Question

class BottomNavigationDrawerFragment: BottomSheetDialogFragment() {

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
    return inflater.inflate(R.layout.fragment_bottomsheet, container, false)
}
override fun onActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)
    navigation_view.setNavigationItemSelectedListener { menuItem ->
        // Bottom Navigation Drawer menu item clicks
        when (menuItem!!.itemId) {
            R.id.nav1 -> context!!.toast("you clicked one")
            R.id.nav2 -> context!!.toast("you clicked two")
            R.id.nav3 -> context!!.toast("you clicked three")
        }
        true
    }


}

// This is an extension method for easy Toast call
fun Context.toast(message: CharSequence) {
    val toast = Toast.makeText(this, message, Toast.LENGTH_SHORT)
    toast.setGravity(Gravity.BOTTOM, 0, 600)
    toast.show()
}

}

我想要实现的是单击底部应用程序栏中的导航图标后，创建了一个模态底部工作表并在其中显示了一个导航抽屉。在上面的代码中，我在其中保留了三项。到这里一切都还可以，但是当要处理项目单击部分时，则行：

navigation_view.setNavigationItemSelectedListener { menuItem ->

显示错误。它告诉：

unresolved type:setNavigationItemSelectedListener

还有unresolved type in:menuItem

这里是fragment_bottomsheet.xml：

<android.support.design.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <com.google.android.material.navigation.NavigationView
        android:id="@+id/navigation_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:menu="@menu/bottom_nav_drawer_menu"/>

</android.support.design.widget.ConstraintLayout>

我在这里做什么错了？

Answer 1

问题似乎来自Context.toast(message: CharSequence)，您可以为此使用anko：

implementation "org.jetbrains.anko:anko:0.10.6"

无论如何，您可以通过以下方式检查输出：

Toast.makeText(context, "Clicked", Toast.LENGTH_LONG).show()

您会看到它会起作用。

更新：

尝试在BottomNavigationDrawerFragment中使用它：

 override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)

        navigation_view.setNavigationItemSelectedListener { menuItem ->
            // Bottom Navigation Drawer menu item clicks
            when (menuItem.itemId) {

                R.id.home ->{

                    Toast.makeText(context, "Clicked", Toast.LENGTH_LONG).show()
                }
//                R.id.nav1 -> context!!.toast(getString(R.string.nav1_clicked))
            }
            // Add code here to update the UI based on the item selected
            // For example, swap UI fragments here
            true
        }

        close_imageview.setOnClickListener {
            this.dismiss()
        }

        disableNavigationViewScrollbars(navigation_view)

    }

Answer 2

下面的方法对我有用。

const functions = require("firebase-functions");
const admin = require("firebase-admin");

admin.initializeApp();

exports.addAdmin = functions.https.onCall(async (data, context) => {
  const result = await checkIfUserWithEmailExists(data.email);
  if (result === true) {
    if (context.auth.token.admin !== true) {
      return {
        error: "Request not authorized. User must be an admin to fulfill"
      };
    }
    const email_1 = data.email;
    return grantAdminRole(email_1).then(() => {
      return {
        result: `Request fulfilled! ${email_1} is now an admin`
      };
    });
  } else {
    return {
      error: "No user with this email was found"
    };
  }
});

async function grantAdminRole(email_2) {
  // get user and add custom claim (admin)
  const user = await admin.auth().getUserByEmail(email_2);
  if (user.customClaims && user.customClaims.admin === true) {
    return;
  }
  return admin.auth().setCustomUserClaims(user.uid, {
    admin: true
  });
}

//Checks that the email passed in is an existing user
async function checkIfUserWithEmailExists(email) {
  const userCollectionRef = admin.firestore().collection("users");
  userCollectionRef
    .where("email", "==", email)
    .get()
    .then(querySnapshot => {
      if (querySnapshot.size === 1) {
        return true;
      } else {
        return false;
      }
    });
}

材料设计中的底纸抽屉

2 个答案: