从另外一个杀一个活动 [英] Killing one activity from another

问题描述

我有两个活动A和B B是透明穿过活动，并且A看见。我要杀了由$ P $ B pssing一个按钮。

I have two activities A and B. B is a transparent pass through activity, and A is seen. I want to kill B by pressing a button A.

下面是我到目前为止已经试过：

Here's what I've tried so far:

B obj=new B();
obj.finish();

我创建B的一个对象，并试图杀死它。没有工作。

I created an object of B and tried to kill it. That didn't work.

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                intent.putExtra("keep", true);
                startActivity(intent);

什么是应该这样code做的是明确的最上面的活动，这是B和再次调用B，但这次我传递一个值，使得B中的几秒钟后，会杀死自己。

What this code is supposed to do is clear the top most activity, which is B and call B again, except this time I'm passing a value such that B kills itself after a few seconds.

此只堆积由于某种原因，活动的多个实例。或者至少我认为这是因为屏幕变得像素化，由于许多透明的活动所发生的事情。

This only piled up more instances of the activity for some reason. Or at least I think that's what happened because the screen became pixelated due to many transparent activities.

下面是我的清单：

<activity
        android:name="com.xxx.xxx.B"
        android:excludeFromRecents="true"
        android:theme="@android:style/Theme.Translucent.NoTitleBar"
        android:clearTaskOnLaunch="true" >
    </activity>

我有什么做的，这样，当我按下按钮后会显示活动和第二次杀死呢？创作的部分显然是照顾。我b活动弹出，我想现在杀它的B是在顶部。

What do I have to do so that, when I hit a button once the activity is displayed and the second time kills it? The creation part is obviously taken care of. My activity B pops up, I want to kill it now that B is on top.

修改

我想这有一个复选框，这里的code：

I tried this with a checkBox, here's the code:

enable.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            finishActivity(0);
            Intent intent = new Intent(A.this, B.class);
            if (enable.isChecked()) {
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                intent.putExtra("keep", true);
                intent.putExtra("value", 10);
                startActivityForResult(intent, 0);
            }
            else
            {
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                intent.putExtra("keep", false);
                startActivityForResult(intent, 0);
            }
        }
    });

在使被检查活动被调用时，工作正常。但他们继续打桩。它不喜欢这个A-> B-> A-> B当我检查，并取消选中该复选框。这是A-> B-> BB-> BBB

When enable is checked the activity is called, which works fine. But they keep piling on. It's not like this A->B->A->B when I check and uncheck the checkBox. It's A->B->BB->BBB

推荐答案

您可以尝试通过调用该活动的静态方法直接杀死一个活动：

You could try to directly kill an activity by calling a static method in that activity:

活动A应具有可变

 static ActivityA activityA;

在的onCreate状态：

In onCreate state:

 activityA = this;

和添加这个方法：

public static ActivityA getInstance(){
   return   activityA;
 }

在活动B，调用函数的恒等式的getInstance（）

In activity B, call the fuction getInstance()

ActivityA.getInstance().finish();     

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