fb sdk 4.18.0でログアウトボタンをクリックする方法は？

Question

私のアプリからログアウトして、のfacebookを使用してログインしたときに、いくつかの機能を実行したいのですが、ログインボタンonSuccess（）が呼び出され、表示されます。ログアウトボタンをクリックすると、ユーザーは単にログアウトされますが、特定の機能はありませんが呼び出され、ログアウト時にタスクを実行することができません。私に手伝ってください。事前に感謝します。私はfacebook sdk 4.18.0を使いました。

これはGoogleとFacebookのログイン用のボタンを含むLoginActivityのコードです。

public class LoginActivity extends AppCompatActivity implements View.OnClickListener, GoogleApiClient.OnConnectionFailedListener { 

    private GoogleApiClient mGoogleApiClient; 
    private SignInButton googleLoginButton; 
    private Button btnSignOut; 
    private Button btnRevokeAccess; 
    private AccessTokenTracker tokenTracker; 
    private ProfileTracker profileTracker; 
    private TextView mText; 
    private ImageView profile_pic; 
    private ProgressDialog mProgressDialog; 
    private LoginButton fbLoginButton; 
    private GoogleSignInResult result1; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     //FACEBOOK SDK 
     FacebookSdk.sdkInitialize(getApplicationContext()); 
     mcallbackManager = CallbackManager.Factory.create(); 
     tokenTracker = new AccessTokenTracker() { 
      @Override 
      protected void onCurrentAccessTokenChanged(AccessToken oldAccessToken, AccessToken currentAccessToken) { 

      } 
     }; 
     profileTracker = new ProfileTracker() { 
      @Override 
      protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) { 

      } 
     }; 
     profileTracker.startTracking(); 
     tokenTracker.startTracking(); 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_login); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 
     mText = (TextView) findViewById(R.id.txt); 
     profile_pic = (ImageView) findViewById(R.id.profile_pic); 
     googleLoginButton = (SignInButton) findViewById(R.id.google_login_button); 
     btnSignOut = (Button) findViewById(R.id.btn_sign_out); 
     btnRevokeAccess = (Button) findViewById(R.id.btn_revoke_access); 
     fbLoginButton = (LoginButton) findViewById(R.id.fb_login_button); 
     fbLoginButton.setReadPermissions("user_friends"); 
     fbLoginButton.registerCallback(mcallbackManager, callback); 
     FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
     fab.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) 
         .setAction("Action", null).show(); 
      } 
     }); 

     googleLoginButton.setOnClickListener(this); 
     btnSignOut.setOnClickListener(this); 
     btnRevokeAccess.setOnClickListener(this); 

     GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestProfile().requestId().requestEmail().build(); 
     mGoogleApiClient = new GoogleApiClient.Builder(this).enableAutoManage(this, this).addApi(Auth.GOOGLE_SIGN_IN_API, gso).build(); 

     googleLoginButton.setSize(SignInButton.SIZE_STANDARD); 
     googleLoginButton.setScopes(gso.getScopeArray()); 
    } 

    @Override 
    public void onDestroy() { 
     tokenTracker.stopTracking(); 
     profileTracker.stopTracking(); 
     super.onDestroy(); 
    } 

    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (requestCode == RC_SIGN_IN) { 
      GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data); 
      handleSignInResult(result); 
     } 
     mcallbackManager.onActivityResult(requestCode, resultCode, data); 
    } 

    @Override 
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 
     } 

    private static final int RC_SIGN_IN = 007; 

    private void signIn() { 
     Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient); 
     startActivityForResult(signInIntent, RC_SIGN_IN); 
    } 

    private void signOut() { 
     Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(new ResultCallback<Status>() { 
      @Override 
      public void onResult(@NonNull Status status) { 
       updateUI(false); 
      } 
     }); 
    } 

    private void revokeAccess() { 
     Auth.GoogleSignInApi.revokeAccess(mGoogleApiClient).setResultCallback(new ResultCallback<Status>() { 
      @Override 
      public void onResult(@NonNull Status status) { 
       updateUI(false); 
      } 
     }); 
    } 

    private void handleSignInResult(GoogleSignInResult result) { 
     if (result.isSuccess()) { 
      //Signed in successfully 
      (new SessionManager(LoginActivity.this)).setLogin(true); 
      GoogleSignInAccount acct = result.getSignInAccount(); 
      String personName = acct.getDisplayName(); 
      String email = acct.getEmail(); 
      mText.setText("Welcome " + personName + " " + email + " buddy!!"); 
      Picasso.with(this).load(acct.getPhotoUrl()).into(profile_pic); 
      updateUI(true); 
     } else { 
      updateUI(false); 
     } 
    } 

    public void onClick(View v) { 
     int id = v.getId(); 
     switch (id) { 
      case R.id.google_login_button: 
       signIn(); 
       break; 
      case R.id.btn_sign_out: 
       signOut(); 
       break; 
      case R.id.btn_revoke_access: 
       revokeAccess(); 
       break; 
     } 
    } 

    @Override 
    public void onStart() { 
     super.onStart(); 
     OptionalPendingResult<GoogleSignInResult> opr = Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient); 
     if (opr.isDone()) { 
      // If the user's cached credentials are valid, the OptionalPendingResult will be "done" 
      // and the GoogleSignInResult will be available instantly. 
      GoogleSignInResult result = opr.get(); 
      handleSignInResult(result); 
     } else { 
      // If the user has not previously signed in on this device or the sign-in has expired, 
      // this asynchronous branch will attempt to sign in the user silently. Cross-device 
      // single sign-on will occur in this branch. 
      showProgressDialog(); 
      opr.setResultCallback(new ResultCallback<GoogleSignInResult>() { 
       @Override 
       public void onResult(GoogleSignInResult googleSignInResult) { 
        hideProgressDialog(); 
        handleSignInResult(googleSignInResult); 
       } 
      }); 
     } 
    } 

    private void showProgressDialog() { 
     if (mProgressDialog == null) { 
      mProgressDialog = new ProgressDialog(this); 
      mProgressDialog.setMessage("Loading"); 
      mProgressDialog.setIndeterminate(true); 
     } 

     mProgressDialog.show(); 
    } 

    private void hideProgressDialog() { 
     if (mProgressDialog != null && mProgressDialog.isShowing()) { 
      mProgressDialog.hide(); 
     } 
    } 

    private void updateUI(boolean isSignedIn) { 
     if (isSignedIn) { 
      googleLoginButton.setVisibility(View.GONE); 
      btnSignOut.setVisibility(View.VISIBLE); 
      fbLoginButton.setVisibility(View.GONE); 
      btnSignOut.setEnabled(true); 
      btnRevokeAccess.setEnabled(true); 
      googleLoginButton.setEnabled(false); 
      btnRevokeAccess.setVisibility(View.VISIBLE); 
      } else { 
      googleLoginButton.setVisibility(View.VISIBLE); 
      fbLoginButton.setVisibility(View.VISIBLE); 
      btnSignOut.setVisibility(View.GONE); 
      btnSignOut.setEnabled(false); 
      btnRevokeAccess.setEnabled(false); 
      googleLoginButton.setEnabled(true); 
      btnRevokeAccess.setVisibility(View.GONE); 
      mText.setText("Hello Buddy Log in to know your name!!"); 
      profile_pic.setImageResource(R.drawable.common_full_open_on_phone); 

     } 
    } 

    private CallbackManager mcallbackManager; 
    private FacebookCallback<LoginResult> callback = new FacebookCallback<LoginResult>() { 
     @Override 
     public void onSuccess(LoginResult loginResult) { 
      (new SessionManager(LoginActivity.this)).setLogin(true); 
      AccessToken accessToken = loginResult.getAccessToken(); 
      Profile profile = Profile.getCurrentProfile(); 
      if (profile != null) { 
       // googleLoginButton.setVisibility(View.INVISIBLE); 
       mText.setText("Welcome " + profile.getName() + " buddy!!"); 
       Picasso.with(LoginActivity.this).load(profile.getProfilePictureUri(50, 50)).into(profile_pic); 
       //"https://graph.facebook.com/" +profile.getId() + "/picture?type=large" 
      } 
     } 

     @Override 
     public void onCancel() { 

      Snackbar.make(findViewById(R.id.rel_layout), "Login Attempt Cancelled!", Snackbar.LENGTH_LONG) 
        .setAction("Action", null).show(); 

     } 

     @Override 
     public void onError(FacebookException error) { 
      Snackbar.make(findViewById(R.id.rel_layout), error.getMessage().toString(), Snackbar.LENGTH_LONG) 
        .setAction("Action", null).show(); 
     } 
    }; 
    @Override 
    protected void onResume() { 
     super.onResume(); 
     Profile profile=Profile.getCurrentProfile(); 
     if(profile!=null) 
      displayWelcomeMessage(1); 
     result1=Auth.GoogleSignInApi.getSignInResultFromIntent(new Intent()); 
    } 
    private void displayWelcomeMessage(int i){ 
     mText.setText("Hello "+Profile.getCurrentProfile().getName()); 

    } 
} 

Answer 1

AccessTokenTrackerを使用できます。 nullトークンへの変更をリッスンする必要があります。彼らはをクリックして、ユーザーが のonClick

だけ loginButtonのビューを隠し、custom_logoutボタンをリッスン ..あなたはまた、ユーザーをログアウトし、そこにあなたの方法を使用するためにカスタムボタンを使用することができ、ログアウト

tokenTracker = new AccessTokenTracker() { 
     @Override 
     protected void onCurrentAccessTokenChanged(AccessToken oldAccessToken, AccessToken currentAccessToken) { 
      if (currentAccessToken == null) { 
        Log.d("FB", "User Logged Out."); 
        //Do your task here after logout 
       } 
     } 
    }; 
     tokenTracker.startTracking(); 

にログアウト意味

custom_logout.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      LoginManager.getInstance().logOut(); 
      //Do your task 
     } 
    });