• 我正在尝试通过 Firebase 构建具有登录/注册功能的应用程序。我正在与合作伙伴一起工作(他在 Linux 上，我在 Mac 上)，他能够使身份验证工作，但出于某种原因我不能。我们在 SDK 管理器中检查了所有相同的代码和 SDK 工具，运行相同版本的所有内容。

• 这是 gradle 文件:

  
  compile 'com.android.support:appcompat-v7:25.3.0'
  compile 'com.android.support.constraint:constraint-layout:1.0.2'
  compile 'com.google.firebase:firebase-auth:10.2.1'
  compile 'com.android.support:design:25.3.0'
  testCompile 'junit:junit:4.12' 
  

• 和代码:

    public class RegisterActivity extends AppCompatActivity {
    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener mAuthListener;

    private EditText mUsernameField;
    private EditText mPasswordField;
    private EditText mConfirmPasswordField;

    private Button mRegisterButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        mUsernameField = (EditText) findViewById(R.id.enterUsername);
        mPasswordField = (EditText) findViewById(R.id.enterPassword);
        mConfirmPasswordField = (EditText) findViewById(R.id.confirmPassword);
        mRegisterButton = (Button) findViewById(R.id.confirmRegistration);

        mRegisterButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                createAccount(mUsernameField.getText().toString(), mPasswordField.getText().toString());
            }
        });
        mAuth = FirebaseAuth.getInstance();

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser user = firebaseAuth.getCurrentUser();
                if (user != null) {
                    // User is signed in
                    Log.d("account", "onAuthStateChanged:signed_in:" + user.getUid());
                } else {
                    // User is signed out
                    Log.d("account", "onAuthStateChanged:signed_out");
                }
                // ...
            }
        };
    }

    @Override
    public void onStart() {
        super.onStart();
        mAuth.addAuthStateListener(mAuthListener);
    }

    @Override
    public void onStop() {
        super.onStop();
        if (mAuthListener != null) {
            mAuth.removeAuthStateListener(mAuthListener);
        }
    }

    private void createAccount(String email, String password) {
        Log.d("account", "createAccount:" + email);
        if (!validateForm()) {
            return;
        }

        // [START create_user_with_email]
        mAuth.createUserWithEmailAndPassword(email, password)
                .addOnCompleteListener(this, new OnCompleteListener() {
                    @Override
                    public void onComplete(@NonNull Task task) {
                        Log.d("account", "createUserWithEmail: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()) {
                            Toast.makeText(RegisterActivity.this, R.string.register_failed,
                                    Toast.LENGTH_SHORT).show();
                        }

                        else {
                            Intent intent = new Intent(RegisterActivity.this, MainActivity.class);
                            RegisterActivity.this.startActivity(intent);
                            finish();
                        }
                    }
                });
        // [END create_user_with_email]
    }

    private boolean validateForm() {
        boolean valid = true;

        String email = mUsernameField.getText().toString();
        if (TextUtils.isEmpty(email)) {
            mUsernameField.setError("Required.");
            valid = false;
        } else {
            mUsernameField.setError(null);
        }

        String password = mPasswordField.getText().toString();
        if (TextUtils.isEmpty(password)) {
            mPasswordField.setError("Required.");
            valid = false;
        } else {
            mPasswordField.setError(null);
        }

        String confirmPassword = mConfirmPasswordField.getText().toString();
        if (TextUtils.isEmpty(confirmPassword)) {
            mConfirmPasswordField.setError("Required.");
            valid = false;
        } else {
            mConfirmPasswordField.setError(null);
        }

        if(!confirmPassword.equals(password)) {
            mConfirmPasswordField.setError("Passwords must be the same.");
            valid = false;
        }

        return valid;
    }

}

 

• 最后是错误:

W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
W/GooglePlayServicesUtil: Google Play Store is missing.
I/art: Background partial concurrent mark sweep GC freed 5866(313KB) AllocSpace objects, 1(14KB) LOS objects, 39% free, 2MB/4MB, paused 5.176ms total 27.761ms
D/account: createUserWithEmail:onComplete:false 

• 几乎所有内容都来自 Firebase 网站的教科书。请帮忙，我们已经坚持了几个小时，其他类似的问题都没有帮助。

最佳答案

选项 1:转到 Firebase Console < authentication="">< sign-in="" method，查看您是否在匿名状态下使用它。如果是，请禁用它并启用电子邮件/密码或您使用的任何登录方法。="">

选项 2:检查您用于测试的设备是否运行 Google Play 服务 9.0.0 或更高版本。

关于Android 身份验证 firebase 错误 : Local module descriptor class for com. 未找到 google.firebase.auth，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43422021/