made qr code available from muc and contact details as well

src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java

@@ -139,6 +139,15 @@ public class ConferenceDetailsActivity extends XmppActivity {
 		}
 	}
 
+	@Override
+	protected String getShareableUri() {
+		if (conversation!=null) {
+			return "xmpp:"+conversation.getContactJid().split("/")[0]+"?join";
+		} else {
+			return super.getShareableUri();
+		}
+	}
+
 	@Override
 	public boolean onCreateOptionsMenu(Menu menu) {
 		getMenuInflater().inflate(R.menu.muc_details, menu);

src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java

@@ -161,6 +161,15 @@ public class ContactDetailsActivity extends XmppActivity {
 		}
 	};
 
+	@Override
+	protected String getShareableUri() {
+		if (contact!=null) {
+			return "xmpp:"+contact.getJid();
+		} else {
+			return super.getShareableUri();
+		}
+	}
+
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);

src/main/java/eu/siacs/conversations/ui/ConversationActivity.java

@@ -83,18 +83,6 @@ public class ConversationActivity extends XmppActivity implements
 
 	private Uri pendingImageUri = null;
 
-	private NfcAdapter.CreateNdefMessageCallback mNdefPushMessageCallback = new NfcAdapter.CreateNdefMessageCallback() {
-		@Override
-		public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
-			Conversation conversation = getSelectedConversation();
-			NdefMessage msg = new NdefMessage(new NdefRecord[]{
-					NdefRecord.createUri("xmpp:"+conversation.getAccount().getJid()),
-					NdefRecord.createApplicationRecord("eu.siacs.conversations")
-			});
-			return msg;
-		}
-	};
-
 	public List<Conversation> getConversationList() {
 		return this.conversationList;
 	}
@@ -122,6 +110,16 @@ public class ConversationActivity extends XmppActivity implements
 		}
 	}
 
+	@Override
+	protected String getShareableUri() {
+		Conversation conversation = getSelectedConversation();
+		if (conversation!=null) {
+			return "xmpp:"+conversation.getAccount().getJid();
+		} else {
+			return super.getShareableUri();
+		}
+	}
+
 	public void hideConversationsOverview() {
 		if (mContentView instanceof SlidingPaneLayout) {
 			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
@@ -163,9 +161,6 @@ public class ConversationActivity extends XmppActivity implements
 
 		getActionBar().setDisplayHomeAsUpEnabled(false);
 		getActionBar().setHomeButtonEnabled(false);
-
-		registerNdefPushMessageCallback(this.mNdefPushMessageCallback);
-
 		this.listAdapter = new ConversationAdapter(this, conversationList);
 		listView.setAdapter(this.listAdapter);
 
@@ -664,6 +659,18 @@ public class ConversationActivity extends XmppActivity implements
 		}
 	}
 
+	@Override
+	public void onResume() {
+		super.onResume();
+		this.registerNdefPushMessageCallback();
+	}
+
+	@Override
+	public void onPause() {
+		super.onPause();
+		this.unregisterNdefPushMessageCallback();
+	}
+
 	@Override
 	protected void onStop() {
 		if (xmppConnectionServiceBound) {

src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java

@@ -41,6 +41,7 @@ import java.util.Hashtable;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.services.XmppConnectionService.OnAccountUpdate;
 import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
 import eu.siacs.conversations.utils.UIHelper;
@@ -243,42 +244,6 @@ public class EditAccountActivity extends XmppActivity {
 		}
 	}
 
-	protected void showQrCode() {
-		Point size = new Point();
-		getWindowManager().getDefaultDisplay().getSize(size);
-		final int width = (size.x < size.y ? size.x : size.y);
-		String jid = mAccount.getJid();
-		Bitmap bitmap = createQrCodeBitmap("xmpp:" + jid, width);
-		ImageView view = new ImageView(this);
-		view.setImageBitmap(bitmap);
-		AlertDialog.Builder builder = new AlertDialog.Builder(this);
-		builder.setView(view);
-		builder.create().show();
-	}
-
-	protected Bitmap createQrCodeBitmap(String input, int size) {
-		try {
-			final QRCodeWriter QR_CODE_WRITER = new QRCodeWriter();
-			final Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
-			hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
-			final BitMatrix result = QR_CODE_WRITER.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
-			final int width = result.getWidth();
-			final int height = result.getHeight();
-			final int[] pixels = new int[width * height];
-			for (int y = 0; y < height; y++) {
-				final int offset = y * width;
-				for (int x = 0; x < width; x++) {
-					pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
-				}
-			}
-			final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
-			bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
-			return bitmap;
-		} catch (final WriterException e) {
-			return null;
-		}
-	}
-
 	protected void updateSaveButton() {
 		if (mAccount != null
 				&& mAccount.getStatus() == Account.STATUS_CONNECTING) {
@@ -317,6 +282,15 @@ public class EditAccountActivity extends XmppActivity {
 				this.mPassword.getText().toString()));
 	}
 
+	@Override
+	protected String getShareableUri() {
+		if (mAccount!=null) {
+			return "xmpp:"+mAccount.getJid();
+		} else {
+			return super.getShareableUri();
+		}
+	}
+
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
@@ -366,16 +340,6 @@ public class EditAccountActivity extends XmppActivity {
 		return true;
 	}
 
-	@Override
-	public boolean onOptionsItemSelected(MenuItem item) {
-		switch (item.getItemId()) {
-			case R.id.action_show_qr_code:
-				showQrCode();
-				return true;
-		}
-		return super.onOptionsItemSelected(item);
-	}
-
 	@Override
 	protected void onStart() {
 		super.onStart();

src/main/java/eu/siacs/conversations/ui/XmppActivity.java

@@ -1,7 +1,56 @@
 package eu.siacs.conversations.ui;
 
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.AlertDialog.Builder;
+import android.app.PendingIntent;
+import android.content.ClipData;
+import android.content.ClipboardManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
+import android.content.IntentSender.SendIntentException;
+import android.content.ServiceConnection;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.graphics.Point;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcEvent;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.preference.PreferenceManager;
+import android.text.InputType;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
+import android.widget.ImageView;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.EncodeHintType;
+import com.google.zxing.WriterException;
+import com.google.zxing.common.BitMatrix;
+import com.google.zxing.qrcode.QRCodeWriter;
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
+
 import java.io.FileNotFoundException;
 import java.lang.ref.WeakReference;
+import java.util.Hashtable;
 import java.util.List;
 import java.util.concurrent.RejectedExecutionException;
 
@@ -16,41 +65,6 @@ import eu.siacs.conversations.services.AvatarService;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.services.XmppConnectionService.XmppConnectionBinder;
 import eu.siacs.conversations.utils.ExceptionHelper;
-import android.annotation.SuppressLint;
-import android.app.Activity;
-import android.app.AlertDialog;
-import android.app.PendingIntent;
-import android.app.AlertDialog.Builder;
-import android.content.ClipData;
-import android.content.ClipboardManager;
-import android.content.ComponentName;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.content.SharedPreferences;
-import android.content.DialogInterface.OnClickListener;
-import android.content.IntentSender.SendIntentException;
-import android.content.pm.PackageManager;
-import android.content.pm.ResolveInfo;
-import android.content.res.Resources;
-import android.content.Intent;
-import android.content.ServiceConnection;
-import android.graphics.Bitmap;
-import android.graphics.drawable.BitmapDrawable;
-import android.graphics.drawable.Drawable;
-import android.net.Uri;
-import android.nfc.NfcAdapter;
-import android.os.AsyncTask;
-import android.os.Bundle;
-import android.os.IBinder;
-import android.preference.PreferenceManager;
-import android.text.InputType;
-import android.util.DisplayMetrics;
-import android.util.Log;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.inputmethod.InputMethodManager;
-import android.widget.EditText;
-import android.widget.ImageView;
 
 public abstract class XmppActivity extends Activity {
 
@@ -196,6 +210,9 @@ public abstract class XmppActivity extends Activity {
 			case android.R.id.home:
 				finish();
 				break;
+			case R.id.action_show_qr_code:
+				showQrCode();
+				break;
 		}
 		return super.onOptionsItemSelected(item);
 	}
@@ -544,12 +561,68 @@ public abstract class XmppActivity extends Activity {
 		return false;
 	}
 
-	protected void registerNdefPushMessageCallback(NfcAdapter.CreateNdefMessageCallback callback) {
+	protected void registerNdefPushMessageCallback() {
-		if (android.os.Build.VERSION.SDK_INT >= 16) {
 			NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
 			if (nfcAdapter != null && nfcAdapter.isEnabled()) {
-				nfcAdapter.setNdefPushMessageCallback(callback, this);
+				nfcAdapter.setNdefPushMessageCallback(new NfcAdapter.CreateNdefMessageCallback() {
+					@Override
+					public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
+						NdefMessage msg = new NdefMessage(new NdefRecord[]{
+								NdefRecord.createUri(getShareableUri()),
+								NdefRecord.createApplicationRecord("eu.siacs.conversations")
+						});
+						return msg;
 					}
+				}, this);
+			}
+	}
+
+	protected void unregisterNdefPushMessageCallback() {
+		NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
+		if (nfcAdapter != null && nfcAdapter.isEnabled()) {
+			nfcAdapter.setNdefPushMessageCallback(null,this);
+		}
+	}
+
+	protected String getShareableUri() {
+		return null;
+	}
+
+	protected void showQrCode() {
+		String uri = getShareableUri();
+		if (uri!=null) {
+			Point size = new Point();
+			getWindowManager().getDefaultDisplay().getSize(size);
+			final int width = (size.x < size.y ? size.x : size.y);
+			Bitmap bitmap = createQrCodeBitmap(uri, width);
+			ImageView view = new ImageView(this);
+			view.setImageBitmap(bitmap);
+			AlertDialog.Builder builder = new AlertDialog.Builder(this);
+			builder.setView(view);
+			builder.create().show();
+		}
+	}
+
+	protected Bitmap createQrCodeBitmap(String input, int size) {
+		try {
+			final QRCodeWriter QR_CODE_WRITER = new QRCodeWriter();
+			final Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
+			hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
+			final BitMatrix result = QR_CODE_WRITER.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
+			final int width = result.getWidth();
+			final int height = result.getHeight();
+			final int[] pixels = new int[width * height];
+			for (int y = 0; y < height; y++) {
+				final int offset = y * width;
+				for (int x = 0; x < width; x++) {
+					pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
+				}
+			}
+			final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+			bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+			return bitmap;
+		} catch (final WriterException e) {
+			return null;
 		}
 	}
 

src/main/res/menu/contact_details.xml

@@ -13,6 +13,10 @@
         android:orderInCategory="10"
         android:showAsAction="always"
         android:title="@string/action_delete_contact"/>
+    <item
+        android:id="@+id/action_show_qr_code"
+        android:title="@string/show_qr_code"
+        android:showAsAction="never" />
     <item
         android:id="@+id/action_accounts"
         android:orderInCategory="90"

src/main/res/menu/muc_details.xml

@@ -7,6 +7,10 @@
         android:orderInCategory="10"
         android:showAsAction="always"
         android:title="@string/action_edit_subject"/>
+    <item
+        android:id="@+id/action_show_qr_code"
+        android:title="@string/show_qr_code"
+        android:showAsAction="never" />
     <item
         android:id="@+id/action_accounts"
         android:orderInCategory="90"