Add android beam support

Clover/app/src/main/AndroidManifest.xml

@@ -35,43 +35,26 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
             android:name=".ui.activity.BoardActivity"
             android:configChanges="keyboardHidden|orientation|screenSize"
             android:label="@string/app_name">
+
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
-            <intent-filter>
 
+            <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
                 <action android:name="android.nfc.action.NDEF_DISCOVERED" />
 
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
 
-                <data
-                    android:host="4chan.org"
-                    android:pathPrefix="/"
-                    android:scheme="http" />
-                <data
-                    android:host="4chan.org"
-                    android:pathPrefix="/"
-                    android:scheme="https" />
-                <data
-                    android:host="www.4chan.org"
-                    android:pathPrefix="/"
-                    android:scheme="http" />
-                <data
-                    android:host="www.4chan.org"
-                    android:pathPrefix="/"
-                    android:scheme="https" />
-                <data
-                    android:host="boards.4chan.org"
-                    android:pathPrefix="/"
-                    android:scheme="http" />
-                <data
-                    android:host="boards.4chan.org"
-                    android:pathPrefix="/"
-                    android:scheme="https" />
+                <data android:scheme="http" />
+                <data android:scheme="https" />
+                <data android:host="4chan.org" />
+                <data android:host="www.4chan.org" />
+                <data android:host="boards.4chan.org" />
             </intent-filter>
+
         </activity>
 
         <activity android:name=".test.TestActivity" />

Clover/app/src/main/java/org/floens/chan/ui/activity/StartActivity.java

@@ -21,6 +21,9 @@ import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.res.Configuration;
+import android.nfc.NdefMessage;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcEvent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.ViewGroup;
@@ -45,7 +48,7 @@ import org.floens.chan.utils.Logger;
 import java.util.ArrayList;
 import java.util.List;
 
-public class StartActivity extends AppCompatActivity {
+public class StartActivity extends AppCompatActivity implements NfcAdapter.CreateNdefMessageCallback {
     private static final String TAG = "StartActivity";
 
     private static final String STATE_KEY = "chan_state";
@@ -88,6 +91,11 @@ public class StartActivity extends AppCompatActivity {
         // Do this after setContentView, or the decor creating will reset the background to a default non-null drawable
         getWindow().setBackgroundDrawable(null);
 
+        NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);
+        if (adapter != null) {
+            adapter.setNdefPushMessageCallback(this, this);
+        }
+
         // Startup from background or url
         boolean loadDefault = true;
         if (savedInstanceState != null) {
@@ -173,6 +181,16 @@ public class StartActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public NdefMessage createNdefMessage(NfcEvent event) {
+        Controller controller = rootNavigationController.getTop();
+        if (controller instanceof NfcAdapter.CreateNdefMessageCallback) {
+            return ((NfcAdapter.CreateNdefMessageCallback) controller).createNdefMessage(event);
+        } else {
+            return null;
+        }
+    }
+
     public void addController(Controller controller) {
         stack.add(controller);
     }

Clover/app/src/main/java/org/floens/chan/ui/controller/ThreadController.java

@@ -18,23 +18,31 @@
 package org.floens.chan.ui.controller;
 
 import android.content.Context;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcEvent;
 import android.support.v4.widget.SwipeRefreshLayout;
 import android.view.LayoutInflater;
 
 import org.floens.chan.Chan;
 import org.floens.chan.R;
+import org.floens.chan.chan.ChanUrls;
 import org.floens.chan.controller.Controller;
 import org.floens.chan.core.model.Loadable;
 import org.floens.chan.core.model.PostImage;
 import org.floens.chan.ui.helper.RefreshUIMessage;
 import org.floens.chan.ui.layout.ThreadLayout;
 import org.floens.chan.ui.view.ThumbnailView;
+import org.floens.chan.utils.Logger;
 
 import java.util.List;
 
 import de.greenrobot.event.EventBus;
 
-public abstract class ThreadController extends Controller implements ThreadLayout.ThreadLayoutCallback, ImageViewerController.PreviewCallback, RootNavigationController.DrawerCallback, SwipeRefreshLayout.OnRefreshListener, RootNavigationController.ToolbarSearchCallback {
+public abstract class ThreadController extends Controller implements ThreadLayout.ThreadLayoutCallback, ImageViewerController.PreviewCallback, RootNavigationController.DrawerCallback, SwipeRefreshLayout.OnRefreshListener, RootNavigationController.ToolbarSearchCallback, NfcAdapter.CreateNdefMessageCallback {
+    private static final String TAG = "ThreadController";
+
     protected ThreadLayout threadLayout;
     private SwipeRefreshLayout swipeRefreshLayout;
 
@@ -98,6 +106,33 @@ public abstract class ThreadController extends Controller implements ThreadLayou
         threadLayout.refreshFromSwipe();
     }
 
+    @Override
+    public NdefMessage createNdefMessage(NfcEvent event) {
+        Loadable loadable = getLoadable();
+        String url = null;
+        NdefMessage message = null;
+
+        if (loadable != null) {
+            if (loadable.isThreadMode()) {
+                url = ChanUrls.getThreadUrlDesktop(loadable.board, loadable.no);
+            } else if (loadable.isCatalogMode()) {
+                url = ChanUrls.getCatalogUrlDesktop(loadable.board);
+            }
+        }
+
+        if (url != null) {
+            try {
+                Logger.d(TAG, "Pushing url " + url + " to android beam");
+                NdefRecord record = NdefRecord.createUri(url);
+                message = new NdefMessage(new NdefRecord[]{record});
+            } catch (IllegalArgumentException e) {
+                Logger.e(TAG, "NdefMessage create error", e);
+            }
+        }
+
+        return message;
+    }
+
     public void presentRepliesController(Controller controller) {
         presentController(controller);
     }