Facebook Android SDK 3.0登錄按鈕不保存我的會話

Question

我正在嘗試Facebook Android SDK 3.0教程，但我遇到了一個問題。 當我點擊登錄按鈕並使用我的Facebook帳戶登錄時，我希望看到我的按鈕的文本更改為注銷作為教程（ http://developers.facebook.com/docs/howtos/androidsdk/3.0/login-與Facebook / ）狀態，但它沒有發生。 我添加了日志以查看它是否按照此問題的建議通過onActivityResult。 這是我的日志：

MainFragment   Unknown State: OPENING
MainFragment   onActivityResult
MainFragment   Logged out...

請幫忙。 我不知道我哪里出錯了，接下來該怎么辦？

MainFragment.java

public class MainFragment extends Fragment{

    private static final String TAG = "MainFragment";
    private UiLifecycleHelper uiHelper;
    private Session.StatusCallback callback = new Session.StatusCallback() {
        @Override
        public void call(Session session, SessionState state, Exception exception) {
            onSessionStateChange(session, state, exception);
        }
    };

    private void onSessionStateChange(Session session, SessionState state, Exception exception) {
        if (state.isOpened()) {
            Log.i(TAG, "Logged in...");
        } else if (state.isClosed()) {
            Log.i(TAG, "Logged out...");     
        } else {
            Log.d(TAG, "Unknown state: " + state);
        }
    }

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

    @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);
        Log.d(TAG, "onActivityResult");
    }

    @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);
    }   

    @Override
    public View onCreateView(LayoutInflater inflater,
            ViewGroup container, 
            Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.main, container, false);      

        LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
        authButton.setFragment(this);    

        return view;
    }
}

MainActivity.java

public class MainActivity extends FragmentActivity {

    private MainFragment mainFragment;
    private static final String TAG = "MainActivity";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (savedInstanceState == null) {
            // Add the fragment on initial activity setup
            mainFragment = new MainFragment();
            getSupportFragmentManager()
            .beginTransaction()
            .add(android.R.id.content, mainFragment)
            .commit();
        } else {
            // Or set the fragment from restored state info
            mainFragment = (MainFragment) getSupportFragmentManager()
            .findFragmentById(android.R.id.content);
        }
    }

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

}

main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <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"
    />

</LinearLayout>

Answer 1

我找到了解決方案。 keytool的哈希對我不起作用。 我按照卡里姆的回答 ，它對我有用。 將其放在MainActivity onCreate（）方法中，當然也可以更改為您的包名。 復制生成的哈希並使用它而不是keytool的哈希。

PackageInfo info = getPackageManager().getPackageInfo("<your_package_name>",  PackageManager.GET_SIGNATURES);

for (Signature signature : info.signatures)
    {
        MessageDigest md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
    }