CircleImageView

Glide-CircleImageView

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.Shader;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

public class CircleImageView extends ImageView {

	private Paint mPaint = null;
	
	public CircleImageView(Context context) {
		super(context);
		init();
	}

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

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

	@Override
	public void setImageBitmap(Bitmap bitmap) {
		CircleImageDrawable circle = new CircleImageDrawable(bitmap);
		this.setImageDrawable(circle);
	}
	
	private void init() {
		mPaint = new Paint();
		mPaint.setAntiAlias(true);
	}

	private class CircleImageDrawable extends Drawable{

		private final BitmapShader mBitmapShader;
		private int circleRadius;

		/**
		 * Instantiates a new circle image drawable.
		 *
		 * @param bitmap the bitmap
		 */
		public CircleImageDrawable(Bitmap bitmap) {
			mBitmapShader = new BitmapShader(bitmap,
					Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
			mPaint.setShader(mBitmapShader);
		}

		/* (non-Javadoc)
		 * @see android.graphics.drawable.Drawable#onBoundsChange(android.graphics.Rect)
		 */
		@Override
		protected void onBoundsChange(Rect bounds) {
			super.onBoundsChange(bounds);
			int width,height;
			width = bounds.width();
			height = bounds.height();
			if(width>0&&height>0){
				if(width<height){
					circleRadius = width/2;
				}else{
					circleRadius = height/2;
				}
			}
		}

		/* (non-Javadoc)
		 * @see android.graphics.drawable.Drawable#draw(android.graphics.Canvas)
		 */
		@Override
		public void draw(Canvas canvas) {
			if(circleRadius>0){
				canvas.drawCircle(getBounds().exactCenterX(), getBounds().exactCenterY(), circleRadius, mPaint);
			}
		}

		/* (non-Javadoc)
		 * @see android.graphics.drawable.Drawable#getOpacity()
		 */
		@Override
		public int getOpacity() {
			return PixelFormat.TRANSLUCENT;
		}

		/* (non-Javadoc)
		 * @see android.graphics.drawable.Drawable#setAlpha(int)
		 */
		@Override
		public void setAlpha(int alpha) {
			mPaint.setAlpha(alpha);
		}

		/* (non-Javadoc)
		 * @see android.graphics.drawable.Drawable#setColorFilter(android.graphics.ColorFilter)
		 */
		@Override
		public void setColorFilter(ColorFilter cf) {
			mPaint.setColorFilter(cf);
		}
	}
	
}