layout_gravity="start" 在导航视图中不起作用

Question

layout_gravity attribute is not showing in Navigation View.I want to give the layout_gravity = "start" but it is not showing.

Here is my layout.xml file

<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:context=".HomeActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
    <androidx.appcompat.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="?android:attr/actionBarSize"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        android:elevation="@dimen/_4sdp"
        android:background="@color/colorPrimary">

    </androidx.appcompat.widget.Toolbar>
    </LinearLayout>

<com.google.android.material.navigation.NavigationView
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

Answer 1

If you want to see your Navigation View you must add tools:openDrawer:"start" in the DrawerLayout . This will set your Drawer as visible only in the layout editor, in the app it will be hidden until the user opens it.

Remember also to set the Gravity, the Menu and the Header Layout (if you have one) with

android:layout_gravity="start"
app:menu="@menu/your_menu"
app:headerLayout="@layout/your_header_layout"

in your NavigationView.

Hope it helps!

Answer 2

add this into drawer tools:openDrawer="start" and add this into navigation

   android:layout_gravity="start"

and don't forget to add the menu app:menu="@menu/menu"

Answer 3

Just copy and past the below code and adjust it and it will work

<com.google.android.material.navigation.NavigationView
        android:id="@+id/navigation"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start|left"
        app:headerLayout="@layout/header"
        app:menu="@menu/navigation_menu" />