<分区>
我按照官方的例子写了这个程序
public class BluetoothActivity extends AppCompatActivity {
private static final long SCANNING_TIMEOUT = 5000; /* 5 seconds */
private static final int ENABLE_BT_REQUEST_ID = 1;
private BleWrapper mBleWrapper = null;
private boolean mScanning = false;
private Handler mHandler = new Handler();
private BluetoothAdapter mBluetoothAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bluetooth);
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
Toast.makeText(this, "no ble", Toast.LENGTH_SHORT).show();
finish();
}
final BluetoothManager bluetoothManager =
(BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = bluetoothManager.getAdapter();
if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
scanLeDevice(true);
}
private BluetoothAdapter.LeScanCallback mLeScanCallback =
new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(final BluetoothDevice device, int rssi,
byte[] scanRecord) {
Log.v("ble",device.getName());
}
};
// Stops scanning after 10 seconds.
private static final long SCAN_PERIOD = 3000;
private void scanLeDevice(final boolean enable) {
if (enable) {
// Stops scanning after a pre-defined scan period.
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
mScanning = false;
mBluetoothAdapter.stopLeScan(mLeScanCallback);
}
}, SCAN_PERIOD);
mScanning = true;
mBluetoothAdapter.startLeScan(mLeScanCallback);
} else {
mScanning = false;
mBluetoothAdapter.stopLeScan(mLeScanCallback);
}
}
}
这是 manifests.xml 中的权限
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
但是我还是遇到了这个异常
03-24 15:52:01.126 2223-2236/com.test W/Binder: Caught a RuntimeException from the binder stub implementation.
03-24 15:52:01.126 2223-2236/com.test W/Binder: java.lang.SecurityException: Need ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission to get scan results
如何让BLE在Android 6上工作，我的设备Android版本是6.0.1
为什么我添加了该权限，仍然出现异常？