Is it possible to change the RatingBar direction?

Question

Does anyone knows if its possible to make the RatingBar go from right-to-Left instead of left to right, or have an idea how to do it?

Answer 1

Use attribute android:scaleX="-1"

OR

package com.example.selection;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.RatingBar;

public class InvertRatingBar extends RatingBar {

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

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

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

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        int width = this.getMeasuredWidth();
        event.setLocation(width - event.getX(), event.getY());
        return super.onTouchEvent(event);
    }

    @Override
    protected synchronized void onDraw(Canvas canvas) {
        int width = this.getMeasuredWidth();
        Matrix matrix = canvas.getMatrix();
        matrix.preTranslate(width, 0);  
        matrix.preScale(-1.f, 1);
        canvas.setMatrix(matrix);
        super.onDraw(canvas);
    }
}