Purpose of "match_parent" in android:layout_width/height for top view in Android -

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a noobish question.

i curious purpose of having "match_parent" in 2 xml attributes top level layout view linearlayout. believe "match_parent" indicates view wants big parent. in case of top level layout view (linearlayout) there no parent..?

the view u see on screen attached towindow upper layout property "match_parent" window.

see window class

and window manager


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