导航抽屉图标在片段中不起作用

时间:2020-11-03 14:18:23

标签: android android-fragments navigation-drawer android-architecture-navigation

我正在尝试在一个特定的片段中实现导航抽屉,虽然显示了导航抽屉图标,但是当我单击它时,它无法打开或关闭导航抽屉。PS:导航抽屉可用于滑动。

我的代码如下:

该片段的XML布局

<?xml version="1.0" encoding="utf-8"?>

<androidx.drawerlayout.widget.DrawerLayout 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:id="@+id/drawerLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#7BC4CD"
    tools:context=".ui.ListFragment">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:itemCount="5"
            tools:listitem="@layout/user_item" />
  
    </androidx.constraintlayout.widget.ConstraintLayout>

    <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:menu="@menu/nav_drawer_menu" />
</androidx.drawerlayout.widget.DrawerLayout>

Fragment类的代码如下:

class ListFragment : Fragment(R.layout.fragment_list){

    lateinit var toggle:ActionBarDrawerToggle

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)


        toggle= ActionBarDrawerToggle(this.activity,drawerLayout, R.string.open, R.string.close)
        drawerLayout.addDrawerListener(toggle)
        toggle.syncState()
        (requireActivity() as MainActivity).supportActionBar?.setDisplayHomeAsUpEnabled(true)

        nav_view.setNavigationItemSelectedListener {
            when(it.itemId){
                R.id.menu_item_logout -> Navigation.findNavController(view).navigate(R.id.action_listFragment_to_registerFragment)
            }
            true
        }   
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        if(toggle.onOptionsItemSelected(item)){
            return true
        }
        return super.onOptionsItemSelected(item)
    }   

}

还要注意,我正在使用导航组件

任何帮助都会很棒

0 个答案:

没有答案