Facebook在android中标记照片 - ＆gt; facebook sdk

Question

我正在使用facebook api来做一个Android应用程序。它要求用户选择朋友以查看标记的照片。 （即如果用户选择两个名称A和B - >他应该能够在一张照片中看到A和B）。为了实际操作，我使用图形api资源管理器，但发现很难提出请求调用。请参考图片：

对于我的查询，应使用上述信息。也就是说，当我提供“id（userID）”时，我需要获得“图片”..

请告诉我如何做到这一点！

Answer 1

这涉及五个步骤：

第1步：

登录Facebook：

private void loginToFacebook()
       {
           mPrefs = activity.getPreferences(Context.MODE_PRIVATE);
           facebook = new Facebook(APP_ID);
           accessToken = mPrefs.getString("access_token", null);
           long expires = mPrefs.getLong("access_expires", 0);

           if (accessToken != null)
           {
               facebook.setAccessToken(accessToken);
               uploadPhoto(facebook, imageBitmap, null);
           }

           if (expires != 0)
           {
               facebook.setAccessExpires(expires);
           }

           if (!facebook.isSessionValid())
           {
            facebook.authorize(activity, new String[] {"publish_stream"}, Facebook.FORCE_DIALOG_AUTH, new DialogListener() {

                    public void onFacebookError(FacebookError arg0) {
                        // TODO Auto-generated method stub

                    }

                    public void onError(DialogError arg0) {
                        // TODO Auto-generated method stub

                    }

                    public void onComplete(Bundle arg0) {
                            SharedPreferences.Editor editor = mPrefs.edit();
                            editor.putString("access_token", facebook.getAccessToken());
                            editor.putLong("access_expires", facebook.getAccessExpires());
                            editor.commit();                        
                            uploadPhoto(facebook, imageBitmap, null);                   
                    }

                    public void onCancel() {
                        // TODO Auto-generated method stub

                    }
                });

           }
       }

第2步：

将图像上传到Facebook（上传位图），请注意在login方法中调用此方法。 FOllowing方法返回上传图像的ID，因此在标记朋友时需要这样做：

public  String uploadPhoto(Facebook facebook, Bitmap image, String albumId)
        {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);

            if ( albumId == null ) {
                albumId = "me";
            }

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            image.compress(CompressFormat.JPEG, 75, bos);
            byte[] photoBytes = bos.toByteArray();

            Bundle params = new Bundle();
            params.putString(facebook.TOKEN, accessToken);
            params.putByteArray("picture", photoBytes);

            try {
                @SuppressWarnings("deprecation")
                String resp = facebook.request(albumId + "/photos", params, "POST");
                JSONObject json = Util.parseJson(resp);
                if(json.getString("id") != null){
                    Toast.makeText(activity, "Image Successfully uploaded to facebook!", Toast.LENGTH_SHORT).show();

                    tagFriends();

                }else{
                    Toast.makeText(activity, "Uploading failed, please try again!", Toast.LENGTH_SHORT).show();

                }
                uploadedImageID = json.getString("id");
                return json.getString("id");

            } catch ( IOException e ) {
                Toast.makeText(activity, "Uploading failed, please try again!", Toast.LENGTH_SHORT).show();

            } catch ( FacebookError e ) {
                Toast.makeText(activity, "Uploading failed, please try again!", Toast.LENGTH_SHORT).show();

            } catch ( JSONException e ) {
                Toast.makeText(activity, "Uploading failed, please try again!", Toast.LENGTH_SHORT).show();

            }

            return null;
        }

第3步：

获取您的Facebook帐户的所有朋友并存储在哈希地图中：

Bundle params = new Bundle();
                params.putString(Facebook.TOKEN, accessToken);   
                mAsyncRunner.request("me/friends" , params , "GET", new RequestListener()
                {

                    @Override
                    public void onMalformedURLException(MalformedURLException e, Object state)
                    {

                    }

                    @Override
                    public void onIOException(IOException e, Object state)
                    {

                    }

                    @Override
                    public void onFileNotFoundException(FileNotFoundException e, Object state)
                    {

                    }

                    @Override
                    public void onFacebookError(FacebookError e, Object state)
                    {

                    }

                    @Override
                    public void onComplete(String response, Object state)
                    {
                        try
                        {
                            JSONObject responseJsonObject = new JSONObject(response);
                            Log.d("InviteFriends.inviteFriends().new RequestListener() {...}:onComplete", "FB Response =>"+ responseJsonObject);
                            //event_id = event.getString("id");


                            //JSONObject responseJsonObject = new JSONObject(eventResponse);
                            JSONArray jsonArray = responseJsonObject.getJSONArray("data");


                            for (int i = 0; i < jsonArray.length(); i++)
                            {
                                HashMap<String, String> map = new HashMap<String, String>();
                                JSONObject e = jsonArray.getJSONObject(i);

                                map.put("id",    e.getString("id"));
                                map.put("name",  e.getString("name"));
                                mylist.add(map);

                                userIds = e.getString("id");
                                userName = e.getString("name");
                                Log.d("MainActivity:getAllEvents", "Friend ID, Name:" +  userIds + "," + userName);

                            }
                        }
                        catch (Exception e)
                        {
                            Log.e("log_tag", "Error parsing data "+e.toString());
                        }

第4步：

在列表视图中显示名称列表，并从列表中捕获用户触摸的用户名的用户ID，并将其存储在数组中：

final ListView friends = (ListView)  findViewById(R.id.lst_frnds);
ListAdapter adapter = new SimpleAdapter(getApplicationContext(), mylist , R.layout.friends_main,  new String[] {"name" }, new int[] {R.id.item_title});
                                Log.d( "size","Friends->" + mylist.size());
friends.setAdapter(adapter);
friends.setOnItemClickListener(new OnItemClickListener() {
                                    public void onItemClick(final AdapterView<?> parent, View view, int position, long id) {
                                        @SuppressWarnings("unchecked")
                                        HashMap<String, String> o = (HashMap<String, String>) friends.getItemAtPosition(position);
                                        String selectedName = o.get("name");
                                        String selectedId = o.get("id");
                                        Toast.makeText(MemeList.this, "Your friend " + selectedName + "' was selected.", Toast.LENGTH_SHORT).show();

                                        selectedFriendsIDs.add(selectedId);
                                        selectedFriendsNames.add(selectedName);
}

第5步：

从列表中标记选定的朋友：

btnSendInvites.setText(selectedFriendsIDs.size() + " selected, tag them now?");



                                        btnSendInvites.setOnClickListener(new OnClickListener() {

                                            @Override
                                            public void onClick(View v) {

                                                //Tagging friends 
                                                for(int i = 0; i < selectedFriendsIDs.size(); i++){

                                                    String inputParm = uploadedImageID + "/tags?to=" + selectedFriendsIDs.get(i);

                                                    Bundle params = new Bundle();
                                                    params.putString(Facebook.TOKEN, accessToken);   
                                                    mAsyncRunner.request(inputParm, params, "POST", new RequestListener()
                                                    {

                                                        @Override
                                                        public void onMalformedURLException(MalformedURLException e, Object state)
                                                        {

                                                        }

                                                        public void onIOException1(IOException e, Object state)
                                                        {

                                                        }

                                                        @Override
                                                        public void onFileNotFoundException(FileNotFoundException e, Object state)
                                                        {

                                                        }

                                                        @Override
                                                        public void onFacebookError(FacebookError e, Object state)
                                                        {

                                                        }

                                                        @Override
                                                        public void onComplete(String response, Object state)
                                                        {
                                                            Log.d("Selected IDs ", "" + selectedFriendsIDs);
                                                        }

                                                        @Override
                                                        public void onIOException(IOException e, Object state)
                                                        {
                                                            // TODO Auto-generated method stub

                                                        }
                                                    }, null);
                                                }


                                            }
                                        });

如果成功标记，将返回true。

希望这有助于某人！