcher.group(1);
-                        signedOnly = true;
-                    } else {
-                        data = null;
-                    }
-                }
-                Message message = new Message(conversation, messageCursor.getLong(idIndex),
-                        messageCursor.getString(subjectIndex),
-                        messageCursor.getString(fromAddressIndex),
-                        messageCursor.getString(replyToIndex), data, signedOnly);
-
-                messages.add(message);
-                mMessages.add(message);
-            }
-            conversation.messages = messages;
-            mConversations.add(conversation);
-        }
-
-        setListAdapter(new MailboxAdapter());
-        getListView().setOnItemClickListener(new OnItemClickListener() {
-            public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
-                Intent intent = new Intent(MailListActivity.this, DecryptActivity.class);
-                intent.setAction(DecryptActivity.ACTION_DECRYPT);
-                Message message = (Message) ((MailboxAdapter) getListAdapter()).getItem(position);
-                intent.putExtra(DecryptActivity.EXTRA_TEXT, message.data);
-                intent.putExtra(DecryptActivity.EXTRA_SUBJECT, message.subject);
-                intent.putExtra(DecryptActivity.EXTRA_REPLY_TO, message.replyTo);
-                startActivity(intent);
-            }
-        });
-    }
-
-    private class MailboxAdapter extends BaseAdapter implements ListAdapter {
-
-        @Override
-        public boolean isEnabled(int position) {
-            Message message = (Message) getItem(position);
-            return message.data != null;
-        }
-
-        @Override
-        public boolean hasStableIds() {
-            return true;
-        }
-
-        public int getCount() {
-            return mMessages.size();
-        }
-
-        public Object getItem(int position) {
-            return mMessages.get(position);
-        }
-
-        public long getItemId(int position) {
-            return mMessages.get(position).id;
-        }
-
-        public View getView(int position, View convertView, ViewGroup parent) {
-            View view = mInflater.inflate(R.layout.mailbox_message_item, null);
-
-            Message message = (Message) getItem(position);
-
-            TextView subject = (TextView) view.findViewById(R.id.subject);
-            TextView email = (TextView) view.findViewById(R.id.emailAddress);
-            ImageView status = (ImageView) view.findViewById(R.id.ic_status);
-
-            subject.setText(message.subject);
-            email.setText(message.fromAddress);
-            if (message.data != null) {
-                if (message.signedOnly) {
-                    status.setImageResource(R.drawable.signed);
-                } else {
-                    status.setImageResource(R.drawable.encrypted);
-                }
-                status.setVisibility(View.VISIBLE);
-            } else {
-                status.setVisibility(View.INVISIBLE);
-            }
-
-            return view;
-        }
-    }
-}
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/MainActivity.java b/org_apg/src/org/thialfihar/android/apg/ui/MainActivity.java
index dafc2924b..26387f870 100644
--- a/org_apg/src/org/thialfihar/android/apg/ui/MainActivity.java
+++ b/org_apg/src/org/thialfihar/android/apg/ui/MainActivity.java
@@ -17,9 +17,6 @@
 
 package org.thialfihar.android.apg.ui;
 
-import java.security.Security;
-
-import org.spongycastle.jce.provider.BouncyCastleProvider;
 import org.thialfihar.android.apg.Id;
 import org.thialfihar.android.apg.R;
 
@@ -33,9 +30,6 @@ import android.os.Bundle;
 import android.view.View;
 
 public class MainActivity extends SherlockActivity {
-    static {
-        Security.addProvider(new BouncyCastleProvider());
-    }
 
     public void manageKeysOnClick(View view) {
         startActivity(new Intent(this, PublicKeyListActivity.class));
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/SecretKeyListActivity.java b/org_apg/src/org/thialfihar/android/apg/ui/SecretKeyListActivity.java
index 2d5108cad..0ba476768 100644
--- a/org_apg/src/org/thialfihar/android/apg/ui/SecretKeyListActivity.java
+++ b/org_apg/src/org/thialfihar/android/apg/ui/SecretKeyListActivity.java
@@ -19,16 +19,19 @@ package org.thialfihar.android.apg.ui;
 import org.thialfihar.android.apg.R;
 import org.thialfihar.android.apg.Constants;
 import org.thialfihar.android.apg.Id;
-import org.thialfihar.android.apg.deprecated.AskForPassphrase;
 import org.thialfihar.android.apg.helper.PGPHelper;
 import org.thialfihar.android.apg.helper.PGPMain;
+import org.thialfihar.android.apg.ui.dialog.PassphraseDialogFragment;
+import org.thialfihar.android.apg.util.Log;
 
 import com.actionbarsherlock.view.Menu;
 import com.actionbarsherlock.view.MenuItem;
 
-import android.app.Dialog;
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
 import android.view.View;
@@ -39,6 +42,7 @@ import android.widget.ExpandableListView.OnChildClickListener;
 import com.google.zxing.integration.android.IntentIntegrator;
 
 public class SecretKeyListActivity extends KeyListActivity implements OnChildClickListener {
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         mExportFilename = Constants.path.APP_DIR + "/secexport.asc";
@@ -86,7 +90,7 @@ public class SecretKeyListActivity extends KeyListActivity implements OnChildCli
             menu.add(0, Id.menu.edit, 0, R.string.menu_editKey);
             menu.add(0, Id.menu.export, 1, R.string.menu_exportKey);
             menu.add(0, Id.menu.delete, 2, R.string.menu_deleteKey);
-            menu.add(0, Id.menu.share, 2, R.string.menu_share);
+            menu.add(0, Id.menu.share_qr_code, 2, R.string.menu_share);
         }
     }
 
@@ -107,12 +111,13 @@ public class SecretKeyListActivity extends KeyListActivity implements OnChildCli
             return true;
         }
 
-        case Id.menu.share: {
+        case Id.menu.share_qr_code: {
             mSelectedItem = groupPosition;
 
             long keyId = ((KeyListAdapter) mList.getExpandableListAdapter())
                     .getGroupId(mSelectedItem);
-            String msg = keyId + "," + PGPHelper.getFingerPrint(keyId);
+            // String msg = keyId + "," + PGPHelper.getFingerPrint(keyId);
+            String msg = PGPHelper.getPubkeyAsArmoredString(keyId);
 
             new IntentIntegrator(this).shareText(msg);
         }
@@ -130,37 +135,43 @@ public class SecretKeyListActivity extends KeyListActivity implements OnChildCli
         return true;
     }
 
-    @Override
-    protected Dialog onCreateDialog(int id) {
-        switch (id) {
-        case Id.dialog.pass_phrase: {
-            long keyId = ((KeyListAdapter) mList.getExpandableListAdapter())
-                    .getGroupId(mSelectedItem);
-            return AskForPassphrase.createDialog(this, keyId, this);
-        }
-
-        default: {
-            return super.onCreateDialog(id);
-        }
-        }
-    }
-
     public void checkPassPhraseAndEdit() {
         long keyId = ((KeyListAdapter) mList.getExpandableListAdapter()).getGroupId(mSelectedItem);
         String passPhrase = PGPMain.getCachedPassPhrase(keyId);
         if (passPhrase == null) {
-            showDialog(Id.dialog.pass_phrase);
+            showPassphraseDialog(keyId);
         } else {
             PGPMain.setEditPassPhrase(passPhrase);
             editKey();
         }
     }
 
-    @Override
-    public void passPhraseCallback(long keyId, String passPhrase) {
-        super.passPhraseCallback(keyId, passPhrase);
-        PGPMain.setEditPassPhrase(passPhrase);
-        editKey();
+    private void showPassphraseDialog(final long secretKeyId) {
+        // Message is received after passphrase is cached
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                if (message.what == PassphraseDialogFragment.MESSAGE_OKAY) {
+                    String passPhrase = PGPMain.getCachedPassPhrase(secretKeyId);
+                    PGPMain.setEditPassPhrase(passPhrase);
+                    editKey();
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(returnHandler);
+
+        try {
+            PassphraseDialogFragment passphraseDialog = PassphraseDialogFragment.newInstance(
+                    messenger, secretKeyId);
+
+            passphraseDialog.show(getSupportFragmentManager(), "passphraseDialog");
+        } catch (PGPMain.GeneralException e) {
+            Log.d(Constants.TAG, "No passphrase for this secret key, encrypt directly!");
+            // send message to handler to start encryption directly
+            returnHandler.sendEmptyMessage(PassphraseDialogFragment.MESSAGE_OKAY);
+        }
     }
 
     private void createKey() {
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/dialog/DeleteKeyDialogFragment.java b/org_apg/src/org/thialfihar/android/apg/ui/dialog/DeleteKeyDialogFragment.java
new file mode 100644
index 000000000..4cb1cd02f
--- /dev/null
+++ b/org_apg/src/org/thialfihar/android/apg/ui/dialog/DeleteKeyDialogFragment.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.dialog;
+
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.spongycastle.openpgp.PGPSecretKeyRing;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.helper.PGPHelper;
+import org.thialfihar.android.apg.helper.PGPMain;
+import org.thialfihar.android.apg.util.Log;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.FragmentActivity;
+
+public class DeleteKeyDialogFragment extends DialogFragment {
+
+    private Messenger mMessenger;
+
+    private static final String ARG_MESSENGER = "messenger";
+    private static final String ARG_DELETE_KEY_RING_ID = "delete_file";
+    private static final String ARG_KEY_TYPE = "key_type";
+
+    public static final int MESSAGE_OKAY = 1;
+
+    /**
+     * Creates new instance of this delete file dialog fragment
+     */
+    public static DeleteKeyDialogFragment newInstance(Messenger messenger, int deleteKeyRingId,
+            int keyType) {
+        DeleteKeyDialogFragment frag = new DeleteKeyDialogFragment();
+        Bundle args = new Bundle();
+
+        args.putParcelable(ARG_MESSENGER, messenger);
+        args.putInt(ARG_DELETE_KEY_RING_ID, deleteKeyRingId);
+        args.putInt(ARG_KEY_TYPE, keyType);
+
+        frag.setArguments(args);
+
+        return frag;
+    }
+
+    /**
+     * Creates dialog
+     */
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        final FragmentActivity activity = getActivity();
+
+        final int deleteKeyRingId = getArguments().getInt(ARG_DELETE_KEY_RING_ID);
+        final int keyType = getArguments().getInt(ARG_KEY_TYPE);
+
+        // TODO: better way to do this?
+        String userId = "<unknown>";
+        Object keyRing = PGPMain.getKeyRing(deleteKeyRingId);
+        if (keyRing != null) {
+            if (keyRing instanceof PGPPublicKeyRing) {
+                userId = PGPHelper.getMainUserIdSafe(activity,
+                        PGPHelper.getMasterKey((PGPPublicKeyRing) keyRing));
+            } else {
+                userId = PGPHelper.getMainUserIdSafe(activity,
+                        PGPHelper.getMasterKey((PGPSecretKeyRing) keyRing));
+            }
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(activity);
+        builder.setTitle(R.string.warning);
+        builder.setMessage(getString(
+                keyType == Id.type.public_key ? R.string.keyDeletionConfirmation
+                        : R.string.secretKeyDeletionConfirmation, userId));
+        builder.setIcon(android.R.drawable.ic_dialog_alert);
+        builder.setPositiveButton(R.string.btn_delete, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                // deleteKey(deleteKeyRingId);
+                PGPMain.deleteKey(deleteKeyRingId);
+
+                dismiss();
+
+                sendMessageToHandler(MESSAGE_OKAY);
+            }
+        });
+        builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                dismiss();
+            }
+        });
+        return builder.create();
+    }
+
+    /**
+     * Send message back to handler which is initialized in a activity
+     * 
+     * @param what
+     *            Message integer you want to send
+     */
+    private void sendMessageToHandler(Integer what) {
+        Message msg = Message.obtain();
+        msg.what = what;
+
+        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);
+        }
+    }
+}
\ No newline at end of file
diff --git a/org_apg/src/org/thialfihar/android/apg/ui/dialog/LookupUnknownKeyDialogFragment.java b/org_apg/src/org/thialfihar/android/apg/ui/dialog/LookupUnknownKeyDialogFragment.java
new file mode 100644
index 000000000..9797abc2a
--- /dev/null
+++ b/org_apg/src/org/thialfihar/android/apg/ui/dialog/LookupUnknownKeyDialogFragment.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.dialog;
+
+import org.thialfihar.android.apg.helper.PGPHelper;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.R;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnCancelListener;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.support.v4.app.DialogFragment;
+
+import org.thialfihar.android.apg.ui.KeyServerQueryActivity;
+import org.thialfihar.android.apg.util.Log;
+
+public class LookupUnknownKeyDialogFragment extends DialogFragment {
+
+    private Messenger mMessenger;
+
+    private static final String ARG_MESSENGER = "messenger";
+    private static final String ARG_UNKNOWN_KEY_ID = "unknown_key_id";
+
+    public static final int MESSAGE_OKAY = 1;
+    public static final int MESSAGE_CANCEL = 2;
+
+    /**
+     * Creates new instance of this dialog fragment
+     * 
+     * @param messenger
+     * @param unknownKeyId
+     * @return
+     */
+    public static LookupUnknownKeyDialogFragment newInstance(Messenger messenger, long unknownKeyId) {
+        LookupUnknownKeyDialogFragment frag = new LookupUnknownKeyDialogFragment();
+        Bundle args = new Bundle();
+        args.putLong(ARG_UNKNOWN_KEY_ID, unknownKeyId);
+        args.putParcelable(ARG_MESSENGER, messenger);
+
+        frag.setArguments(args);
+
+        return frag;
+    }
+
+    /**
+     * Creates dialog
+     */
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        final Activity activity = getActivity();
+
+        final long unknownKeyId = getArguments().getLong(ARG_UNKNOWN_KEY_ID);
+        mMessenger = getArguments().getParcelable(ARG_MESSENGER);
+
+        AlertDialog.Builder alert = new AlertDialog.Builder(activity);
+
+        alert.setIcon(android.R.drawable.ic_dialog_alert);
+        alert.setTitle(R.string.title_unknownSignatureKey);
+        alert.setMessage(getString(R.string.lookupUnknownKey,
+                PGPHelper.getSmallFingerPrint(unknownKeyId)));
+
+        alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                dismiss();
+
+                sendMessageToHandler(MESSAGE_OKAY);
+
+                Intent intent = new Intent(activity, KeyServerQueryActivity.class);
+                intent.setAction(KeyServerQueryActivity.ACTION_LOOK_UP_KEY_ID);
+                intent.putExtra(KeyServerQueryActivity.EXTRA_KEY_ID, unknownKeyId);
+                startActivityForResult(intent, Id.request.look_up_key_id);
+            }
+        });
+        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                dismiss();
+
+                sendMessageToHandler(MESSAGE_CANCEL);
+            }
+        });
+        alert.setCancelable(true);
+        alert.setOnCancelListener(new OnCancelListener() {
+
+            @Override
+            public void onCancel(DialogInterface dialog) {
+                sendMessageToHandler(MESSAGE_CANCEL);
+            }
+        });
+
+        return alert.create();
+    }
+
+    /**
+     * Send message back to handler which is initialized in a activity
+     * 
+     * @param what
+     *            Message integer you want to send
+     */
+    private void sendMessageToHandler(Integer what) {
+        Message msg = Message.obtain();
+        msg.what = what;
+
+        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);
+        }
+    }
+}
\ No newline at end of file
-- 
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