public class MainActivity extends Activity {         private ImageView iv;         private String appKey="";                //填写你的Application ID         private String path=Environment.getExternalStorageDirectory()+"/11.jpeg";        //要上传的图片的路径         public final int SIZE=2*1024;                        protected void onCreate(Bundle savedInstanceState) {                 super.onCreate(savedInstanceState);                 Bmob.initialize(this, appKey);                //初始化bmob SDK                 setContentView(R.layout.activity_main);                 initView();         }         private void initView() {                 // TODO Auto-generated method stub                 iv=(ImageView)findViewById(R.id.iv);         }         /**          * 上传文件到bmob后台          * */         public void upload(View v){                 final BmobFile file=new BmobFile(new File(path));                 file.uploadblock(this, new UploadFileListener() {                         @Override                         public void onSuccess() {                                 // TODO Auto-generated method stub                                 Person p=new Person();                                 p.setUrl(file.getFileUrl(MainActivity.this));                                 p.save(MainActivity.this);                                 MyTask task=new MyTask();                                 task.execute(file.getFileUrl(MainActivity.this));                                 toast("上传成功 ");                         }                         @Override                         public void onFailure(int arg0, String arg1) {                                 // TODO Auto-generated method stub                                 toast("上传失败 "+arg1);                                 Log.i("---------", "------error "+arg1);                         }                 });         }         /**          * 根据URL获取Bitmap          * */         public Bitmap getHttpBitmap(String url){                 Bitmap bitmap=null;                 URL myUrl;                 try {                         myUrl=new URL(url);                         HttpURLConnection conn=(HttpURLConnection)myUrl.openConnection();                         conn.setConnectTimeout(5000);                         conn.connect();                         InputStream is=conn.getInputStream();                         bitmap=BitmapFactory.decodeStream(is);                         //把bitmap转成圆形                         bitmap=toRoundBitmap(bitmap);                         is.close();                 } catch (MalformedURLException e) {                         // TODO Auto-generated catch block                         e.printStackTrace();                 } catch (IOException e) {                         // TODO Auto-generated catch block                         e.printStackTrace();                 }                 //返回圆形bitmap                 return bitmap;         }         /**          * 把bitmap转成圆形          * */         public Bitmap toRoundBitmap(Bitmap bitmap){                 int width=bitmap.getWidth();                 int height=bitmap.getHeight();                 int r=0;                 //取最短边做边长                 if(width<height){                         r=width;                 }else{                         r=height;                 }                 //构建一个bitmap                 Bitmap backgroundBm=Bitmap.createBitmap(width,height,Config.ARGB_8888);                 //new一个Canvas，在backgroundBmp上画图                 Canvas canvas=new Canvas(backgroundBm);                 Paint p=new Paint();                 //设置边缘光滑，去掉锯齿                 p.setAntiAlias(true);                 RectF rect=new RectF(0, 0, r, r);                 //通过制定的rect画一个圆角矩形，当圆角X轴方向的半径等于Y轴方向的半径时，                  //且都等于r/2时，画出来的圆角矩形就是圆形                 canvas.drawRoundRect(rect, r/2, r/2, p);                 //设置当两个图形相交时的模式，SRC_IN为取SRC图形相交的部分，多余的将被去掉                 p.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));                 //canvas将bitmap画在backgroundBmp上                 canvas.drawBitmap(bitmap, null, rect, p);                 return backgroundBm;         }         class MyTask extends AsyncTask<String, String, Bitmap>{                   @Override                 protected Bitmap doInBackground(String... arg0) {                         // TODO Auto-generated method stub                         String url=arg0[0];                         Bitmap bm=getHttpBitmap(url);                         return bm;                 }                 @Override                 protected void onPostExecute(Bitmap result) {                         // TODO Auto-generated method stub                         iv.setImageBitmap(result);                 }         }         public void toast(String msg){                 Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();         } }