android插入活动堆栈 [英] android insert into activity stack

问题描述

这是一个问题:假设活动堆栈由 A->B->C 组成.

Here is the question: Let's say the activity stack consist of A->B->C.

如果用户按照顺序例如:开始A -> B -> C，按下返回按钮将导致C->B->A.但是，如果用户直接进入活动 C(例如:通过通知)，按下后退按钮将导致应用关闭，而不是进入 B->A.

If user followed the order eg: Start A -> B -> C, pressing back button will cause C->B->A. However, if user entered directly into activity C (eg: via notification), pressing back button will cause the app to close, instead of going into B->A.

如何将 Activity 堆栈插入到 A->B->C 中，这样当用户按下 C 时，它总是会回到 B.

How do I insert the into the activity stack to become A->B->C, so that when user pressed back at C, it will always back to B.

谢谢

推荐答案

只需覆盖activityc中的onBackPressed()方法和startactivity B和activity b中的startactivity a即可.

just overide the onBackPressed() method and startactivity B in activityc and startactivity a in activity b.

在 activty c 中有这些代码::

in activty c have these code::

public void onBackPressed(){
startActivity(new Intent(this,ActivityB.class));
finish();
}

在活动 b 中有这些代码::

and in activity b have these code::

public void onBackPressed(){
startActivity(new Intent(this,ActivityA.class));
finish();
}

在活动 a 中有这些代码::

and in activity a have these code::

public void onBackPressed(){
finish();
}

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