设备无法识别蓝牙连接

Question

我目前正在开发一个涉及两个设备之间的bluetooth连接的应用程序。当我单击连接时，另一部电话显示它已连接，但我的电话未连接。

 public void connectToDevice(BluetoothDevice device){
    try {
        Toast.makeText(connectpage.this, "creating socket", Toast.LENGTH_SHORT).show();
        UUID ui=UUID.fromString("00001112-0000-1000-8000-00805F9B34FB");
        mmSocket = device.createRfcommSocketToServiceRecord(ui);
        mBluetoothAdapter.cancelDiscovery();


    } catch (IOException e){}

    try{
        Toast.makeText(connectpage.this, "pre-connection", Toast.LENGTH_SHORT).show();
        mmSocket.connect();
        flag=1;
        Toast.makeText(connectpage.this, "post-connection", Toast.LENGTH_SHORT).show();
        ConnectedThread(mmSocket);


        //byte[] connv=convby();
        String s="hii";
        try{write(s.getBytes());
        }catch(Exception e){Toast.makeText(connectpage.this, "error in write", Toast.LENGTH_SHORT).show();}

    } catch (IOException e){

        try{
            mmSocket.close();
            Toast.makeText(connectpage.this, "error", Toast.LENGTH_SHORT).show();
        } catch (IOException exception){}
    }
}