Question

所以我有facebook登录片段设置，但因为我正在使用SectionsPagerAdapter构建mutli-tab + swipe应用程序，所以我将登录（启动画面）构建到一个新活动中。如何在活动中管理会话？

修改

我要做的是将会话项放在SessionActivity中，并通过使用它的所有活动进行扩展。然后我设置了登录活动并将其作为我的主要入口点。

public class SessionActivity extends FragmentActivity {

private static final String TAG = "SessionActivity";
protected UiLifecycleHelper uiHelper;   

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    uiHelper = new UiLifecycleHelper(this, callback);
    uiHelper.onCreate(savedInstanceState);
}

public Session.StatusCallback callback = new Session.StatusCallback() {
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        onSessionStateChange(session, state, exception);

    }
};

protected void onSessionStateChange(Session session, SessionState state, Exception exception) {
    if (state.isOpened()) {
        Log.i(TAG, "Logged in...");
        Toast.makeText(this, "Logged in...", Toast.LENGTH_LONG).show();
        //Intent intent = new Intent(this, MainActivity.class);
        //startActivity(intent);
        //finish();
    } else if (state.isClosed()) {
        Log.i(TAG, "Logged out...");
        Toast.makeText(this, "Logged out...", Toast.LENGTH_LONG).show();
    }
}

@Override
public void onResume() {
    super.onResume();
    // For scenarios where the main activity is launched and user
    // session is not null, the session state change notification
    // may not be triggered. Trigger it if it's open/closed.
    Session session = Session.getActiveSession();
    if (session != null &&
           (session.isOpened() || session.isClosed()) ) {
        onSessionStateChange(session, session.getState(), null);  
    }
    uiHelper.onResume();
}

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

@Override
public void onPause() {
    super.onPause();
    uiHelper.onPause();
}

@Override
public void onDestroy() {
    super.onDestroy();
    uiHelper.onDestroy();
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    uiHelper.onSaveInstanceState(outState);
}

}

我的登录作为应用程序的主要入口点。这样，一旦用户登录，会话就会启动。

public class FacebookActivity extends SessionActivity {

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

}

此时onSessionStateChange应该处理显示登录屏幕或工作活动，但是我在这个例子中陷入无限循环打开和关闭登录。

    protected void onSessionStateChange(Session session, SessionState state, Exception exception) {
    if (state.isOpened()) {
        Log.i(TAG, "Logged in...");
        Toast.makeText(this, "Logged in...", Toast.LENGTH_LONG).show();
        //Intent intent = new Intent(this, MainActivity.class);
        //startActivity(intent);
        //finish();
    } else if (state.isClosed()) {
        Log.i(TAG, "Logged out...");
        Toast.makeText(this, "Logged out...", Toast.LENGTH_LONG).show();
    }
}

Answer 1

最后，我使用控制SessionActivity作为基础设置我的fb会话，并使用我正在使用的任何活动扩展它。然后我为登录过程设置了FacebookActivity。当扩展了SessionActivity的活动发现它没有fb会话时，它将打开FacebookActivity。如果他们退出FacebookActivity，它将再次打开自己，这使得一个漂亮的闪屏四周。

public class SessionActivity extends FragmentActivity {

protected GraphUser userDetails;

private static final String TAG = "SessionActivity";
protected UiLifecycleHelper uiHelper;   

public Session.StatusCallback callback = new Session.StatusCallback() {
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        onSessionStateChange(session, state, exception);

    }
};

protected void onSessionStateChange(Session session, SessionState state, Exception exception) {
    if (state.isOpened()) {
        Log.i(TAG, "Logged in...");
            getFbUserDetails(session);
    } else if (state.isClosed()) {
        Log.i(TAG, "Logged out...");
        Intent intent = new Intent(this, FacebookActivity.class);
        startActivity(intent);
    }
}

private void getFbUserDetails(final Session session) {
    Log.i(TAG, "Making fb API call...");
    // Make an API call to get user data and define a 
    // new callback to handle the response.
    Request request = Request.newMeRequest(session, 
            new Request.GraphUserCallback() {
        @Override
        public void onCompleted(GraphUser user, Response response) {
            // If the response is successful
            Log.i(TAG, "Processing fb response...");
            if (session == Session.getActiveSession()) {
                if (user !=null) {
                    Log.i(TAG, "Setting userDetails...");
                    userDetails = user;
                }
            }
            if (response.getError() != null) {
                // Handle errors, will do so later.
                Log.i(TAG, "Error while processing fb response...");
            }
        }
    });
    request.executeAsync();
}   
@Override
public void onStart() {
        super.onStart();
    Session session = Session.getActiveSession();

    if(session==null){                      
        // try to restore from cache
        session = Session.openActiveSessionFromCache(this);
    }

    if (session != null &&
           (session.isOpened() || session.isClosed()) ) {
        onSessionStateChange(session, session.getState(), null);  
    }

}

@Override
public void onResume() {
    super.onResume();
    Session session = Session.getActiveSession();

    if(session==null){                      
        // try to restore from cache
        session = Session.openActiveSessionFromCache(this);
    }

    if (session != null &&
           (session.isOpened() || session.isClosed()) ) {
        onSessionStateChange(session, session.getState(), null);  
    }           
}

}

public class FacebookActivity extends FragmentActivity {

private static final String TAG = "SessionActivity";
protected UiLifecycleHelper uiHelper;   

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    uiHelper = new UiLifecycleHelper(this, callback);
    uiHelper.onCreate(savedInstanceState);
    setContentView(R.layout.splash);
}

public Session.StatusCallback callback = new Session.StatusCallback() {
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        onSessionStateChange(session, state, exception);
    }
};

protected void onSessionStateChange(Session session, SessionState state, Exception exception) {
    if (state.isOpened()) {
        Log.i(TAG, "Logged in...");
        Toast.makeText(this, "Logged in...", Toast.LENGTH_LONG).show();
        //finish();
    } else if (state.isClosed()) {
        Log.i(TAG, "Logged out...");
        Toast.makeText(this, "Logged out...", Toast.LENGTH_LONG).show();
    }
}

@Override
public void onResume() {
    super.onResume();
    // For scenarios where the main activity is launched and user
    // session is not null, the session state change notification
    // may not be triggered. Trigger it if it's open/closed.
    Session session = Session.getActiveSession();
    if (session != null &&
           (session.isOpened() || session.isClosed()) ) {
        onSessionStateChange(session, session.getState(), null);  
    }       

    uiHelper.onResume();
}

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

@Override
public void onPause() {
    super.onPause();
    uiHelper.onPause();
}

@Override
public void onDestroy() {
    super.onDestroy();
    uiHelper.onDestroy();
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    uiHelper.onSaveInstanceState(outState);
}

}

public class MyActivity extends SessionActivity {

private static final String TAG = "MyActivity";

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

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.my, menu);
    return true;
}

}

<?xml version="1.0" encoding="utf-8"?>

    <com.facebook.widget.LoginButton
            android:id="@+id/authButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="30dp"
            android:layout_marginBottom="30dp" /> 
</LinearLayout>

管理活动中的Facebook会话

1 个答案: