无法找到显式活动类，您是否已在AndroidManifest.xml中声明了该活动？

Question

我正在使用android studio的android应用程序中使用服务，它在清单文件中自动对其进行了声明。但是，当我在主页上注册服务后运行应用程序时，登录后该应用程序将崩溃。

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.alqahtag.foodappclient">

<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">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".Login" />
    <activity android:name=".SignUp" />
    <activity
        android:name=".Home"
        android:label="@string/title_activity_home" />
    <activity android:name=".Cart" />
    <activity android:name=".FoodList" />
    <activity android:name=".FoodDetail" />
    <activity android:name=".OrderStatus" />

    <service
        android:name=".Service.$ListenOrder"
        android:enabled="true"
        android:exported="true"></service>
</application>

这是我的ListenOrder Java：

public class ListenOrder extends Service implements ChildEventListener {

FirebaseDatabase database;
DatabaseReference requests;

public ListenOrder() {
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onCreate() {
    super.onCreate();
    database = FirebaseDatabase.getInstance();
    requests = database.getReference("Requests");
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    requests.addChildEventListener(this);
    return super.onStartCommand(intent, flags, startId);
}

@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {

}

@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
    //trigger here
    Request request = dataSnapshot.getValue(Request.class);
    showNotification(dataSnapshot.getKey(), request);
}

private void showNotification(String key, Request request) {
    Intent intent = new Intent(getApplicationContext(), OrderStatus.class);
    intent.putExtra("userPhone", request.getPhone());
    PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext());

    builder.setAutoCancel(true)
            .setDefaults(Notification.DEFAULT_ALL)
            .setWhen(System.currentTimeMillis())
            .setTicker("Ghazwa")
            .setContentInfo("Your order was update")
            .setContentText("Order #" + key + " status is " + Common.convertCodeToStatus(request.getStatus()))
            .setContentIntent(contentIntent)
            .setContentInfo("Info")
            .setSmallIcon(R.mipmap.ic_launcher);

    NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(1, builder.build());
}

@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {

}

@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {

}

@Override
public void onCancelled( DatabaseError databaseError) {

}}

并且我在首页上注册了服务意图。这是我的主页：（注册服务的onCreate方法）

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setTitle("Menu");
    setSupportActionBar(toolbar);

    //Init Firebase
    database = FirebaseDatabase.getInstance();
    stores = database.getReference("Stores");

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent cartIntent = new Intent(Home.this, Cart.class);
            startActivity(cartIntent);
        }
    });

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open,
            R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

    //Set Name for User
    View headerView = navigationView.getHeaderView(0);
    textFullName = (TextView) headerView.findViewById(R.id.textFullName);
    textFullName.setText(Common.currentUser.getName());

    //Load menu
    recycler_menu = (RecyclerView) findViewById(R.id.recycler_menu);
    recycler_menu.setHasFixedSize(true);
    layoutManager = new LinearLayoutManager(this);
    recycler_menu.setLayoutManager(layoutManager);

    loadMenu();

    //Register Service
    Intent service = new Intent(Home.this, ListenOrder.class);
    startActivity(service);
}