Share with NFC, Qr Code sharing refactored, Receiving NFC is not ready yet

11 files changed, 366 insertions, 52 deletions

diff --git a/APG/src/org/thialfihar/android/apg/Constants.java b/APG/src/org/thialfihar/android/apg/Constants.java
index 95ab8158d..8a52523d7 100644
--- a/APG/src/org/thialfihar/android/apg/Constants.java
+++ b/APG/src/org/thialfihar/android/apg/Constants.java
@@ -25,6 +25,9 @@ public final class Constants {
     public static final String TAG = "APG";
 
     public static final String PACKAGE_NAME = "org.thialfihar.android.apg";
+    
+    public static final String NFC_MIME = "application/org.thialfihar.android.apg";
+
 
     public static final String PERMISSION_ACCESS_KEY_DATABASE = PACKAGE_NAME
             + ".permission.ACCESS_KEY_DATABASE";
diff --git a/APG/src/org/thialfihar/android/apg/Id.java b/APG/src/org/thialfihar/android/apg/Id.java
index 4d01ef5c4..d25bb24b0 100644
--- a/APG/src/org/thialfihar/android/apg/Id.java
+++ b/APG/src/org/thialfihar/android/apg/Id.java
@@ -36,7 +36,8 @@ public final class Id {
         public static final int update = 0x21070004;
         public static final int exportToServer = 0x21070005;
         public static final int share_qr_code = 0x21070006;
-        public static final int signKey = 0x21070007;
+        public static final int share_nfc = 0x21070007;
+        public static final int signKey = 0x21070008;
 
         public static final class option {
             public static final int new_pass_phrase = 0x21070001;
diff --git a/APG/src/org/thialfihar/android/apg/helper/OtherHelper.java b/APG/src/org/thialfihar/android/apg/helper/OtherHelper.java
index bd5db2410..005f7cf29 100644
--- a/APG/src/org/thialfihar/android/apg/helper/OtherHelper.java
+++ b/APG/src/org/thialfihar/android/apg/helper/OtherHelper.java
@@ -16,7 +16,6 @@
 
 package org.thialfihar.android.apg.helper;
 
-import java.io.InputStream;
 import java.util.Calendar;
 import java.util.GregorianCalendar;
 import java.util.Iterator;
@@ -30,7 +29,6 @@ import com.actionbarsherlock.app.ActionBar;
 import com.actionbarsherlock.app.SherlockFragmentActivity;
 
 import android.app.Activity;
-import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.widget.Toast;
@@ -38,20 +36,6 @@ import android.widget.Toast;
 public class OtherHelper {
 
     /**
-     * Gets input stream of raw resource
-     * 
-     * @param context
-     *            current context
-     * @param resourceID
-     *            of html file to read
-     * @return input stream of resource
-     */
-    public static InputStream getInputStreamFromResource(Context context, int resourceID) {
-        InputStream raw = context.getResources().openRawResource(resourceID);
-        return raw;
-    }
-
-    /**
      * Return the number if days between two dates
      * 
      * @param first
diff --git a/APG/src/org/thialfihar/android/apg/ui/HelpActivity.java b/APG/src/org/thialfihar/android/apg/ui/HelpActivity.java
index bd9d68ce7..f426b42bd 100644
--- a/APG/src/org/thialfihar/android/apg/ui/HelpActivity.java
+++ b/APG/src/org/thialfihar/android/apg/ui/HelpActivity.java
@@ -37,6 +37,8 @@ import android.support.v4.view.ViewPager;
 import com.actionbarsherlock.app.SherlockFragmentActivity;
 
 public class HelpActivity extends SherlockFragmentActivity {
+    public static final String EXTRA_SELECTED_TAB = "selectedTab";
+
     ViewPager mViewPager;
     TabsAdapter mTabsAdapter;
     TextView tabCenter;
@@ -74,18 +76,29 @@ public class HelpActivity extends SherlockFragmentActivity {
 
         mTabsAdapter = new TabsAdapter(this, mViewPager);
 
+        int selectedTab = 0;
+        Intent intent = getIntent();
+        if (intent.getExtras() != null && intent.getExtras().containsKey(EXTRA_SELECTED_TAB)) {
+            selectedTab = intent.getExtras().getInt(EXTRA_SELECTED_TAB);
+        }
+
         Bundle startBundle = new Bundle();
         startBundle.putInt(HelpFragmentHtml.ARG_HTML_FILE, R.raw.help_start);
         mTabsAdapter.addTab(bar.newTab().setText(getString(R.string.help_tab_start)),
-                HelpFragmentHtml.class, startBundle);
+                HelpFragmentHtml.class, startBundle, (selectedTab == 0 ? true : false));
+
+        Bundle nfcBundle = new Bundle();
+        nfcBundle.putInt(HelpFragmentHtml.ARG_HTML_FILE, R.raw.help_nfc_beam);
+        mTabsAdapter.addTab(bar.newTab().setText(getString(R.string.help_tab_nfc_beam)),
+                HelpFragmentHtml.class, nfcBundle, (selectedTab == 1 ? true : false));
 
         Bundle changelogBundle = new Bundle();
         changelogBundle.putInt(HelpFragmentHtml.ARG_HTML_FILE, R.raw.help_changelog);
         mTabsAdapter.addTab(bar.newTab().setText(getString(R.string.help_tab_changelog)),
-                HelpFragmentHtml.class, changelogBundle);
+                HelpFragmentHtml.class, changelogBundle, (selectedTab == 2 ? true : false));
 
         mTabsAdapter.addTab(bar.newTab().setText(getString(R.string.help_tab_about)),
-                HelpFragmentAbout.class, null);
+                HelpFragmentAbout.class, null, (selectedTab == 3 ? true : false));
     }
 
     public static class TabsAdapter extends FragmentPagerAdapter implements ActionBar.TabListener,
@@ -114,12 +127,12 @@ public class HelpActivity extends SherlockFragmentActivity {
             mViewPager.setOnPageChangeListener(this);
         }
 
-        public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
+        public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args, boolean selected) {
             TabInfo info = new TabInfo(clss, args);
             tab.setTag(info);
             tab.setTabListener(this);
             mTabs.add(info);
-            mActionBar.addTab(tab);
+            mActionBar.addTab(tab, selected);
             notifyDataSetChanged();
         }
 
diff --git a/APG/src/org/thialfihar/android/apg/ui/HelpFragmentAbout.java b/APG/src/org/thialfihar/android/apg/ui/HelpFragmentAbout.java
index 1b80db66b..f1cc8407c 100644
--- a/APG/src/org/thialfihar/android/apg/ui/HelpFragmentAbout.java
+++ b/APG/src/org/thialfihar/android/apg/ui/HelpFragmentAbout.java
@@ -57,8 +57,7 @@ public class HelpFragmentAbout extends SherlockFragment {
         View view = inflater.inflate(R.layout.help_fragment_about, container, false);
 
         // load html from html file from /res/raw
-        InputStream inputStreamText = OtherHelper.getInputStreamFromResource(this.getActivity(),
-                R.raw.help_about);
+        InputStream inputStreamText = getResources().openRawResource(R.raw.help_about);
 
         TextView versionText = (TextView) view.findViewById(R.id.help_about_version);
         versionText.setText(getString(R.string.help_about_version) + " " + getVersion());
diff --git a/APG/src/org/thialfihar/android/apg/ui/HelpFragmentHtml.java b/APG/src/org/thialfihar/android/apg/ui/HelpFragmentHtml.java
index e46e7b112..eeea56a00 100644
--- a/APG/src/org/thialfihar/android/apg/ui/HelpFragmentHtml.java
+++ b/APG/src/org/thialfihar/android/apg/ui/HelpFragmentHtml.java
@@ -23,6 +23,7 @@ import net.nightwhistler.htmlspanner.HtmlSpanner;
 import net.nightwhistler.htmlspanner.JellyBeanSpanFixTextView;
 
 import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.R;
 import org.thialfihar.android.apg.helper.OtherHelper;
 import org.thialfihar.android.apg.util.Log;
 
@@ -74,8 +75,7 @@ public class HelpFragmentHtml extends SherlockFragment {
         htmlFile = getArguments().getInt(ARG_HTML_FILE);
 
         // load html from html file from /res/raw
-        InputStream inputStreamText = OtherHelper.getInputStreamFromResource(this.getActivity(),
-                htmlFile);
+        InputStream inputStreamText = getResources().openRawResource(htmlFile);
 
         mActivity = getActivity();
 
diff --git a/APG/src/org/thialfihar/android/apg/ui/ImportKeysActivity.java b/APG/src/org/thialfihar/android/apg/ui/ImportKeysActivity.java
index bb40d1033..be4542bbb 100644
--- a/APG/src/org/thialfihar/android/apg/ui/ImportKeysActivity.java
+++ b/APG/src/org/thialfihar/android/apg/ui/ImportKeysActivity.java
@@ -49,15 +49,14 @@ import com.google.zxing.integration.android.IntentIntegrator;
 import com.google.zxing.integration.android.IntentResult;
 
 public class ImportKeysActivity extends SherlockFragmentActivity {
-
-    public static final String ACTION = Constants.INTENT_PREFIX + "IMPORT";
+    public static final String ACTION_IMPORT = Constants.INTENT_PREFIX + "IMPORT";
     public static final String ACTION_IMPORT_FROM_FILE = Constants.INTENT_PREFIX
             + "IMPORT_FROM_FILE";
     public static final String ACTION_IMPORT_FROM_QR_CODE = Constants.INTENT_PREFIX
             + "IMPORT_FROM_QR_CODE";
     public static final String ACTION_IMPORT_FROM_NFC = Constants.INTENT_PREFIX + "IMPORT_FROM_NFC";
 
-    // only used by IMPORT_AND_RETURN
+    // only used by IMPORT
     public static final String EXTRA_TEXT = "text";
 
     protected String mImportFilename = Constants.path.APP_DIR + "/";
@@ -93,11 +92,14 @@ public class ImportKeysActivity extends SherlockFragmentActivity {
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         menu.add(1, Id.menu.option.import_from_file, 0, R.string.menu_importFromFile)
-                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+                .setShowAsAction(
+                        MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
         menu.add(1, Id.menu.option.import_from_qr_code, 1, R.string.menu_importFromQrCode)
-                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+                .setShowAsAction(
+                        MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
         menu.add(1, Id.menu.option.import_from_nfc, 2, R.string.menu_importFromNfc)
-                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+                .setShowAsAction(
+                        MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
 
         return true;
     }
@@ -115,16 +117,14 @@ public class ImportKeysActivity extends SherlockFragmentActivity {
 
         case Id.menu.option.import_from_file:
             showImportKeysDialog();
-
             return true;
 
         case Id.menu.option.import_from_qr_code:
             importFromQrCode();
-
             return true;
 
         case Id.menu.option.import_from_nfc:
-
+            importFromNfc();
             return true;
 
         default:
@@ -147,13 +147,13 @@ public class ImportKeysActivity extends SherlockFragmentActivity {
         if (Intent.ACTION_VIEW.equals(action)) {
             // Android's Action when opening file associated to APG (see AndroidManifest.xml)
             // override action to delegate it to APGs ACTION_IMPORT
-            action = ACTION;
+            action = ACTION_IMPORT;
         }
 
         /**
          * APG's own Actions
          */
-        if (ACTION.equals(action)) {
+        if (ACTION_IMPORT.equals(action)) {
             if ("file".equals(intent.getScheme()) && intent.getDataString() != null) {
                 mImportFilename = intent.getData().getPath();
             } else {
@@ -168,7 +168,7 @@ public class ImportKeysActivity extends SherlockFragmentActivity {
         } else if (ACTION_IMPORT_FROM_QR_CODE.equals(action)) {
             importFromQrCode();
         } else if (ACTION_IMPORT_FROM_NFC.equals(action)) {
-
+            importFromNfc();
         }
     }
 
@@ -176,6 +176,13 @@ public class ImportKeysActivity extends SherlockFragmentActivity {
         new IntentIntegrator(this).initiateScan();
     }
 
+    private void importFromNfc() {
+        // show nfc help
+        Intent intent = new Intent(this, HelpActivity.class);
+        intent.putExtra(HelpActivity.EXTRA_SELECTED_TAB, 1);
+        startActivityForResult(intent, 0);
+    }
+
     /**
      * Show to dialog from where to import keys
      */
diff --git a/APG/src/org/thialfihar/android/apg/ui/KeyListPublicFragment.java b/APG/src/org/thialfihar/android/apg/ui/KeyListPublicFragment.java
index 29c2823a1..06bf7e7d9 100644
--- a/APG/src/org/thialfihar/android/apg/ui/KeyListPublicFragment.java
+++ b/APG/src/org/thialfihar/android/apg/ui/KeyListPublicFragment.java
@@ -17,8 +17,6 @@
 
 package org.thialfihar.android.apg.ui;
 
-import java.util.ArrayList;
-
 import org.spongycastle.openpgp.PGPPublicKeyRing;
 import org.thialfihar.android.apg.Id;
 import org.thialfihar.android.apg.R;
@@ -28,8 +26,6 @@ import org.thialfihar.android.apg.provider.ApgContract.KeyRings;
 import org.thialfihar.android.apg.provider.ApgContract.UserIds;
 import org.thialfihar.android.apg.ui.widget.KeyListAdapter;
 
-import com.google.zxing.integration.android.IntentIntegrator;
-
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
@@ -41,7 +37,6 @@ import android.view.ContextMenu;
 import android.view.View;
 import android.view.ContextMenu.ContextMenuInfo;
 import android.widget.ExpandableListView;
-import android.widget.Toast;
 import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
 
 public class KeyListPublicFragment extends KeyListFragment implements
@@ -81,7 +76,8 @@ public class KeyListPublicFragment extends KeyListFragment implements
         menu.add(0, Id.menu.update, 1, R.string.menu_updateKey);
         menu.add(0, Id.menu.signKey, 2, R.string.menu_signKey);
         menu.add(0, Id.menu.exportToServer, 3, R.string.menu_exportKeyToServer);
-        menu.add(0, Id.menu.share_qr_code, 6, R.string.menu_share);
+        menu.add(0, Id.menu.share_qr_code, 6, R.string.menu_shareQrCode);
+        menu.add(0, Id.menu.share_nfc, 7, R.string.menu_shareNfc);
 
     }
 
@@ -145,7 +141,22 @@ public class KeyListPublicFragment extends KeyListFragment implements
         case Id.menu.share_qr_code:
             // get master key id using row id
             long masterKeyId = ProviderHelper.getPublicMasterKeyId(mKeyListActivity, keyRingRowId);
-            shareByQrCode(masterKeyId);
+
+            Intent qrCodeIntent = new Intent(mKeyListActivity, ShareQrCodeActivity.class);
+            qrCodeIntent.setAction(ShareQrCodeActivity.ACTION_SHARE_WITH_QR_CODE);
+            qrCodeIntent.putExtra(ShareQrCodeActivity.EXTRA_MASTER_KEY_ID, masterKeyId);
+            startActivityForResult(qrCodeIntent, 0);
+
+            return true;
+
+        case Id.menu.share_nfc:
+            // get master key id using row id
+            long masterKeyId2 = ProviderHelper.getPublicMasterKeyId(mKeyListActivity, keyRingRowId);
+
+            Intent nfcIntent = new Intent(mKeyListActivity, ShareNfcBeamActivity.class);
+            nfcIntent.setAction(ShareNfcBeamActivity.ACTION_SHARE_WITH_NFC);
+            nfcIntent.putExtra(ShareNfcBeamActivity.EXTRA_MASTER_KEY_ID, masterKeyId2);
+            startActivityForResult(nfcIntent, 0);
 
             return true;
 
@@ -155,12 +166,6 @@ public class KeyListPublicFragment extends KeyListFragment implements
         }
     }
 
-    private void shareByQrCode(long masterKeyId) {
-        ArrayList<String> keyringArmored = ProviderHelper.getPublicKeyRingsAsArmoredString(
-                mKeyListActivity, new long[] { masterKeyId });
-        new IntentIntegrator(mKeyListActivity).shareText(keyringArmored.get(0));
-    }
-
     // These are the rows that we will retrieve.
     static final String[] PROJECTION = new String[] { KeyRings._ID, KeyRings.MASTER_KEY_ID,
             UserIds.USER_ID };
diff --git a/APG/src/org/thialfihar/android/apg/ui/KeyServerQueryActivity.java b/APG/src/org/thialfihar/android/apg/ui/KeyServerQueryActivity.java
index bce6785cf..593d4e5f4 100644
--- a/APG/src/org/thialfihar/android/apg/ui/KeyServerQueryActivity.java
+++ b/APG/src/org/thialfihar/android/apg/ui/KeyServerQueryActivity.java
@@ -228,7 +228,7 @@ public class KeyServerQueryActivity extends SherlockFragmentActivity {
                             if (mKeyData != null) {
                                 Intent intent = new Intent(KeyServerQueryActivity.this,
                                         KeyListPublicActivity.class);
-                                intent.setAction(ImportKeysActivity.ACTION);
+                                intent.setAction(ImportKeysActivity.ACTION_IMPORT);
                                 intent.putExtra(ImportKeysActivity.EXTRA_TEXT, mKeyData);
                                 startActivity(intent);
                             }
diff --git a/APG/src/org/thialfihar/android/apg/ui/ShareNfcBeamActivity.java b/APG/src/org/thialfihar/android/apg/ui/ShareNfcBeamActivity.java
new file mode 100644
index 000000000..d1a1c198c
--- /dev/null
+++ b/APG/src/org/thialfihar/android/apg/ui/ShareNfcBeamActivity.java
@@ -0,0 +1,237 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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.io.IOException;
+import java.io.InputStream;
+
+import net.nightwhistler.htmlspanner.HtmlSpanner;
+import net.nightwhistler.htmlspanner.JellyBeanSpanFixTextView;
+
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.helper.OtherHelper;
+import org.thialfihar.android.apg.provider.ProviderHelper;
+
+import com.actionbarsherlock.app.SherlockFragmentActivity;
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuInflater;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.annotation.TargetApi;
+import android.content.Intent;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcAdapter.CreateNdefMessageCallback;
+import android.nfc.NfcEvent;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.util.Log;
+import android.widget.Toast;
+import android.nfc.NfcAdapter.OnNdefPushCompleteCallback;
+import android.os.Handler;
+import android.os.Message;
+import android.provider.Settings;
+import android.text.method.LinkMovementMethod;
+
+@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+public class ShareNfcBeamActivity extends SherlockFragmentActivity implements
+        CreateNdefMessageCallback, OnNdefPushCompleteCallback {
+    public static final String ACTION_SHARE_WITH_NFC = Constants.INTENT_PREFIX + "SHARE_WITH_NFC";
+
+    public static final String EXTRA_MASTER_KEY_ID = "masterKeyId";
+
+    NfcAdapter mNfcAdapter;
+
+    byte[] mSharedKeyringBytes;
+
+    private static final int MESSAGE_SENT = 1;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
+            Toast.makeText(this,
+                    getString(R.string.error) + ": " + getString(R.string.error_jellyBeanNeeded),
+                    Toast.LENGTH_LONG).show();
+            finish();
+        } else {
+            // Check for available NFC Adapter
+            mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
+            if (mNfcAdapter == null) {
+                Toast.makeText(this,
+                        getString(R.string.error) + ": " + getString(R.string.error_nfcNeeded),
+                        Toast.LENGTH_LONG).show();
+                finish();
+            } else {
+                buildView();
+
+                // handle actions after verifying that nfc works...
+                handleActions(getIntent());
+            }
+        }
+    }
+
+    protected void handleActions(Intent intent) {
+        String action = intent.getAction();
+        Bundle extras = intent.getExtras();
+
+        if (extras == null) {
+            extras = new Bundle();
+        }
+
+        if (ACTION_SHARE_WITH_NFC.equals(action)) {
+            long masterKeyId = getIntent().getExtras().getLong(EXTRA_MASTER_KEY_ID);
+
+            // get public keyring as byte array
+            mSharedKeyringBytes = ProviderHelper.getPublicKeyRingsAsByteArray(this,
+                    new long[] { masterKeyId });
+
+            // Register callback to set NDEF message
+            mNfcAdapter.setNdefPushMessageCallback(this, this);
+            // Register callback to listen for message-sent success
+            mNfcAdapter.setOnNdefPushCompleteCallback(this, this);
+        }
+    }
+
+    /**
+     * Parses the NDEF Message from the intent and prints to the TextView
+     */
+    void handleActionNdefDiscovered(Intent intent) {
+        Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
+        // only one message sent during the beam
+        NdefMessage msg = (NdefMessage) rawMsgs[0];
+        // record 0 contains the MIME type, record 1 is the AAR, if present
+        byte[] receivedKeyringBytes = msg.getRecords()[0].getPayload();
+        
+        
+        
+//        Log.d(Constants.TAG, new String());
+    }
+
+    private void buildView() {
+        // load html from html file from /res/raw
+        InputStream inputStreamText = getResources().openRawResource(R.raw.nfc_beam_share);
+
+        setContentView(R.layout.share_nfc_beam);
+
+        JellyBeanSpanFixTextView text = (JellyBeanSpanFixTextView) findViewById(R.id.nfc_beam_text);
+
+        // load html into textview
+        HtmlSpanner htmlSpanner = new HtmlSpanner();
+        htmlSpanner.setStripExtraWhiteSpace(true);
+        try {
+            text.setText(htmlSpanner.fromHtml(inputStreamText));
+        } catch (IOException e) {
+            Log.e(Constants.TAG, "Error while reading raw resources as stream", e);
+        }
+
+        // make links work
+        text.setMovementMethod(LinkMovementMethod.getInstance());
+
+        // no flickering when clicking textview for Android < 4
+        text.setTextColor(getResources().getColor(android.R.color.black));
+
+        // set actionbar without home button if called from another app
+        OtherHelper.setActionBarBackButton(this);
+    }
+
+    /**
+     * Implementation for the CreateNdefMessageCallback interface
+     */
+    @Override
+    public NdefMessage createNdefMessage(NfcEvent event) {
+        /**
+         * When a device receives a push with an AAR in it, the application specified in the AAR is
+         * guaranteed to run. The AAR overrides the tag dispatch system. You can add it back in to
+         * guarantee that this activity starts when receiving a beamed message. For now, this code
+         * uses the tag dispatch system.
+         */
+        NdefMessage msg = new NdefMessage(NdefRecord.createMime(Constants.NFC_MIME,
+                mSharedKeyringBytes), NdefRecord.createApplicationRecord(Constants.PACKAGE_NAME));
+        return msg;
+    }
+
+    /**
+     * Implementation for the OnNdefPushCompleteCallback interface
+     */
+    @Override
+    public void onNdefPushComplete(NfcEvent arg0) {
+        // A handler is needed to send messages to the activity when this
+        // callback occurs, because it happens from a binder thread
+        mHandler.obtainMessage(MESSAGE_SENT).sendToTarget();
+    }
+
+    /** This handler receives a message from onNdefPushComplete */
+    private final Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            switch (msg.what) {
+            case MESSAGE_SENT:
+                Toast.makeText(getApplicationContext(), "Message sent!", Toast.LENGTH_LONG).show();
+                break;
+            }
+        }
+    };
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        // Check to see that the Activity started due to an Android Beam
+        if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) {
+            handleActionNdefDiscovered(getIntent());
+        }
+    }
+
+    @Override
+    public void onNewIntent(Intent intent) {
+        // onResume gets called after this to handle the intent
+        setIntent(intent);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        MenuInflater inflater = getSupportMenuInflater();
+        inflater.inflate(R.menu.nfc_beam, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            // app icon in Action Bar clicked; go to KeyListPublicActivity
+            Intent intent = new Intent(this, KeyListPublicActivity.class);
+            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+            startActivity(intent);
+            return true;
+
+        case R.id.menu_settings:
+            Intent intentSettings = new Intent(Settings.ACTION_NFCSHARING_SETTINGS);
+            startActivity(intentSettings);
+            return true;
+
+        default:
+            return super.onOptionsItemSelected(item);
+        }
+    }
+}
diff --git a/APG/src/org/thialfihar/android/apg/ui/ShareQrCodeActivity.java b/APG/src/org/thialfihar/android/apg/ui/ShareQrCodeActivity.java
new file mode 100644
index 000000000..38449bf58
--- /dev/null
+++ b/APG/src/org/thialfihar/android/apg/ui/ShareQrCodeActivity.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2013 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;
+
+import java.util.ArrayList;
+
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.provider.ProviderHelper;
+
+import com.actionbarsherlock.app.SherlockFragmentActivity;
+import com.google.zxing.integration.android.IntentIntegrator;
+
+import android.content.Intent;
+import android.os.Bundle;
+
+public class ShareQrCodeActivity extends SherlockFragmentActivity {
+    public static final String ACTION_SHARE_WITH_QR_CODE = Constants.INTENT_PREFIX
+            + "SHARE_WITH_QR_CODE";
+
+    public static final String EXTRA_MASTER_KEY_ID = "masterKeyId";
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        handleActions(getIntent());
+    }
+
+    protected void handleActions(Intent intent) {
+        String action = intent.getAction();
+        Bundle extras = intent.getExtras();
+
+        if (extras == null) {
+            extras = new Bundle();
+        }
+
+        if (ACTION_SHARE_WITH_QR_CODE.equals(action)) {
+            long masterKeyId = getIntent().getExtras().getLong(EXTRA_MASTER_KEY_ID);
+
+            // get public keyring as ascii armored string
+            ArrayList<String> keyringArmored = ProviderHelper.getPublicKeyRingsAsArmoredString(
+                    this, new long[] { masterKeyId });
+            // close this activity
+            finish();
+
+            // use barcode scanner integration library
+            new IntentIntegrator(this).shareText(keyringArmored.get(0));
+        }
+    }
+
+}