android开发之 - 圆形头像

https://github.com/MostafaGazar/CustomShapeImageView

一段代码,可以设置圆形头像.

返回一个Bitmap对象.

==> 该列子是从网络上获取一张图片。然后展示在ImageView的。

1：首先要确保网络权限

 <!-- 访问网络权限 -->
    <uses-permission android:name="android.permission.INTERNET" />

以下是关键代码：

private InputStream inputStream;
Bitmap output;

new Thread(new Runnable() {
            URL url;

            @Override
            public void run() {
                // TODO Auto-generated method stub
                try {
                    url = new URL(
                            "http://99touxiang.com/public/upload/rihan/15/13-042315_940.jpg");
                    inputStream = url.openStream();
                    // 将字节流转换为Bitmap,使用BitmapFactory工厂类进行转换
                    Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
                    output = getRoundedCornerBitmap(bitmap);
                    header_image.post(new Runnable() {

                        @Override
                        public void run() {
                            // TODO Auto-generated method stub
                            // 更新界面
                            header_image.setImageBitmap(output);
                        }
                    });

                } catch (MalformedURLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }
        }).start();

圆形头像代码：


1  

 /* 圆形头像
 2      * 
 3      * @param bitmap
 4      * @param ratio
 5      *            按照截取比例来获取圆形图片
 6      * @return
 7      */
 8     public Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
 9         if (bitmap == null) {
10             bitmap = BitmapFactory.decodeStream(inputStream);
11         }
12         Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(),
13                 bitmap.getHeight(), Config.ARGB_8888);//Bitmap.Config.ARGB_4444比Bitmap.Config.ARGB_8888更省内存
14         Canvas canvas = new Canvas(outBitmap);
15         final int color = 0xff424242;
16         final Paint paint = new Paint();
17         final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
18         final RectF rectF = new RectF(rect);
19         final float roundPX = bitmap.getWidth() / 2 < bitmap.getHeight() / 2 ? bitmap
20                 .getWidth() : bitmap.getHeight();
21         paint.setAntiAlias(true);
22         canvas.drawARGB(0, 0, 0, 0);
23         paint.setColor(color);
24         canvas.drawRoundRect(rectF, roundPX, roundPX, paint);
25         paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
26         canvas.drawBitmap(bitmap, rect, rect, paint);
27         return outBitmap;
28     }
29

额.复制粘贴试试吧.

posted @ 2014-07-25 10:35 Somnus_W 阅读(989) 评论(0) 编辑收藏举报

Somnus_丶

android开发之 - 圆形头像

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