1 // 根据网络URL获取输入流 2     public InputStream getUrlInputStream(String strUrl) throws IOException { 3         URL url = new URL(strUrl); 4         HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 5         InputStream inputStream = conn.getInputStream(); 6         if (inputStream != null) { 7             return inputStream; 8         } else { 9             Log.i("inputStream", "输入流对象为空");10             return null;11         }12     }13 14     // 将输入流转化为Bitmap流15     public Bitmap getBitmap(InputStream inputStream) {16         Bitmap bitmap = null;17         if (inputStream != null) {18             bitmap = BitmapFactory.decodeStream(inputStream);19             return bitmap;20         } else {21             Log.i("test", "输入流对象in为空");22             return null;23         }24     }25 26     // 给ImageView对象赋值27     public void setWidgetImage(Bitmap bitmap) {28         ImageView img = new ImageView(this);29         if (bitmap != null) {30             img.setImageBitmap(bitmap);31         }32     }33 34     // 获取SD卡上的文件存储路径35     public void createSDFile() {36         File sdroot = Environment.getExternalStorageDirectory();37         File file = new File(sdroot + "/Android/date/包名/文件名");38         if (Environment.MEDIA_MOUNTED.equals(Environment39                 .getExternalStorageState())) {40             // 相关操作41         }42     }43 44     // 将图片保存到SD卡上45     public boolean readToSDCard(File file, Bitmap bitmap)46             throws FileNotFoundException {47         FileOutputStream os = new FileOutputStream(file);48         return bitmap.compress(Bitmap.CompressFormat.PNG, 90, os);49         // true:表示操作成功，false:表示操作失败50     }