Toast和Handler的间隔使用实例

       public class MyToast {
          private Context mContext = null;
          private Toast mToast = null;
          private Handler mHandler = null;
          private Runnable mToastThread  = new Runnable() {
            @Override
            public void run() {
              mToast.show();
              mHandler.postDelayed(mToastThread, 3000);//每隔3秒显示一次，经测试，这个时间间隔效果是最好
            }
         };
         public MyToast(Context context){
           mContext = context;
           mHandler = new Handler(mContext.getMainLooper());
           mToast = Toast.makeText(mContext, "自由@飞翔", Toast.LENGTH_LONG);
         }
         public void setText(String text){
           mToast.setText(text);
         }
        public void show(){
          mHandler.post(mToastThread);
        }
       public void cancel() {
        mHandler.removeCallbacks(mToastThread);//先把显示线程删除
        mToast.cancel();// 把最后一个线程的显示效果cancel掉，就一了百了了
       }
    }

  public class MainActivity extends Activity implements OnClickListener{
     private Button show_button;
    private Button cancel_button;
    private MyToast myToast;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        show_button = (Button) findViewById(R.id.show_button);
        cancel_button = (Button) findViewById(R.id.cancel_button);
        show_button.setOnClickListener(this);
        cancel_button.setOnClickListener(this);
        myToast = new MyToast(this);
    }
   @Override
   public void onClick(View v) {
    if(v == show_button){
      myToast.show();
    }else if (v == cancel_button) {
     myToast.cancel();
   }
}
}