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

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梦如初夏
梦如初夏 2020-12-01 10:04

The Activity class has a setContentView() method. The PopupWindow Class has a getContentView() method but nothing else d

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  •  醉梦人生
    2020-12-01 10:43

    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(), "");
    

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