java - 我的应用程序直接进入 MainActivity

Question

我正在创建一个像 WhatsApp 一样的应用程序，但我遇到了问题。该应用程序应该进入 LoginActivity，但它直接进入 MainActivity，而无需我登录。

我尝试更改 Android list 中的启动器场景，并且发生了同样的事情。我尝试在两个 loadingBar.dismiss(); 的末尾添加 mAuth.signOut(); 。我尝试改变这个SendUserToMainActivity(); 到此 SendUserToRegisterActivity();。我还删除了 firebase 数据库中的所有帐户。

登录 Activity :

private FirebaseUser currentUser;
private FirebaseAuth mAuth;
private ProgressDialog loadingBar;

private Button LoginButton, PhoneLoginButton;
private EditText UserEmail, UserPassword;
private TextView NeedNewAccountLink, ForgetPasswordLink;

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

    mAuth = FirebaseAuth.getInstance();
    currentUser = mAuth.getCurrentUser();

    InitializeFields();

    NeedNewAccountLink.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            SendUserToRegisterActivity();

        }
    });


    LoginButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            AllowUserToLogin();

        }
    });


}

private void AllowUserToLogin() {

    String email = UserEmail.getText().toString();
    String password = UserPassword.getText().toString();

    if(TextUtils.isEmpty(email)){

        Toast.makeText(this, "Please enter your email", Toast.LENGTH_SHORT).show();
    }

    if(TextUtils.isEmpty(password)){

        Toast.makeText(this, "Please enter your password", Toast.LENGTH_SHORT).show();
    }
    else{

        loadingBar.setTitle("Logging In");
        loadingBar.setMessage("Please wait...");
        loadingBar.setCanceledOnTouchOutside(true);
        loadingBar.show();

        mAuth.signInWithEmailAndPassword(email, password)
                .addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {

                        if(task.isSuccessful())
                        {
                            SendUserToMainActivity();
                            Toast.makeText(LoginActivity.this, "Logged in successfully", Toast.LENGTH_SHORT).show();
                            loadingBar.dismiss();
                        }

                            else{

                                String message = task.getException().toString();
                                Toast.makeText(LoginActivity.this, "Error:" + message, Toast.LENGTH_SHORT).show();
                                loadingBar.dismiss();

                            }
                    }
                });

    }

}

private void InitializeFields() {

    LoginButton = (Button) findViewById(R.id.login_button);
    PhoneLoginButton = (Button) findViewById(R.id.phone_login_button);
    UserEmail = (EditText) findViewById(R.id.login_email);
    UserPassword = (EditText) findViewById(R.id.login_password);
    NeedNewAccountLink = (TextView) findViewById(R.id.need_new_account_link);
    ForgetPasswordLink = (TextView) findViewById(R.id.forget_password_link);
    loadingBar = new ProgressDialog(this);

}

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

    if (currentUser != null){

        SendUserToMainActivity();

    }
}

private void SendUserToMainActivity() {

        Intent loginIntent = new Intent(LoginActivity.this, MainActivity.class);
        startActivity(loginIntent);
    }

private void SendUserToRegisterActivity() {

    Intent registerIntent = new Intent(LoginActivity.this, RegisterActivity.class);
    startActivity(registerIntent);
}

AndroidManifest:

   <application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme"
    tools:ignore="GoogleAppIndexingWarning">
    <activity android:name=".RegisterActivity" />
    <activity android:name=".LoginActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".MainActivity"/>
</application>

Answer 1

清除应用程序的缓存一次，将启动器从主 Activity 更改为登录 Activity 重新构建应用程序，并在登录 Activity 的启动时让用户登录，这就是为什么他总是将您发送到主 Activity ，
如果您已删除 Firebase 中的所有用户，您将获得身份验证，直到您清除缓存。
尝试此解决方案，并告诉我它是否适合您。