android - 在 Facebook 帖子上分享多张图片

Question

我想在 Facebook 上分享多张图片和状态，但我无法发布所有图片。我正在从 sdcard 创建一个图像数组列表，并将每个图像转换为字节对象。下面是上传的代码。任何人都可以让我知道我缺少代码的地方或实现要求的任何更好的方法。

下面是点击分享按钮的代码:

public void loginToFacebook() {

        String hashKey = showHashKey(MainActivity.this);
        Log.d("hashKey", ">>> " + hashKey);

        mPrefs = getPreferences(MODE_PRIVATE);
        String access_token = mPrefs.getString("access_token", null);
        long expires = mPrefs.getLong("access_expires", 0);

        if (access_token != null) {
            facebook.setAccessToken(access_token);

            if (facebook.isSessionValid()) {
                Session session = facebook.getSession();
                postToWall();
            }
            Log.d("FB Sessions", "" + facebook.isSessionValid());
        }
        if (expires != 0) {
            facebook.setAccessExpires(expires);
        }
        if (!facebook.isSessionValid()) {
            facebook.authorize(this, new String[] { "publish_stream" },
                    new DialogListener() {
                        @Override
                        public void onCancel() {
                            // Function to handle cancel event
                            Log.e("Face onCancel", "-> ok");
                        }

                        @Override
                        public void onComplete(Bundle values) {
                            // Function to handle complete event
                            // Edit Preferences and update facebook acess_token
                            SharedPreferences.Editor editor = mPrefs.edit();
                            editor.putString("access_token",
                                    facebook.getAccessToken());
                            editor.putLong("access_expires",
                                    facebook.getAccessExpires());
                            editor.commit();
                            postToWall();
                            // Making show access tokens button visible
                        }

                        @Override
                        public void onError(DialogError error) {
                            Log.e("Face onError", "-> " + error);
                            // Function to handle error

                        }

                        @Override
                        public void onFacebookError(FacebookError fberror) {
                            // Function to handle Facebook errors
                            Log.e("Face onFacebookError", "-> " + fberror);

                        }

                    });
        }
    }



 public String showHashKey(Context context) {
        String hashkey = "";
        try {
            PackageInfo info = context.getPackageManager().getPackageInfo(
                    "com.example.demofacebook", PackageManager.GET_SIGNATURES); // Your
            // package
            // name
            // here
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                // Log.v("KeyHash:", Base64.encodeToString(md.digest(),
                // Base64.DEFAULT));
                hashkey = Base64.encodeToString(md.digest(), Base64.DEFAULT);
            }
        } catch (NameNotFoundException e) {
        } catch (NoSuchAlgorithmException e) {
        }
        return hashkey;
    }

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        facebook.authorizeCallback(requestCode, resultCode, data);
        if (data != null) {
            if (facebook.getSession() != null) {
                Session.getActiveSession().addCallback(statusCallback);
                Session.getActiveSession().onActivityResult(MainActivity.this,
                        requestCode, resultCode, data);
            }
        }
        // Session.getActiveSession().onActivityResult(this, requestCode,
        // resultCode, data);
        // Session.getActiveSession().onActivityResult(this, requestCode,
        // resultCode, data);

        // publishFeedDialog();
    }

    public void postToWall() {
        publishStory();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        // TODO Save current session
        super.onSaveInstanceState(outState);
        Session session = Session.getActiveSession();
        Session.saveSession(session, outState);
    }

    private class SessionStatusCallback implements Session.StatusCallback {

        @Override
        public void call(Session session, SessionState state,
                Exception exception) {
            // Check if Session is Opened or not, if open & clicked on share
            // button publish the story
            if (session != null && state.isOpened()) {
                Log.d("FbShare", "Session is opened");
                if (session.getPermissions().contains("publish_actions")) {
                    Log.d("FbShare", "Starting share");
                    publishAction();
                } else {
                    Log.d("FbShare", "Session dont have permissions");
                    publishStory();
                }
            } else {
                Log.d("FbShare", "Invalid fb Session");
            }
        }
    }

    private void publishStory() {

        Session session = Session.getActiveSession();
        if (session != null && session.getState().isOpened()) {
            checkSessionAndPost();
        } else {
            Log.d("FbShare", "Session is null");
            // session = new Session(ShareActivity.this);
            session = new Session.Builder(this).setApplicationId(APP_ID)
                    .build();
            Session.setActiveSession(session);
            session.addCallback(statusCallback);

            Log.d("FbShare", "Session info - " + session);
            try {
                Log.d("FbShare", "Opening session for read");
                session.openForRead(new Session.OpenRequest(MainActivity.this));
            } catch (UnsupportedOperationException exception) {
                exception.printStackTrace();
                Log.d("FbShare", "Exception Caught");
                Toast.makeText(MainActivity.this,
                        "Unable to post your score on facebook",
                        Toast.LENGTH_LONG).show();
            }
        }
    }

    private void checkSessionAndPost() {

        Session session = Session.getActiveSession();
        session.addCallback(statusCallback);
        Log.d("FbShare",
                "Session Permissions Are - " + session.getPermissions());
        if (session.getPermissions().contains("publish_actions")) {
            publishAction();
        } else {
            session.requestNewPublishPermissions(new Session.NewPermissionsRequest(
                    MainActivity.this, permissions));
        }
    }
// filePaths is arraylist of the images from sdcard
    private void publishAction() {
        final Bundle params = new Bundle();
        FileInputStream stream = null;
        byte[] imgData = null;
        try {
            params.putString("name", "Hello Wednesday test 20 Nov");
            params.putString("caption", "test 20 Nov");
            params.putString("link", "");
            String[] byteStrings = new String[3];
            for (int i = 0; i < filePaths.size(); i++) {
                Log.i("PASSED FILE", "==== " + filePaths.get(i));
                Log.i("PICTURE FILE", "==== " + "picture" + (i + 1));
                stream = new FileInputStream(filePaths.get(i));
                Bitmap bitmap = BitmapFactory.decodeStream(stream);
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                bitmap.compress(CompressFormat.JPEG, 100, bos);
                imgData = bos.toByteArray();
                byteStrings[i] = filePaths.get(i).toString();
                params.putByteArray("picture" + i + 1, imgData);
            }
            // params.putStringArray("images" , byteStrings);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        // params.putString(
        // "description",
        // "");

        // params.putString("picture", ""+imgData);
        // params.putByteArray("picture2", imgData);
        // params.putByteArray("picture3", imgData);
        // params.putStringArrayList("picture", filePaths);

        new Thread(new Runnable() {
            @SuppressWarnings("unused")
            @Override
            public void run() {
                try {
                    final String response = facebook.request("me/photos",
                            params, "POST");
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(getApplicationContext(),
                                    "Post uploaded successfully",
                                    Toast.LENGTH_SHORT).show();
                            Utility.dismissCustomProgressDialog();
                        }
                    });
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                    Utility.dismissCustomProgressDialog();
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                    Utility.dismissCustomProgressDialog();
                } catch (IOException e) {
                    e.printStackTrace();
                    Utility.dismissCustomProgressDialog();
                }
            }
        }) {
        }.start();

    }

Answer 1

您正在混合使用 Session(在 SDK v3.0 中引入)和 Facebook(现已弃用)，两者都管理您的访问 token 并帮助您发出请求。这使您的逻辑很难破译。请坚持仅使用 session ，并删除所有已弃用代码的使用(Facebook 类中的所有内容)。

其次，有一个帮助您上传照片的辅助方法，它在 Request 类中:https://developers.facebook.com/docs/reference/android/3.0/Request#newUploadPhotoRequest(Session,%20Bitmap,%20Callback) .它也重载以获取位图或文件。

如果要上传多张照片，可以创建多个请求，然后将它们添加到一个批处理中，例如:

Request r1 = Request.newUploadPhotoRequest(...);
Request r2 = Request.newUploadPhotoRequest(...);
RequestBatch batch = new RequestBatch(r1, r2);
batch.executeAsync();

最后，me/photos 端点只接受“source”(图片)、“message”和“place”参数，不接受“caption”或“link”。请在此处查看详细文档 https://developers.facebook.com/docs/reference/api/user/#photos