//方法1
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();

---------------------------------------

//方法2
ViewTreeObserver vto = imageView.getViewTreeObserver();
vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    public boolean onPreDraw() {
        vto.removeOnPreDrawListener(this);
        int height = imageView.getMeasuredHeight();
        int width = imageView.getMeasuredWidth();
 
        return true;
}
});

//方法3
ViewTreeObserver vto = imageView.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
    @Override
public void onGlobalLayout() {
        imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this
 
);
imageView.getHeight();
imageView.getWidth();
}
});