如何在single_choice和multiple_choice中使用SimpleCursorAdapter

Question

我正在开发一个测验应用程序，它包含多个答案类型和单一答案type.the问题和答案存储在sqlite数据库中。我使用简单的游标适配器，并了解如何使用here！我的问题是，如果我的答案类型改变(从单一到多个)，我如何从simple_list_item_single_choice切换到simple_list_item_multiple_choice，以及我如何保存答案choosen.Please给出一些关于it.Here是编码的想法……

  db = new DBAdapter(this);
  SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, 
  android.R.layout.simple_list_item_1, 
  db.getAllTitles(), 
  new String[] { "title" }, 
  new int[] { android.R.id.text1 });

 ListView listView = (ListView) findViewById(R.id.list);
listView.setAdapter(adapter);

Answer 1

检查此代码:对于单项选择：

 SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, 
  android.R.layout.simple_list_item_single_choice, 
  db.getAllTitles(), 
  new String[] { "title" }, 
  new int[] { android.R.id.text1 });

 ListView listView = (ListView) findViewById(R.id.list);
 listView.setAdapter(adapter);
 listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

对于多个：

SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, 
  simple_list_item_multiple_choice, 
  db.getAllTitles(), 
  new String[] { "title" }, 
  new int[] { android.R.id.text1 });

 ListView listView = (ListView) findViewById(R.id.list);
 listView.setAdapter(adapter);
 listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

根据您的要求，您必须设置以上其中之一:我想您已经知道哪些问题需要单个ans &哪些问题需要多个ans，这取决于您还必须创建列表项，单击like

listView.setOnItemClickListener(new OnItemClickListener() {

            private String my_sel_items;

            public void onItemClick(AdapterView arg0, View arg1, int arg2,
                    long arg3) {
                if(ans == multiple){
                my_sel_items = new String("Selected Items");
                SparseBooleanArray a = lView.getCheckedItemPositions();

                for (int i = 0; i < a.size(); i++) {
                    if (a.valueAt(i)) {
                        my_sel_items = my_sel_items + ","
                                + (String) listView.getAdapter().getItem(i);
                    }
                }
                Log.v("values", my_sel_items);
               }else{
                 // for single it default selected item
               }
            }
        });