Android：Facebook成功登錄后獲得“用戶訪問令牌”

Question

我一直在通過Facebook最新的SDK即3.0進行一些登錄項目。 我在獲取用戶訪問令牌方面遇到了困難。 我在互聯網上搜索了所有，最大的結果是使用了舊的SDK。 以下是我從Facebook Android SDK教程中獲取的一些代碼：

public class LoginActivity extends Activity implements OnClickListener {

Button login;
TextView accessToken;

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

    login = (Button) findViewById(R.id.login);
    accessToken = (TextView) findViewById(R.id.accessToken);

    login.setOnClickListener(this);

}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Session.getActiveSession().onActivityResult(this, requestCode,
            resultCode, data);
}

@Override
public void onClick(View v) {
    // start Facebook Login
    Session.openActiveSession(this, true, new Session.StatusCallback() {

        // callback when session changes state
        @Override
        public void call(Session session, SessionState state,
                Exception exception) {
            if (session.isOpened()) {

                // make request to the /me API
                Request.executeMeRequestAsync(session,
                        new Request.GraphUserCallback() {

                            // callback after Graph API response with user
                            // object
                            @Override
                            public void onCompleted(GraphUser user,
                                    Response response) {
                                if (user != null) {
                                    TextView welcome = (TextView) findViewById(R.id.welcome);
                                    welcome.setText("Hello "
                                            + user.getName() + "!");
                                }
                            }
                        });
            }
        }
    });

}

}

登錄成功，我可以在應用程序中看到用戶名，如Facbeook教程所示。

我嘗試過舊方法，但現在都已棄用。 請指導我獲取用戶訪問令牌。 幫助將不勝感激。

謝謝。

Answer 1

在onResume（）方法中添加以下代碼（在本例中我使用Toast.makeText來查看登錄后的令牌訪問）：

    Session session = Session.getActiveSession();
    if (session.isOpened()) {
        Toast.makeText(getActivity(), session.getAccessToken(), Toast.LENGTH_LONG).show();
    }

我使用了getActivity，因為在我的情況下它是在Fragment中，如果你在Activity中有你的登錄按鈕使用“this”而不是“getActivity（）”

Answer 2

注意：在新的Facebook sdk中刪除了會話類

在Facebook SDK version 4.X ，您應該使用以下內容：

AccessToken token = AccessToken.getCurrentAccessToken();
if (token != null) {
    Toast.makeText(getActivity(), token, Toast.LENGTH_LONG).show();
}

更改日志參考在這里。

將參考從Sdk 3.x遷移到4.x.

Answer 3

我是Android新手..
我正在使用上面的代碼來獲取令牌。

適用於Facebook SDK 4.21.0
編譯'com.facebook.android:facebook-android-sdk:4.21.0'

FacebookSdk.setIsDebugEnabled(true);              
FacebookSdk.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);

AccessToken token = AccessToken.getCurrentAccessToken();
Log.d("access only Token is", String.valueOf(token.getToken()));
String facebook_id_token = String.valueOf(token.getToken());

Answer 4

獲取facebook-sdk 4. *或更高版本的accessToken。 在facebookSDKInitialize（）之后添加這一行

FacebookSdk.setIsDebugEnabled(true);
FacebookSdk.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKEN);

之后使用這些代碼行，

AccessToken token = AccessToken.getCurrentAccessToken();
Log.d("Access Token is",token);

樣品：

 GraphRequestAsyncTask graphRequestAsyncTask = new GraphRequest(
    login_result.getAccessToken(),
    //AccessToken.getCurrentAccessToken(),
    "/me/friends",
    bundle,
    HttpMethod.GET,
    new GraphRequest.Callback() {
    public void onCompleted(GraphResponse response) {
    try {
    JSONArray rawName = response.getJSONObject().getJSONArray("data");
    Log.d("rawName friendList",String.valueOf(rawName));
    AccessToken token = AccessToken.getCurrentAccessToken();
    Log.d("access token is: ",String.valueOf(token));
    } catch (JSONException e) {
    e.printStackTrace();
    }
    }
    }
).executeAsync();

Answer 5

以下代碼已更新：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    callbackManager.onActivityResult(requestCode, resultCode, data);

    /** This block obtains Facebook UserID and Token */
    AccessToken token = AccessToken.getCurrentAccessToken();
    if (token != null) {
        Toast.makeText(this, token.toString(), Toast.LENGTH_SHORT).show();
        Log.e(TAG, "Token: " + token.getToken());
        Log.e(TAG, "UserID: " + token.getUserId());
    }
    /***/
}

Answer 6

我成功地在以下代碼的幫助下將Facebook sdk集成到我的my中：

public class MainActivity extends Activity implements OnClickListener {
    Facebook fb;
    Button button;
    SharedPreferences sp;
    //TextView welcome;

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

        String APP_ID = getString(R.string.APP_ID);
        fb=new Facebook(APP_ID);

        sp=getPreferences(MODE_PRIVATE);
        String access_token=sp.getString("access token",null);
        long expires=sp.getLong("access expires",0);

        if(access_token!=null){
            fb.setAccessToken(access_token);
        }
        if(expires!=0){
            fb.setAccessExpires(expires);
        }



        button=(Button)findViewById(R.id.login);
        //pic=(ImageView)findViewById(R.id.picture_pic);
        button.setOnClickListener(this);
        updateButtonImage();
    }

    private void updateButtonImage() {
        // TODO Auto-generated method stub
        if(fb.isSessionValid()){
            try{
                //post.setVisibility(Button.VISIBLE);
                button.setBackgroundResource(R.drawable.logout_button);
                /*pic.setVisibility(ImageView.VISIBLE);

                JSONObject obj=null;
                URL img_url = null;
                String jsonuser=fb.request("me");
                obj=Util.parseJson(jsonuser);

                String id = obj.optString("id");
                String name = obj.optString("name");
                welcome.setText("Welcome  "+name);
                img_url=new URL("http://graph.facebook.com/"+id+"/picture?type=large");
                Bitmap bmp =  BitmapFactory.decodeStream(img_url.openConnection().getInputStream());
                pic.setImageBitmap(bmp);*/
                buttonClicks();
                }catch(Exception e){
                    e.printStackTrace();
                }

        }else{
            //post.setVisibility(Button.INVISIBLE);
            button.setBackgroundResource(R.drawable.login_button);
            //pic.setVisibility(ImageView.INVISIBLE);
        }
    }

    public void buttonClicks()
    {
            Bundle params = new Bundle();
            params.putString("image", "your string");


            fb.dialog(MainActivity.this, "feed", params, new DialogListener(){

                @Override
                public void onComplete(Bundle values) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onFacebookError(FacebookError e) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onError(DialogError e) {
                    // TODO Auto-generated method stub

                }

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

                }

            });
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        if(fb.isSessionValid()){
            //button close our session - log out facebook
            try {
                fb.logout(getApplicationContext());
                updateButtonImage();
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }else{
            //login to fb
            fb.authorize(MainActivity.this, new String[] {"email"}, new DialogListener(){

                @Override
                public void onComplete(Bundle values) {
                    // TODO Auto-generated method stub
                    Editor editor=sp.edit();
                    editor.putString("access_token", fb.getAccessToken());
                    editor.putLong("access expires", fb.getAccessExpires());
                    editor.commit();
                    updateButtonImage();
                }

                @Override
                public void onFacebookError(FacebookError e) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "onFacebookError", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onError(DialogError e) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "onError", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onCancel() {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "onCancel", Toast.LENGTH_SHORT).show();
                }

            });
        }
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        fb.authorizeCallback(requestCode, resultCode, data);
    }
}

我希望，你會得到一些幫助。