AZ_ AZ_ - 1 month ago 16
Android Question

How to get the width and height of an android.widget.ImageView?

╔══════════════════════════════════════════════╗ ^
║ ImageView ╔══════════════╗ ║ |
║ ║ ║ ║ |
║ ║ Actual image ║ ║ |
║ ║ ║ ║ |60px height of ImageView
║ ║ ║ ║ |
║ ║ ║ ║ |
║ ╚══════════════╝ ║ |
╚══════════════════════════════════════════════╝
<------------------------------------------------>
90px width of ImageView


I have an image view with some default height and width, images are stored in db and I want to scale Image according to Imageview height width. As I don't want it give default values because when ever I change it's height and width I also have to change it in code.

I am trying to get the height and width of ImageView but 0 is returned to me in both cases.

int height = ((ImageView) v.findViewById(R.id.img_ItemView)).getHeight();


this returns me 0 even it has default height and width

Answer

My answer on this question might help you:

int finalHeight, finalWidth;
final ImageView iv = (ImageView)findViewById(R.id.scaled_image);
final TextView tv = (TextView)findViewById(R.id.size_label);
ViewTreeObserver vto = iv.getViewTreeObserver();
vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    public boolean onPreDraw() {
        iv.getViewTreeObserver().removeOnPreDrawListener(this);
        finalHeight = iv.getMeasuredHeight();
        finalWidth = iv.getMeasuredWidth();
        tv.setText("Height: " + finalHeight + " Width: " + finalWidth);
        return true;
    }
});

You can then add your image scaling work from within the onPreDraw() method.