如何清除活动的Andr​​oid软件开发包？ [英] How to clear the Android Stack of activities?

问题描述

我有几个活动的Andr​​oid应用程序，我希望用户能够登录，由pressing菜单按钮。我的问题是，

I have an application with several Activities in Android and I want the user to be able to log-out by pressing a menu button. The problem I have is that

A）的Andr​​oid不会让你终止应用程序和
B），甚至当我向用户发送到 LoginActivity 他们又总能preSS的回的和马上回了previous活动他们是在

A) Android doesn't let you terminate the application and
B) even when I send the user to the LoginActivity again they can always press back and get right back to the previous activity they were in.

我已经尝试启动活动有以下两个标志：

I already tried to launch the Activity with the two following flags:

Intent intent  = new Intent(this, LoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);        
startActivity(intent);

我也试过跟他们每个人自己。

I also tried with each one of them by themselves.

我也打过电话完成（）在 startActivity（意向）因为我读的另一计算器 的问题。

I also tried calling finish() after startActivity(intent) as I read in another StackOverflow question.

推荐答案

在您登录活动，覆盖后退按钮，所以它隐藏在完成活动的您的应用程序，而不是：

In your login activity, override the back button, so it hides your app instead of finishing the activity:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        moveTaskToBack(true);
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

此外，一定要设置的android：alwaysRetainTaskState =根活动真，因此Android不会从用户30分钟不活动后清除栈（包括登录活动）

Also be sure to set android:alwaysRetainTaskState="true" on the root activity, so Android doesn't clear your stack (including the login activity) after 30min of inactivity from user.

然后，只需调用finish（）时，有一个成功登录。

Then just call finish() when there is a successful login.

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