-
@Override
-
public boolean onKeyDown(int keyCode, KeyEvent event)
-
{
-
if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN)
-
{
-
-
if((System.currentTimeMillis()-exitTime) > 2000)
-
{
-
Toast.makeText(getApplicationContext(), "再按一次退出程序",Toast.LENGTH_SHORT).show();
-
exitTime = System.currentTimeMillis();
-
}
-
else
-
{
-
finish();
-
System.exit(0);
-
}
-
-
return true;
-
}
-
return super.onKeyDown(keyCode, event);
-
}
Android实现两次按下返回键退出
原文：http://www.cnblogs.com/yxwkf/p/5401130.html
