侧面导航抽屉项目单击不起作用，尽管导航抽屉可见并打开

Question

我正在尝试实现导航抽屉，但是当我运行应用程序并单击抽屉中的项目时，它只是关闭抽屉而不显示吐司。 当我单击要导航的项目时，我的抽屉没有任何反应，即导航抽屉内的内容不可单击，即菜单。

以下是我的导航抽屉代码：

活动主力.xml

<?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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/content_menu"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<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_menu"/>
<LinearLayout 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"
tools:context=".FirstMain"
android:orientation="vertical"
android:gravity="center">
<TextView
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginBottom="40dp"
android:background="@color/back"
android:fontFamily="@font/berkshire_swash"
android:gravity="center"
android:text="@string/app_name"
android:textAlignment="center"
android:textColor="@color/txt"
android:textSize="50sp"
android:textStyle="bold" />
<Button
android:id="@+id/button"
android:layout_width="165dp"
android:layout_height="wrap_content"
android:layout_margin="30sp"
android:background="@color/back"
android:fontFamily="@font/berkshire_swash"
android:gravity="center_horizontal"
android:padding="10sp"
android:text="PLAY"
android:textColor="@color/txt"
android:textSize="35sp"
android:textStyle="bold" />
</LinearLayout>
</androidx.drawerlayout.widget.DrawerLayout>

nav_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="@+id/nav_rule"
android:icon="@drawable/rules"
android:title="Rules" />
<item
android:id="@+id/nav_about"
android:icon="@drawable/about"
android:title="About"/>
</group>
</menu>

Content_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/puzzle">
</LinearLayout>
</LinearLayout>

Main.kt

class FirstMain : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener{
lateinit var btn : Button
lateinit var toolbar: Toolbar
lateinit var drawerLayout: DrawerLayout
lateinit var navView: NavigationView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_first_main)
btn = findViewById(R.id.button)
toolbar = findViewById(R.id.toolbar)
setSupportActionBar(toolbar)
drawerLayout = findViewById(R.id.drawer_layout)
navView = findViewById(R.id.nav_view)
val toggle = ActionBarDrawerToggle(
this, drawerLayout, toolbar, 0, 0
)
drawerLayout.addDrawerListener(toggle)
toggle.syncState()
btn.setOnClickListener {
val intent = Intent(this, MainActivity::class.java)
startActivity(intent)
}
navView.setNavigationItemSelectedListener(this)
}
override fun onNavigationItemSelected(p0: MenuItem): Boolean {
p0.isChecked = true
when (p0.itemId) {
R.id.nav_rule -> {
Toast.makeText(this, "Profile clicked", Toast.LENGTH_LONG).show()
}
R.id.nav_about -> {
Toast.makeText(this, "Messages clicked", Toast.LENGTH_LONG).show()
}
}
drawerLayout.closeDrawer(GravityCompat.START)
return true
}
}

Answer 1

你的代码看起来都不错，奇怪的是它不起作用，但你可以尝试添加

navView.bringToFront();
navView.setNavigationItemSelectedListener(this)