AspectRatioFrameLayout for Android

AspectRatioFrameLayout.java

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.widget.FrameLayout;

/**
 * Created by tuanchauict on 11/18/15.
 */
public class AspectRatioFrameLayout extends FrameLayout {
    private static final float DEFAULT_RATIO = 109.33f / 144f;
    private float mViewAspectRatio; // width / height
    private boolean mBaseWidth = true;

    public AspectRatioFrameLayout(Context context) {
        this(context, null);
    }

    public AspectRatioFrameLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public AspectRatioFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RatioView);
        mViewAspectRatio = a.getFloat(R.styleable.RatioView_ratio, DEFAULT_RATIO);
        mBaseWidth = a.getBoolean(R.styleable.RatioView_baseWidth, true);
        a.recycle();
    }


    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width, height;

        if (mBaseWidth) {
            width = MeasureSpec.getSize(widthMeasureSpec);
            int widthWithoutPadding = width - getPaddingLeft() - getPaddingRight();
            int maxHeight = (int) (widthWithoutPadding / mViewAspectRatio);
            height = maxHeight + getPaddingTop() + getPaddingBottom();
        } else {
            height = MeasureSpec.getSize(heightMeasureSpec);
            int heightWithoutPadding = height - getPaddingTop() - getPaddingBottom();
            int maxWidth = (int) (heightWithoutPadding * mViewAspectRatio);
            width = maxWidth + getPaddingLeft() + getPaddingRight();
        }
        super.onMeasure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
    }
}

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="RatioView">
        <attr name="ratio" format="float"/>
        <attr name="baseWidth" format="boolean"/>
    </declare-styleable>
</resources>