Question

请看图表:https://i.stack.imgur.com/G2lfN.png。

我对我的 app结构有一些麻烦。我有几次活动/情况,如果你接触到,就不允许你回去。页: 1

很方便的是START。活动。一旦我做了一些工作来决定我是否去了K或A,我就跑了START.finish(有K或A)。活动与紧靠背后台的临近时间为START。活动不再存在。

问题始于X状态。申请像你一样需要完全完成3个步骤,以便:

[START-> [A<->B<->C->[X>/strong>]->]

所需经费在紧靠背顿时:

www.un.org/Depts/DGACM/index_spanish.htm 接近

on B: show A

www.un.org/Depts/DGACM/index_french.htm

如果你最终完成某种izar干(A->B->C),你就可到X。

请求:我应如何完成(a) A, B, C, 防止背后纽顿出X? 我没有提及使用。

Answer 1

One way to achieve this, is in activity X, make pressing the back button fire of a custom event.

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

public void backPressed()
{
   Globals.finished = true;
   finish();
}

You ll notice the above method has the line Globals.finished = true; This refers to a class called Global with a static (static can be called on a class without having to instantiate an object) boolean variable called finished that is initially set to false as follows. In my own apps I often use a Globals class for sharing things common to the whole app. You can also used the shared preferences to do somthing similar.

public class Globals
{
  public static finished = false;
}

Then in the onResume (or possibly onStart) lifecycle method of all activities you can put the following

if (Globals.finished == true)
    finish();

这将导致所有活动立即结束,但只有在全球各地的完全变数出现之后。我以前就这样做了,而且工作得很好,并将确保这些活动把生命周期方法称作结束。

Even simpler than this, you could avoid the use of the back button event handler, by setting the Globals.finished = true, in the onClose method of ActivityX.

Answer 2

您需要打上<代码>finish()>,在你想要完成的活动中,一切照旧。利用Actative forResult,帮助你恢复完成学业

Answer 3

You can refer this LINK.

您可在A、B、C等活动的档案中添加和roid:无History=“true”,即......

sample code for manifeast look like

<activity android:label="string resource" android:name="activityA" android:noHistory="true" />

友情链接