如何在finish（）方法中获取上下文？

Question

I'm just rtying to display an offerwall when someone is leaving the application, so I have placed the finish() method:

@Override
public void finish() {
    super.finish();
    MobileCore.init(this.getContext(), "xxx", MobileCore.LOG_TYPE.DEBUG, MobileCore.AD_UNITS.OFFERWALL);

    MobileCore.setStickeezReadyListener(new OnReadyListener() {
        @Override
        public void onReady(MobileCore.AD_UNITS adUnit) {
            if (adUnit == MobileCore.AD_UNITS.OFERWALL) {
                MobileCore.showOferWall(getActivity());
            }
        }
    });
}

But I have problems. First of all with this code this.getContext() and also with this getActivity()

I know that I can not access the activity this way, but I'm extremely confused at the moment. I know that I'm missing a very small part here. Can you give me a push?

Answer 1

Activity class extends Context所以实际上Activity是Context实例，在onFinish ，系统试图销毁Activity因此必须没有与此Activity相关的Activity ，如果仍然需要Context ，则可以使用this.getApplicationContext 。

Answer 2

要在嵌套类（在您的情况下是匿名类）中调用外部类，请使用外部类的类名：

YourOuterClass.this

Answer 3

Your activity's context will remain valid until you call super.finish() . So don't call it until you're done.

If you can't do that, use the application context.