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POCan't cancel Bluetooth discovery process
 

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    <p>I need to do a scan of bluetooth devices in the surrounding area for 6 to 12 seconds. After this time I need to stop the discovery of new devices.</p> <p>The following code should:</p> <ul> <li>Start scanning for bluetooth devices</li> <li>Print out any which are found</li> <li>After 6 seconds, cancel all discovery and repeat process</li> </ul> <p>The problem is that the bluetooth discovery is never cancelled. After this code runs for a minute or two, <strong>onReceive will get called tens of times in the same second...</strong> </p> <pre><code>public void startTrackingButton(View view) { Log.d("MAIN", "Track button pressed, isTracking: " + !isTracking); if (isTracking) { isTracking = false; } else { isTracking = true; Thread keepScanning = new Thread(new Runnable() { @Override public void run() { while (isTracking) { if (mBluetoothAdapter.isDiscovering()) { Log.d("MAIN", "Cancelling discovery!"); Log.d("MAIN", String.valueOf(mBluetoothAdapter.cancelDiscovery() + ":" + mBluetoothAdapter.getState())); mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); } startTracking(); try { Thread.sleep(6000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }); keepScanning.start(); } } private void startTracking() { Log.d("MAIN", "Starting Discovery..."); mBluetoothAdapter.startDiscovery(); // Create a BroadcastReceiver for ACTION_FOUND BroadcastReceiver mReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { Log.d("MAIN", "Device Found..."); String action = intent.getAction(); // When discovery finds a device if (BluetoothDevice.ACTION_FOUND.equals(action)) { // Get the BluetoothDevice object from the Intent BluetoothDevice device = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); // Add the name and address to an array adapter to show in a // ListView Log.d("MAIN:", device.getName() + "\n" + device.getAddress()); } } }; // Register the BroadcastReceiver IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); registerReceiver(mReceiver, filter); // Don't forget to unregister // during onDestroy } </code></pre> <p>Here is my logcat output:</p> <pre><code>//onReceive gets called many times in the same second??? 05-01 22:09:56.949: D/MAIN(3757): Cancelling discovery! 05-01 22:09:56.969: D/MAIN(3757): false:12 ///THIS SHOULD BE TRUE 05-01 22:09:56.969: D/MAIN(3757): Starting Discovery... 05-01 22:10:03.009: D/MAIN(3757): Starting Discovery... 05-01 22:10:03.579: D/MAIN(3757): Device Found... 05-01 22:10:03.579: D/MAIN:(3757): TOMSELLECK 05-01 22:10:03.579: D/MAIN:(3757): 06:07:08:09:A1:A1 05-01 22:10:03.579: D/MAIN(3757): Device Found... 05-01 22:10:03.579: D/MAIN:(3757): TOMSELLECK 05-01 22:10:03.579: D/MAIN:(3757): 06:07:08:09:A1:A1 05-01 22:10:03.589: D/MAIN(3757): Device Found... 05-01 22:10:03.589: D/MAIN:(3757): TOMSELLECK 05-01 22:10:03.589: D/MAIN:(3757): 06:07:08:09:A1:A1 05-01 22:10:03.589: D/MAIN(3757): Device Found... 05-01 22:10:03.589: D/MAIN:(3757): TOMSELLECK 05-01 22:10:03.589: D/MAIN:(3757): 06:07:08:09:A1:A1 05-01 22:10:03.589: D/MAIN(3757): Device Found... 05-01 22:10:03.589: D/MAIN:(3757): TOMSELLECK 05-01 22:10:03.589: D/MAIN:(3757): 06:07:08:09:A1:A1 </code></pre> <p><strong>Does anybody know how I can properly cancel all current and pending Bluetooth discovery??</strong></p> <p>Thanks for your help!</p> <p>P.S The reason I need to repeat the process is to get fresh signal strength values from nearby devices.</p>
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