How to use oncreate to obtain the height or width of controls in Android

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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.

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