android应用退出提示


private boolean IsExit;

//连点返回键退出

 @Override

    public boolean onKeyDown(int keyCode, KeyEvent
event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (mIsExit) {
this.finish(); }
else { Toast.makeText(this,
"再按一次退出", Toast.LENGTH_SHORT).show(); mIsExit
= true;
new Handler().postDelayed(new Runnable() { @Override
public
void run() { mIsExit =
false; } }, 2000); }
return
true; } return super.onKeyDown(keyCode,
event); }