Android Studio Firebase身份验证（修复的Google Services版本）

Question

我遵循API文档来设置用户身份验证。 我的registerActivity正确地将数据发送到Firebase数据库，但是当我尝试为我的loginActivity设置登录身份验证时，登录按钮没有转到我期望的mainActivity 。 我的用户登录设置是否有问题，或者我应该对登录按钮使用intent？

public class LoginActivity extends AppCompatActivity  {

private EditText emailField;
private EditText passwordField;

private Button loginButton;

private FirebaseAuth loginAuth;
private FirebaseAuth.AuthStateListener loginAuthListener;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login3);

    loginAuth = FirebaseAuth.getInstance();

    emailField = (EditText) findViewById(R.id.emailField);
    passwordField = (EditText) findViewById(R.id.passwordField);
    loginButton = (Button) findViewById(R.id.loginButton);

    final TextView RegisterLink = (TextView) findViewById(R.id.registerLink);

    loginAuthListener = new FirebaseAuth.AuthStateListener(){
        @Override
        public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth){
            if(firebaseAuth.getCurrentUser() != null){
                startActivity(new Intent(LoginActivity.this, MainActivity.class));
            }
        }
    };

    RegisterLink.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent registerIntent = new Intent(LoginActivity.this, RegisterActivity.class);
            LoginActivity.this.startActivity(registerIntent);
        }
    });

    loginButton.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View view){
            startSignIn();
        }
    });
}

@Override
protected void onStart(){
    super.onStart();

    loginAuth.addAuthStateListener(loginAuthListener);
}



private void startSignIn(){
    String email = emailField.getText().toString();
    String password = passwordField.getText().toString();

    if(TextUtils.isEmpty(email) || TextUtils.isEmpty(password)){
        if(TextUtils.isEmpty(email)){
            Toast.makeText(LoginActivity.this, "Email Field is Empty", Toast.LENGTH_LONG).show();

        }else if(TextUtils.isEmpty(password)){
            Toast.makeText(LoginActivity.this, "Password Field is Empty", Toast.LENGTH_LONG).show();

        } else{
            Toast.makeText(LoginActivity.this, "Email Field and Password Field are Empty", Toast.LENGTH_LONG).show();
        }


    } else {

        loginAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if(!task.isSuccessful()){
                    Toast.makeText(LoginActivity.this,"Either the Password or Email Field is Incorrect. Please Try Again.", Toast.LENGTH_LONG).show();
                }
            }
        });
    }

}

}

Answer 1

我在运行应用程序时查看了日志控制台，发现模拟器运行的google服务版本不是最新的。 要解决此问题，您可以...

• 在真实的android设备上运行该应用
• 确保您使用的所有依赖项都使用相同版本（全部为9.8，全部为10.0.0，依此类推）
• 确保在您的Android工具列表中单击“与gradle文件同步项目”