Android 在Oncreate中获取控件的高度

@Override
public void onCreate(BundlesavedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
finalImageView imageView = (ImageView) findViewById(R.id.imageview);
int w=View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
int h=View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
imageView.measure(w, h);
intheight =imageView.getMeasuredHeight();
intwidth =imageView.getMeasuredWidth();
textView.append("\n"+height+","+width);
System.out.println("执行完毕.."+System.currentTimeMillis());
}
//------------------------------------------------方法一
int w =View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
int h =View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
imageView.measure(w, h);
int height=imageView.getMeasuredHeight();
int width=imageView.getMeasuredWidth();
textView.append("\n"+height+","+width);
//-----------------------------------------------方法二
ViewTreeObserver vto =imageView.getViewTreeObserver();
vto.addOnPreDrawListener(newViewTreeObserver.OnPreDrawListener() {
public booleanonPreDraw() {
int height =imageView.getMeasuredHeight();
int width =imageView.getMeasuredWidth();
textView.append("\n"+height+","+width);
return true;
}
});
//-----------------------------------------------方法三
ViewTreeObserver vto2 = imageView.getViewTreeObserver();
vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener(){
@Override
public voidonGlobalLayout() {
imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
textView.append("\n\n"+imageView.getHeight()+","+imageView.getWidth());
}
});