qq_42983207的博客

private void initButton(Button bt){ Animation animation=new AlphaAnimation(1.0f,0.0f); animation.setDuration(300); bt.startAnimation(animation); } 实现按钮的点击感

先要监听到U盘插入的广播并获取U盘的文件路径，一般使用动态注册。 UsbStateReceiver receiver = new UsbStateReceiver(); //new一个广播接收器 IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_MEDIA_UNMOUNTED); //注册 U盘拔出广播 fi