代碼過程中中,將代碼過程中比較常用的代碼段做個珍藏,下面的代碼內容是關於Android控制雙擊返回按鈕退出程序的代碼,應該是對大家有些幫助。
private static long back_pressed;
@Override
public void onBackPressed()
{
if (back_pressed + 2000 > System.currentTimeMillis()) super.onBackPressed();
else Toast.makeText(getBaseContext(), "Press once again to exit!", Toast.LENGTH_SHORT).show();
back_pressed = System.currentTimeMillis();
}