Question

我试图将我的Android设备与蓝牙兼容设备连接。我知道这个设备的mac-address，你可以在下面的代码中看到。我还做了几个Toasts只是为了验证代码中的步骤。似乎我设法创建tmp = device.createRfcommSocketToServiceRecord(MY_UUID);我假设这是因为Toast在这行代码中引发了一条消息说一些蓝牙对象地址：

String test = tmp.toString(); 
Toast.makeText(getApplicationContext(), "The bluetooth socket: " +test, Toast.LENGTH_LONG).show();

但是当我执行tmp.connect();时，代码在语义上失效我正在使用API级别15，android 4.0

这是我的代码

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;  
import java.util.UUID;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class SimpleConnectAndroidActivity extends Activity {

final static String toast = "IAM HERE"; 

final static String TAG ="SimpleConnect";
UUID MY_UUID;

BluetoothDevice bd;
BluetoothAdapter ba;

Button connectButton;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");

    ba = BluetoothAdapter.getDefaultAdapter();

    connectButton = (Button)findViewById(R.id.button1);
    connectButton.setOnClickListener(new OnClickListener() {

        public void onClick(View arg0) {

            boolean b = ba.checkBluetoothAddress("00:1B:DC:0F:EC:7E");
            BluetoothSocket tmp = null; 

            //If valid bluetoothAddress
            if(b) {
                final BluetoothDevice device = ba.getRemoteDevice("00:1B:DC:0F:EC:7E"); //Getting the Verifier Bluetooth 

                //Trying to create a RFCOMM socket to the device
                try {
                    tmp = device.createRfcommSocketToServiceRecord(MY_UUID);

                } catch (IOException e) {

                }

                try {
                    tmp.connect();
                } catch (IOException e) {
                    Toast.makeText(getApplicationContext(), "No connection was made! Exception: " + e.getMessage(), Toast.LENGTH_LONG).show();
                } 
                //Print out the sockets name
                String test = tmp.toString(); 
                Toast.makeText(getApplicationContext(), "The bluetooth socket: " +test, Toast.LENGTH_LONG).show(); 
            }


            else {
                    Toast.makeText(getApplicationContext(), "FALSE, No bluetooth device with this address", Toast.LENGTH_LONG).show();
                }
            }   
    });  
}

}

我知道这应该在一个单独的线程中完成，是的，我阅读了Google提供的蓝牙聊天示例。

有人可以帮帮我吗？

修改

这是我从LogCat获得的唯一内容：

07-06 10:10:22.085: V/BluetoothSocket.cpp(14019): ...fd 63 created (RFCOMM, lm = 26)

编辑2

好的，现在出现了一个新错误，但错误更好。当我按下连接按钮时，手机会询问设备配对的密码，但它已配对！在我第二次配对后，错误说：连接被拒绝，另一个例外是，超时。

Answer 1

您可以使用以下代码：Method m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class}); mySocket = (BluetoothSocket) m.invoke(device, 1);

连接到蓝牙设备，例外：服务发现失败

1 个答案: