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好玩的Handler，好玩Handler
privateProgressBar mProgressBar;privateint i =0;privateHandler mHandler =newHandler(){ // 创建Handle@Overridepublicvoid handleMessage(Message msg){super.handleMessage(msg);Log.i("-mHandler->",i+"");mProgressBar.setProgress(i);}};privateRunnable runnable =newRunnable(){@Overridepublicvoid run(){Log.i("-Runnable->",i+"");i +=10;// 要做的事情，这里再次调用此Runnable对象，以实现每两秒实现一次的定时器操作mHandler.postDelayed(runnable,2000); // 定时器mHandler.sendMessageDelayed(Message.obtain(),0);// 发送消息才会触发重写的handleMessage方法}};@Overrideprotectedvoid onCreate(@NullableBundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_handler);mProgressBar =(ProgressBar) findViewById(R.id.pb_handler);mHandler.post(runnable);// 开始执行线程// runnable.run(); // 也可以用这个来开始线程}/*** 删除的时候停止线程操作*/@Overrideprotectedvoid onDestroy(){super.onDestroy();mHandler.removeCallbacks(runnable);}}
// 两种获取Message的方法// Returns a new Message from the global message pool.