private BluetoothAdapter mBluetoothAdapter;
private WifiManager mWifiManager;
- private BluetoothLeScanner mBLEScanner;
+ @Nullable private BluetoothLeScanner mBLEScanner;
private ScanSettings mDefaultScanSettings = new ScanSettings.Builder().build();
private List<DeviceFilter<?>> mFilters;
mBluetoothAdapter.startDiscovery();
}
- if (shouldScan(mBLEFilters)) {
+ if (shouldScan(mBLEFilters) && mBLEScanner != null) {
mBLEScanCallback = new BLEScanCallback();
mBLEScanner.startScan(mBLEScanFilters, mDefaultScanSettings, mBLEScanCallback);
}
unregisterReceiver(mBluetoothBroadcastReceiver);
mBluetoothBroadcastReceiver = null;
}
- mBLEScanner.stopScan(mBLEScanCallback);
+ if (mBLEScanner != null) mBLEScanner.stopScan(mBLEScanCallback);
if (mWifiBroadcastReceiver != null) {
unregisterReceiver(mWifiBroadcastReceiver);
mWifiBroadcastReceiver = null;