检查耳机是否已在Android应用程序中连接。 蓝牙和有线

Question

I am developing a simple application and I need to track headset connection. Here is the part of the code.

In onCreate method there is a broadcastReceiver. It works perfect with wired headphones.

Then I added an if-else condition for a bluetooth headset. If the headset is already connected when I start the app it shows that it is connected. It's ok. But when I turn off the bluetooth and plug in wired headphones, I receive a Toast from a bluetooth if-else: bl headset disconn. Why it does not catch the Headset Plug In Action?

public class MainActivity extends AppCompatActivity {

    BroadcastReceiver broadcastReceiver;
    boolean Microphone_Plugged_in = false;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        broadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                final String action = intent.getAction();
                int c;
                if (Intent.ACTION_HEADSET_PLUG.equals(action)) {
                    c = intent.getIntExtra("state", -1);
                    if (c == 0) {
                        Microphone_Plugged_in = false;
                        Toast.makeText(getApplicationContext(), "headset is not plugged in", Toast.LENGTH_LONG).show();
                    }
                    if (c == 1) {
                        Microphone_Plugged_in = true;
                        Toast.makeText(getApplicationContext(), "headset is plugged in", Toast.LENGTH_LONG).show();
                    }
                }

                BluetoothAdapter BA;
                BA = BluetoothAdapter.getDefaultAdapter();

                if (BA != null && BluetoothProfile.STATE_CONNECTED == BA.getProfileConnectionState(BluetoothProfile.HEADSET))
                {
                    Microphone_Plugged_in = true;
                    Toast.makeText(getApplicationContext(), "bl headset connected", Toast.LENGTH_LONG).show();
                }
                else {
                    Microphone_Plugged_in = false;
                    Toast.makeText(getApplicationContext(), "bl headset disconn", Toast.LENGTH_LONG).show();
                }


            }
        };
        IntentFilter receiverFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
        registerReceiver(broadcastReceiver, receiverFilter);

Thank you

Answer 1

I am developing a simple application and I need to track headset connection. Here is the part of the code.

In onCreate method there is a broadcastReceiver. It works perfect with wired headphones.

Then I added an if-else condition for a bluetooth headset. If the headset is already connected when I start the app it shows that it is connected. It's ok. But when I turn off the bluetooth and plug in wired headphones, I receive a Toast from a bluetooth if-else: bl headset disconn. Why it does not catch the Headset Plug In Action?

public class MainActivity extends AppCompatActivity {

    BroadcastReceiver broadcastReceiver;
    boolean Microphone_Plugged_in = false;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        broadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                final String action = intent.getAction();
                int c;
                if (Intent.ACTION_HEADSET_PLUG.equals(action)) {
                    c = intent.getIntExtra("state", -1);
                    if (c == 0) {
                        Microphone_Plugged_in = false;
                        Toast.makeText(getApplicationContext(), "headset is not plugged in", Toast.LENGTH_LONG).show();
                    }
                    if (c == 1) {
                        Microphone_Plugged_in = true;
                        Toast.makeText(getApplicationContext(), "headset is plugged in", Toast.LENGTH_LONG).show();
                    }
                }

                BluetoothAdapter BA;
                BA = BluetoothAdapter.getDefaultAdapter();

                if (BA != null && BluetoothProfile.STATE_CONNECTED == BA.getProfileConnectionState(BluetoothProfile.HEADSET))
                {
                    Microphone_Plugged_in = true;
                    Toast.makeText(getApplicationContext(), "bl headset connected", Toast.LENGTH_LONG).show();
                }
                else {
                    Microphone_Plugged_in = false;
                    Toast.makeText(getApplicationContext(), "bl headset disconn", Toast.LENGTH_LONG).show();
                }


            }
        };
        IntentFilter receiverFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
        registerReceiver(broadcastReceiver, receiverFilter);

Thank you