android aspect ration imageview

AspectRatioImageView2.java

public class AspectRatioImageView2 extends ImageView {

    public AspectRatioImageView2(Context context)
    {
        super(context);
    }

    public AspectRatioImageView2(Context context, AttributeSet attrs)
    {
        super(context, attrs);
    }

    public AspectRatioImageView2(Context context, AttributeSet attrs,
                                int defStyle)
    {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        Drawable drawable = getDrawable();
        if (drawable != null)
        {
            int width =  MeasureSpec.getSize(widthMeasureSpec);
            int diw = drawable.getIntrinsicWidth();
            if (diw > 0)
            {
                int height = width * drawable.getIntrinsicHeight() / diw;
                setMeasuredDimension(width, height);
            }
            else
                super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
        else
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}