java - 用于发现蓝牙设备不工作的广播接收器

Question

您好，我已按照 https://developer.android.com/guide/topics/connectivity/bluetooth 中的示例进行操作我的广播接收器可能无法正常工作。我在我的 Android 小米 A1 设备上运行 Android 8.1。

@Override
protected void onCreate(Bundle savedInstanceState) {
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    registerReceiver(mReceiver, filter);
    bluetoothAdapter.startDiscovery();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            // Discovery has found a device. Get the BluetoothDevice
            // object and its info from the Intent.
            BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            String deviceName = device.getName();
            String deviceHardwareAddress = device.getAddress(); // MAC address
            Toast.makeText(MainActivity.this, deviceName, Toast.LENGTH_SHORT).show();
            Toast.makeText(MainActivity.this, deviceHardwareAddress, Toast.LENGTH_SHORT).show();
            mDeviceList.add(deviceHardwareAddress);
            ArrayAdapter arrayAdapter = new ArrayAdapter(MainActivity.this,android.R.layout.simple_list_item_1,mDeviceList);
            listV.setAdapter(arrayAdapter);
        }
    }
};

谢谢!

注意

对于 Android Api 21 广播接收器工作正常，我需要进行哪些更改才能使其适用于 Android 8.1？

Answer 1

在 list 中，我已添加权限和其他服务，例如启动停止蓝牙并查找配对设备工作正常...

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />