Android中点击物理返回按键（再按一次退出程序）
2017-12-08 16:13:30

private long exitTime = 0;@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) { if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN){ if((System.currentTimeMillis()-exitTime) > 2000){ Toast.makeText(getApplicationContext(), "再按 ......

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