Question

我目前正在开发一款通过蓝牙与专有设备进行通信的应用。通过探索Bluetooth Chat Example，我可以完美地完成沟通。在此示例中，整个写入/读取过程如下： https://goo.gl/photos/3CoSNbhRtyDNoV1F6

现在我想从MyBluetoothClass内部创建一个写/读方法（用于校验和验证）。所以它会是这样的： //见上面的相同链接//

但是现在该方法除了写入和读取本身之外还执行所有操作，在方法完成后才会发生。有人可以给我一个关于如何进行的建议吗？以下是与新写作方法相关的方法。

    //Writing method called from the Activity
private String writeWithChksum(String msg) {
    write(msg);
    readCompleted.set(false);
    return processDeviceID();
}

//Get the device ID
private String processDeviceID() {
    Thread timeoutThread;
    int tries = 0;

    while(tries < 3) {
        tries++;
        System.out.println("Trying to get ID for the "+tries+" time.");

        waitingMessage.set(true);

        timeout.set(false);
        timeoutThread = new Thread() {
            @Override
            public void run() {
                try {
                    Thread.sleep(TIME_LIMIT);
                    timeout.set(true);
                } catch (InterruptedException e) {
                }
            }
        };
        timeoutThread.start();

        while(waitingMessage.get() && !timeout.get()) {
            sleepThread(150);
        }

        timeoutThread.interrupt();
    }

    readCompleted.set(true);
    return deviceID;
}

//Handler used to deal with BT methods
private final Handler auxHandler = new Handler() {

    @Override
    public void handleMessage(Message msg) {

        switch (msg.what) {
            case BluetoothSerial.MESSAGE_WRITE:
                byte[] writeBuf = (byte[]) msg.obj;
                // construct a string from the buffer
                String writeMessage = new String(writeBuf);

                //THIS SHOULD APPEAR IN EXECUTION TIME WHILE THE INITIAL METHOD IS STILL RUNNING, NOT AFTER
                Log.d(TAG,"BLUETOOTH_HANDLER -->" + "Wrote: "+writeMessage);
                break;
            case BluetoothSerial.MESSAGE_READ:
                byte[] readBuf = (byte[]) msg.obj;
                // construct a string from the valid bytes in the buffer
                String readMessage = new String(readBuf, 0, msg.arg1);

                //THIS AS WELL NEED TO APPEAR WHILE IN EXECUTION TIME
                Log.d(TAG,"BLUETOOTH_HANDLER -->" + "Read: "+readMessage);

                System.out.println("Gonna process the message");
                processMessage(readMessage);
                break;
        }
    }
};

//Standard writing method
public void write(String msg) {
    // Create temporary object
    ConnectedThread r;

    // Synchronize a copy of the ConnectedThread
    synchronized (this) {
        if (mState != STATE_CONNECTED) return;
        r = mConnectedThread;
    }

    // Perform the write unsynchronized
    msg = ">"+msg+"<\r\n";
    byte[] send = msg.getBytes();
    r.write(send);
    msgNumber++;

    sleepThread(400);
}

public void write(byte[] buffer) {
    try {
        mmOutStream.write(buffer);

        // Share the sent message back to the UI Activity
        mHandler.obtainMessage(MESSAGE_WRITE, -1, -1, buffer)
                .sendToTarget();
    } catch (IOException e) {
        Log.e(TAG, "Exception during write", e);
    }
}

Android蓝牙消息通信

0 个答案: