小编Blu*_*ite的帖子

所以我正在编写一个使用蓝牙发现设备的 Android 应用程序。这是我用来开始发现的代码。

try {
    myBluetoothAdapter.startDiscovery();
    Log.d("Bluetooth Started successfully","yes");
} catch (Error e) {
    Log.d("FAILED","Ya failed mate");
    e.printStackTrace();
}

然后，我注册一个 BroadcastReceiver 以监视何时找到设备。这是我的代码

IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
final ArrayList<String> stringArrayList = new ArrayList<>();
final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(getApplicationContext(),android.R.layout.simple_list_item_1,stringArrayList);
final ListView listView = findViewById(R.id.listView);
listView.setAdapter(arrayAdapter);
BroadcastReceiver myReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();
    Log.d("ACTION RECEIVED","Action was received");
    Log.d("Device Name", String.valueOf(intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE)));
    if (BluetoothDevice.ACTION_FOUND.equals(action)) {
        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
        stringArrayList.add(device.getName());
        arrayAdapter.notifyDataSetChanged();
        listView.invalidateViews(); …