相关疑难解决方法(0)

我在Android应用程序中创建了一个蓝牙活动类,它适用于所有蓝牙功能,如:扫描,配对,连接,发送和接收数据.

真正的问题是当Activity被销毁时.蓝牙正在断开连接.

如何在整个应用程序中建立蓝牙连接.我想从其他活动向蓝牙发送数据.

帮助我以简单的方式实现这一点？

public class BTActivity extends AppCompatActivity {

ArrayList<BluetoothDevice> devices = new ArrayList<>();
BluetoothAdapter mBluetoothAdapter;
BluetoothDevice mBluetoothDevice;
ArrayAdapter<BluetoothDevice> arrayAdapter;

ConnectThread c;

private static final String TAG = "MY_BT";

ListView lvPaired;
Button BluetoothOnOff, ScanBt, pairedlist, sendButton, btDisconnect, incrementBtn, decrementBtn;
EditText input_text;
TextView ConnectedTo;

FragmentManager fm = getSupportFragmentManager();

UUID BHANU_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_bt);

    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    lvPaired = findViewById(R.id.btPairedLV);
    pairedlist = findViewById(R.id.btPaired);
    input_text = findViewById(R.id.user_input);
    sendButton = findViewById(R.id.btnSend);
    BluetoothOnOff = findViewById(R.id.offOn_bt);
    ScanBt = …