Question

当我点击我的抽屉切换时，我得到以下异常

java.lang.IllegalArgumentException：没有发现重力的抽屉视图 LEFT

这是我的activity_drawer.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    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">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:minHeight="?attr/actionBarSize"
        android:background="?attr/colorPrimary"/>

    <FrameLayout
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <fragment
        android:id="@+id/navigation"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:name="com.xyz.ui.navigation.NavigationFragment"
        tools:layout="@layout/fragment_navigation" />

    </LinearLayout>
</android.support.v4.widget.DrawerLayout>

我的fragment_navigation.xml

<?xml version="1.0" encoding="utf-8"?>
<ListView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="start">

</ListView>

我的清单项目

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/navigation_item_text"
        android:layout_gravity="center_horizontal" />
</LinearLayout>

Answer 1

来自文档

要使用DrawerLayout，请将主要内容视图定位为第一个宽度和高度为match_parent的子视图。在主内容视图后添加抽屉作为子视图，并相应地设置layout_gravity。抽屉通常使用match_parent作为具有固定宽度的高度。

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    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">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:minHeight="?attr/actionBarSize"
        android:background="?attr/colorPrimary"/>

    <FrameLayout
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    </LinearLayout>

    <fragment
        android:id="@+id/navigation"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="right"
        android:name="com.xyz.ui.navigation.NavigationFragment"
        tools:layout="@layout/fragment_navigation" />

</android.support.v4.widget.DrawerLayout>

Answer 2

确定。让我在这里简单明了。
什么是DrawerLayout？ https://developer.android.com/reference/android/support/v4/widget/DrawerLayout.html

DrawerLayout 充当允许的窗口内容的顶级容器交互式“抽屉”视图从边缘拉出窗口。使用android:layout_gravity控制抽屉定位和布局子视图的属性对应于您视图的哪一侧希望抽屉出现：左或右。（或者开始/结束支持布局方向的平台版本。）使用 DrawerLayout，将您的主要内容视图定位为具有宽度的第一个子视图和match_parent的高度。在主内容视图后添加抽屉作为子视图并设置 layout_gravity恰当。抽屉通常使用match_parent作为具有固定宽度的高度。

什么是DrawerLayout ?,简单来说：

Android支持的布局，允许您在主屏幕上显示一个覆盖屏幕，称为抽屉。
DrawerLayout需要使用子视图，类似于LinearLayout和RelativeLayout。
子视图必须具有任何属性集
android:layout_gravity="start"或android:layout_gravity="left"
DrawerLayout使用此childView知道从哪里开始显示抽屉，即从左到右或从右到右剩下。有些国家/地区的文本从右到左阅读。

Techie Stuff：

EVENT＃1：ActionBarDrawerToggle.java被设置为DrawerLayout的抽屉监听器

    DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
    ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
                toolbar,R.string.navigation_drawer_open,
                R.string.navigation_drawer_close)
                mDrawerLayout.setDrawerListener(mDrawerToggle);

EVENT＃2：用户点击调用toggle()函数的Toolbar.navigationIcon
ActionBarDrawerToggle.java （android-sdk \ sources \ android-22 \ android \ support \ v7 \ app \ ActionBarDrawerToggle.java）

    private void toggle() { 
        if (mDrawerLayout.isDrawerVisible(GravityCompat.START)) {
            mDrawerLayout.closeDrawer(GravityCompat.START); 
        } else {
            mDrawerLayout.openDrawer(GravityCompat.START); 
        } 
    }

Gravity.java （android-sdk \ sources \ android-22 \ android \ view \ Gravity.java）

/** Push object to x-axis position at the start of its container,
    not changing its size.*/ 
    public static final int START = RELATIVE_LAYOUT_DIRECTION | Gravity.LEFT;

EVENT＃3：Toggle()函数调用mDrawerLayout.openDrawer(Gravity.START)
DrawerLayout.java （support-v4-22.1.1.jar库）

    /*** Open the specified drawer by animating it out of view. **
    @param gravity Gravity.LEFT to move the left drawer or Gravity.RIGHT
    for the right. * GravityCompat.START or GravityCompat.END may also
    be used. */ 
    public void openDrawer(@EdgeGravity int gravity) { 
        final View drawerView = findDrawerWithGravity(gravity); 
        if (drawerView == null) { 
            throw new IllegalArgumentException("No drawer view found with gravity " +
    gravityToString(gravity)); 
        }
        openDrawer(drawerView); 
    }

EVENT＃4：如果没有使用layout_gravity="start”或left设置DrawerLayout的childView，则会引发No drawer view found with gravity LEFT。

解决方案：

    <android.support.v4.widget.DrawerLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        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">
    <!--This will appear when the drawer is closed (default view)--> 
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"> 
        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:minHeight="?attr/actionBarSize"
            android:background="?attr/colorPrimary" /> 
    </LinearLayout> 
    <!-- This will appear when the drawer is opened -->
    <!-- the property,android:layout_gravity, is used internally to identify imageView as the view to be displayed when the drawer is opened -->
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height=" match_parent"
        android:layout_gravity="left"
        android:background="@drawable/img_shree_ganesha" /> 

    </android.support.v4.widget.DrawerLayout>
I hope that helps. Happy Coding…

Answer 3

“Android Drawer”需要是“DrawerLayout”的直接子节点。

在上面的示例中（re：原始问题示例），您只有一个直接子节点位于“DrawerLayout”（“LinearLayout”）下，没有抽屉视图。

将抽屉视图移出LinearLayout并将其放在其后面。

Answer 4

在我的情况下，因为DrawerLayout attr：tools:openDrawer="start" 我为第二个元素添加了android:layout_gravity="start"

 <android.support.v4.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"
    tools:openDrawer="right"
    tools:context=".map.MapFragment">

<include layout="@layout/fragment_map" />

<FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />


<android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="right"
        android:background="@color/white"
        android:fitsSystemWindows="true"
        app:menu="@menu/drawer_view"
        app:headerLayout="@layout/drawer_nav_header"/>

</android.support.v4.widget.DrawerLayout>

Answer 5

添加

android：layout_gravity =“ start”

到NavigationView

像这样

<com.google.android.material.navigation.NavigationView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:headerLayout="@layout/drawer_menu"
    android:layout_gravity="start"
    android:foregroundGravity="right"
    android:id="@+id/nv">

    <include layout="@layout/drawer_menu"/>
</com.google.android.material.navigation.NavigationView>

Answer 6

您是否使用从右到左（RTL）布局？将剩余重力设置在RTL布局上会引发此异常。可以通过设置重力开始而不是左侧来解决

Answer 7

您应该在DrawerLayout和NavigationView中使用相同的重力：例如：DrawerLayout标签中的tools：openDrawer =“ right”和NavigationView标签中的android：layout_gravity =“ right”

public function FPNL(){
    $session_data = $this->session->userdata('logged_in');
    $data['username'] = $session_data['username'];
    $query = $this->db->get('parmaster');    
    $data['PName']=$query->result_array();
    $data['query']=$this->User_model->viewAccMaster();
    $data['query1']=$this->User_model->viewAccMaster1();


    $first = $this->db->query('SELECT MIN(TAcNo) AS `first` FROM `tipup_payment` ORDER BY TAcNo DESC LIMIT 1')->row_array();

    $firstID = $this->db->query("SELECT * FROM `tipup_payment`  where TAcNo='$first[first]' ORDER BY TAcNo ASC")->result_array();

$last = $this->db->query('SELECT MAX(TAcNo) AS `last` FROM `tipup_payment` ORDER BY TAcNo DESC LIMIT 1')->row_array

$lastID = $this->db->query("SELECT * FROM `tipup_payment` where TAcNo='$last[last]'  ORDER BY TAcNo")->result_array();

if(!empty($id)){
        $result = $this->db->query("SELECT * FROM daybook WHERE recno = $id")->row_array();
    }else{
        $result = "";
    }

    $allData = $this->db->query("SELECT * FROM daybook ORDER BY recno ASC")->result_array();

        //$result = $resultQuery->result_array();

    if(!empty($id)){
        $data['currentID'] = $id;
    }else {
        $data['currentID'] = $first['first'];
    }
    $data['firstID'] = $first;
    $data['lastID'] = $last;
    $data['result'] = $result;
    $data['allData'] = $allData;

    $this->load->view('TipUp_Loan/Open_Payment_Entry', $data);

}

Answer 8

如果你仔细检查，你会发现确实有两个顶级元素：LinearLayout和fragment。

Answer 9

java.lang.IllegalArgumentException：找不到重力的抽屉视图LEFT

<强>解分配 layout_gravity =＆＃34; start＆＃34;或者＆＃34;左＆＃34; 属性到您的某个DrawerLayout子视图，如果您的抽屉布局已经有子视图。要么只需在DrawerLayout视图中创建一个子视图，然后给它一个 layout_gravity =＆＃34; start＆＃34;或＆＃34;左＆＃34; 属性。例如

 <?xml version="1.0" encoding="utf-8"?>
    <android.support.design.widget.CoordinatorLayout 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"
        android:id="@+id/mDrawer_Layout"
        tools:context="com.rad5.matdesign.MainActivity">

        <android.support.design.widget.CoordinatorLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <android.support.v4.widget.DrawerLayout
                android:id="@+id/drawer_layout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                tools:openDrawer="start">

    <!-- Notice that here an image view as a child of the Drawer layout was -->
    <!-- given a layout_gravity="start" -->

                <ImageView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_gravity="start"/>

            </android.support.v4.widget.DrawerLayout>

            <android.support.design.widget.AppBarLayout
                android:id="@+id/appBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    android:background="?attr/colorPrimary"/>

                <android.support.design.widget.TabLayout
                    android:id="@+id/tabs"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" />
            </android.support.design.widget.AppBarLayout>

            <android.support.v4.view.ViewPager
                android:id="@+id/viewpager"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_behavior="@string/appbar_scrolling_view_behavior" />

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

        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:headerLayout="@layout/nav_header"
            app:menu="@menu/menu_navigation_items" />

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

Answer 10

我这样解决了这个问题：

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"
    android:layoutDirection="rtl"
    tools:openDrawer="end"
    >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <include
            layout="@layout/toolbar_main"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <include layout="@layout/content_main" />

    </LinearLayout>

    <com.google.android.material.navigation.NavigationView
        android:id="@+id/navigationView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:layoutDirection="rtl"
        android:background="@color/white"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/menu_drawer" />

</androidx.drawerlayout.widget.DrawerLayout>

AND JAVA：

 if (mDrawerLayout != null && mDrawerLayout.isDrawerOpen(GravityCompat.END)) {
        mDrawerLayout.closeDrawer(GravityCompat.END);
    }

我希望这对某人有帮助！

Android DrawerLayout - 没有重力抽屉视图

10 个答案: