无法找到明确的活动类。 在 AndroidManifest.xml 中

Question

Iam trying to implement firebase into my app but when I click on register or login in this error pops up. From what I can see all my pages are linked in the Mainifest.xml

Unable to find explicit activity class {edu.itsligo.gaa_app/com.google.firebase.firestore.auth.User}; have you declared this activity in your AndroidManifest.xml?

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.itsligo.gaa_app">

    <uses-permission android:name="android.permission.INTERNET" />

    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <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/Theme.GAAapp">
        <activity
            android:name=".User"
            android:theme="@style/AppTheme.NoActionBar"/>
        <activity android:name=".Admin" />
        <activity android:name=".Login" />
        <activity android:name=".Register" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

Java class (after click on login or register)

public class User extends AppCompatActivity {

    private DrawerLayout draw;
    TextView email,username;
    FirebaseAuth fAuth;
    FirebaseFirestore fStore;

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

        draw = findViewById(R.id.drawer_layout);
        // framnet for profile
        NavigationView navigationView = findViewById(R.id.nav_view);

//        email = findViewById(R.id.emailPlacehold);
//        username = findViewById(R.id.usernamePlacehold);
//
//        fAuth = FirebaseAuth.getInstance();
//        fStore = FirebaseFirestore.getInstance();
//
//
//
//        DocumentReference docRef = fStore.collection("Users").document(fAuth.getCurrentUser().getUid());
//        docRef.get().addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
//            @Override
//            public void onSuccess(DocumentSnapshot documentSnapshot) {
//                if(documentSnapshot.exists()){
//                    username.setText(documentSnapshot.getString("FullName"));
//                    email.setText(documentSnapshot.getString("UserEmail"));
//                }
//            }
//        });


        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()){
                    case R.id.nav_Account:
                        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                                new ProfileFragment()).commit();
                        break;
                    case  R.id.nav_Games:
                        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                                new GamesFragment()).commit();

                        break;
                    default:

                }
                draw.closeDrawer(GravityCompat.START);
                return true;
            }
        });

        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, draw, toolbar,
                R.string.nav_app_bar_open_drawer_description, R.string.navigation_drawer_close);
        draw.addDrawerListener(toggle);
        toggle.syncState();

        if(savedInstanceState == null){
            getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,
                    new ProfileFragment()).commit();
            navigationView.setCheckedItem(R.id.nav_Account);
        }
    }




    @Override
    public void onBackPressed() {
        if (draw.isDrawerOpen(GravityCompat.START)) {
            draw.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    public void logoutUser(View view) {
        FirebaseAuth.getInstance().signOut();
        startActivity(new Intent(getApplicationContext(), Login.class));
        finish();
    }
}

Answer 1

I think you might import the wrong User class. Check the import statement that you use to import the User class and change its package from Firebase 's to yours. It should be import edu.itsligo.gaa_app.User in your case.