默认导航抽屉视图到ExpandableListView [英] Default Navigation Drawer View to ExpandableListView

查看：162 发布时间：2018/11/29 18:55:39 java android expandablelistview navigationview android-navigationview

本文介绍了默认导航抽屉视图到ExpandableListView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

在Android Studio 2.1.2中，如果我创建默认导航活动，我会看到此视图：

使用以下 activity_main.xml 文件：

 <？xml version =1.0encoding =utf-8？> 
< 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
 android：fitsSystemWindows =true
工具：openDrawer =start> 
 
< include 
 layout =@ layout / app_bar_main
 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 =start
 android：fitsSystemWindows =true
 app：headerLayout =@ layout / nav_header_main
 app：menu = @ menu / activity_main_drawer/> 
 
< /android.support.v4.widget.DrawerLayout>

正如您所见< android.support.design.widget.NavigationView /> 使用 app：menu =@ menu / activity_main_drawer显示 activity_main_drawer.xml中定义的菜单列表文件如下：

 <？xml version =1.0encoding =utf-8 >？; 
< menu xmlns：android =http://schemas.android.com/apk/res/android> 
 
< group android：checkableBehavior =single> 
< item 
 android：id =@ + id / nav_camera
 android：icon =@ drawable / ic_menu_camera
 android：title =Import/> 
< item 
 android：id =@ + id / nav_gallery
 android：icon =@ drawable / ic_menu_gallery
 android：title =Gallery/> 
< item 
 android：id =@ + id / nav_slideshow
 android：icon =@ drawable / ic_menu_slideshow
 android：title =Slideshow/> 
< item 
 android：id =@ + id / nav_manage
 android：icon =@ drawable / ic_menu_manage
 android：title =Tools/> 
< / group> 
 
< item android：title =Communicate> 
< menu> 
< item 
 android：id =@ + id / nav_share
 android：icon =@ drawable / ic_menu_share
 android：title =Share/> 
< item 
 android：id =@ + id / nav_send
 android：icon =@ drawable / ic_menu_send
 android：title =Send/> 
< / menu> 
< / item> 
 
< / menu>

现在我的计划是替换 activity_main_drawer.xml中定义的菜单列表而是使用 ExpandableListView 。因为我希望我的菜单项具有子类别，例如，菜单项 Cars 将具有柴油的子类别，汽油和混合等我做过研究，似乎没有人有我需要的确切工作解决方案。

我看了这里：

我目前的做法是创建一个新布局 ex_list ，如下所示：

 <？xml version =1.0encoding =utf-8？> 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：orientation =verticalandroid：layout_width =match_parent
机器人：layout_height = match_parent > 
< android.support.v4.widget.DrawerLayout 
 android：id =@ + id / drawer_layout
 android：layout_width =match_parent
 android：layout_height = match_parent> 
< ExpandableListView 
 android：id =@ + id / lvExp
 android：layout_height =match_parent
 android：layout_width =match_parent/> 
 
< /android.support.v4.widget.DrawerLayout> 
< / LinearLayout>

并编辑 activity_main.xml 到

 <？xml version =1.0encoding =utf-8？> 
< 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
 android：fitsSystemWindows =true
工具：openDrawer =start> 
 
< include 
 layout =@ layout / app_bar_main
 android：layout_width =match_parent
 android：layout_height =match_parent/> 
 
< android.support.design.widget.NavigationView 
 android：id =@ + id / nav_view
 android：layout_width =240dp
 android ：layout_gravity =start
 android：layout_height =match_parent
 
 android：fitsSystemWindows =true
 app：headerLayout =@ layout / nav_header_main> 
< include 
 layout =@ layout / ex_list
 android：layout_height =wrap_content
 android：layout_width =match_parent/> 
 
< /android.support.design.widget.NavigationView> 
 
 
< /android.support.v4.widget.DrawerLayout>

以下布局产生以下结果：

和错误信息

  java.lang.IllegalArgumentException：必须使用MeasureSpec.EXACTLY测量DrawerLayout。 
在android.support.v4.widget.DrawerLayout.onMeasure（DrawerLayout.java:1036）
在android.view.View.measure（View.java:18788）
在android.view .ViewGroup.measureChildWithMargins（ViewGroup.java:5951）
在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1465）
在android.widget.LinearLayout.measureVertical（LinearLayout.java:748）
在android.widget.LinearLayout.onMeasure（LinearLayout.java:630）
在android.view.View.measure（View.java:1 8788）
在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5951）
在android.widget.FrameLayout.onMeasure（FrameLayout.java:194）
在android.support.design .widget.NavigationView.onMeasure（NavigationView.java:223）
在android.view.View.measure（View.java:18788）
在android.support.v4.widget.DrawerLayout.onMeasure（DrawerLayout） .java：1104）
在android.view.View.measure（View.java:18788）
在android.view.ViewGroup.measureChildWithMargins（ViewGro） up.java:5951）
在android.widget.FrameLayout.onMeasure（FrameLayout.java:194）
在android.support.v7.widget.ContentFrameLayout.onMeasure（ContentFrameLayout.java:135）
在android.view.View.measure（View.java:18788）
在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5951）
在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout） .java：1465）
在android.widget.LinearLayout.measureVertical（LinearLayout.java:748）
在android.widget .LinearLayout.onMeasure（LinearLayout.java:630）
在android.view.View.measure（View.java:18788）
在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5951）
在android.widget.FrameLayout.onMeasure（FrameLayout.java:194）
在android.view.View.measure（View.java:18788）
在android.view.ViewGroup.measureChildWithMargins（ ViewGroup.java:5951）
在android.widget.LinearLayout.measureChildBeforeLayout（LinearLayout.java:1465）
在android.widget.Linear Layout.measureVertical（LinearLayout.java:748）
在android.widget.LinearLayout.onMeasure（LinearLayout.java:630）
在android.view.View.measure（View.java:18788）
在android.view.ViewGroup.measureChildWithMargins（ViewGroup.java:5951）
在android.widget.FrameLayout.onMeasure（FrameLayout.java:194）
 at com.android.internal.policy.PhoneWindow $ DecorView.onMeasure（PhoneWindow.java:2643）
在android.view.View.measure（View.java:18788）
在android.view.ViewRootIm pl.performMeasure（ViewRootImpl.java:2100）
 at android.view.ViewRootImpl.measureHierarchy（ViewRootImpl.java:1216) 
 at android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1452)
在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1107）
在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6013）
在android.view.Choreographer $ CallbackRecord .run（Choreographer.java:858）
在android.view.Choreographer.doCallbacks（Choreographer.java:670）
在android.view.Choreographer.doFrame（Choreographer.java:606）
在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:844）
在android.os.Handler.handleCallback（Handler） .java：739）
在android.os.Handler.dispatchMessage（Handler.java:95）
在android.os.Looper.loop（Looper.java:148）
在android。 app.ActivityThread.main（ActivityThread.java:5417）
 at java.lang.reflect.Method.invoke（Native Method）
 at com.android.interna l.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）
 at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616)

我做错了什么？

答案：

谢谢@Moulesh !!!

解决方案

这是可扩展列表适配器的代码：

  public class ExpandListAdapter扩展BaseExpandableListAdapter {
 private Context _context; 
 private List< String> _listDataHeader; //标题标题
 //标题标题，子标题格式的子数据
 private HashMap< String，List< String>> _listDataChild; 
 
 public ExpandListAdapter（上下文上下文，List< String> listDataHeader，
 HashMap< String，List< String>> listChildData）{
 this._context = context; 
 this._listDataHeader = listDataHeader; 
 this._listDataChild = listChildData; 
} 
 
 @Override 
 public Object getChild（int groupPosition，int childPosititon）{
 return this._listDataChild.get（this._listDataHeader.get（groupPosition）） 
 .get（childPosititon）; 
} 
 
 @Override 
 public long getChildId（int groupPosition，int childPosition）{
 return childPosition; 
} 
 
 @Override 
 public View getChildView（int groupPosition，final int childPosition，
 boolean isLastChild，View convertView，ViewGroup parent）{
 
 final String childText =（String）getChild（groupPosition，childPosition）; 
 
 if（convertView == null）{
 LayoutInflater infalInflater =（LayoutInflater）this._context 
 .getSystemService（Context.LAYOUT_INFLATER_SERVICE）; 
 convertView = infalInflater.inflate（R.layout.list_item，null）; 
} 
 
 TextView txtListChild =（TextView）convertView 
 .findViewById（R.id.lblListItem）; 
 
 txtListChild.setText（childText）; 
 return convertView; 
} 
 
 @Override 
 public int getChildrenCount（int groupPosition）{
 return this._listDataChild.get（this._listDataHeader.get（groupPosition））
 .size（）; 
} 
 
 @Override 
 public Object getGroup（int groupPosition）{
 return this._listDataHeader.get（groupPosition）; 
} 
 
 @Override 
 public int getGroupCount（）{
 return this._listDataHeader.size（）; 
} 
 
 @Override 
 public long getGroupId（int groupPosition）{
 return groupPosition; 
} 
 
 @Override 
 public View getGroupView（int groupPosition，boolean isExpanded，
查看convertView，ViewGroup parent）{
 String headerTitle =（String） getGroup（groupPosition）; 
 if（convertView == null）{
 LayoutInflater infalInflater =（LayoutInflater）this._context 
 .getSystemService（Context.LAYOUT_INFLATER_SERVICE）; 
 convertView = infalInflater.inflate（R.layout.list_group，null）; 
} 
 
 TextView lblListHeader =（TextView）convertView 
 .findViewById（R.id.lblListHeader）; 
 lblListHeader.setTypeface（null，Typeface.BOLD）; 
 lblListHeader.setText（headerTitle）; 
 
 return convertView; 
} 
 
 @Override 
 public boolean hasStableIds（）{
 return false; 
} 
 
 @Override 
 public boolean isChildSelectable（int groupPosition，int childPosition）{
 return true; 
}}

在您的活动中：

  private void enableExpandableList（）{
 listDataHeader = new ArrayList< String>（）; 
 listDataChild = new HashMap< String，List< String>>（）; 
 expListView =（ExpandableListView）findViewById（R.id.left_drawer）; 
 
 prepareListData（listDataHeader，listDataChild）; 
 listAdapter = new ExpandListAdapter（this，listDataHeader，listDataChild）; 
 //设置列表适配器
 expListView.setAdapter（listAdapter）; 
 
 expListView.setOnGroupClickListener（new ExpandableListView.OnGroupClickListener（）{
 
 @Override 
 public boolean onGroupClick（ExpandableListView parent，View v，
 int groupPosition， long id）{
 // Toast.makeText（getApplicationContext（），
 //Group Clicked+ listDataHeader.get（groupPosition），
 // Toast.LENGTH_SHORT）.show（） ; 
返回false; 
} 
}）; 
 // Listview组扩展监听器
 expListView.setOnGroupExpandListener（new ExpandableListView.OnGroupExpandListener（）{
 
 @Override 
 public void onGroupExpand（int groupPosition）{
 Toast.makeText（getApplicationContext（），
 listDataHeader.get（groupPosition）+Expanded，
 Toast.LENGTH_SHORT）。show（）; 
} 
}）; 
 
 // Listview组collasped listener 
 expListView.setOnGroupCollapseListener（new ExpandableListView.OnGroupCollapseListener（）{
 
 @Override 
 public void onGroupCollapse（int groupPosition） {
 Toast.makeText（getApplicationContext（），
 listDataHeader.get（groupPosition）+Collapsed，
 Toast.LENGTH_SHORT）。show（）; 
 
} 
}）; 
 
 //子视图监听器上的Listview 
 expListView.setOnChildClickListener（new ExpandableListView.OnChildClickListener（）{
 
 @Override 
 public boolean onChildClick（ExpandableListView parent ，查看v，
 int groupPosition，int childPosition，long id）{
 // TODO自动生成方法存根
 //临时代码：
 
 //直到这里
 Toast.makeText（
 getApplicationContext（），
 listDataHeader.get（groupPosition）
 +：
 + listDataChild.get（
 listDataHeader。 get（groupPosition））。get（
 childPosition），Toast.LENGTH_SHORT）
 .show（）; 
返回false; 
} 
}）;}

使用dat创建List的方法a：

  private void prepareListData（List< String> listDataHeader，Map< String，
 List< String>> listDataChild）{
 
 
 //添加子数据
 listDataHeader.add（Product1）; 
 listDataHeader.add（product2）; 
 listDataHeader.add（Product3）; 
 
 //添加子数据
 List< String> top = new ArrayList< String>（）; 
 top.add（x1）; 
 top.add（x2）; 
 top.add（x3）; 
 top.add（x4）; 
 top.add（x5）; 
 
 
 List< String> mid = new ArrayList< String>（）; 
 mid.add（y1）; 
 mid.add（y2）; 
 mid.add（y3）; 
 
 List< String> bottom = new ArrayList< String>（）; 
 bottom.add（z1）; 
 bottom.add（z2）; 
 bottom.add（z3）; 
 
 
 
 listDataChild.put（listDataHeader.get（0），top）; //标题，子数据
 listDataChild.put（listDataHeader.get（1），mid）; 
 listDataChild.put（listDataHeader.get（2），bottom）; 
}

布局xml中的此代码

 <？xml version =1.0encoding =utf-8？> 
< 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
 android：fitsSystemWindows =true
工具：openDrawer =start> 
 
< include 
 android：id =@ + id / act_bar
 layout =@ layout / app_bar_main
 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 =start
 android：fitsSystemWindows =true
 app：headerLayout =@ layout / nav_header_main> 
<！ -  app：menu =@ menu / activity_main_drawer - > 
 
< ExpandableListView 
 android：id =@ + id / left_drawer
 android：layout_width =match_parent
 android：layout_height =wrap_content
 android：layout_marginTop =@ dimen / nav_header_height
 android：background =@ color / Background
 android：dividerHeight =0dp/> 
 
< /android.support.design.widget.NavigationView> 
< /android.support.v4.widget.DrawerLayout>

xml for ExplistHeader list_group.xml

 <？xml version =1.0encoding =utf-8？> 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：layout_width =fill_parent
 android：layout_height =wrap_content 
 android：orientation =vertical
 android：paddingTop =10dp
 android：padding =30dp
 android：background =@ color / Background> 
 
< TextView 
 android：id =@ + id / lblListHeader
 android：layout_width =fill_parent
 android：layout_height =wrap_content
 android：paddingLeft =？
 android：attr / expandableListPreferredItemPaddingLeft
 android：textSize =17dp
 android：textColor =@ color / colorTextPrimary/> 
< / LinearLayout>

xml for Explistchild list_item.xml

 <？xml version =1.0encoding =utf-8？> 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：layout_width =match_parent
 android：layout_height =55dip 
 android：background =@ color / Background
 android：orientation =vertical> 
 
< TextView 
 android：id =@ + id / lblListItem
 android：layout_width =fill_parent
 android：layout_height =wrap_content
 android：textSize =17dip
 android：paddingTop =5dp
 android：paddingBottom =5dp
 android：paddingLeft =？
 android：attr / expandableListPreferredChildPaddingLeft /> 
< / LinearLayout>

In Android Studio 2.1.2, if i create a default navigation activity I get this view:

Which uses the following activity_main.xml file:

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_main"
        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="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

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

As you can see <android.support.design.widget.NavigationView/> uses app:menu="@menu/activity_main_drawer" for displaying list of menu defined in activity_main_drawer.xml file as follows:

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

    <group android:checkableBehavior="single">
        <item
            android:id="@+id/nav_camera"
            android:icon="@drawable/ic_menu_camera"
            android:title="Import" />
        <item
            android:id="@+id/nav_gallery"
            android:icon="@drawable/ic_menu_gallery"
            android:title="Gallery" />
        <item
            android:id="@+id/nav_slideshow"
            android:icon="@drawable/ic_menu_slideshow"
            android:title="Slideshow" />
        <item
            android:id="@+id/nav_manage"
            android:icon="@drawable/ic_menu_manage"
            android:title="Tools" />
    </group>

    <item android:title="Communicate">
        <menu>
            <item
                android:id="@+id/nav_share"
                android:icon="@drawable/ic_menu_share"
                android:title="Share" />
            <item
                android:id="@+id/nav_send"
                android:icon="@drawable/ic_menu_send"
                android:title="Send" />
        </menu>
    </item>

</menu>

Now my plan is to replace this menu list defined in activity_main_drawer.xml and instead use an ExpandableListView. Because I want my menu items to have subcategories, for example, menu item Cars will have sub category of Diesel, Petrol and Hybrid etc. I have done research and it appears no one has the exact working solution I need.

I looked here:

and the subsequent links mentioned there.

N.B: The links above mentions the use of ListView in navigation drawer which is no longer the case as Android Studio achieves this by using menu item using activity_main_drawer.xml.

Can someone please provide me an working example of this? To re-iterate, I want an expandable list view inside the default navigation drawer activity. Ive gathered that I'll need XML files and java class codes to get me the foundation I need to get started.

Thanks in advance. :)

EDIT: Final look mockup (excuse my photoshop skills)

My current approach is to create a new layout ex_list as follows:

<?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">
    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
       <ExpandableListView
            android:id="@+id/lvExp"
            android:layout_height="match_parent"
            android:layout_width="match_parent"/>

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

and edit activity_main.xml to

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

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

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="240dp"
        android:layout_gravity = "start"
        android:layout_height="match_parent"

        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main">
        <include
            layout="@layout/ex_list"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"/>

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


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

Which results to following layout:

and error message of

                                                                      java.lang.IllegalArgumentException: DrawerLayout must be measured with MeasureSpec.EXACTLY.
                                                                          at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1036)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
                                                                          at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
                                                                          at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
                                                                          at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
                                                                          at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
                                                                          at android.support.design.widget.NavigationView.onMeasure(NavigationView.java:223)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1104)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
                                                                          at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
                                                                          at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
                                                                          at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
                                                                          at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
                                                                          at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
                                                                          at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
                                                                          at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
                                                                          at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
                                                                          at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
                                                                          at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
                                                                          at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)
                                                                          at android.view.View.measure(View.java:18788)
                                                                          at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2100)
                                                                          at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1216)
                                                                          at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1452)
                                                                          at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
                                                                          at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
                                                                          at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
                                                                          at android.view.Choreographer.doCallbacks(Choreographer.java:670)
                                                                          at android.view.Choreographer.doFrame(Choreographer.java:606)
                                                                          at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
                                                                          at android.os.Handler.handleCallback(Handler.java:739)
                                                                          at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                          at android.os.Looper.loop(Looper.java:148)
                                                                          at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                          at java.lang.reflect.Method.invoke(Native Method)
                                                                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

What am I doing wrong?

ANSWER:

Thanks @Moulesh !!!

解决方案

This is the code for expandable list adapter:

public class ExpandListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;

public ExpandListAdapter(Context context, List<String> listDataHeader,
                         HashMap<String, List<String>> listChildData) {
    this._context = context;
    this._listDataHeader = listDataHeader;
    this._listDataChild = listChildData;
}

@Override
public Object getChild(int groupPosition, int childPosititon) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .get(childPosititon);
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
}

@Override
public View getChildView(int groupPosition, final int childPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) {

    final String childText = (String) getChild(groupPosition, childPosition);

    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_item, null);
    }

    TextView txtListChild = (TextView) convertView
            .findViewById(R.id.lblListItem);

    txtListChild.setText(childText);
    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .size();
}

@Override
public Object getGroup(int groupPosition) {
    return this._listDataHeader.get(groupPosition);
}

@Override
public int getGroupCount() {
    return this._listDataHeader.size();
}

@Override
public long getGroupId(int groupPosition) {
    return groupPosition;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {
    String headerTitle = (String) getGroup(groupPosition);
    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_group, null);
    }

    TextView lblListHeader = (TextView) convertView
            .findViewById(R.id.lblListHeader);
    lblListHeader.setTypeface(null, Typeface.BOLD);
    lblListHeader.setText(headerTitle);

    return convertView;
}

@Override
public boolean hasStableIds() {
    return false;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}}

In your activity:

     private void enableExpandableList() {
      listDataHeader = new ArrayList<String>();
      listDataChild = new HashMap<String, List<String>>();
    expListView = (ExpandableListView) findViewById(R.id.left_drawer);

    prepareListData(listDataHeader, listDataChild);
    listAdapter = new ExpandListAdapter(this, listDataHeader, listDataChild);
    // setting list adapter
    expListView.setAdapter(listAdapter);

    expListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

        @Override
        public boolean onGroupClick(ExpandableListView parent, View v,
                                    int groupPosition, long id) {
            // Toast.makeText(getApplicationContext(),
            // "Group Clicked " + listDataHeader.get(groupPosition),
            // Toast.LENGTH_SHORT).show();
            return false;
        }
    });
    // Listview Group expanded listener
    expListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {

        @Override
        public void onGroupExpand(int groupPosition) {
            Toast.makeText(getApplicationContext(),
                    listDataHeader.get(groupPosition) + " Expanded",
                    Toast.LENGTH_SHORT).show();
        }
    });

    // Listview Group collasped listener
    expListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {

        @Override
        public void onGroupCollapse(int groupPosition) {
            Toast.makeText(getApplicationContext(),
                    listDataHeader.get(groupPosition) + " Collapsed",
                    Toast.LENGTH_SHORT).show();

        }
    });

    // Listview on child click listener
    expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

        @Override
        public boolean onChildClick(ExpandableListView parent, View v,
                                    int groupPosition, int childPosition, long id) {
            // TODO Auto-generated method stub
            // Temporary code:

            // till here
            Toast.makeText(
                    getApplicationContext(),
                    listDataHeader.get(groupPosition)
                            + " : "
                            + listDataChild.get(
                            listDataHeader.get(groupPosition)).get(
                            childPosition), Toast.LENGTH_SHORT)
                    .show();
            return false;
        }
    });}

Method to create List with data:

   private void prepareListData(List<String> listDataHeader, Map<String,
  List<String>> listDataChild) {


    // Adding child data
    listDataHeader.add("Product1");
    listDataHeader.add("product2");
    listDataHeader.add("Product3");

    // Adding child data
    List<String> top = new ArrayList<String>();
    top.add("x1");
    top.add("x2");
    top.add("x3");
    top.add("x4");
    top.add("x5");


    List<String> mid = new ArrayList<String>();
    mid.add("y1");
    mid.add("y2");
    mid.add("y3");

    List<String> bottom = new ArrayList<String>();
    bottom.add("z1");
    bottom.add("z2");
    bottom.add("z3");



    listDataChild.put(listDataHeader.get(0), top); // Header, Child data
    listDataChild.put(listDataHeader.get(1), mid);
    listDataChild.put(listDataHeader.get(2), bottom);
}

this code in layout xml

<?xml version="1.0" encoding="utf-8"?>
    <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"
     android:fitsSystemWindows="true"
     tools:openDrawer="start">

<include
    android:id="@+id/act_bar"
    layout="@layout/app_bar_main"
    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="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main">
    <!--app:menu="@menu/activity_main_drawer"-->

    <ExpandableListView
        android:id="@+id/left_drawer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/nav_header_height"
        android:background="@color/Background"
        android:dividerHeight="0dp" />

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

xml for ExplistHeader list_group.xml

    <?xml version="1.0" encoding="utf-8"?>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingTop="10dp"
        android:padding="30dp"
        android:background="@color/Background">

        <TextView
            android:id="@+id/lblListHeader"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:paddingLeft="?
            android:attr/expandableListPreferredItemPaddingLeft"
            android:textSize="17dp"
            android:textColor="@color/colorTextPrimary" />    
        </LinearLayout>

xml for Explistchild list_item.xml

    <?xml version="1.0" encoding="utf-8"?>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="55dip"
        android:background="@color/Background"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/lblListItem"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:textSize="17dip"
            android:paddingTop="5dp"
            android:paddingBottom="5dp"
            android:paddingLeft="?
            android:attr/expandableListPreferredChildPaddingLeft" />
        </LinearLayout>

这篇关于默认导航抽屉视图到ExpandableListView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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默认导航抽屉视图到ExpandableListView [英] Default Navigation Drawer View to ExpandableListView

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默认导航抽屉视图到ExpandableListView [英] Default Navigation Drawer View to ExpandableListView

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