如果数据在特定时间段内未到达，如何退出循环？

Question

我正在尝试从主线程中的缓冲区（蓝牙InputStream）读取数据。我还创建了一个计时器处理程序。如果数据到达，则立即将其返回；如果数据在30秒内未到达，则退出循环。

public boolean isTimerFired = false;
//isTimerFired is declared globally and initialised first false;

public String readDataBuffer(){

    final int intervalTime = 30000; // 30 sec

    //Timer Handler to count till 30 sec
    Handler timerHandler = new Handler();
    timerHandler.postDelayed(new Runnable() {
        @Override
        public void run() {                
            isTimerFired=true; // After timer is triggered it is made false.                
        }
    }, intervalTime);

    // Main Thread to read InputStream
            while(!isTimerFired)
            {
                inputStream = null;
                try {
                        inputStream = socket.getInputStream();
                        if (inputStream.available() > 0)
                        { 
                            byte[] buffer = new byte[1024];
                            inputStream.read(buffer);
                            tempMsg = new String(buffer, 0, 1);
                            Log.d("==>msg", "tempMsg=" + tempMsg);
                            break;
                        }
                }
                catch (Exception e)
                { }
            }
            isTimerFired=false;      

    return tempMsg;
}