Question

我有一个可扩展的ListView，每个父视图都有一个子视图。在子视图中，我有一个子子元素：EditText，TextView和RadioButton。

在输入

后，子元素具有不同的值onclick radiobutton和edittext值

enter image description here

CategoryActivity.java

   package com.restaurant.app;

    public class CategoryActivity extends Activity implements OnClickListener {


    public static final String TAG_TITLE = "title";
    public static final String TAG_PRICE="price";
    private static final String TAG_CATEGORY="category";
    private static final String TAG_DETAIL="detail";
    private static final String TAG_MENU="menu";
    private static final String TAG_ID="id";
    private static final String TAG_NOME="nome";
    private static final String TAG_HOTELID="hotel_id";
    private static final String TAG_DESCRIPTION="description";
    private static final String TAG_SERVICES="services";
    private static final String TAG_URLID="urlid";
    private static final String TAG_RESTAURANTID="restaurant_id";
    private static final String TAG_USERID="user_id";
    private static final String TAG_OFFERTA="offerta";
    private static final String TAG_PREZZO="prezzo";


    ArrayList<String> resultparent = new ArrayList<String>();
    ArrayList<Object> resultchild = new ArrayList<Object>();
    ArrayList<HashMap<String,String>> child = new ArrayList<HashMap<String,String>>();


    // for childlist item
    ArrayList<ArrayList<HashMap<String, String>>> childlist = new ArrayList<ArrayList<HashMap<String,String>>>();

    ImageView imagehome;
    ImageView imagemenu;
    ImageView imagebooking;
    ImageView imageordernow;
    ExpandableListView expandablelistview;
    CategoryList categoryadapter;   
    SimpleExpandableListAdapter adapter;


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

        imagehome=(ImageView)findViewById(R.id.imagehome);
        imagehome.setOnClickListener(this);

        imagemenu=(ImageView)findViewById(R.id.imagemenu);
        imagemenu.setOnClickListener(this);

        imageordernow=(ImageView)findViewById(R.id.imageordernow);
        imageordernow.setOnClickListener(this);

        expandablelistview = (ExpandableListView)findViewById(R.id.expandablelistview);    


        new CategoryAsynctask().execute("");

    }

    public class CategoryAsynctask extends AsyncTask<String,String,ArrayList<String>> 
    {
        @Override
        protected ArrayList<String> doInBackground(String... arg0)
        {

            JsonParser jparser = new JsonParser();
            String url="http://cssthemeclub.com/demo/saffron/webservices/categorymenu.php?restid=5";
            String data=jparser.getJSONFromUrl(url);


            try
            {
                JSONObject jobject=new JSONObject(data);                
                JSONArray jcategory=jobject.getJSONArray(TAG_CATEGORY);

                Log.e("Category length","--->"+jcategory.length());

                for (int i=0;i<jcategory.length();i++)
                {   

                    JSONObject jdetail=jcategory.getJSONObject(i).getJSONObject(TAG_DETAIL);

                    String categoryid=jdetail.get(TAG_ID).toString();
                    String nome=jdetail.get(TAG_NOME).toString();
                    String restaurantid=jdetail.get(TAG_RESTAURANTID).toString();
                    resultparent.add(nome);

                    JSONArray jmenu = new JSONArray();
                    jmenu=null;
                    jmenu=jcategory.getJSONObject(i).getJSONArray(TAG_MENU);

                    //Log.e("Jmenu","--->"+jmenu);

                    child=new ArrayList<HashMap<String,String>>();
                    child.clear();

                    for(int j=0;j<jmenu.length();j++)
                    {                           
                            String menuid=jmenu.getJSONObject(j).getString(TAG_ID).toString();
                            String offer=jmenu.getJSONObject(j).getString(TAG_OFFERTA).toString();
                            String price=jmenu.getJSONObject(j).getString(TAG_PREZZO).toString();

                            //Log.e("menu","--->"+offer);
                            //Log.e("price","-->"+price);

                            HashMap<String, String> map = new HashMap<String, String>();

                            map.put(TAG_MENU,menuid);
                            map.put(TAG_PREZZO,price);
                            map.put(TAG_OFFERTA,offer);
                            map.put(TAG_RESTAURANTID,restaurantid);

                            child.add(map);
                            childlist.add(child);

                    }
                    resultchild.add(child);

                }
                Log.e("Result Child","--->"+resultchild);

            }
            catch (Exception e) 
            {

            }

            return resultparent;
        }

        @Override
        protected void onPostExecute(ArrayList<String> result)
        {   
            super.onPostExecute(result);

            categoryadapter= new CategoryList(resultparent,resultchild);
            categoryadapter.setInflater((LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE),CategoryActivity.this);
            expandablelistview.setAdapter(categoryadapter);

    }   
 }
        @Override
        public void onClick(View v) 
        {
            switch (v.getId())
            {
                case R.id.imagehome     : Intent home = new Intent(CategoryActivity.this,HomeActivity.class);
                                          startActivity(home);
                                          break;

                case R.id.imagemenu     : Intent menu = new Intent(CategoryActivity.this,MenuActivity.class);
                                          startActivity(menu);  
                                          break;

                case R.id.imageordernow : Intent ordernow= new Intent(CategoryActivity.this,OrderDetailActivity.class);
                                          startActivity(ordernow); 
                                          break;

                default                 :   
                                          break;
            }
        }

    }

类别List.java

public class CategoryList extends BaseExpandableListAdapter
{   
    private static final String TAG_OFFERTA="offerta";
    private static final String TAG_PREZZO="prezzo";
    private static final String TAG_RESTAURANTID="restaurant_id";
    private static final String TAG_MENU="menu";
    private static final String TAG_ID="id";
    public Activity activity;
    public ArrayList<String> resultparent;
    public ArrayList<HashMap<String,String>> tempchild; 
    public ArrayList<Object> resultchild=new ArrayList<Object>();
    ArrayList<HashMap<String,String>> childlist = new ArrayList<HashMap<String,String>>();
    public LayoutInflater inflater = null;


    String id;
    String qty;
    String title;   
    String menuid;  
    String sessionid;
    String restorantid;
    String price;



    public CategoryList(ArrayList<String> grouplist,ArrayList<Object> childItem)
    {   
          resultparent=grouplist;
          this.resultchild = childItem;
    }

    public void setInflater(LayoutInflater mInflater, Activity act)
    {   
          this.inflater = mInflater;
          activity = act;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) 
    {   

        return null;
    }   

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

        return 0;
    }

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

          tempchild = (ArrayList<HashMap<String,String>>)resultchild.get(groupPosition); 

          TextView textprice,textmenutitle;
          final EditText editqty;

          RadioGroup radiogroupchilli;
          RadioGroup radiogroupoil;

          final ImageView imagechilli;
          final ImageView imagechillitwo;

          final ImageView imageoil;
          final ImageView imagechiz;


         // RadioButton radiochillion,radiochillioff,radiooil,radiochiz;

          if(convertView == null)
          {  
              convertView = inflater.inflate(R.layout.redlistchild,null);
          }


          radiogroupchilli=(RadioGroup)convertView.findViewById(R.id.radiogroupchilli);
          radiogroupoil=(RadioGroup)convertView.findViewById(R.id.radiogroupoil);

          imagechilli=(ImageView)convertView.findViewById(R.id.imagechilli);
          imagechillitwo=(ImageView)convertView.findViewById(R.id.imagechillitwo);

          imageoil=(ImageView)convertView.findViewById(R.id.imageoil);
          imagechiz=(ImageView)convertView.findViewById(R.id.imagechiz);

          textprice=(TextView)convertView.findViewById(R.id.textprice);
          textprice.setText(tempchild.get(childPosition).get(TAG_PREZZO).toString());

          textmenutitle=(TextView)convertView.findViewById(R.id.textmenutitle);
          textmenutitle.setText(tempchild.get(childPosition).get(TAG_OFFERTA).toString());

          editqty=(EditText)convertView.findViewById(R.id.editqty);       

          convertView.setTag(childPosition);

          radiogroupchilli.setOnCheckedChangeListener(new OnCheckedChangeListener()
          {

                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId)
                {
                    switch(checkedId)
                    {
                        case R.id.radiochillion  : 
                                                   imagechillitwo.setImageResource(R.drawable.chilitwooff);
                                                   imagechilli.setImageResource(R.drawable.chilion);
                                                   break;

                        case R.id.radiochillioff : 
                                                   imagechillitwo.setImageResource(R.drawable.chilitwoon);
                                                   imagechilli.setImageResource(R.drawable.chilioff);
                                                   break;
                    }
                }

           });

          radiogroupoil.setOnCheckedChangeListener(new OnCheckedChangeListener()
          {

                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId)
                {
                    switch(checkedId)
                    {
                        case R.id.radiooil  : 
                                              imageoil.setImageResource(R.drawable.oilon);
                                              imagechiz.setImageResource(R.drawable.chiijoff);
                                              break;

                        case R.id.radiochiz : 
                                              imageoil.setImageResource(R.drawable.oiloff);
                                              imagechiz.setImageResource(R.drawable.chijion);   
                                              break; 
                    }
                }

           });

          return convertView;

  }

    @Override
    public int getChildrenCount(int groupPosition)
    {   

        return ((ArrayList<String>)resultchild.get(groupPosition)).size();

    }

    @Override
    public Object getGroup(int groupPosition) 
    {

        return resultparent.get(groupPosition);
    }


    @Override
    public int getGroupCount()
    {

        return resultparent.size();
    }



    @Override
    public long getGroupId(int groupPosition) 
    {

        return 0;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
    {   
         TextView texttitle;
         final LinearLayout nonvegtitlelistlayout;

         if(convertView == null)
         { 
             convertView = inflater.inflate(R.layout.redlistgroup, null);
         }

         nonvegtitlelistlayout=(LinearLayout)convertView.findViewById(R.id.nonvegtitlelistlayout);
         texttitle=(TextView)convertView.findViewById(R.id.texttitle);
         texttitle.setText(resultparent.get(groupPosition));

        return convertView;
    }


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

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

     @Override
     public void onGroupCollapsed(int groupPosition)
     {
        super.onGroupCollapsed(groupPosition);
     }

     @Override
     public void onGroupExpanded(int groupPosition) 
     {
         super.onGroupExpanded(groupPosition);
     }

}

Answer 1

而不是直接访问视图（通过迭代ViewGroup的子项，这甚至不会按预期工作，因为ExpandableListView会回收它的视图以及ListView所做的事情，你应该把输入的数据存储到某种模型中。

换句话说，当您在列表中显示数据时，它应该由一些信息支持（在最简单的情况下为String[]）。因此，您的任务是使用某些特定类来支持显示的数据，这些类将保存您需要的信息。例如，您可以将其命名为Option。

然后，当您在EditText中修改数据时，将输入的文本保存到与Option的当前位置对应的ExpandableListView实例中。当您需要检索输入的信息时，您只需遍历您保存的每个Option。

Answer 2

我不完全确定你要做什么，但你可以尝试让每个ViewGroup的孩子都这样：

for(int x = 0; x < viewGroup.getChildCount(); x++) {
    final View v = viewGroup.getChildAt(x);
    if(v instanceof EditText) {
        //do logic
    }
    else if(v instanceof RadioButton) {
        //do logic
    }
}

请记住，ViewGroup对象将是包含所有这些视图的任何对象（LinearLayout等），因此您需要首先获得对它的引用。

当我点击可展开的子元素时，如何获取编辑框和单选按钮的每个值？

2 个答案: