问题
I am using facebook SDK 4.4.0. i want to logout in facebook from another activity? How can I add logout functionality in another activity ? I want to go to another activity after successful login and add logout functionality in that activity
loginButton.registerCallback(callbackManager,
new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
new fblogin().execute(loginResult.getAccessToken());
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException e) {
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
class fblogin extends AsyncTask<AccessToken, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Wait.....");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(AccessToken... params) {
GraphRequest request = GraphRequest.newMeRequest(params[0],
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object,
GraphResponse response) {
Log.v("MainActivity", response.toString());
try {
username = object.getString("first_name");
emailid = object.getString("email");
gender = object.getString("gender");
Log.v("User Name", username);
Log.v("Email", emailid);
Log.v("Gender", gender);
} catch (JSONException e) {
// TODO Auto-generated catch
// block
e.printStackTrace();
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields",
"id,first_name,email,gender,birthday");
request.setParameters(parameters);
request.executeAndWait();
return null;
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
}
}
回答1:
First initialize the FacebookSdk.sdkInitialize(getApplicationContext()); on your activity then write the below code on button click event:
LoginManager.getInstance().logOut();
It is done!!!
回答2:
Try this method
public static void LogoutFB(Context context) {
Session session = Session.getActiveSession();
if (session != null) {
if (!session.isClosed()) {
session.closeAndClearTokenInformation();
//clear your preferences if saved
}
} else {
session = new Session(context);
Session.setActiveSession(session);
session.closeAndClearTokenInformation();
//clear your preferences if saved
}
}
回答3:
Make sure to hide the visibility of Facebook's Login Button after SignIN.
Then setOnClickListner on normal Button and use this command :
LoginManager.getInstance().logOut();
and a Toast to confirm the user.
来源：https://stackoverflow.com/questions/31758824/how-to-logout-in-facebook-from-another-activity