package com.example.widget;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

public class MyRoundPic extends View {
	private Bitmap bitmap;

	public MyRoundPic(Context context, Bitmap bitmap) {
		super(context);
		this.bitmap = bitmap;

	}

	public MyRoundPic(Context context, AttributeSet attrs) {
		super(context, attrs);

	}

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

	}

	@Override
	protected void onDraw(Canvas canvas) {

		super.onDraw(canvas);

		Paint p = new Paint();
		p.setColor(Color.GREEN);
		 
	// 	canvas.drawCircle(100, 100, 360,null);
		canvas.drawBitmap(toRoundBitmap(bitmap), 0, 0, null);
	 
 
	}

	 /**
     * 转换图片成圆形
     * @param bitmap 传入Bitmap对象
     * @return
     */
    public Bitmap toRoundBitmap(Bitmap bitmap) {
            int width = bitmap.getWidth();
            int height = bitmap.getHeight();
            float roundPx;
            float left,top,right,bottom,dst_left,dst_top,dst_right,dst_bottom;
            if (width <= height) {
                    roundPx = width / 2;
                    top = 0;
                    bottom = width;
                    left = 0;
                    right = width;
                    height = width;
                    dst_left = 0;
                    dst_top = 0;
                    dst_right = width;
                    dst_bottom = width;
            } else {
                    roundPx = height / 2;
                    float clip = (width - height) / 2;
                    left = clip;
                    right = width - clip;
                    top = 0;
                    bottom = height;
                    width = height;
                    dst_left = 0;
                    dst_top = 0;
                    dst_right = height;
                    dst_bottom = height;
            }
             
            Bitmap output = Bitmap.createBitmap(width,
                            height, Config.ARGB_8888);
            Canvas canvas = new Canvas(output);
             
            final int color = 0xff424242;
            final Paint paint = new Paint();
            final Rect src = new Rect((int)left, (int)top, (int)right, (int)bottom);
            final Rect dst = new Rect((int)dst_left, (int)dst_top, (int)dst_right, (int)dst_bottom);
            final RectF rectF = new RectF(dst);

            paint.setAntiAlias(true);
             
            canvas.drawARGB(0, 0, 0, 0);
            paint.setColor(color);
            canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

            paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
            canvas.drawBitmap(bitmap, src, dst, paint);
            return output;
    }

}
