Java 恒定蓝牙配对

在点击按钮运行程序后，是否有代码可以在不重复检查配对设备的情况下保持两台设备之间的连接？我假设每当我按下按钮时，它都会搜索配对设备，当我松开按钮时，它会断开设备。如果这是因为我的代码，请告诉我

我愿意接受任何建议 多谢各位

public static enum CONN_TYPE {
    LEJOS_PACKET, LEGO_LCP
}
class UIMessageHandler extends Handler {
    @Override
    public void handleMessage(Message msg) {

        switch (msg.what) {
            case MESSAGE:
                _message.setText((String) msg.getData().get(MESSAGE_CONTENT));

                break;

            case TOAST:
                showToast((String) msg.getData().get(MESSAGE_CONTENT));
                break;
        }

        _message.setVisibility(View.VISIBLE);
        _message.requestLayout();

    }

}
public static final String MESSAGE_CONTENT = "String_message";
public static final int MESSAGE = 1000;
public static final int TOAST = 2000;
//private BTSend Right;
private Right right;
private Backward backward;
private TachoCount tachoCount;
private Stop stop;
private Toast reusableToast;
private Left left;

private TextView _message;

//static final String START_MESSAGE = "Please make sure you NXT is on and both it and your Android handset have bluetooth enabled";
private static final String GO_AHEAD = "Choose one!";

public static UIMessageHandler mUIMessageHandler;

private final static String TAG = "LeJOSDroid";

public static NXTConnector connect(final CONN_TYPE connection_type) {
    Log.d(TAG, " about to add LEJOS listener ");

    NXTConnector conn = new NXTConnector();
    conn.setDebug(true);
    conn.addLogListener(new NXTCommLogListener() {

        public void logEvent(String arg0) {
            Log.e(TAG + " NXJ log:", arg0);
        }

        public void logEvent(Throwable arg0) {
            Log.e(TAG + " NXJ log:", arg0.getMessage(), arg0);
        }
    });

    switch (connection_type) {
        case LEGO_LCP:
            conn.connectTo("btspp://NXT", NXTComm.LCP);
            break;
        case LEJOS_PACKET:
            conn.connectTo("btspp://");
            break;
    }

    return conn;

}

public static void displayToastOnUIThread(String message) {
    Message message_holder = formMessage(message);
    message_holder.what = LeJOSDroid.TOAST;
    mUIMessageHandler.sendMessage(message_holder);
}

private static Message formMessage(String message) {
    Bundle b = new Bundle();
    b.putString(LeJOSDroid.MESSAGE_CONTENT, message);
    Message message_holder = new Message();
    message_holder.setData(b);
    return message_holder;
}

public static void sendMessageToUIThread(String message) {
    Message message_holder = formMessage(message);
    message_holder.what = LeJOSDroid.MESSAGE;
    mUIMessageHandler.sendMessage(message_holder);
}

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    mUIMessageHandler = new UIMessageHandler();
    setContentView(R.layout.main);
    _message = (TextView) findViewById(R.id.messageText);
    seupNXJCache();
    setupTachoCount(this);
    setupRight(this);
    setupBackward(this);
    setupLeft(this);
    reusableToast = Toast.makeText(this, "", Toast.LENGTH_SHORT);
}

/*@Override
protected void onPause() {
    super.onPause();

    if (Right != null) {
        Log.d(TAG, "onPause() closing btSend ");
        Right.closeConnection();
        Right = null;
    }

    if (tachoCount != null) {
        Log.d(TAG, "onPause() closing btSend ");
        tachoCount.closeConnection();
    }
}*/

@Override
protected void onResume() {
    super.onResume();
}

private void setupRight(final LeJOSDroid mActivity) {       

    Button button = (Button) findViewById(R.id.button2);

    button.setOnTouchListener(new View.OnTouchListener() {//button.setOnClickListener(new View.OnClickListener() {
        public boolean onTouch(View arg0, MotionEvent motion) {
            Toast.makeText(LeJOSDroid.this, "Button Clicked 2", Toast.LENGTH_SHORT).show();
            do{
            try {
                right = new Right();
                right.start();
            } catch (Exception e) {
                Log.e(TAG, "failed to run BTSend:" + e.getMessage(), e);
            }

            } while (motion.getAction()==MotionEvent.ACTION_DOWN);

            return false;
        }

    });
}


private void setupBackward(final LeJOSDroid mActivity) {

    Button button = (Button) findViewById(R.id.button3);

    button.setOnTouchListener(new View.OnTouchListener() {
        public boolean onTouch(View arg0, MotionEvent motion) {
            Toast.makeText(LeJOSDroid.this, "Button Clicked 3", Toast.LENGTH_SHORT).show();

            do{
            try {
                backward = new Backward();
                //_message.setVisibility(View.INVISIBLE);
                backward.start();
            } catch (Exception e) {
                Log.e(TAG, "failed to run TachoCount:" + e.getMessage(), e);
            }
            } while (motion.getAction()==MotionEvent.ACTION_DOWN);
            return false;
        }
    } );
}

private void setupLeft(final LeJOSDroid mActivity) {

    Button button = (Button) findViewById(R.id.button4);

    button.setOnTouchListener(new View.OnTouchListener() {
        public boolean onTouch(View arg0, MotionEvent motion) {
            Toast.makeText(LeJOSDroid.this, "Button Clicked 4", Toast.LENGTH_SHORT).show();

            do{
            try {
                left = new Left();
                //_message.setVisibility(View.INVISIBLE);
                left.start();
            } catch (Exception e) {
                Log.e(TAG, "failed to run TachoCount:" + e.getMessage(), e);
            }
            } while (motion.getAction()==MotionEvent.ACTION_DOWN);
            return false;
        }
    } );
}

private void setupTachoCount(final LeJOSDroid mActivity) {
    Button button = (Button) findViewById(R.id.button1);

    button.setOnTouchListener(new View.OnTouchListener() {
        public boolean onTouch(View arg0, MotionEvent motion) {
            Toast.makeText(LeJOSDroid.this, "Button Clicked 1", Toast.LENGTH_SHORT).show();

            do {
            try {
                tachoCount = new TachoCount();
                _message.setVisibility(View.INVISIBLE);
                tachoCount.start();
            } catch (Exception e) {
                Log.e(TAG, "failed to run TachoCount:" + e.getMessage(), e);
            }
            }while (motion.getAction()==MotionEvent.ACTION_DOWN);
        return false;
        }

    });
}

private void seupNXJCache() {

    File root = Environment.getExternalStorageDirectory();

    try {
        String androidCacheFile = "nxj.cache";
        File mLeJOS_dir = new File(root + "/leJOS");
        if (!mLeJOS_dir.exists()) {
            mLeJOS_dir.mkdir();

        }
        File mCacheFile = new File(root + "/leJOS/", androidCacheFile);

        if (root.canWrite() && !mCacheFile.exists()) {
            FileWriter gpxwriter = new FileWriter(mCacheFile);
            BufferedWriter out = new BufferedWriter(gpxwriter);
            out.write("");
            out.flush();
            out.close();
            _message.setText("nxj.cache (record of connection addresses) written to: " + mCacheFile.getName() + GO_AHEAD);
        } else {
            _message.setText("nxj.cache file not written as"
                    + (!root.canWrite() ? mCacheFile.getName() + " can't be written to sdcard." : " cache already exists.") + GO_AHEAD);

        }
    } catch (IOException e) {
        Log.e(TAG, "Could not write nxj.cache " + e.getMessage(), e);
    }
    _message.setVisibility(View.VISIBLE);
    _message.requestLayout();
}

private void showToast(String textToShow) {
    reusableToast.setText(textToShow);
    reusableToast.show();
}

}