android - Why isn't there a getContentView() method for Activity?

Question

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?

Answer 1

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

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

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);

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 + " ");
    }
}

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

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