android 取得系统联系人的头像

  ImageView imageView=new ImageView(this);
        Uri uri=ContactsContract.Data.CONTENT_URI;
        Cursor cursor=getContentResolver().query(uri, new String[]{ContactsContract.Data.DATA15}, null, null, null);
        cursor.moveToFirst();
        do{
         byte[] str=cursor.getBlob(cursor.getColumnIndex(ContactsContract.Data.DATA15));
         
         if(str!=null){
          InputStream inputStream=new ByteArrayInputStream(str);
          Bitmap bitmap=BitmapFactory.decodeStream(inputStream);
          imageView.setImageBitmap(bitmap);
         }
        }while(cursor.moveToNext());
        setContentView(imageView);