Android 定时做任务

    Handler handler = new Handler();

    Runnable runnable=new Runnable() {

        @Override
        public void run() {

            //每两秒执行一次runnable.

            handler.postDelayed(runnable, 2000);

            // 要做的事情
            
            。。。。。。。。

        }};



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    
        //每两秒执行一次runnable.
        handler.postDelayed(runnable, 2000);
        
    }