Android获取View的宽高

有时我们需要在Activity中获取某个View的宽高，但是在onCreate()，onStart(),onResume()中使用view.getHeight()和view.getWidth()方法获取View的宽高，获取到的值竟然都是0，是不是很无语，

这里给出几种获取View宽高的方法

  

   //第一种

<span style="white-space:pre"></span>@Overridepublic void onWindowFocusChanged(boolean hasFocus) {super.onWindowFocusChanged(hasFocus);if (hasFocus) {int height = view.getHeight();int width = view.getWidth();Log.e("onWindowFocusChanged-------", " width=" + width + " height="+ height);}}

   //第二种，会执行很多次

private void getViewSize(final View view) {<span style="white-space:pre"></span>ViewTreeObserver vto = view.getViewTreeObserver();vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {@Overridepublic boolean onPreDraw() {     int height = view.getMeasuredHeight();     int width = view.getMeasuredWidth();     Log.e("OnPreDraw-------", " width=" + width + " height="+ height);     return true;}    });}

   //第三种

 

private void getViewSize2(final View view) {ViewTreeObserver viewTreeObserver = view.getViewTreeObserver();viewTreeObserver.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {@Overridepublic void onGlobalLayout() {view.getViewTreeObserver().removeGlobalOnLayoutListener(this);int width = view.getWidth();int height = view.getHeight();Log.e("onGlobalLayout-------", " width=" + width+ " height=" + height);}});}

   //第四种

   

private void getViewSize3(final View view) {<span style="white-space:pre"></span>view.post(new Runnable() {<span style="white-space:pre"></span>@Overridepublic void run() {int width = view.getWidth();int height = view.getHeight();Log.e("postRunnable-------", " width=" + width + " height="+ height);}});}