我正在编写一个应该连接到firebase数据库的应用程序。一切正常，除了当我检查autenthication键（使用getAuth（）方法）时，它总是返回null。我在我的应用程序中使用facebook进行了autenthication，我想在我的数据库上启用autenthication：
{
"rules": {
".read": "auth != null",
".write":"auth != null"
}
}
我的项目有2个类，一个是LoginActivity，允许用户使用Facebook帐户在数据库中创建帐户：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
firebaseAutenthication = FirebaseAuth.getInstance();
//Get current user ID
FirebaseUser mUser = firebaseAutenthication.getCurrentUser();
if (mUser != null) {
// Club is signed in
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
String uid = firebaseAutenthication.getCurrentUser().getUid();
String image = firebaseAutenthication.getCurrentUser().getPhotoUrl().toString();
intent.putExtra("user_id", uid);
if (image != null || !Objects.equals(image, "")) {
intent.putExtra("profile_picture", image);
}
startActivity(intent);
finish();
Log.e(TAG, "onAuthStateChanged:signed_in:" + mUser.getUid());
}
//Setup firebase autenthication listener
firebaseAutenthicatorListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser mUser = firebaseAuth.getCurrentUser();
if (mUser != null) {
// Club is signed in
Log.e(TAG, "onAuthStateChanged:signed_in:" + mUser.getUid());
} else {
// Club is signed out
Log.e(TAG, "onAuthStateChanged:signed_out");
}
}
};
//Initialize facebook SDK
FacebookSdk.sdkInitialize(getApplicationContext());
if (BuildConfig.DEBUG) {
FacebookSdk.setIsDebugEnabled(true);
FacebookSdk.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
}
//Create callback manager for facebook login
//onSucces calls login method
//TODO: onCancel and OnError should display popup with information that login failed
callbackManagerFromFacebook = CallbackManager.Factory.create();
LoginButton loginButton = (LoginButton) findViewById(R.id.button_facebook_login);
loginButton.setReadPermissions("email", "public_profile");
loginButton.registerCallback(callbackManagerFromFacebook, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.e(TAG, "facebook:onSuccess:" + loginResult);
signInWithFacebook(loginResult.getAccessToken());
}
@Override
public void onCancel() {
Log.e(TAG, "facebook:onCancel");
}
@Override
public void onError(FacebookException error) {
Log.e(TAG, "facebook:onError", error);
}
});
}
@Override
protected void onStart() {
super.onStart();
firebaseAutenthication.addAuthStateListener(firebaseAutenthicatorListener);
}
@Override
public void onStop() {
super.onStop();
if (firebaseAutenthicatorListener != null) {
firebaseAutenthication.removeAuthStateListener(firebaseAutenthicatorListener);
}
}
//FaceBook
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManagerFromFacebook.onActivityResult(requestCode, resultCode, data);
}
private void signInWithFacebook(AccessToken token) {
Log.e(TAG, "signInWithFacebook:" + token);
showProgressDialog();
credential = FacebookAuthProvider.getCredential(token.getToken());
firebaseAutenthication.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(LoginActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
} else {
String uid = task.getResult().getUser().getUid();
String name = task.getResult().getUser().getDisplayName();
String email = task.getResult().getUser().getEmail();
Uri imageUri = task.getResult().getUser().getPhotoUrl();
String image = "";
if(imageUri != null) {
image = imageUri.toString();
}
//Create a new User and Save it in Firebase database
User user = new User(uid, name, null, email, null, null, "About Me");
firebaseUsers.child(uid).setValue(user);
//Start MainActivity and pass user data to it
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.putExtra("user_id", uid);
intent.putExtra("profile_picture", image);
startActivity(intent);
finish();
}
}
});
第二个是MainActivity，应该从他的Facebook个人资料中获取用户信息并将其放入数据库中：
void getValueFromFirebase() {
Log.e(TAG, "Started getValueFromFirebase()");
firebase.child(userID).child("name").addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String data = dataSnapshot.toString();
Toast.makeText(getApplicationContext(), data, Toast.LENGTH_LONG).show();
}
@Override
public void onCancelled(FirebaseError firebaseError) {
Toast.makeText(getApplicationContext(), firebaseError.toString(), Toast.LENGTH_LONG).show();
}
});
}
void createFirebaseConnection() {
this.firebase = new Firebase(AppConstants.FIREBASE_URL_USERS);
this.firebaseAuthentication = FirebaseAuth.getInstance();
this.firebaseUser = firebaseAuthentication.getCurrentUser();
//Create listener for firebase autenthication
//Log if user is disconnected
this.firebaseAutenthicationStateListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
// User is signed in
Log.e(TAG, "onAuthStateChanged:" + user.getUid());
} else {
// User is signed out
Log.d(TAG, "onAuthStateChanged: user is not signed in!");
}
}
};
firebaseAuthentication.addAuthStateListener(this.firebaseAutenthicationStateListener);
//Check if auth is done
//If not, autenthicate with Facebook Token
if(this.firebase.getAuth() == null) {
Log.e(TAG, "firebase.getAuth() == null, starting authWithFacebook()...");
authWithFacebook();
}
}
void authWithFacebook() {
Log.e(TAG, "authWithFacebook() started!");
AccessToken accessToken = AccessToken.getCurrentAccessToken();
AuthCredential credential = FacebookAuthProvider.getCredential(accessToken.getToken());
Log.e(TAG, "Facebook Token: " + accessToken.getToken());
Log.e(TAG, "Auth: " + firebase.getAuth());
}
void readDataFromLoginActivity() {
//Get the uid for the currently logged in Club from intent data passed to this activity
this.userID = getIntent().getExtras().getString("user_id");
//Get the imageUrl for the currently logged in Club from intent data passed to this activity
//Load image to ImageView
this.userImageUrl = getIntent().getExtras().getString("profile_picture");
}
@Override
public void onBackPressed() {
if (userProfile.moveState == 1) {
userProfile.slideBottom();
} else {
super.onBackPressed();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.e(TAG, "onCreate() called...");
setContentView(R.layout.activity_main);
lay = (RelativeLayout) findViewById(R.id.lay);
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y;
Log.e(TAG, "readDataFromLoginActivity() called...");
readDataFromLoginActivity();
Log.e(TAG, "createFirebaseConnection() called...");
createFirebaseConnection();
}
@Override
protected void onStart() {
super.onStart();
Log.e(TAG, "onStart() called...");
addTopTabBar();
addProfileFragment();
addLeftSideBar();
Log.e(TAG, "Binding UI Elements...");
bindUIElements();
getValueFromFirebase();
}
然而，我显示的吐司总是显示＆＃34;权限错误＆＃34;。我该如何解决这个问题？
答案 0 :(得分：1)
您在同一个应用中使用旧版2.x.x SDK和新的10.x.x SDK。这不是好的做法，可能是问题的根源。从依赖项中删除此行，并进行所需的代码更改，以仅使用新SDK的功能。
compile 'com.firebase:firebase-client-android:2.x.x'
新SDK的软件包名称以com.google.firebase开头。旧版SDK的那些以com.firebase.client开头。
有用的提示在Upgrade Guide。