为什么没有一个getContentView（）方法的活动？ [英] Why isn't there a getContentView() method for Activity?

问题描述

在活动类有一个的setContentView（）方法。该 PopupWindow 类有一个 getContentView（）方法，但没有人这样做。是否有另一种方式来获得一个活动的主要内容有何看法？

The Activity class has a setContentView() method. The PopupWindow Class has a getContentView() method but nothing else does. Is there another way to get the main content view for an activity?

推荐答案

我能得到一个活动的这个电话的内容：

I was able to get to the contents of an Activity with this call:

ViewGroup view = (ViewGroup)getWindow().getDecorView();

您也许应该检查getDecorView返回一个instanceof的ViewGroup适用于所有情况，但与LinearLayout中活动中的code以上运行良好。要到达的LinearLayout然后你可以只是：

You should probably check that getDecorView returns an instanceof ViewGroup for all cases, but with a LinearLayout in the Activity the code above runs fine. To get to the LinearLayout you could then just:

LinearLayout content = (LinearLayout)view.getChildAt(0);

如果你有一个函数是这样的：

And if you have a function like this:

void logContentView(View parent, String indent) {
    Log.i("test", indent + parent.getClass().getName());
    if (parent instanceof ViewGroup) {
        ViewGroup group = (ViewGroup)parent;
        for (int i = 0; i < group.getChildCount(); i++)
            logContentView(group.getChildAt(i), indent + " ");
    }
}

您可以遍历所有的意见，并与您的活动里面以下通话记录自己的类名：

You could iterate through all views and log their class names with the following call inside your Activity:

logContentView(getWindow().getDecorView(), "");

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