android实现双击back键退出
16lz
2021-01-23
private int mBackKeyPressedTimes = 0;@Overridepublic void onBackPressed() {if (mBackKeyPressedTimes == 0) {Toast.makeText(this, "再次按返回键退出", Toast.LENGTH_SHORT).show();mBackKeyPressedTimes = 1;new Thread() {@Overridepublic void run() {try {Thread.sleep(2000);} catch (InterruptedException e) {e.printStackTrace();} finally {mBackKeyPressedTimes = 0;}}}.start();return;}super.onBackPressed();}
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