データをエキスパンドリストビューにロード

Question

エキスパンドリストビューにデータをロードする方法を探しています。添付された画像に似ています。here これを動的に実行するには、 csvから読みますか？またはDBを作成するには？さらに、サブアイテムプレスでは、ScrollViewを表示します。 アクティビティのレイアウト：

<?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="wrap_content"> 

    <ExpandableListView 
     android:id= "@+id/android:list" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"/> 

     <TextView 
      android:id="@+id/android:empty" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      /> 
</LinearLayout> 

The itemlayout: 

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="horizontal" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 

    <TextView android:id="@+id/grp_child" 
     android:paddingLeft="50dp" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"/> 

</LinearLayout> 

そして、サブアイテム：ここ

は、これまでのコードである

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="horizontal" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 

    <TextView android:id="@+id/row_name" 
     android:paddingLeft="50dp" 
     android:focusable="false" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"/> 
</LinearLayout> 

活動で、私はいくつかを使用して、これまでにいくつかの値をハードコードされています私が見つけたチュートリアル：

public void onCreate(Bundle savedInstanceState) { 
     try{ 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_photographers); 

      SimpleExpandableListAdapter expListAdapter = 
        new SimpleExpandableListAdapter(
          this, 
          createGroupList(),    
          R.layout.group_row,    
          new String[] { "Group Item" }, 
          new int[] { R.id.row_name },  
          createChildList(),    
          R.layout.child_row,    
          new String[] {"Sub Item"},  
          new int[] { R.id.grp_child}  
        ); 
      setListAdapter(expListAdapter); 
     }catch(Exception e){ 
      System.out.println("Errrr +++ " + e.getMessage()); 
     } 
    } 

    /* Creating the Hashmap for the row */ 

    @SuppressWarnings("unchecked") 
    private List createGroupList() { 
     ArrayList result = new ArrayList(); 
     for(int i = 0 ; i < 15 ; ++i) { // 15 groups........ 
      HashMap m = new HashMap(); 
      m.put("Group Item","Group Item " + i); // the key and it's value. 
      result.add(m); 
     } 
     return (List)result; 
    } 

    @SuppressWarnings("unchecked") 
    private List createChildList() { 
     ArrayList result = new ArrayList(); 
     for(int i = 0 ; i < 15 ; ++i) { // this -15 is the number of groups(Here it's fifteen) 
      /* each group need each HashMap-Here for each group we have 3 subgroups */ 
      ArrayList secList = new ArrayList(); 
      for(int n = 0 ; n < 3 ; n++) { 
       HashMap child = new HashMap(); 
       child.put("Sub Item", "Sub Item " + n); 
       secList.add(child); 
      } 
      result.add(secList); 
     } 
     return result; 
    } 


    public void onContentChanged () { 
     System.out.println("onContentChanged"); 
     super.onContentChanged(); 
    } 

    /* This function is called on each child click */ 
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,int childPosition,long id) { 
     System.out.println("Inside onChildClick at groupPosition = " + groupPosition +" Child clicked at position " + childPosition); 
     return true; 
    } 


    /* This function is called on expansion of the group */ 
    public void onGroupExpand (int groupPosition) { 
     try{ 
      System.out.println("Group expanding Listener => groupPosition = " + groupPosition); 
     }catch(Exception e){ 
      System.out.println(" groupPosition Errrr +++ " + e.getMessage()); 
     } 
    } 

私はそれが良いアイデア表示するデータを別々のCSVファイルに保存します（1つはアイテムのデータを格納し、1つはサブアイテムのために1つのデータを格納します）。 1つはScrollViewの追加情報用です）、識別のためにid-sを持ち、OpenCSVReaderを使ってCSVから直接読み取ることができますか？

私は おかげ

Answer 1

はあなたの拡張可能なリストビュー用のアダプタを作成し、アドバイスの任意の部分をいただければ幸いです。その

public class ExpandableAdapter extends BaseExpandableListAdapter { 
    private final Context context; 
    private final List<Menu> parentObjects; 

    public ExpandableAdapter(Context context, ArrayList<Menu> parentObjects) { 
     this.context = context; 
     this.parentObjects = parentObjects; 

    } 

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

    @Override 
    public int getChildrenCount(int i) { 
     return parentObjects.get(i).childMenu.size(); 
    } 

    @Override 
    public Menu getGroup(int i) { 
     return parentObjects.get(i); 
    } 

    @Override 
    public Menu.ChildMenu getChild(int i, int i2) { 
     return parentObjects.get(i).childMenu.get(i2); 
    } 

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

    @Override 
    public long getChildId(int i, int i2) { 
     return 0; 
    } 

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

    @Override 
    public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) { 
     Menu currentParent = parentObjects.get(i); 
     if (view == null) { 
      LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context 
        .LAYOUT_INFLATER_SERVICE); 
      view = inflater.inflate(R.layout.navdrawer_parent_item, viewGroup,false); 
     } 

     ImageView imageViewIndicator = (ImageView) view.findViewById(R.id.imageViewNav); 
     if (getChildrenCount(i) == 0) 
      imageViewIndicator.setVisibility(View.GONE); 
     else 
      imageViewIndicator.setVisibility(View.VISIBLE); 

     TextView textViewNavMenuName = (TextView) view.findViewById(R.id.textViewNavParentMenuName); 
     ImageView imageViewIcon = (ImageView) view.findViewById(R.id.imageViewIcon); 
     String base64 = currentParent.getImage(); 
     if (base64 != null && !base64.equals("")) { 
      byte[] imageAsBytes = Base64.decode(currentParent.getImage().getBytes(), Base64 
        .DEFAULT); 
      imageViewIcon.setImageBitmap(BitmapFactory.decodeByteArray(imageAsBytes, 0, 
        imageAsBytes.length)); 

     } else 
      imageViewIcon.setImageResource(R.drawable.ic_action_android); 

     textViewNavMenuName.setText(currentParent.getMenuName()); 
     return view; 
    } 



    @Override 
    public View getChildView(int groupPosition, int childPosition, boolean b, View view, 
          ViewGroup viewGroup) { 
     Menu currentChild = getGroup(groupPosition); 
     if (view == null) { 
      LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context 
        .LAYOUT_INFLATER_SERVICE); 
      view = inflater.inflate(R.layout.navdrawer_child_item, viewGroup,false); 
     } 
     View divider = view.findViewById(R.id.divider); 
     if (b) 
      divider.setVisibility(View.VISIBLE); 
     else 
      divider.setVisibility(View.GONE); 

     TextView textViewNavMenuName = (TextView) view.findViewById(R.id.textViewNavChildMenuName); 
     textViewNavMenuName.setText(currentChild.childMenu.get(childPosition).getMenuName()); 

     return view; 
    } 

    @Override 
    public boolean isChildSelectable(int i, int i2) { 
     return true; 
    } 
} 

と

public class Menu { 
    private int AssociatedApp; 
    private String MenuName; 
    private String NavigateURL; 
    private String ActivityName; 
    private String Image; 
    private int MenuID; 
    public ArrayList<ChildMenu> childMenu; 

    public ArrayList<ChildMenu> getChildMenu() { 
     return childMenu; 
    } 

    public void setChildMenu(ArrayList<ChildMenu> childMenu) { 
     this.childMenu = childMenu; 
    } 

    public int getAssociatedApp() { 
     return AssociatedApp; 
    } 

    public void setAssociatedApp(int associatedApp) { 
     AssociatedApp = associatedApp; 
    } 

    public String getMenuName() { 
     return MenuName; 
    } 

    public void setMenuName(String menuName) { 
     MenuName = menuName; 
    } 

    public String getNavigateURL() { 
     return NavigateURL; 
    } 

    public void setNavigateURL(String navigateURL) { 
     NavigateURL = navigateURL; 
    } 

    public String getActivityName() { 
     return ActivityName; 
    } 

    public void setActivityName(String activityName) { 
     ActivityName = activityName; 
    } 

    public String getImage() { 
     return Image; 
    } 

    public void setImage(String image) { 
     Image = image; 
    } 


    public Menu() { 
    } 

    public int getMenuID() { 
     return MenuID; 
    } 

    public class ChildMenu { 
     private int AssociatedApp; 
     private String MenuName; 
     private String NavigateURL; 
     private String ActivityName; 
     private String Image; 
     private int MenuID; 
     public ChildMenu(String menuName, String activityName) { 
      this.MenuName = menuName; 
      this.ActivityName=activityName; 
     } 
     public ChildMenu() { 

     } 
     public int getAssociatedApp() { 
      return AssociatedApp; 
     } 

     public void setAssociatedApp(int associatedApp) { 
      AssociatedApp = associatedApp; 
     } 

     public String getMenuName() { 
      return MenuName; 
     } 

     public void setMenuName(String menuName) { 
      MenuName = menuName; 
     } 

     public String getNavigateURL() { 
      return NavigateURL; 
     } 

     public void setNavigateURL(String navigateURL) { 
      NavigateURL = navigateURL; 
     } 

     public String getActivityName() { 
      return ActivityName; 
     } 

     public void setActivityName(String activityName) { 
      ActivityName = activityName; 
     } 

     public String getImage() { 
      return Image; 
     } 

     public void setImage(String image) { 
      Image = image; 
     } 

     public int getMenuID() { 
      return MenuID; 
     } 
    } 

} 

あなたがデータを使用してメニューを作成することができます今すぐOKと拡張可能なリストビューbindwith

のような拡張可能なリストビューのためのモデルのような

elv = (ExpandableListView)findViewById(R.id.elv); 
     elv.setOnGroupExpandListener(onGroupExpandListenser); 
     MyExpandableAdapter adapter = new MyExpandableAdapter(this, getData());//where getData() will return list of data. 
     elv.setAdapter(adapter); 

親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"> 

    <RelativeLayout 
     android:layout_width="fill_parent" 
     android:layout_height="match_parent" 
     android:paddingBottom="12dp" 
     android:paddingLeft="12dp" 
     android:paddingTop="12dp"> 

     <ImageView 
      android:contentDescription="@string/app_name" 

      android:id="@+id/imageViewIcon" 
      android:layout_width="35dp" 
      android:layout_height="35dp" 
      android:layout_alignParentLeft="true" 
      android:layout_margin="4dp" 
      /> 

     <TextView 
      android:id="@+id/textViewNavParentMenuName" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_centerInParent="true" 
      android:layout_centerVertical="true" 
      android:layout_toLeftOf="@+id/imageViewNav" 
      android:layout_toRightOf="@+id/imageViewIcon" 
      android:padding="10dp" 
      android:textSize="15sp"/> 

     <ImageView 
      android:contentDescription="@string/app_name" 
      android:id="@+id/imageViewNav" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_margin="4dp" 
      android:src="@drawable/ic_action_more_nav" 
      /> 
    </RelativeLayout> 

    <include 
     layout="@layout/divider" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent"/> 
</LinearLayout> 

子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="wrap_content" 
       android:gravity="center_vertical" 

       android:orientation="vertical"> 

    <TextView 
     android:id="@+id/textViewNavChildMenuName" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginLeft="45dp" 
     android:gravity="center_vertical" 
     android:text="TextView" 
     android:padding="16dp"/> 

    <include 
     layout="@layout/divider" 
     android:layout_width="match_parent" 
     android:layout_height="fill_parent"/> 
</LinearLayout> 

このようなリスナーを追加すると、このようになります。 groupExpandlistenerは）のgetData（と結合するサンプルデータの使用のためにリスナー

elv.setOnChildClickListener(new DrawerItemClickListener()); 
     elv.setOnGroupClickListener(new DrawerItemClickListener()); 
     elv.setOnGroupExpandListener(new DrawerItemClickListener()); 

    private class DrawerItemClickListener implements ExpandableListView.OnChildClickListener, 
     ExpandableListView.OnGroupClickListener, ExpandableListView.OnGroupExpandListener { 
    @Override 
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int 
      childPosition, long id) { 
     selectItem(childPosition, navigationConfig.getBaseExpandableListAdapter 
       ().getChild 
       (groupPosition, childPosition)); 
     return true; 
    } 

    @Override 
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { 

     selectItem(groupPosition, navigationConfig.getBaseExpandableListAdapter 
       ().getGroup 
       (groupPosition)); 
     return false; 
    } 

    @Override 
    public void onGroupExpand(int groupPosition) { 
     if (lastExpandedPosition != -1 
       && groupPosition != lastExpandedPosition) { 
      expandableListView.collapseGroup(lastExpandedPosition); 
     } 
     lastExpandedPosition = groupPosition; 
    } 
} 

を設定するための開放1

private int lastExpandedPosition = -1; 

ながら、他のグループをcollaspingするために使用されます。 getData（）で指定されたモデルクラスのコンストラクタを作成します。

//Sample data for expandable list view. 
    public List<Menu> getData() 
    { 
     List<Menu> parentObjects = new ArrayList<Menu>(); 
     for (int i = 0; i<20; i++) 
     { 
      parentObjects.add(new Menu("Mother " +i, "Father " +i, "Header " + i, "Footer " +i, getChildren(i))); 

     } 
     return parentObjects; 
    } 

    private List<Menu.ChildMenu> getChildren(int childCount) 
    { 
     List<Menu.ChildMenu> childObjects = new ArrayList<Menu.ChildMenu>(); 
     for (int i =0; i<childCount; i++) 
     { 
      childObjects.add(new Menu.ChildMenu("Child " + (i+1), 10 +i)); 
     } 
     return childObjects; 
    }