我开发了一个应用程序，它使用特定的蓝牙模块（HC-06）进行通信，但首先需要将其配对，使用以下代码进行配对...
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
ListView lView;
ArrayList<String> devNameList, devAddressList;
private ListAdapter arrayAdapter;
private ConnectThread mConnectThread;
private BluetoothSocket mmSocket = null;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private final static int REQUEST_ID = 2;
// Create a BroadcastReceiver for ACTION_FOUND.
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 = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
String devName = device.getName();
String devAddress = device.getAddress();
devAddressList.add(devAddress);
if (devName == null){
devName = device.getAddress();
}
devNameList.add(devName);
lView.setAdapter(arrayAdapter);
}
}
};
private class ConnectThread extends Thread {
ConnectThread(BluetoothDevice device) {
BluetoothSocket tmp = null;
try {
// Get a BluetoothSocket to connect with the given BluetoothDevice.
// MY_UUID is the app's UUID string, also used in the server code.
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
Toast.makeText(getBaseContext(), "ERROR: Socket's create() method failed", Toast.LENGTH_SHORT).show();
}
mmSocket = tmp;
}
public void run() {
try {
// Connect to the remote device through the socket. This call blocks
// until it succeeds or throws an exception.
mmSocket.connect();
} catch (IOException connectException) {
// Unable to connect; close the socket and return.
try {
mmSocket.close();
} catch (IOException closeException) {
Toast.makeText(getBaseContext(), "ERROR: Could not close the client socket",
Toast.LENGTH_SHORT).show();
}
return;
}
// The connection attempt succeeded. Perform work associated with
// the connection in a separate thread.
manageMyConnectedSocket();
}
// Closes the client socket and causes the thread to finish.
void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Toast.makeText(getBaseContext(), "ERROR: Could not close the client socket",
Toast.LENGTH_SHORT).show();
}
}
}
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_new_device);
requestPermissions();
lView = findViewById(R.id.discList);
devNameList = new ArrayList<>();
devAddressList = new ArrayList<>();
arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, devNameList);
if (mBluetoothAdapter.isDiscovering()){
mBluetoothAdapter.cancelDiscovery();
}
// Register for broadcasts when a device is discovered.
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
mBluetoothAdapter.startDiscovery();
lView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String devName = devNameList.get(position);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
if((Objects.equals(devName, "HC-06"))|| (Objects.equals(devName, "00:21:13:00:97:6A"))){
Toast.makeText(AddNewDevice.this, "Please wait...", Toast.LENGTH_SHORT).show();
mBluetoothAdapter.cancelDiscovery();
String address = devAddressList.get(position);
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
mConnectThread = new ConnectThread(device);
mConnectThread.run();
}
else{
Toast.makeText(AddNewDevice.this, "Please connect to an HC-06 device.", Toast.LENGTH_SHORT).show();
}
}
else {
if("HC-06".equals(devName) || "00:21:13:00:97:6A".equals(devName)){
Toast.makeText(AddNewDevice.this, "Please wait...", Toast.LENGTH_SHORT).show();
mBluetoothAdapter.cancelDiscovery();
String address = devAddressList.get(position);
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
mConnectThread = new ConnectThread(device);
mConnectThread.run();
}
else{
Toast.makeText(AddNewDevice.this, "Please connect to an HC-06 device.", Toast.LENGTH_SHORT).show();
}
}
}
});
}
private void requestPermissions(){
int androidVersion = Build.VERSION.SDK_INT;
if (androidVersion >= 23){
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION,
}, REQUEST_ID);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(mReceiver);
mBluetoothAdapter.cancelDiscovery();
}
private void manageMyConnectedSocket() {
mConnectThread.cancel();
finish();
}
这段代码在运行API 17（Android 4.2.2）的设备上表现良好，但在API 23（Android 6.0）的设备上有些小问题：
首先，有时它能够找到设备名称，有时则不能（这就是为什么我在设备列表[devNameList]中的第50和51行[如果您复制了该代码]添加了一个getAddress行而不是getName，在没有导入头文件的情况下的23和24行）。
其次，当它无法获取设备名称并且我尝试连接时，它会努力配对/连接设备（在我的蓝牙设置中，它只显示“配对...”直到永远），但当它成功获取设备名称时，则可以正确地配对。
有人能帮我解决这个问题吗？