BorderTransformation.java

package com.example.cosmic.androidappclasses;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;

/**
 * Created by ${cosmic} on 12/28/17.
 */


public class BorderTransformation {

    public static Bitmap applyCirclarBorder(Bitmap bmp, int color) {
        Bitmap sbmp;
        int radius = bmp.getWidth();
        if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
            float smallest = Math.min(bmp.getWidth(), bmp.getHeight());
            float factor = smallest / radius;
            sbmp = Bitmap.createScaledBitmap(bmp, (int)(bmp.getWidth() / factor), (int)(bmp.getHeight() / factor), false);
        } else {
            sbmp = bmp;
        }

        Bitmap output = Bitmap.createBitmap(radius, radius,
                Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);

        //color = 0xffa19774;
        final Paint paint = new Paint();
        final Paint stroke = new Paint();

        final Rect rect = new Rect(0, 0, radius, radius);

        paint.setAntiAlias(true);
        stroke.setAntiAlias(true);

        paint.setFilterBitmap(true);
        stroke.setFilterBitmap(true);

        paint.setDither(true);
        stroke.setDither(true);

        canvas.drawARGB(0, 0, 0, 0);
        paint.setColor(Color.RED);
        stroke.setColor(color); //border color
        stroke.setStyle(Paint.Style.STROKE);
        stroke.setStrokeWidth(14f); //border width
        canvas.drawCircle(radius / 2 + 0.7f,
                radius / 2 + 0.7f, radius / 2 + 0.1f, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(sbmp, rect, rect, paint);

        canvas.drawCircle(radius / 2 + 0.7f,
                radius / 2 + 0.7f, radius / 2 - stroke.getStrokeWidth()/2 +0.1f, stroke);

        return output;
    }

    public Bitmap applyRoundCornerEffect(Bitmap src, float round) {
        // image size
        int width = src.getWidth();
        int height = src.getHeight();

        Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

        Canvas canvas = new Canvas(result);
        canvas.drawARGB(0, 0, 0, 0);

        final Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setColor(Color.WHITE);

        final Rect rect = new Rect(0, 0, width, height);
        final RectF rectF = new RectF(rect);
        canvas.drawRoundRect(rectF, round, round, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(src, rect, rect, paint);

        // return final image
        return result;
    }
}