第 8 章 Schedule 计划任务

		
	new Handler().postDelayed(() -> {
        picture.browsePictureFolder();
    }, 30000);		
		
		

		
    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            MainActivity.this.finish();
        }
    }, 1800);		
		
		

Android 11

		
	new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
        public void run() {
            progressBar.setVisibility(View.INVISIBLE);
        }
    }, 3000);