Andorid歌词秀技术要点（1）SafetyTimer(3)

    public void startTimer(){ 
        mHandler = new Handler(){   
             public void handleMessage(Message msg) {   
                 if(mListener != null){ 
                     mListener.OnTimer(); 
                     Log.i(TAG, "mListener.OnTimer()"); 
                 } 
                 super.handleMessage(msg); 
             } 
        };   
        mTask = new TimerTask(){   
            public void run() {   
                 Message message = new Message();       
                 message.what = 0;          //anything is ok. 
                 mHandler.sendMessage(message);  
             }   
        };   
        mTimer = new Timer(); 
        mTimer.schedule(mTask, 0, mInterval); 
    } 
     
    //停止Timer动作 
    //释放获得的资源。 
    public void stopTimer(){ 
        mTimer.cancel(); 
        mTimer.purge(); 
        mTimer = null; 
        mHandler = null; 
        mTask = null; 
        Log.i(TAG, "stopTimer()"); 
    } 
     
    //Timer是否处于工作状态。 
    public boolean isRunging(){