RoundedImageView.java

package io.futurestud.tutorials.glide.ui.views;

import android.content.Context;
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.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 * This class provides the functionality to customize the regular squared imageview to a rounded one.
 * <p/>
 * Created by npeitek on 9/2/2014.
 */
public class RoundedImageView extends ImageView {

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

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

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

    public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
        Bitmap sbmp;
        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 );

        final int color = 0xffa19774;
        final Paint paint = new Paint();
        final Rect rect = new Rect( 0, 0, radius, radius );

        paint.setAntiAlias( true );
        paint.setFilterBitmap( true );
        paint.setDither( true );
        canvas.drawARGB( 0, 0, 0, 0 );
        paint.setColor( Color.parseColor( "#BAB399" ) );
        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 );

        return output;
    }

    @Override
    protected void onDraw(Canvas canvas) {

        Drawable drawable = getDrawable();

        if (drawable == null) {
            return;
        }

        if (getWidth() == 0 || getHeight() == 0) {
            return;
        }
        Bitmap b = ((BitmapDrawable) drawable).getBitmap();
        Bitmap bitmap = b.copy( Bitmap.Config.ARGB_8888, true );

        int w = getWidth(), h = getHeight();

        Bitmap roundBitmap = getCroppedBitmap( bitmap, w );
        canvas.drawBitmap( roundBitmap, 0, 0, null );
    }

}