Android 单击导航抽屉中的菜单项后如何打开子菜单?

Android 单击导航抽屉中的菜单项后如何打开子菜单?,android,navigation-drawer,android-menu,Android,Navigation Drawer,Android Menu,我实现了一个带有导航视图的导航抽屉。我正在通过menu.xml文件在导航视图中添加值 <android.support.design.widget.NavigationView android:id="@+id/nvView" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="start" app:itemTextColor="@android:c

我实现了一个带有导航视图的导航抽屉。我正在通过menu.xml文件在导航视图中添加值

<android.support.design.widget.NavigationView
android:id="@+id/nvView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:itemTextColor="@android:color/white"
android:background="?attr/colorAccent"
app:menu="@menu/drawer_view"
app:headerLayout="@layout/nav_header"
>
</android.support.design.widget.NavigationView>

现在的问题是,用这种方式我不能点击菜单,只有子菜单可以点击这里


我想在这里显示子菜单,只在点击菜单后显示,否则子菜单会显示给其他人,或者说它处于不可见状态

我希望您应该使用侧导航抽屉中的自定义布局

以下是示例链接-

您还需要在侧导航抽屉中为您的场景实现可扩展列表视图,这是可扩展列表视图的示例


您需要将这两种功能结合起来,才能获得具有可扩展列表的导航抽屉。

最佳解决方案是在导航视图中具有可扩展列表视图。请参阅下面的代码 活动\导航\视图.xml

     <android.support.v4.widget.DrawerLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/drawer_layout"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:fitsSystemWindows="true">    
    <include layout="@layout/navigation_view_fragment_container"/>
    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_height="match_parent"
        android:layout_width="wrap_content"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/navigation_view_header">
    <ExpandableListView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        android:layout_marginTop="192dp"
        android:id="@+id/navigationmenu">
   </ExpandableListView>
   </android.support.design.widget.NavigationView>
   </android.support.v4.widget.DrawerLayout>

布局导航标题如下所示 导航\视图\标题.xml

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="192dp"
       android:background="#ff5722"
       android:padding="16dp"
       android:theme="@style/ThemeOverlay.AppCompat.Dark"
       android:orientation="vertical"
       android:gravity="bottom">
  <TextView
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:text="Username"
      android:textAppearance="@style/TextAppearance.AppCompat.Body1"/>
  </LinearLayout>

在导航视图活动中,为可展开列表视图设置适配器。 NavigationViewActivity.java

  public class NavigationViewActivity extends AppCompatActivity {
        private DrawerLayout mDrawerLayout;
        ExpandableListAdapter mMenuAdapter;
        ExpandableListView expandableList;
        List<ExpandedMenuModel> listDataHeader;
        HashMap<ExpandedMenuModel, List<String>> listDataChild;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_navigation_view);
    final ActionBar ab = getSupportActionBar();
    /* to set the menu icon image*/
    ab.setHomeAsUpIndicator(R.drawable.ic_menu);
    ab.setDisplayHomeAsUpEnabled(true);
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    expandableList= (ExpandableListView) findViewById(R.id.navigationmenu);
    NavigationView navigationView = (NavigationView)    findViewById(R.id.nav_view);

    if (navigationView != null) {
        setupDrawerContent(navigationView);
    }

    prepareListData();
    mMenuAdapter = new ExpandableListAdapter(this, listDataHeader,   listDataChild, expandableList);

    // setting list adapter
    expandableList.setAdapter(mMenuAdapter);
   }

    private void prepareListData() {
    listDataHeader = new ArrayList<String>();
    listDataChild = new HashMap<String, List<String>>();

    // Adding data header
    listDataHeader.add("heading1");
    listDataHeader.add("heading2");
    listDataHeader.add("heading3");

    // Adding child data
    List<String> heading1= new ArrayList<String>();
    heading1.add("Submenu of item 1");


    List<String> heading2= new ArrayList<String>();
    heading2.add("Submenu of item 2");
    heading2.add("Submenu of item 2");
    heading2.add("Submenu of item 2");


    listDataChild.put(listDataHeader.get(0), heading1);// Header, Child data
    listDataChild.put(listDataHeader.get(1), heading2);

   }
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            mDrawerLayout.openDrawer(GravityCompat.START);
            return true;
    }
    return super.onOptionsItemSelected(item);
}



private void setupDrawerContent(NavigationView navigationView) {
    navigationView.setNavigationItemSelectedListener(
            new NavigationView.OnNavigationItemSelectedListener() {
                @Override
                public boolean onNavigationItemSelected(MenuItem menuItem) {
                    menuItem.setChecked(true);
                    mDrawerLayout.closeDrawers();
                    return true;
                }
            });
}


@Override
public void onFragmentInteraction(Boolean isDataSaved) {

}
}
公共类NavigationViewActivity扩展了AppCompatActivity{
私人抽屉布局mDrawerLayout;
可扩展列表适配器;
可扩展列表查看可扩展列表;
列表列表数据头;
HashMapListDataChild;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u navigation\u视图);
最终ActionBar ab=getSupportActionBar();
/*设置菜单图标图像的步骤*/
ab.setHomeAsUpIndicator(R.drawable.ic_菜单);
ab.setDisplayHomeAsUpEnabled(真);
mDrawerLayout=(抽屉布局)findViewById(R.id.抽屉布局);
expandableList=(ExpandableListView)findViewById(R.id.navigationmenu);
NavigationView NavigationView=(NavigationView)findViewById(R.id.nav_视图);
if(navigationView!=null){
setupDrawerContent(导航视图);
}
prepareListData();
MMENUAAdapter=新的ExpandableListAdapter(此,listDataHeader,listDataChild,expandableList);
//设置列表适配器
expandableList.setAdapter(mMenuAdapter);
}
私有void prepareListData(){
listDataHeader=新的ArrayList();
listDataChild=newHashMap();
//添加数据头
listDataHeader.add(“heading1”);
listDataHeader.add(“heading2”);
listDataHeader.add(“heading3”);
//添加子数据
列表标题1=新的ArrayList();
标题1.添加(“第1项子菜单”);
列表标题2=新的ArrayList();
标题2.添加(“第2项子菜单”);
标题2.添加(“第2项子菜单”);
标题2.添加(“第2项子菜单”);
listDataChild.put(listDataHeader.get(0),heading1);//头,子数据
listDataChild.put(listDataHeader.get(1),heading2);
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
getMenuInflater().充气(R.menu.menu,menu);
返回true;
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
开关(item.getItemId()){
案例android.R.id.home:
mDrawerLayout.openDrawer(重力compat.START);
返回true;
}
返回super.onOptionsItemSelected(项目);
}
私有void setupDrawerContent(导航视图导航视图){
navigationView.setNavigationItemSelectedListener(
新建NavigationView.OnNavigationItemSelectedListener(){
@凌驾
公共布尔值onNavigationItemSelected(MenuItem MenuItem){
menuItem.setChecked(true);
mDrawerLayout.closeDrawers();
返回true;
}
});
}
@凌驾
公共void onFragmentInteraction(布尔值isDataSaved){
}
}
可扩展列表视图的适配器如下所示

   public class ExpandableListAdapter extends BaseExpandableListAdapter {
       private Context mContext;
       private List<String> mListDataHeader; // header titles

       // child data in format of header title, child title
       private HashMap<String, List<String>> mListDataChild;
       ExpandableListView  expandList;
   public ExpandableListAdapter(Context context, List<String> listDataHeader,HashMap<String, List<String>> listChildData,ExpandableListView mView) 
       {
         this.mContext = context;
         this.mListDataHeader = listDataHeader;
         this.mListDataChild = listChildData;
         this.expandList=mView;
       }

    @Override
     public int getGroupCount() {
       int i= mListDataHeader.size();
       Log.d("GROUPCOUNT",String.valueOf(i));
       return this.mListDataHeader.size();
      }

    @Override
     public int getChildrenCount(int groupPosition) {
     int childCount=0;
     if(groupPosition!=2) 
       {
 childCount=this.mListDataChild.get(this.mListDataHeader.get(groupPosition))
                .size();
       }
      return childCount;
       }

     @Override
      public Object getGroup(int groupPosition) {

      return this.mListDataHeader.get(groupPosition);
     }

    @Override
     public Object getChild(int groupPosition, int childPosition) {
   Log.d("CHILD",mListDataChild.get(this.mListDataHeader.get(groupPosition))
            .get(childPosition).toString());
    return this.mListDataChild.get(this.mListDataHeader.get(groupPosition))
            .get(childPosition);
    }

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

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

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

    @Override
     public View getGroupView(int groupPosition, boolean isExpanded, View   convertView, ViewGroup parent) {
       ExpandedMenuModel headerTitle = (ExpandedMenuModel) getGroup(groupPosition);
        if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this.mContext
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.listheader, null);
      }
       TextView lblListHeader = (TextView) convertView
            .findViewById(R.id.submenu);
       ImageView headerIcon=    (ImageView)convertView.findViewById(R.id.iconimage);
         lblListHeader.setTypeface(null, Typeface.BOLD);
         lblListHeader.setText(headerTitle.getIconName());
         headerIcon.setImageDrawable(headerTitle.getIconImg());
         return convertView;
     }

       @Override
        public View getChildView(int groupPosition, int childPosition,  boolean isLastChild, View convertView, ViewGroup parent) {
          final String childText = (String) getChild(groupPosition, childPosition);

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

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

      txtListChild.setText(childText);

      return convertView;
       }

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

      }
    <?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:padding="10dp"
      android:textColor="#000000"
      android:layout_marginLeft="20dp"
      android:textSize="18sp"
      android:id="@+id/submenu"/>
  </LinearLayout>
    <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="2dp"
     android:orientation="vertical"
     xmlns:android="http://schemas.android.com/apk/res/android" >

 <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="match_parent">
<ImageView
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:paddingBottom="10dp"
    android:paddingLeft="10dp"
    android:paddingTop="10dp"
    android:id="@+id/iconimage"/>
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:textColor="#000000"
    android:textSize="20sp"
    android:id="@+id/submenu"/>
</LinearLayout>

</LinearLayout>
公共类ExpandableListAdapter扩展了BaseExpandableListAdapter{
私有上下文;
私有列表mListDataHeader;//标题
//标题标题、子标题格式的子数据
私有HashMap mListDataChild;
可扩展列表视图可扩展列表;
公共ExpandableListAdapter(上下文上下文、列表listDataHeader、HashMap listChildData、ExpandableListView mView)
{
this.mContext=上下文;
this.mListDataHeader=listDataHeader;
this.mListDataChild=listChildData;
this.expandList=mView;
}
@凌驾
public int getGroupCount(){
int i=mListDataHeader.size();
Log.d(“GROUPCOUNT”,String.valueOf(i));
返回此.mListDataHeader.size();
}
@凌驾
公共整数getChildrenCount(整数组位置){
int childCount=0;
if(groupPosition!=2)
{
childCount=this.mListDataChild.get(this.mListDataHeader.get(groupPosition))
.size();
}
返回childCount;
}
@凌驾
公共对象getGroup(int-groupPosition){
返回此.mListDataHeader.get(groupPosition);
}
@凌驾
公共对象getChild(int-groupPosition,int-childPosition){
Log.d(“CHILD”,mListDataChild.get(this.mListDataHeader.get(groupPosition))
.get(childPosition.toString());
返回this.mListDataChild.get(this.mListDataHeader.get(groupPosition))
.get(儿童位置);
}
@凌驾
公共长getGroupId(int-groupPosition){
返回组位置;
}
@凌驾
公共长getChildId(int-groupPosition,int-childPosition){
返回子位置;
}
@凌驾
公共布尔表ID(){
返回false;
}
@凌驾
公共视图getGroupView(int groupPosition、布尔isExpanded、视图convertView、视图组父级){
ExpandedMenuModel headerTitle=(ExpandedMenuModel)getGroup(groupPosition);
if(convertView==null){
LayoutInflater infalInflater=(LayoutInf
    <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="2dp"
     android:orientation="vertical"
     xmlns:android="http://schemas.android.com/apk/res/android" >

 <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="match_parent">
<ImageView
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:paddingBottom="10dp"
    android:paddingLeft="10dp"
    android:paddingTop="10dp"
    android:id="@+id/iconimage"/>
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:textColor="#000000"
    android:textSize="20sp"
    android:id="@+id/submenu"/>
</LinearLayout>

</LinearLayout>