Automatically enable/disable bluetooth as necessary for searching/connection.

Change-Id: Ie7a11c05cf1ba6181e955a65ebef03117c956f1a

android/sdremote/src/org/libreoffice/impressremote/communication/BluetoothClient.java

@@ -25,14 +25,22 @@ import android.support.v4.content.LocalBroadcastManager;
  */
 public class BluetoothClient extends Client {
 
+    private boolean mBluetoothWasEnabled;
+    private BluetoothAdapter mAdapter;
+
     public BluetoothClient(Server aServer,
                     CommunicationService aCommunicationService) {
         super(aServer, aCommunicationService);
         try {
-            BluetoothAdapter aAdapter = BluetoothAdapter.getDefaultAdapter();
-            BluetoothDevice aDevice = aAdapter.getRemoteDevice(aServer
+            mAdapter = BluetoothAdapter.getDefaultAdapter();
+            mBluetoothWasEnabled = mAdapter.isEnabled();
+            if (!mBluetoothWasEnabled) {
+                mAdapter.enable();
+            }
+
+            BluetoothDevice aDevice = mAdapter.getRemoteDevice(aServer
                             .getAddress());
-            aAdapter.cancelDiscovery();
+            mAdapter.cancelDiscovery();
             BluetoothSocket aSocket = aDevice
                             .createRfcommSocketToServiceRecord(UUID
                                             .fromString("00001101-0000-1000-8000-00805F9B34FB"));
@@ -115,5 +123,11 @@ public class BluetoothClient extends Client {
         //        }
     }
 
+    protected void onDisconnect() {
+        if (!mBluetoothWasEnabled) {
+            mAdapter.disable();
+        }
+    }
+
 }
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
\ No newline at end of file

android/sdremote/src/org/libreoffice/impressremote/communication/BluetoothFinder.java

@@ -31,12 +31,10 @@ public class BluetoothFinder {
         if (mAdapter == null) {
             return; // No bluetooth adapter found (emulator, special devices)
         }
-        System.out.println("BT:Discovery starting");
         IntentFilter aFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
         aFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
+        aFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
         mContext.registerReceiver(mReceiver, aFilter);
-
-        mAdapter.enable();
         mAdapter.startDiscovery();
     }
 
@@ -62,31 +60,35 @@ public class BluetoothFinder {
 
         @Override
         public void onReceive(Context context, Intent aIntent) {
-            // TODO Auto-generated method stub
             if (aIntent.getAction().equals(BluetoothDevice.ACTION_FOUND)) {
+                System.out.println("Found");
                 BluetoothDevice aDevice = (BluetoothDevice) aIntent.getExtras()
                                 .get(BluetoothDevice.EXTRA_DEVICE);
                 Server aServer = new Server(Protocol.BLUETOOTH,
                                 aDevice.getAddress(), aDevice.getName(),
                                 System.currentTimeMillis());
                 mServerList.put(aServer.getAddress(), aServer);
-                System.out.println("Added " + aServer.getName());
-                System.out.println("Now we have: " + mServerList.size());
                 Intent aNIntent = new Intent(
                                 CommunicationService.MSG_SERVERLIST_CHANGED);
                 LocalBroadcastManager.getInstance(mContext).sendBroadcast(
                                 aNIntent);
             } else if (aIntent.getAction().equals(
-                            BluetoothAdapter.ACTION_DISCOVERY_FINISHED)) {
+                            BluetoothAdapter.ACTION_DISCOVERY_FINISHED)
+                            || aIntent.getAction()
+                                            .equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
                 // Start discovery again after a small delay.
-                Handler aHandler = new Handler();
-                aHandler.postDelayed(new Runnable() {
-                    @Override
-                    public void run() {
-                        mAdapter.startDiscovery();
-                    }
-                }, 1000 * 15);
-                ;
+                // but check whether device is on incase the user manually
+                // disabled bluetooth
+                if (mAdapter.isEnabled()) {
+                    Handler aHandler = new Handler();
+                    aHandler.postDelayed(new Runnable() {
+                        @Override
+                        public void run() {
+                            System.out.println("Looping");
+
+                        }
+                    }, 1000 * 15);
+                }
             }
 
         }

android/sdremote/src/org/libreoffice/impressremote/communication/Client.java

@@ -95,6 +95,7 @@ public abstract class Client {
             e1.printStackTrace();
         } finally {
             latestInstance = null;
+            onDisconnect();
         }
 
     }
@@ -108,10 +109,7 @@ public abstract class Client {
     }
 
     /**
-     * Send a valid JSON string to the server.
-     *
-     * @param command
-     *            Must be a valid JSON string.
+     * Send a valid command to the Server.
      */
     public void sendCommand(String command) {
         try {
@@ -125,5 +123,12 @@ public abstract class Client {
         }
     }
 
+    /**
+     * Called after the Client disconnects. Can be extended to allow for
+     * cleaning up bluetooth properties etc.
+     */
+    protected void onDisconnect() {
+    }
+
 }
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
\ No newline at end of file

android/sdremote/src/org/libreoffice/impressremote/communication/CommunicationService.java

@@ -102,14 +102,29 @@ public class CommunicationService extends Service implements Runnable {
 
     }
 
+    private boolean mBluetoothPreviouslyEnabled;
+
     public void startSearching() {
         mNetworkFinder.startFinding();
-        mBluetoothFinder.startFinding();
+        BluetoothAdapter aAdapter = BluetoothAdapter.getDefaultAdapter();
+        if (aAdapter != null) {
+            mBluetoothPreviouslyEnabled = aAdapter.isEnabled();
+            if (!mBluetoothPreviouslyEnabled)
+                aAdapter.enable();
+            mBluetoothFinder.startFinding();
+        }
     }
 
     public void stopSearching() {
         mNetworkFinder.stopFinding();
         mBluetoothFinder.stopFinding();
+        BluetoothAdapter aAdapter = BluetoothAdapter.getDefaultAdapter();
+        if (aAdapter != null) {
+            if (!mBluetoothPreviouslyEnabled) {
+
+                aAdapter.disable();
+            }
+        }
     }
 
     public void connectTo(Server aServer) {