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This article focuses on "how to use oncreate to obtain the height or width of a control in Android". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use oncreate to obtain the height or width of a control in Android.

The realization method of obtaining the height or width of Control in oncreate in Android

The onCreate function simply provides an opportunity to initialize the data, and the graph has not been formally drawn at this time. GetWidth () or getHeight () gets a value of 0 if the drawing has not yet been rendered. If you need an adaptive screen, you need to get the parent control size as soon as you enter the interface, and then you need to set the child control size dynamically in onCreate.

Method 1:

Use the addOnPreDrawListener interface of the ViewTreeObserver class.

ViewTreeObserver vto = hscrollview.getViewTreeObserver (); vto.addOnPreDrawListener (newViewTreeObserver.OnPreDrawListener () {@ Override publicboolean onPreDraw () {if (hasMeasured = = false) {intwid = hscrollview.getWidth (); inthei = hscrollview.getHeight () If (wid! = 0 & & hei! = 0) {hasMeasured= true;}} returntrue;}})

Method 2:

Use the addOnGlobalLayoutListener interface of the ViewTreeObserver class.

At this point, I believe you have a deeper understanding of "how to use oncreate to obtain the height or width of the control in Android". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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