ImageView.getWidth() returns 0

Question

I get imageView\'s width 0. Below is code.

xml file :

Answer 1

well i found many many questions related that are duplicate to this question, and most of the answers were not fit for my case.

I have come up with a solution that may fit for yours as it does for me. Simply, i have created a custom ImageView and added a new callback OnSizeChangedCallback that is being called whenever the size of the view is changed to non zero values.

Here's a code sample of my own:

public class AvatarImageView extends ImageView{

    private OnImageViewSizeChanged sizeCallback = null;

    public AvatarImageView(Context context) {
        super(context);
    }

    public AvatarImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public AvatarImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        if (w == 0 || h == 0) {
            return;
        }
        else{
            if(sizeCallback != null)
                sizeCallback.invoke(this, w, h);
        }

    }

    public void setOnImageViewSizeChanged(OnImageViewSizeChanged _callback){
        this.sizeCallback = _callback;

        if (getWidth() != 0 && getHeight() != 0) {
            _callback.invoke(this, getWidth(), getHeight());
        }
    }

    public interface OnImageViewSizeChanged{
        public void invoke(ImageView v, int w, int h);
    }
}

and you can simply use it as follows:

final AvatarImageView avatarIcon = (AvatarImageView) findViewById(R.id.avatarImg);
avatarIcon.setOnImageViewSizeChanged(new AvatarImageView.OnImageViewSizeChanged() {
    @Override
    public void invoke(ImageView v, final int w, final int h) {
            // Do whatever you want with w and h which are non zero values ...
    }
});

related questions:

1. views-getwidth-and-getheight-returning-0
2. android-imageview-return-getwidth-getheight-zero
3. android-get-width-returns-0