Question: In my code I have an `Image View` in my XML layout and I keep changing the source image for this in my code. Now I want to know the width and height of the generated image each time.

I tried using `getWidth()`, `getHeight(),` `getMeasuredWidth(),` and `getMeasuredHeight()`, but they all return 0.

How can I get this?

Answer: 
Where you calling `getWidth()` and `getHeight()` on ImageView? If you calling from `onCreate()` in activity, it won't work. You need to wait for activity window to attached and then call `getWidth() and getHeight()` on ImageView. You can try calling `getWidth() and getHeight()` from `onWindowFocusChanged()` method of your activity.

```
@Override
public void onWindowFocusChanged(boolean hasFocus){
    int width=imageView.getWidth();
    int height=imageView.getHeight();
}

```
if you set ImageView a drawable, and the ImageView's height and width type is WRAP\_CONTENT, you can get the ImageView's height and width by this even you calling from `onCreate()`

```
int height = imageView.getDrawable().getIntrinsicHeight();
int width = imageView.getDrawable().getIntrinsicWidth();

```