imageview with ratio that can be set based on width

RatioImageView.java

import android.content.Context;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 * Created by Eoin Fogarty on 2015/11/06.
 *
 * Clamps an image ratio
 * between 3(width) and 2(height) and 1(width) and 2(height)
 */
public class RatioImageView extends ImageView {

    public static final float LIST_IMAGE_MAX_HEIGHT_RATIO = 2f / 1f;
    public static final float LIST_IMAGE_MIN_HEIGHT_RATIO = 2f / 3f;

    // by default the image ratio will be 1 to 1 ie square
    private static final int DEFAULT_RATIO = 1;

    private float mRatio = DEFAULT_RATIO;

    public RatioImageView(@NonNull Context context) {
        super(context);
    }

    public RatioImageView(@NonNull Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public RatioImageView(@NonNull Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(getMeasuredWidth(), (int) (getMeasuredWidth() * mRatio));
    }

    public void setRatio(float ratio) {
        //clamp ratio between 3/2 and 1/2
        mRatio = Math.max(LIST_IMAGE_MIN_HEIGHT_RATIO, ratio);
        mRatio = Math.min(LIST_IMAGE_MAX_HEIGHT_RATIO, mRatio);
        requestLayout();
    }
}