我正在使用带Firebase的facebook auth medthod,但无法弄清楚如何正确注销用户。当我按下“继续使用Facebook”按钮并允许其访问我的个人资料后,该按钮将在“注销”中更改,并在单击时显示一个对话框。问题在于它实际上并没有注销我,并且状态仍处于登录状态。
我在应用程序中找到了here如何从Firebase和Facebook中注销用户,但是我不知道将这两行放在哪里。我正在寻找注销功能或类似功能。
我发现here (different here)可能是我的解决方案,但它非常混乱并且无法理解。你能帮我么?
@Override
protected void onCreate(Bundle savedInstanceState) {
mAuth = FirebaseAuth.getInstance();
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
AppEventsLogger.activateApp(this);
setContentView(R.layout.activity_login);
mCallbackManager = CallbackManager.Factory.create();
LoginButton loginButton = (LoginButton) findViewById(R.id.button_facebook_login);
loginButton.setReadPermissions("email", "public_profile");
loginButton.registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.e(TAG, "facebook:onSuccess:" + loginResult);
handleFacebookAccessToken(loginResult.getAccessToken());
}
@Override
public void onCancel() {
Log.e(TAG, "facebook:onCancel");
// ...
}
@Override
public void onError(FacebookException error) {
Log.e(TAG, "facebook:onError", error);
// ...
}
});
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
final FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
// User is signed in
Log.e(TAG, "onAuthStateChanged:signed_in:" + user.getUid());
DatabaseReference myRef = database.getReference("Users");
myRef.addValueEventListener(new ValueEventListener() {
boolean userExists = false;
User userFirebase;
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot mydata : dataSnapshot.getChildren()){
userFirebase = mydata.getValue(User.class);
if(userFirebase.getEmail().equals(user.getEmail())){
Log.e(TAG, "User found in the database");
userExists = true;
Intent intent = new Intent(getBaseContext(), ActivityMain.class);
startActivity(intent);
break;
}
}
if (!userExists){
DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference();
mDatabase.child("Users").push().setValue(new User(user.getDisplayName(),user.getEmail(),0,0));
Intent intent = new Intent(getBaseContext(), ActivityMain.class);
startActivity(intent);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
}); // checks if the user is in database and writes him if not
} else {
// User is signed out
Log.e(TAG, "onAuthStateChanged:signed_out");
}
}
};
}
@Override
public void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
@Override
public void onStop() {
super.onStop();
if (mAuthListener != null) {
mAuth.removeAuthStateListener(mAuthListener);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Pass the activity result back to the Facebook SDK
mCallbackManager.onActivityResult(requestCode, resultCode, data);
}
private void handleFacebookAccessToken(AccessToken token) {
Log.e(TAG, "handleFacebookAccessToken:" + token);
AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Log.e(TAG, "signInWithCredential:onComplete:" + task.isSuccessful());
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
Log.e(TAG, "signInWithCredential", task.getException());
Toast.makeText(getBaseContext(), "Authentication failed.",
Toast.LENGTH_SHORT).show();
}
// ...
}
});
}
最佳答案
您需要实现自己的按钮,并使用上述2种方法添加和OnClickListener:
Button logoutButton = (Button) findViewById(R.id.logout_button);
logoutButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
FirebaseAuth.getInstance().signOut();
LoginManager.getInstance().logOut();
}
});
您无法使用Facebook注销按钮,因为它仅使您注销Facebook,并且您也需要注销Firebase。