android - 如何在ListView中添加一个有四个选项的项目？

Question

我创建了包含一个问题和四个选项的数据库和表“TABLE_NAME”。
我的问题是如何在 ListView 中用选项显示这个问题。
我搜索了很多文章，但找不到一次添加 5 项的合适方法。
请提供一些引用或代码。
我正在尝试使用可扩展 ListView 。但它不显示问题，只显示
4个选项中的一个。
这是我的示例代码。

public class ObjectiveExamActivity extends ExpandableListActivity {

@SuppressWarnings("unchecked")
public void onCreate(Bundle savedInstanceState) {
    try{
         super.onCreate(savedInstanceState);
         setContentView(R.layout.displayobjectiveque);
         Intent intent=getIntent();
         setResult(RESULT_OK, intent);

    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("Error+++ " + e.getMessage());
    }
}

@SuppressWarnings("unchecked")
private List createGroupList() {
      ArrayList result = new ArrayList();
    final MySQLiteHelper m=new MySQLiteHelper(getBaseContext());
    final List<ObjectiveWiseQuestion> LocWiseProfile= m.getAllObjectiveQuestion();       

    for (final ObjectiveWiseQuestion cn : LocWiseProfile)
    {       
        HashMap m1=new HashMap();
        m1.put("Item","Option:"+cn.getQuestion());
        result.add(m1);         
    }
     /* 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()
{
    final MySQLiteHelper m=new MySQLiteHelper(getBaseContext());
    final List<ObjectiveWiseQuestion> LocWiseProfile= m.getAllObjectiveQuestion();  
    ArrayList result = new ArrayList();
    for (final ObjectiveWiseQuestion cn : LocWiseProfile)
    { // 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 < 4 ; n++ ) 
      {
        HashMap child = new HashMap();
        child.put( "Sub Item", "Sub Item " + m.getAllObjectiveQuestion() );
        child.put(cn.getOptionA(), cn.getOptionB());
        child.put("Option C", cn.getOptionC());
        child.put("Option D", cn.getOptionD());
        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 exapanding Listener => groupPosition = " + groupPosition);
    }catch(Exception e){
        System.out.println(" groupPosition Errrr +++ " + e.getMessage());
    }
}  

提前致谢。

Answer 1

Expandable ListView可以是你的作品。