程式碼示例：

新增sdk依賴：

public class MainActivity extends AppCompatActivity {
    private ProgressDialog progressDlg;
    private Intent intent;

    private final int NONE=0,LOCAL_PICTURE=1,UPLOAD_TAKE_PICTURE=2,SAVE_THEME_IMAGE=3;
    private String takePictureUrl,upToken, imageFileName;

    ImageView photo;
    TextView select_local_picture;
    TextView download_picture;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        photo=(ImageView)findViewById(R.id.imageView);                     //上傳和下載的圖片位置
        select_local_picture=(TextView)findViewById(R.id.textView);        //上傳圖片的按鈕
        download_picture=(TextView)findViewById(R.id.textView2);

        //點選選擇本地圖片
        select_local_picture.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent();
                intent.setAction(Intent.ACTION_GET_CONTENT);
                intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                        "image/*");
                startActivityForResult(intent,LOCAL_PICTURE);
            }
        });
 

        //點選下載圖片
        download_picture.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                HashMap map = new HashMap();
                map.put("請求型別", "請求下載圖片");
                requestFragment.httpRequest(map, CommonUrl.getPhoto);        //伺服器請求
            }
        });

    }

 

    //選擇圖片完成後
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode==NONE)
            return;
        //耗時操作傳到handler裡去處理
        if(resultCode== Activity.RESULT_OK){
            this.intent=data;
            handler.sendEmptyMessage(LOCAL_PICTURE);
        }
    }

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {

                case LOCAL_PICTURE:       
                    //處理本地選擇的圖片
                    Uri uri=intent.getData();
                    String photo_local_file_path="圖片地址";     //使用uri獲取圖片地址略
                    if (!(photo_local_file_path.toString().toLowerCase().endsWith("jpg")||photo_local_file_path.toString().toLowerCase().endsWith("png")
                            ||photo_local_file_path.toString().toLowerCase().endsWith("jpeg")||photo_local_file_path.toString().toLowerCase().endsWith("gif"))) {
                        Toast.makeText(MainActivity.this, "不支援此格式的上傳", Toast.LENGTH_LONG).show();
                        break;
                    }
 

                    //簡單壓縮圖片
                    Bitmap bitmap2=PhotoUtil.getInstance().trasformToZoomPhotoAndLessMemory(photo_local_file_path);
                    Drawable addPicture =new BitmapDrawable(getResources(), bitmap2);
                    takePictureUrl=photo_local_file_path;
                    photo.setImageDrawable(addPicture);
                {
                    //imageFileName為儲存在伺服器端的圖片名
                    imageFileName = "username" + "/" + takePictureUrl.hashCode() + new Random(System.nanoTime()).toString();
                    HashMap map = new HashMap();
                    map.put("請求型別", "請求獲得token");
                    map.put("image", imageFileName);
                    Log.d("選擇了本地照片", "正在請求伺服器端獲取token");
                    requestFragment.httpRequest(map,Url.getToken);
                }
                break;
                case UPLOAD_TAKE_PICTURE:  //獲取token之後
                {

                    //使用SDK傳輸到七牛雲
                    UploadManager uploadmgr = new UploadManager();
                    File data = new File(takePictureUrl);
                    String key = imageFileName;
                    String token = upToken;
                    progressDlg = ProgressDialog.show(MainActivity.this, "上傳圖片", "正在上傳圖片", true, true, new DialogInterface.OnCancelListener() {
                        @Override
                        public void onCancel(DialogInterface dialogInterface) {
                            //取消了上傳
                        }
                    });
                    progressDlg.setMax(101);
                    uploadmgr.put(data, key, token, new UpCompletionHandler() {
                        @Override
                        public void complete(String key, ResponseInfo info, JSONObject response) {
                            //完成，發信息給業務伺服器
                            Log.d("to第三方結果",response.toString());
                            new Thread() {
                                public void run() {
                                    Map<String, Object> map = new HashMap<>();
                                    Message msg = handler.obtainMessage();
                                    msg.obj = map;
                                    msg.what = SAVE_THEME_IMAGE;
                                    handler.sendMessage(msg);//要上傳的圖片包裝在msg後變成了訊息發到handler
                                }
                            }.start();
                        }
                    }, new UploadOptions(null, null, false,
                            new UpProgressHandler() {
                                public void progress(String key, double percent) {
                                    //mProgress.setProgress((int)percent*100);
                                    progressDlg.setProgress((int) percent * 100);
                                }
                            }, null));
                }
                break;
                case SAVE_THEME_IMAGE: //傳到第三方之後告知伺服器
                    progressDlg.dismiss();
                {
                    HashMap map = new HashMap();
                    map.put("請求型別","上傳到七牛");
                    map.put("image",imageFileName);
                    requestFragment.httpRequest(map, "完成傳輸");     //在伺服器儲存圖片（只儲存圖片名）
                }
                progressDlg=ProgressDialog.show(MainActivity.this, "上傳圖片", "正在儲存圖片", true, true, new DialogInterface.OnCancelListener() {
                    @Override
                    public void onCancel(DialogInterface dialogInterface) {
                        //上傳完圖片後取消了儲存
                    }
                });
                break;
                default: //使用者身份認證失敗
                {

                    break;
                }
            }
        }
    };

    //伺服器端的響應
    public void requestFinish(String result, String requestUrl) throws JSONException {
        Message message = new Message();

        //獲取token
        if(requestUrl.equals(("獲取口令"))){
            JSONObject jsonObject=new JSONObject(result);
            int code = Integer.valueOf(jsonObject.getString("code"));
            if (code == 1) {
                JSONArray token = jsonObject.getJSONArray("contents");
                upToken = token.getString(0);//成功獲取口令
                handler.sendEmptyMessage(UPLOAD_TAKE_PICTURE);
                return;
            }
            else{
                Toast.makeText(MainActivity.this, "獲取口令失敗", Toast.LENGTH_LONG).show();
            }
        }
        if (requestUrl.equals("下載圖片")) {
            JSONObject object = new JSONObject(result);
            int code = Integer.valueOf(object.getString("code"));
            if (code == 1) {
               String url = "從伺服器獲得圖片的url地址";
                //使用picasso等圖片處理庫獲取圖片
                return;
            } else {
                //  Toast.makeText(profileActivity.this, "未知錯誤", Toast.LENGTH_LONG).show();
                return;
            }
        }
    }
}