Java Code Examples for android.bluetooth.BluetoothAdapter#getBluetoothLeScanner()

private void startScan(PublishSubject scanDataSubject) {
  BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
  if (adapter != null && adapter.isEnabled()) {
    // Setting service uuid scan filter failing on Galaxy S6 on Android 7.
    // Other devices and versions of Android have additional issues with Scan Filters.
    // Manually filter on scan operation.  Add a dummy filter to avoid Android 8.1+ enforcement
    // of filters during background scanning.
    List<ScanFilter> filters = new ArrayList<>();
    ScanFilter.Builder scanFilterBuilder = new ScanFilter.Builder();
    filters.add(scanFilterBuilder.build());

    ScanSettings.Builder settingsBuilder = new ScanSettings.Builder();
    settingsBuilder.setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY);

    BluetoothLeScanner bleScanner = adapter.getBluetoothLeScanner();
    if (bleScanner != null) {
      bleScanner.startScan(filters, settingsBuilder.build(), scanCallback);
    } else {
      if (RxCentralLogger.isError()) {
        RxCentralLogger.error("startScan - BluetoothLeScanner is null!");
      }

      scanDataSubject.onError(new ConnectionError(SCAN_FAILED));
    }
  } else {
    if (RxCentralLogger.isError()) {
      if (adapter == null) {
        RxCentralLogger.error("startScan - Default Bluetooth Adapter is null!");
      } else {
        RxCentralLogger.error("startScan - Bluetooth Adapter is disabled.");
      }
    }

    scanDataSubject.onError(new ConnectionError(SCAN_FAILED));
  }

}
 

@RequiresPermission(Manifest.permission.BLUETOOTH_ADMIN)
/* package */ void stopScanInternal(@NonNull final Context context,
									@NonNull final PendingIntent callbackIntent) {
	final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
	final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
	if (scanner == null)
		throw new IllegalStateException("BT le scanner not available");

	final PendingIntent pendingIntent = createStoppingPendingIntent(context, callbackIntent);
	scanner.stopScan(pendingIntent);

	synchronized (wrappers) {
		// Do not remove the key, just set the value to null.
		// Based on that we will know that scanning has been stopped.
		// This is used to discard scanning results delivered after the scan was stopped.
		// Unfortunately, the callbackIntent will have to be kept and won't he removed,
		// despite the fact that reports will eventually stop being broadcast.
		wrappers.put(callbackIntent, null);
	}
}
 

@Override
public void onScanResult(int callbackType, ScanResult result)
{
    //String bleDeviceAddress = getSharedPref().getString("bluetoothDeviceAddress", "unknown");
    //String devName = device.getName() + " [" + device.getAddress() + "]";
    //PodEmuLog.debug("SIBLE: device found - " + devName);

    BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
    BluetoothLeScanner bluetoothLeScanner = adapter.getBluetoothLeScanner();
    //Do the work below on a worker thread instead!
    bleDevice = result.getDevice();

    bluetoothLeScanner.stopScan(this);
    setState(STATE_CONNECTING);

    bleGATT = bleDevice.connectGatt(baseContext, false, bleGattCallback);
    bleGATT.requestConnectionPriority(BluetoothGatt.CONNECTION_PRIORITY_HIGH);

}
 

@Override
@RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADMIN, Manifest.permission.BLUETOOTH})
	/* package */ void startScanInternal(@NonNull final List<ScanFilter> filters,
										 @NonNull final ScanSettings settings,
										 @NonNull final Context context,
										 @NonNull final PendingIntent callbackIntent) {
	final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
	final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
	if (scanner == null)
		throw new IllegalStateException("BT le scanner not available");

	final Intent service = new Intent(context, ScannerService.class);
	service.putParcelableArrayListExtra(ScannerService.EXTRA_FILTERS, new ArrayList<>(filters));
	service.putExtra(ScannerService.EXTRA_SETTINGS, settings);
	service.putExtra(ScannerService.EXTRA_PENDING_INTENT, callbackIntent);
	service.putExtra(ScannerService.EXTRA_START, true);
	context.startService(service);
}
 

@Override
@RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADMIN, Manifest.permission.BLUETOOTH})
/* package */ void stopScanInternal(@NonNull final ScanCallback callback) {
	ScanCallbackWrapperLollipop wrapper;
	synchronized (wrappers) {
		wrapper = wrappers.remove(callback);
	}
	if (wrapper == null)
		return;

	wrapper.close();

	final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
	if (adapter != null) {
		final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
		if (scanner != null)
			scanner.stopScan(wrapper.nativeCallback);
	}
}
 

private void init() {
    Log.v(TAG, "DalvikBle, init");
    boolean fineloc = Util.verifyPermissions(Manifest.permission.ACCESS_FINE_LOCATION);
    if (!fineloc) {
        Log.v(TAG, "No permission to get fine location");
    }
    final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
    if (!adapter.isEnabled()) {
        Log.v(TAG, "DalvikBle, init, adapter not enabled");
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        IntentHandler intentHandler = new IntentHandler() {
            @Override
            public void gotActivityResult (int requestCode, int resultCode, Intent intent) {
                if (requestCode == REQUEST_ENABLE_BT && resultCode == RESULT_OK) {
                    scanner = adapter.getBluetoothLeScanner();
                }
            }
        };

        if (activity == null) {
            LOG.log(Level.WARNING, "Activity not found. This service is not allowed when "
                    + "running in background mode or from wearable");
            return;
        }
        Util.setOnActivityResultHandler(intentHandler);

        // A dialog will appear requesting user permission to enable Bluetooth
        activity.startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);

    } else {
        scanner = adapter.getBluetoothLeScanner();
    }

}
 

public void startScan(final Context context) {
    if (DEBUG) {
        Log.d(TAG, "startScan()");
        Log.d(TAG, "context : " + context);
    }
    synchronized (mLock) {
        BluetoothManager bluetoothManager = ((BluetoothManager) context.getSystemService(Context.BLUETOOTH_SERVICE));
        if (bluetoothManager != null) {
            BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter();
            mBluetoothLeScanner = bluetoothAdapter.getBluetoothLeScanner();
            if (!mIsScanning) {
                mIsScanning = true;
                mBluetoothLeScanner.startScan(mScanFilters, mScanSettings, mScanCallback);
                new Handler(Looper.getMainLooper()).postDelayed(this::stopScan, SCAN_PERIOD_MILLISECONDS);
            }
        }
    }
}
 

@Override
protected void onResume() {
    super.onResume();

    BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if (mBluetoothAdapter != null) {
        if (!mBluetoothAdapter.isEnabled()) mBluetoothAdapter.enable();
        mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();

        if (mBluetoothLeScanner == null) {
            mBluetoothAdapter.enable();
            mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
        }
        startScan();
    }
}
 

private void stopScan() {
  BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
  if (adapter != null && adapter.isEnabled()) {
    BluetoothLeScanner bleScanner = adapter.getBluetoothLeScanner();
    if (bleScanner != null) {
      bleScanner.stopScan(scanCallback);
    } else if (RxCentralLogger.isError()) {
      RxCentralLogger.error("stopScan - BluetoothLeScanner is null!");
    }
  } else if (RxCentralLogger.isError()) {
    if (adapter == null) {
      RxCentralLogger.error("stopScan - Default Bluetooth Adapter is null!");
    } else {
      RxCentralLogger.error("stopScan - Bluetooth Adapter is disabled.");
    }
  }
}
 

private void stopScan() {
  BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
  if (adapter != null && adapter.isEnabled()) {
    BluetoothLeScanner bleScanner = adapter.getBluetoothLeScanner();
    if (bleScanner != null) {
      bleScanner.stopScan(scanCallback);
    } else if (RxCentralLogger.isError()) {
      RxCentralLogger.error("stopScan - BluetoothLeScanner is null!");
    }
  } else if (RxCentralLogger.isError()) {
    if (adapter == null) {
      RxCentralLogger.error("stopScan - Default Bluetooth Adapter is null!");
    } else {
      RxCentralLogger.error("stopScan - Bluetooth Adapter is disabled.");
    }
  }

  scanDataSubject = null;
}
 

static void startScan(BluetoothAdapter adapter, ScanSettings scanSettings, ScanCallback listener) {
    m_UserScanCallback = listener;
    // Add a last ditch check to make sure the adapter isn't null before trying to start the scan.
    // We check in the task, but by the time we reach this method, it could have been shut off
    // Either the adapter, or the scanner object may be null, so we check it here
    if (adapter == null || adapter.getBluetoothLeScanner() == null)
    {
        m_callback.onScanFailed(android.bluetooth.le.ScanCallback.SCAN_FAILED_INTERNAL_ERROR);
        return;
    }
    adapter.getBluetoothLeScanner().startScan(null, scanSettings, m_callback);
}
 

@Override
@RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADMIN, Manifest.permission.BLUETOOTH})
/* package */ void startScanInternal(@Nullable final List<ScanFilter> filters,
									 @Nullable final ScanSettings settings,
									 @NonNull  final Context context,
									 @NonNull  final PendingIntent callbackIntent) {
	final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
	final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
	if (scanner == null)
		throw new IllegalStateException("BT le scanner not available");

	final ScanSettings nonNullSettings = settings != null ? settings : new ScanSettings.Builder().build();
	final List<ScanFilter> nonNullFilters = filters != null ? filters : Collections.<ScanFilter>emptyList();

	final android.bluetooth.le.ScanSettings nativeSettings = toNativeScanSettings(adapter, nonNullSettings, false);
	List<android.bluetooth.le.ScanFilter> nativeFilters = null;
	if (filters != null && adapter.isOffloadedFilteringSupported() && nonNullSettings.getUseHardwareFilteringIfSupported())
		nativeFilters = toNativeScanFilters(filters);

	synchronized (wrappers) {
		// Make sure there is not such callbackIntent in the map.
		// The value could have been set to null when the same intent was used before.
		wrappers.remove(callbackIntent);
	}

	final PendingIntent pendingIntent = createStartingPendingIntent(nonNullFilters,
			nonNullSettings, context, callbackIntent);
	scanner.startScan(nativeFilters, nativeSettings, pendingIntent);
}
 

public static void stopNativeScan(BluetoothAdapter adapter) {
    if (adapter == null)
    {
        Log.e("ScanManager", "Tried to stop the scan, but the Bluetooth Adapter instance was null!");
        return;
    }

    final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
    if (scanner != null)
        scanner.stopScan(m_callback);
    else
        Log.w("ScanManager", "Tried to stop the scan, but the BluetoothLeScanner instance was null. This implies the scanning has stopped already.");
}
 

@Override
@RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADMIN, Manifest.permission.BLUETOOTH})
/* package */ void startScanInternal(@NonNull final List<ScanFilter> filters,
									 @NonNull final ScanSettings settings,
									 @NonNull final ScanCallback callback,
									 @NonNull final Handler handler) {
	final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
	final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
	if (scanner == null)
		throw new IllegalStateException("BT le scanner not available");

	final boolean offloadedBatchingSupported = adapter.isOffloadedScanBatchingSupported();
	final boolean offloadedFilteringSupported = adapter.isOffloadedFilteringSupported();

	ScanCallbackWrapperLollipop wrapper;

	synchronized (wrappers) {
		if (wrappers.containsKey(callback)) {
			throw new IllegalArgumentException("scanner already started with given callback");
		}
		wrapper = new ScanCallbackWrapperLollipop(offloadedBatchingSupported,
				offloadedFilteringSupported, filters, settings, callback, handler);
		wrappers.put(callback, wrapper);
	}

	final android.bluetooth.le.ScanSettings nativeScanSettings = toNativeScanSettings(adapter, settings, false);
	List<android.bluetooth.le.ScanFilter> nativeScanFilters = null;
	if (!filters.isEmpty() && offloadedFilteringSupported && settings.getUseHardwareFilteringIfSupported())
		nativeScanFilters = toNativeScanFilters(filters);

	scanner.startScan(nativeScanFilters, nativeScanSettings, wrapper.nativeCallback);
}
 

private void startScan(int scanMode) {
  BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
  if (adapter != null && adapter.isEnabled()) {
    // Add a dummy filter to avoid Android 8.1+ enforcement of filters during background isScanning.
    List<ScanFilter> filters = new ArrayList<>();
    ScanFilter.Builder scanFilterBuilder = new ScanFilter.Builder();
    filters.add(scanFilterBuilder.build());

    ScanSettings.Builder settingsBuilder = new ScanSettings.Builder();
    settingsBuilder.setScanMode(scanMode);

    BluetoothLeScanner bleScanner = adapter.getBluetoothLeScanner();
    if (bleScanner != null) {
      bleScanner.startScan(filters, settingsBuilder.build(), scanCallback);
    } else {
      if (RxCentralLogger.isError()) {
        RxCentralLogger.error("startScan - BluetoothLeScanner is null!");
      }

      getErrorSubject().onError(new ConnectionError(SCAN_FAILED));
    }
  } else {
    if (RxCentralLogger.isError()) {
      if (adapter == null) {
        RxCentralLogger.error("startScan - Default Bluetooth Adapter is null!");
      } else {
        RxCentralLogger.error("startScan - Bluetooth Adapter is disabled.");
      }
    }

    getErrorSubject().onError(new ConnectionError(SCAN_FAILED));
  }
}
 

@Override
@RequiresPermission(Manifest.permission.BLUETOOTH)
public void flushPendingScanResults(@NonNull final ScanCallback callback) {
	final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
	//noinspection ConstantConditions
	if (callback == null) {
		throw new IllegalArgumentException("callback cannot be null!");
	}

	ScanCallbackWrapperLollipop wrapper;
	synchronized (wrappers) {
		wrapper = wrappers.get(callback);
	}

	if (wrapper == null) {
		throw new IllegalArgumentException("callback not registered!");
	}

	final ScanSettings settings = wrapper.scanSettings;
	if (adapter.isOffloadedScanBatchingSupported() && settings.getUseHardwareBatchingIfSupported()) {
		final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
		if (scanner == null)
			return;
		scanner.flushPendingScanResults(wrapper.nativeCallback);
	} else {
		wrapper.flushPendingScanResults();
	}
}
 

@TargetApi(21)
public void close()
{
    BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
    BluetoothLeScanner bluetoothLeScanner = adapter.getBluetoothLeScanner();
    bluetoothLeScanner.stopScan(new MyScanCallback());

    if(bleGATT!=null) bleGATT.close();
    bleGATT=null;
    bleDevice=null;
    bleScanThread=null;
    mInBuffer.removeAll();
    releaseWriteLock();
}
 

public static void stopNativeScan(BluetoothAdapter adapter) {
    if (adapter == null)
    {
        Log.e("ScanManager", "Tried to stop the scan, but the Bluetooth Adapter instance was null!");
        return;
    }

    final BluetoothLeScanner scanner = adapter.getBluetoothLeScanner();
    if (scanner != null)
        scanner.stopScan(m_callback);
    else
        Log.w("ScanManager", "Tried to stop the scan, but the BluetoothLeScanner instance was null. This implies the scanning has stopped already.");
}
 

static void startScan(BluetoothAdapter adapter, ScanSettings scanSettings, ScanCallback listener) {
    m_UserScanCallback = listener;
    // Add a last ditch check to make sure the adapter isn't null before trying to start the scan.
    // We check in the task, but by the time we reach this method, it could have been shut off
    // Either the adapter, or the scanner object may be null, so we check it here
    if (adapter == null || adapter.getBluetoothLeScanner() == null)
    {
        m_callback.onScanFailed(android.bluetooth.le.ScanCallback.SCAN_FAILED_INTERNAL_ERROR);
        return;
    }
    adapter.getBluetoothLeScanner().startScan(getFilterList(), scanSettings, m_callback);
}
 

@TargetApi(21)
    public synchronized boolean init(Context context)
    {
        PodEmuLog.debug("SIBLE: init()");

        if(bleScanThread!=null)
        {
            PodEmuLog.debug("SIBLE: bleScanThread already running. Skipping initialization.");
        }
        else if(bleDevice==null)
        {
            PodEmuLog.debug("SIBLE: starting new BLE scan");
            /*bleScanThread = new Thread(new Runnable()
            {
                @Override
                public void run()
                {
*/
            try
            {
                PodEmuLog.debug("SIBLE: BLE scan started.");
                ScanSettings scanSettings = new ScanSettings.Builder()
                        .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
                        .build();

                ScanFilter scanFilter = new ScanFilter.Builder()
                        .setDeviceName(getName())
                        .setDeviceAddress(getAddress())
                        .build();

                BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
                BluetoothLeScanner bluetoothLeScanner = adapter.getBluetoothLeScanner();
                bluetoothLeScanner.startScan(Collections.singletonList(scanFilter), scanSettings, new MyScanCallback());

                setState(STATE_SEARCHING);
                SerialInterface_BLE.this.wait();
                PodEmuLog.debug("SIBLE: wait finished");
            }
            catch (InterruptedException e)
            {
                PodEmuLog.debug("SIBLE: BLE scan interrupted");
            }
/*                }
            });
            bleScanThread.start();
  */      }
        else if(bleGATT == null)
        {
            PodEmuLog.debug("SIBLE: getting new GATT handler");
            bleGATT = bleDevice.connectGatt(baseContext, true, bleGattCallback);
            bleGATT.requestConnectionPriority(BluetoothGatt.CONNECTION_PRIORITY_HIGH);
        }

        return isConnected();
    }