안드로이드 확장 목록보기에서 단일 하위 선택을 허용하는 방법은 무엇입니까?

Question

나는 child.I와 함께 확장 가능한 목록보기를 사용하여 모든 parent.please에서 하나의 자식 선택을 설정하려고했는데 어떻게해야할지 모르겠다.

public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) { 
     final ChildViewHolder childViewHolder; 
     if(view==null) { 
      childViewHolder=new ChildViewHolder(); 
      view=((LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE)). 
        inflate(R.layout.product_listview_child_itemnew,null); 
      childViewHolder.choice1=(TextView)view.findViewById(R.id.textView1); 

      childViewHolder.choice1.setTextColor(Color.parseColor("#000000")); 

      childViewHolder.checkBox1=(CheckBox)view.findViewById(R.id.checkBox1); 
      //childViewHolder.checkBox1.setTag(getQuestion.get(i)); 
      view.setTag(childViewHolder); 


     } 
     else { 
      childViewHolder=(ChildViewHolder)view.getTag(); 
     } 
     childViewHolder.checkBox1.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       setquestion=getQuestion.get(i).getOptions().get(i1); 
       Log.d("vikisimp",":"+setquestion); 
      } 
     }); 

     childViewHolder.choice1.setText(getQuestion.get(i).getOptions().get(i1)); 
     return view; 
    } 

Answer 1

please find the solution of single selection in expandable listview below: 

ExpandableActivity.java 

public class ExpandableActivity extends AppCompatActivity { 

    private ExpandableListView expandableListView; 
    ArrayList<String> groupList = new ArrayList<String>(); 
    ArrayList<ArrayList<Answer>> childList = new ArrayList<ArrayList<Answer>>(); 

    ExpandableListAdapter expandableListAdapter; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_expandable); 

     expandableListView = (ExpandableListView)findViewById(R.id.expandableListView); 
     groupList.add("Question 1"); 
     groupList.add("Question 2"); 
     groupList.add("Question 3"); 
     groupList.add("Question 4"); 
     groupList.add("Question 5"); 

     ArrayList<Answer> answerList1 = new ArrayList<>(); 
     ArrayList<Answer> answerList2 = new ArrayList<>(); 
     ArrayList<Answer> answerList3 = new ArrayList<>(); 
     ArrayList<Answer> answerList4 = new ArrayList<>(); 
     ArrayList<Answer> answerList5 = new ArrayList<>(); 

     setData("Answer 1", 1, false, answerList1); 
     setData("Answer 2 ", 2, false, answerList1); 
     setData("Answer 3", 3, false, answerList1); 
     setData("Answer 4", 4, false, answerList1); 

     setData("Answer 1", 5, false, answerList2); 
     setData("Answer 2 ",6, false, answerList2); 
     setData("Answer 3", 7, false, answerList2); 
     setData("Answer 4", 8, false, answerList2); 

     setData("Answer 1", 9, false, answerList3); 
     setData("Answer 2 ",10, false, answerList3); 
     setData("Answer 3", 11, false, answerList3); 
     setData("Answer 4", 12, false, answerList3); 

     setData("Answer 1", 13, false, answerList4); 
     setData("Answer 2 ", 14, false, answerList4); 
     setData("Answer 3", 15, false, answerList4); 
     setData("Answer 4", 16, false, answerList4); 

     setData("Answer 1", 17, false, answerList5); 
     setData("Answer 2 ", 18, false, answerList5); 
     setData("Answer 3", 19, false, answerList5); 
     setData("Answer 4", 20, false, answerList5); 

     childList.add(answerList1); 
     childList.add(answerList2); 
     childList.add(answerList3); 
     childList.add(answerList4); 
     childList.add(answerList5); 

     expandableListAdapter = new ExpandableListAdapter(this,groupList,childList); 
     expandableListView.setAdapter(expandableListAdapter); 


     expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { 

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


       for(int i =0;i<childList.get(groupPosition).size();i++) 
       { 
        if(childPosition!=i) 
         childList.get(groupPosition).get(i).setState(false); 
       } 

       childList.get(groupPosition).get(childPosition).setState(!childList.get(groupPosition).get(childPosition).isState()); 


       expandableListAdapter.notifyDataSetChanged(); 
       return false; 
      } 
     }); 

    } 

    public void setData(String text, int id, boolean state, ArrayList<Answer> answerList) 
    { 
     Answer answer = new Answer(); 
     answer.setAnswer(text); 
     answer.setAnswerId(id); 
     answer.setState(state); 
     answerList.add(answer); 
    } 

} 

activity_expandable.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="match_parent" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:orientation="vertical"> 

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

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


ExpandableListAdapter.java 
public class ExpandableListAdapter extends BaseExpandableListAdapter { 

    private Context _context; 
    private ArrayList<String> groupItems; 
    ArrayList<ArrayList<Answer>> childItems = new ArrayList<ArrayList<Answer>>(); 

    public ExpandableListAdapter(Context context, ArrayList<String> groupItems, 
            ArrayList<ArrayList<Answer>> childItems) { 
     this._context = context; 
     this.groupItems = groupItems; 
     this.childItems = childItems; 
    } 

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

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

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

     final Answer answer = (Answer)getChild(groupPosition, childPosition); 

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

     TextView textViewChild = (TextView) convertView 
       .findViewById(R.id.textViewChild); 

     CheckBox checkBoxChild = (CheckBox)convertView.findViewById(R.id.checkBoxChild); 
     textViewChild.setText(answer.getAnswer()); 
     checkBoxChild.setChecked(answer.isState()); 



     return convertView; 
    } 

    @Override 
    public int getChildrenCount(int groupPosition) { 
     return childItems.get(groupPosition).size(); 
    } 

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

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

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

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

     TextView textViewGroup = (TextView) convertView 
       .findViewById(R.id.textViewGroup); 
     textViewGroup.setText(groupTitle); 
     ExpandableListView mExpandableListView = (ExpandableListView) parent; 
     mExpandableListView.expandGroup(groupPosition); 

     return convertView; 
    } 

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

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

labelgroup.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:padding="8dp" 
    android:background="@android:color/white"> 


    <TextView 
     android:id="@+id/textViewGroup" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft" 
     android:textSize="16sp" 
     android:textColor="@android:color/black" /> 

</LinearLayout> 

label_child.xml는

<?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="horizontal" 
    android:padding="8dp" 
    android:background="@android:color/white"> 


    <TextView 
     android:id="@+id/textViewChild" 
     android:layout_width="0dp" 
     android:layout_weight="1" 
     android:layout_height="wrap_content" 
     android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft" 
     android:textSize="16sp" 
     android:textColor="@android:color/holo_blue_dark" 
     android:text="Example"/> 

    <CheckBox 
     android:id="@+id/checkBoxChild" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:focusable="false" 
     android:focusableInTouchMode="false" 
     android:clickable="false"/> 

</LinearLayout>