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リスト項目の isChecked 状態を同じ生のチェックボックスと同期する際に問題があります。リスト項目で「チェック済み」状態を設定することはできますが、CheckBox の「チェック済み」状態を設定する方法がわかりません。mainListView.setItemChecked が機能するはずだと思いましたが、機能しません。

これは私が使用しているコードです:

public class Reservation_Activity extends ListActivity  {
int total=0;
private name_price[] lv_arr = {};
private ListView mainListView = null;
final String SETTING_TODOLIST = "todolist";
TextView total_tv;




/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.reservation);


    total_tv = (TextView) findViewById(R.id.total_sum);
    Button btnSave = (Button) findViewById(R.id.btnSave);
    btnSave.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {

            Toast.makeText(getApplicationContext(),
                    " You clicked Save button", Toast.LENGTH_SHORT).show();


        }
    });

    Button btnClear = (Button) findViewById(R.id.btnClear);
    btnClear.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            total=0;
            total_tv.setText("Pick and Send");
            Toast.makeText(getApplicationContext(),
                    " You clicked Clear button", Toast.LENGTH_SHORT).show();

            ClearSelections();
        }
    });

    // Prepare an ArrayList of todo items
    ArrayList<name_price> listTODO = PrepareListFromXml();
    this.mainListView = getListView();
    mainListView.setCacheColorHint(0);

    // Bind the data with the list
    lv_arr = (name_price[]) listTODO.toArray(lv_arr);

    mainListView.setAdapter(new MyAdapter(this,android.R.layout.simple_list_item_multiple_choice,lv_arr));

    mainListView.setItemsCanFocus(false);
    mainListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

    mainListView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position,long arg3) {
            name_price item = (name_price) mainListView.getItemAtPosition(position);

            if(mainListView.isItemChecked(position))
            {
                mainListView.setItemChecked(position, false);
                total = total - item._price;
            }  else  {
                mainListView.setItemChecked(position, true);
                total += item._price;
            }

            total_tv.setText("Total: " + total);

        }

    });


}

private void ClearSelections() {
    total=0;
    // user has clicked clear button so uncheck all the items

    int count = this.mainListView.getAdapter().getCount();

    for (int i = 0; i < count; i++) {
        this.mainListView.setItemChecked(i, false);
    }
}


private ArrayList<name_price> PrepareListFromXml() {
    ArrayList<name_price> todoItems = new ArrayList<name_price>();
    XmlResourceParser todolistXml = getResources().getXml(R.xml.order_items);
    int id=0;

    int eventType = -1;
    while (eventType != XmlResourceParser.END_DOCUMENT) {
        if (eventType == XmlResourceParser.START_TAG) {

            String strNode = todolistXml.getName();
            if (strNode.equals("item")) {
                todoItems.add(new name_price(id,todolistXml.getAttributeValue(null, "title"), Integer.parseInt(todolistXml.getAttributeValue(null, "price"))));
                id++;
            }
        }

        try {
            eventType = todolistXml.next();
        } catch (XmlPullParserException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    return todoItems;
}


public class MyAdapter extends ArrayAdapter<name_price> {
    name_price[] items;

    public MyAdapter(Context context, int textViewResourceId,
            name_price[] objects) {
        super(context, textViewResourceId, objects);
        this.items = objects;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = getLayoutInflater();
        View row = inflater.inflate(R.layout.list_raw_resevation, parent, false);

        TextView name,price;

        CheckBox ckbx = (CheckBox) row.findViewById(R.id.UpdateCheckBox);

        ckbx.setChecked(mainListView.isItemChecked(position));

        name = (TextView) row.findViewById(R.id.res_name);
        name.setText(items[position]._name);
        price = (TextView) row.findViewById(R.id.res_price);
        price.setText(Integer.toString(items[position]._price));

        return row;
    }

    public name_price getItem(int position) {
        return items[position];
    }

}
}


class name_price {
public String _name;
public int _price;
public int _id;
public CheckBox ckbx;

public name_price(int id, String name, int price)
{
    this._id=id;
    this._name = name;
    this._price = price;
}

public name_price() {
    // TODO Auto-generated constructor stub
}

}

これに従って mainListView.setOnItemClickListener の特定のチェックボックスのチェック状態を変更する必要があると思いますが、それを行う方法が見つかりません。

さらに、これは生のレイアウトとリスト レイアウト (使用するその他のもの) です。

<?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="?android:attr/listPreferredItemHeight"
android:padding="6dip">

<LinearLayout
    android:layout_width="0dip"
    android:layout_height="fill_parent"
    android:layout_weight="1"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/res_name"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:layout_gravity="center_horizontal"
        android:gravity="center|left"
        android:singleLine="true"
        android:text="lalalalalalalalalallaallllaaaa"
        android:textColor="#ffffff" />

    <TextView
        android:id="@+id/res_price"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_marginRight="10dp"
        android:gravity="center"
        android:text="90"
        android:textColor="#ffffff"
        android:textSize="15dp" />
</LinearLayout>

<CheckBox android:text="" 
          android:id="@+id/UpdateCheckBox" 
          android:layout_width="wrap_content" 
          android:layout_height="wrap_content"
          android:focusable="false"  />
</LinearLayout>

リストのレイアウト:

<!--?xml version="1.0" encoding="utf-8"?-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent" 
    android:layout_height="fill_parent" android:background="#81BEF7" 
    android:scrollbars="vertical">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/Buttonlayout" android:orientation="horizontal" 
    android:layout_width="fill_parent" android:layout_height="wrap_content" 
    android:height="32dp" android:gravity="left|top" android:background="#2B60DE" 
    android:paddingTop="2dp" android:paddingBottom="2dp">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/Buttonlayout2" android:orientation="horizontal" 
    android:layout_height="wrap_content" android:gravity="left|center_vertical" 
    android:layout_width="wrap_content" android:layout_gravity="left|center_vertical">


<TextView android:id="@+id/total_sum" android:layout_width="fill_parent" 
    android:layout_height="fill_parent" android:textStyle="bold" 
    android:textColor="#FFFFFF" android:text="@string/list_header" 
    android:textSize="15sp" android:gravity="center_vertical" 
    android:paddingLeft="5dp">
</TextView>
</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/Buttonlayout22" android:orientation="horizontal" 
    android:layout_height="wrap_content" android:gravity="right" 
    android:layout_width="fill_parent" android:layout_gravity="right|center_vertical">

<Button android:id="@+id/btnSave" android:layout_width="wrap_content" 
    android:layout_height="wrap_content" android:text="Send" android:textSize="15sp" 
    android:layout_marginLeft="10px" android:layout_marginRight="10px" 
    android:layout_marginBottom="2px" android:layout_marginTop="2px" 
    android:height="15dp" android:width="70dp">
</Button>

<Button android:id="@+id/btnClear" android:layout_width="wrap_content" 
    android:layout_height="wrap_content" android:text="Clear" android:textSize="15sp" 
    android:layout_marginLeft="10px" android:layout_marginRight="10px" 
    android:layout_marginBottom="2px" android:layout_marginTop="2px" 
    android:height="15dp" android:width="70dp">
</Button>

</LinearLayout>
</LinearLayout>

<TableLayout android:id="@+id/TableLayout01" android:layout_width="fill_parent" 
    android:layout_height="fill_parent" >
<TableRow>
    <ListView android:id="@android:id/list" android:layout_width="wrap_content" 
        android:textColor="#000000" android:layout_height="wrap_content">
    </ListView>
</TableRow>
</TableLayout>
</LinearLayout>

ありがとう！よ

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