如何在ListView中添加一个带有四个选项的项目？

Question

我创建了包含一个问题和4个选项的数据库和表“TABLE_NAME”。
我的问题是如何使用listview中的选项显示此问题。
我搜索很多文章，但无法找到适当的方法一次添加5个项目。
请给我一些参考或代码。
我想使用可扩展列表视图。但它不显示问题并仅显示
从4选项中的一个选项。
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()); 
    } 
} 

}

在此先感谢。

Answer 1

我真的不肯定的是，你需要的，但尝试这个例子应用程序：

布局：

<!-- list_item_multiselect.xml --> 
<?xml version="1.0" encoding="utf-8"?> 
<CheckBox xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/variant" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:text="Variant" /> 
<!-- main.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="fill_parent" 
    android:orientation="vertical" > 

    <ListView 
     android:id="@+id/listView1" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" > 
    </ListView> 

</LinearLayout> 

活动：

public class Option_listActivity extends Activity { 

    private static final String TITLE = "var_title"; 

    private ListView mListView; 

    private Map<String, String> createVariant(String text) 
    { 
     Map<String, String> res = new HashMap<String, String>(); 
     res.put(TITLE, text); 
     return res; 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     mListView = (ListView)findViewById(R.id.listView1); 

     List<Map<String, String>> variants = new ArrayList<Map<String, String>>(); 
     variants.add(createVariant("Option 1")); 
     variants.add(createVariant("Option 2")); 
     variants.add(createVariant("Option 3")); 
     variants.add(createVariant("Option 4")); 

     TextView header = new TextView(this); 
     header.setText("Choose variant:"); 
     mListView.addHeaderView(header); 

     Button footer = new Button(this); 
     footer.setText("Check"); 
     footer.setOnClickListener(okayButtonListener); 
     mListView.addFooterView(footer); 

     mListView.setAdapter(new SimpleAdapter(this, variants, R.layout.list_item_multiselect, new String[] {TITLE}, new int[] {R.id.variant})); 


    } 

    private OnClickListener okayButtonListener = new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      int count = mListView.getCount() - mListView.getHeaderViewsCount() - mListView.getFooterViewsCount(); 
      String result = ""; 
      for (int i = 0; i < count; i++) 
      { 
       CheckBox cb = (CheckBox)mListView.getChildAt(i + 1); 
       if (cb.isChecked()) 
       { 
        result += "Option " + (i + 1) + " checked\n"; 
       } 
      } 
      Toast.makeText(Option_listActivity.this, result, Toast.LENGTH_LONG).show(); 
     } 

    }; 
} 

如果您只需要1个变型可选，你需要做一些升级

Answer 2

Expandable ListView可以是你的工作。