有没有办法让 NavigationView 占用更少的代码（Kotlin）

Question

我在某种程度上被认为是（Kotlin 初学者）并且目前正在处理一项任务，而我的 NavDrawer 在每页中占用了太多 space。我已经准备好自己的 Header content 和 Menu Items，但是如果我想将它包含在每个页面中，它需要太多 space 并且每次编辑时都必须更新每个 drawer 内容会很费时间！有什么办法可以让我在一个地方存放我所有的 NavDarwer 代码，然后将它包含在其他页面中吗？感谢阅读并感谢任何建议

编辑-

导航代码：

<com.google.android.material.navigation.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header"
        app:itemIconTint="@color/colorPrimary"
        app:menu="@menu/nav_menu" />

导航的MainActivity中的代码：

override fun onNavigationItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            R.id.nav_latestAds -> {
                Toast.makeText(this, "You are currently here", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_cars -> {
                Toast.makeText(this, "Messages clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_properties -> {
                Toast.makeText(this, "Friends clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_mobiles -> {
                Toast.makeText(this, "Update clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_electDev -> {
                Toast.makeText(this, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_furniture -> {
                Toast.makeText(this, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_customerReg -> {
                Toast.makeText(this, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_vendorReg -> {
                val intent = Intent(this, RegisterVendor::class.java)
                startActivity(intent)
            }
            R.id.nav_logout -> {
                if (AuthService.isLoggedIn) {
                    UserDataService.logout()
                    Menu_userName.text = "User name"
                } else {
                    val loginIntent = Intent(this, Login::class.java)
                    startActivity(loginIntent)
                }
            }
        }
        drawerLayout.closeDrawer(GravityCompat.START)
        return true
    }

这里的问题是，如果我想在每个页面中添加 NavigationView，将需要大量代码 space。所以我想知道是否有任何方法可以创建一个快捷方式，将整个导航代码放在一个地方并将其传递给其他页面。

最新编辑-

package com.example.wasit

import android.content.Context
import android.content.Intent
import android.view.MenuItem
import android.widget.Toast
import androidx.core.content.ContextCompat.startActivity
import com.example.wasit.Model.Login
import com.example.wasit.Model.RegisterVendor
import com.example.wasit.Services.AuthService
import com.example.wasit.Services.UserDataService

class NavigationHandler (val context: Context,val menuItem: MenuItem){
    operator fun invoke() {
        when (item.itemId) {
            R.id.nav_latestAds -> {
                Toast.makeText(context, "You are currently here", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_cars -> {
                Toast.makeText(context, "Messages clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_properties -> {
                Toast.makeText(context, "Friends clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_mobiles -> {
                Toast.makeText(context, "Update clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_electDev -> {
                Toast.makeText(context, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_furniture -> {
                Toast.makeText(context, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_customerReg -> {
                Toast.makeText(context, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_vendorReg -> {
                val intent = Intent(context, RegisterVendor::class.java)
                startActivity(intent)
            }
            R.id.nav_logout -> {
                if (AuthService.isLoggedIn) {
                    UserDataService.logout()
                    Menu_userName.text = "User name"
                } else {
                    val loginIntent = Intent(context, Login::class.java)
                    startActivity(loginIntent)
                }
            }
        }
    }
}

Answer 1

将代码移到另一个 class 并只传递它需要的依赖项：

class NavigationHandler(val context: Context, val menuItem: MenuItem){
    operator fun invoke() {
        when (item.itemId) {
            R.id.nav_latestAds -> {
                Toast.makeText(this, "You are currently here", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_cars -> {
                Toast.makeText(this, "Messages clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_properties -> {
                Toast.makeText(this, "Friends clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_mobiles -> {
                Toast.makeText(this, "Update clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_electDev -> {
                Toast.makeText(this, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_furniture -> {
                Toast.makeText(this, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_customerReg -> {
                Toast.makeText(this, "Sign out clicked", Toast.LENGTH_SHORT).show()
            }
            R.id.nav_vendorReg -> {
                val intent = Intent(this, RegisterVendor::class.java)
                startActivity(intent)
            }
            R.id.nav_logout -> {
                if (AuthService.isLoggedIn) {
                    UserDataService.logout()
                    Menu_userName.text = "User name"
                } else {
                    val loginIntent = Intent(this, Login::class.java)
                    startActivity(loginIntent)
                }
            }
        }
    }
}

并这样称呼它：

override fun onNavigationItemSelected(item: MenuItem): Boolean {
    NavigationHandler(context, item)()
    drawerLayout.closeDrawer(GravityCompat.START)
    return true
}

有没有办法让 NavigationView 占用更少的代码（Kotlin）

is there a way of making NavigationView take less code (Kotlin)

kotlin

navigation-drawer