当我尝试使用Facebook或Google登录Firebase时，我的应用程序崩溃了，因为它没有使用CreateNewUser()为Firebase创建新用户。
日志猫：-
05-10 09：11：58.180 16986-16986/com.example.sefi.authenticationproject E/VideoAdapter： onCreateViewHolder()>>05-10 09：11：58.191 16986-16986/com.example.sefi.authenticationproject E/VideoAdapter： onCreateViewHolder() <<05-10 09：11：58.193 16986-16986/com.example.sefi.authenticationproject E/VideoAdapter： onBindViewHolder()>> 0 05-10 09：11：58.203 16986-16986/com.example.sefi.authenticationproject E/Android运行时：致命 异常：主要 进程： com.example.sefi.authenticationproject， PID： 16986 java.lang.NullPointerException：尝试在空对象引用上调用虚拟方法 'java.lang.String java.lang.Object.toString()' at com.example.sefi.authenticationproject.adapter.VideoAdapter.onBindViewHolder(VideoAdapter.java：114) at com.example.sefi.authenticationproject.adapter.VideoAdapter.onBindViewHolder(VideoAdapter.java：32) at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java：6482) at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java：6515) at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java：5458) at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java：5724) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java：5563) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java：5559) at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java：2229) at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java：1556) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java：1516) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java：608) at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java：3693) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java：3410) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java：3962) at android.view.View.layout(View.java：18799) at android.view.ViewGroup.layout(ViewGroup.java：5952) at android.support.constraint.ConstraintLayout.onLayout(ConstraintLayout.java：1855) at android.view.View.layout(View.java：18799) at android.view.ViewGroup.layout(ViewGroup.java：5952) at android.widget.FrameLayout.layoutChildren(FrameLayout.java：323) at android.widget.FrameLayout.onLayout(FrameLayout.java：261) at android.view.View.layout(View.java：18799) at android.view.ViewGroup.layout(ViewGroup.java：5952) at android.widget.LinearLayout.setChildFrame(LinearLayout.java：1741) at android.widget.LinearLayout.layoutVertical(LinearLayout.java：1585) at android.widget.LinearLayout.onLayout(LinearLayout.java：1494) at android.view.View.layout(View.java：18799) at android.view.ViewGroup.layout(ViewGroup.java：5952) at android.widget.FrameLayout.layoutChildren(FrameLayout.java：323) at android.widget.FrameLayout.onLayout(FrameLayout.java：261) at com.android.internal.policy.DecorView.onLayout(DecorView.java：822) at android.view.View.layout(View.java：18799) at android.view.ViewGroup.layout(ViewGroup.java：5952) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java：2634) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java：2350) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java：1509) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java：7051) at android.view.Choreographer$CallbackRecord.run(Choreographer.java：927) at android.view.Choreographer.doCallbacks(Choreographer.java：702) at android.view.Choreographer.doFrame(Choreographer.java：638) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java：913) at android.os.Handler.handleCallback(Handler.java：751) at android.os.Handler.dispatchMessage(Handler.java：95) at android.os.Looper.loop(Looper.java：154) at android.app.ActivityThread.main(ActivityThread.java：6692) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java：1468) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java：1358)
登录活动.java
public class LogInActivity extends Activity {
public static final String TAG = "LogInActivity";
private static final int RC_GOOGLE_SIGN_IN = 1001;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
private CallbackManager mCallbackManager;
private AccessTokenTracker mAccessTokenTracker;
private GoogleSignInClient mGoogleSignInClient;
private EditText mEmail;
private EditText mPass;
private TextView mStatus;
private boolean mIsSignup;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.log_in_activity);
mEmail = findViewById(R.id.email_id);
mPass = findViewById(R.id.password_id);
mStatus = findViewById(R.id.status_id);
firebaseAuthenticationInit();
googleSigninInit();
facebookLoginInit();
}
@Override
protected void onStart() {
Log.e(TAG, "onStart() >>");
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
updateLoginStatus("N.A");
Log.e(TAG, "onStart() <<");
}
@Override
protected void onStop() {
Log.e(TAG, "onStop() >>");
super.onStop();
if (mAuthListener != null) {
mAuth.removeAuthStateListener(mAuthListener);
}
Log.e(TAG, "onStop() <<");
}
public void onEmailPasswordAuthClick(View V) {
Log.e(TAG, "onEmailPasswordAuthClick() >>");
String email = mEmail.getText().toString();
String pass = mPass.getText().toString();
Task<AuthResult> authResult;
boolean canContinue = checkIfEmailOrPasswordIsRequired(email, pass);
if (canContinue == true)
{
switch (V.getId()) {
case R.id.sign_in_id:
//Email / Password sign-in
authResult = mAuth.signInWithEmailAndPassword(email, pass);
moveToNextScreenAfterValidation(authResult);
mIsSignup = false;
break;
case R.id.sign_up_id:
//Email / Password sign-up
authResult = mAuth.createUserWithEmailAndPassword(email, pass);
mIsSignup = true;
moveToNextScreenAfterValidation(authResult);
break;
default:
return;
}
authResult.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Log.e(TAG, "Email/Pass Auth: onComplete() >> " + task.isSuccessful());
if (mIsSignup) {
createNewUser();
}
if (!task.isSuccessful())
{
Toast.makeText(LogInActivity.this, "User is already in use or there is a temporary problem", Toast.LENGTH_LONG).show();
}
updateLoginStatus(task.isSuccessful() ? "N.A" : task.getException().getMessage());
Log.e(TAG, "Email/Pass Auth: onComplete() <<");
}
});
}
Log.e(TAG, "onEmailPasswordAuthClick() <<");
}
public void signInAnonymously(View v) {
mAuth.signInAnonymously()
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
// Sign in success, update UI with the signed-in user's information
Log.d(TAG, "signInAnonymously:success");
FirebaseUser user = mAuth.getCurrentUser();
Intent intent = new Intent(LogInActivity.this,StandupPlayerMain.class);
startActivity(intent);
} else {
// If sign in fails, display a message to the user.
Log.w(TAG, "signInAnonymously:failure", task.getException());
Toast.makeText(LogInActivity.this, "Skip sign up failed", Toast.LENGTH_LONG).show();
}
}
});
}
public void onForgetPasswordClick(View V)
{
Intent intent = new Intent(LogInActivity.this,ForgotMyPassword.class);
startActivity(intent);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.e(TAG, "onActivityResult () >>");
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
if (requestCode == RC_GOOGLE_SIGN_IN) {
//Google Login...
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
try {
// Google Sign In was successful, authenticate with Firebase
GoogleSignInAccount account = task.getResult(ApiException.class);
firebaseAuthWithGoogle(account);
} catch (ApiException e) {
// Google Sign In failed, update UI appropriately
Log.e(TAG, "Google sign in failed", e);
Toast.makeText(LogInActivity.this, "Google signing in falied", Toast.LENGTH_LONG).show();
// ...
}
}
mCallbackManager.onActivityResult(requestCode, resultCode, data);
Log.e(TAG, "onActivityResult () <<");
}
private void facebookLoginInit() {
Log.e(TAG, "facebookLoginInit() >>");
mCallbackManager = CallbackManager.Factory.create();
LoginButton loginButton = findViewById(R.id.login_button);
loginButton.setReadPermissions("email", "public_profile");
loginButton.registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.e(TAG, "facebook:onSuccess () >>" + loginResult);
Log.e(TAG, "look for me");
createNewUser();
handleFacebookAccessToken(loginResult.getAccessToken());
Log.e(TAG, "facebook:onSuccess () <<");
}
@Override
public void onCancel() {
Log.e(TAG, "facebook:onCancel() >>");
updateLoginStatus("Facebook login canceled");
Log.e(TAG, "facebook:onCancel() <<");
}
@Override
public void onError(FacebookException error) {
Log.e(TAG, "facebook:onError () >>" + error.getMessage());
Toast.makeText(LogInActivity.this, "Facebook log in failed", Toast.LENGTH_LONG).show();
updateLoginStatus(error.getMessage());
Log.e(TAG, "facebook:onError <<");
}
});
mAccessTokenTracker = new AccessTokenTracker() {
@Override
protected void onCurrentAccessTokenChanged(AccessToken oldAccessToken,AccessToken currentAccessToken) {
Log.e(TAG, "facebook:inside Token change <<");
if (currentAccessToken == null)
{
mAuth.signOut();
updateLoginStatus("Facebook signuout");
}
Log.e(TAG,"onCurrentAccessTokenChanged() >> currentAccessToken="+
(currentAccessToken !=null ? currentAccessToken.getToken():"Null") +
" ,oldAccessToken=" +
(oldAccessToken !=null ? oldAccessToken.getToken():"Null"));
}
};
Log.e(TAG, "facebookLoginInit() <<");
}
private void handleFacebookAccessToken(AccessToken token) {
Log.e(TAG, "handleFacebookAccessToken () >>" + token.getToken());
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, "Facebook: onComplete() >> " + task.isSuccessful());
if(task.isSuccessful()==true)
{
Intent intent = new Intent(LogInActivity.this,StandupPlayerMain.class);
startActivity(intent);
}
updateLoginStatus(task.isSuccessful() ? "N.A" : task.getException().getMessage());
Log.e(TAG, "Facebook: onComplete() <<");
}
});
Log.e(TAG, "handleFacebookAccessToken () <<");
}
private void firebaseAuthenticationInit() {
Log.e(TAG, "firebaseAuthenticationInit() >>");
//Obtain reference to the current authentication
mAuth = FirebaseAuth.getInstance();
FirebaseUser user = mAuth.getCurrentUser();
if (user != null)
{
Intent intent = new Intent(LogInActivity.this,StandupPlayerMain.class);
startActivity(intent);
}
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
Log.e(TAG, "onAuthStateChanged() >>");
updateLoginStatus("N.A");
Log.e(TAG, "onAuthStateChanged() <<");
}
};
Log.e(TAG, "firebaseAuthenticationInit() <<");
}
private void googleSigninInit() {
Log.e(TAG, "googleSigninInit() >>" );
// Configure Google Sign In
GoogleSignInOptions gso = new GoogleSignInOptions
.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestProfile()
.requestEmail()
.build();
// Build a GoogleSignInClient with the options specified by gso.
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
findViewById(R.id.google_sign_in_button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.e(TAG, "look for me" + mAuth.getCurrentUser().toString());
onGooglesignIn();
}
});
Log.e(TAG, "googleSigninInit() <<" );
}
private void onGooglesignIn() {
Log.e(TAG, "onGooglesignIn() >>" );
createNewUser();
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, RC_GOOGLE_SIGN_IN);
Log.e(TAG, "onGooglesignIn() <<" );
}
private boolean checkIfEmailOrPasswordIsRequired(String email,String password)
{
boolean result = true;
if (email.length() == 0)
{
result = false;
Toast.makeText(LogInActivity.this, "Email is missing", Toast.LENGTH_LONG).show();
}
else if (password.length() == 0)
{
result = false;
Toast.makeText(LogInActivity.this, "Password is missing", Toast.LENGTH_LONG).show();
}
return result;
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
Log.e(TAG, "firebaseAuthWithGoogle() >>" + acct.getId());
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
updateLoginStatus(task.isSuccessful() ? "N.A" : task.getException().getMessage());
Log.e(TAG, "look for me");
Intent intent = new Intent(LogInActivity.this,StandupPlayerMain.class);
startActivity(intent);
}
});
Log.e(TAG, "firebaseAuthWithGoogle() <<");
}
private void moveToNextScreenAfterValidation(Task<AuthResult> authResult)
{
Log.e(TAG, "emailPasswordVaildation () >>");
authResult.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Log.e(TAG, "emailPasswordVaildation outside if");
if(task.isSuccessful() == true)
{
Log.e(TAG, "emailPasswordVaildation inside if");
//createNewUser();
Intent intent = new Intent(LogInActivity.this,StandupPlayerMain.class);
intent.putExtra("User Info",mAuth.getCurrentUser().getUid());
startActivity(intent);
}
}
});
Log.e(TAG, "emailPasswordVaildation () <<");
}
private void updateLoginStatus(String details) {
FirebaseUser user = mAuth.getCurrentUser();
if (user == null) {
mStatus.setText("SIGNED-OUT ndetails:" + details);
} else {
mStatus.setText("SIGNED-INnname:" + user.getDisplayName() +
"nemail:" + user.getEmail() +
"nuid:" + user.getUid() +
"ndetails:" + details);
}
}
private void createNewUser() {
Log.e(TAG, "createNewUser() >>");
FirebaseUser fbUser = mAuth.getCurrentUser();
DatabaseReference userRef = FirebaseDatabase.getInstance().getReference("Users");
if (fbUser == null) {
Log.e(TAG, "createNewUser() << Error user is null");
return;
}
Log.e(TAG,userRef.toString());
userRef.child(fbUser.getUid()).setValue(new User(fbUser.getEmail(),0,null));
Log.e(TAG, "createNewUser() <<");
}
}
我猜这是适配器中的一个错误，而不是当前活动。
您的日志显示：-尝试在com.example.sefi.authenticationproject.adapter.VideoAdapter.onBindViewHolder(VideoAdapter.java：114) 上的空对象引用上调用虚拟方法 'java.lang.String java.lang.Object.toString()'
您的问题在于活动/片段，您可能正在使用适配器"VideoAdapter"，并且可能有一些未定义的"视图"。
如果问题仍然存在，请使用调试器并逐行运行代码，并提供更详细和具体的问题。