如何使用复选框在自定义列表视图中打开选项菜单？

Question

我有两个问题。 1）如何在自定义列表视图中单击复选框打开选项菜单  使用复选框和2）如何在选中复选框时删除列表视图项（它必须适用于多个复选框）。

这是我的代码..

CheckListModel.java

      public class CheckListModel
     {
          private String name;
          private boolean selected;

      public CheckListModel(String paramString)
       {
           this.name = paramString;
            this.selected = false;
        }

       public String getName()
        {
            return this.name;
         }

        public boolean isSelected()
        {
            return this.selected;
         }

        public void setName(String paramString)
        {
               this.name = paramString;
         }

          public void setSelected(boolean paramBoolean)
         {
              this.selected = paramBoolean;
          }
      }

ListwithCheckboxAdapter.java

    public class ListwithCheckboxAdapter extends ArrayAdapter<CheckListModel>
    implements OnCheckedChangeListener {

private final List<CheckListModel> list;
private final Activity context;
ViewHolder viewHolder;

public ListwithCheckboxAdapter(Activity context, List<CheckListModel> list) {
    super(context, R.layout.listcheckbox, list);
    this.context = context;
    this.list = list;
}

static class ViewHolder {
    protected TextView text;
    protected CheckBox checkbox;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View view = null;
    if (convertView == null) {
        LayoutInflater inflator = context.getLayoutInflater();
        view = inflator.inflate(R.layout.listcheckbox, null);
        viewHolder = new ViewHolder();
        viewHolder.text = (TextView) view.findViewById(R.id.label);
        viewHolder.checkbox = (CheckBox) view.findViewById(R.id.check);
        viewHolder.checkbox.setOnCheckedChangeListener(this);

        view.setTag(viewHolder);
        viewHolder.checkbox.setTag(list.get(position));
    } else {
        view = convertView;
        ((ViewHolder) view.getTag()).checkbox.setTag(list.get(position));
    }
    ViewHolder holder = (ViewHolder) view.getTag();
    holder.text.setText(list.get(position).getName());
    holder.checkbox.setChecked(list.get(position).isSelected());
    return view;

}

@Override
public void onCheckedChanged(CompoundButton cb, boolean isChecked) {
    // TODO Auto-generated method stub

    CheckListModel element = (CheckListModel) viewHolder.checkbox.getTag();

    element.setSelected(cb.isChecked());
}

}

FavouriteActivity.java

       public class FavouriteActivity extends Activity implements OnItemClickListener {

   ListView mainListView;
   List<CheckListModel> list;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // TODO Auto-generated method stub

    getMenuInflater().inflate(R.menu.fav_menu, menu);

    return true;

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // TODO Auto-generated method stub
    super.onOptionsItemSelected(item);

    switch (item.getItemId()) {

    case R.id.delete:

    case R.id.deselect:


        break;

    default:
        break;
    }
    return true;
}

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);

    setContentView(R.layout.favourites);

    // Find the ListView resource.
    mainListView = (ListView) findViewById(R.id.list);


    ArrayAdapter<CheckListModel> adapter = new ListwithCheckboxAdapter(
            this, getModel());
    mainListView.setAdapter(adapter);



}

private List<CheckListModel> getModel() {

    list = new ArrayList<CheckListModel>();

    list.add(get("Mitesh"));
    list.add(get("Agrawal"));


    return list;
}

private CheckListModel get(String s) {
    // TODO Auto-generated method stub
    return new CheckListModel(s);
}

@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

}

}

Answer 1

您可以使用openOptionsMenu();打开选项菜单。

要删除列表项，请从List Object删除条目并调用adapterObj.notifyDataSetChanged();方法更新ListView。

Answer 2

我做到了..

使用Checkbox在自定义列表视图中打开选项菜单。

  Activity activity = context;
 activity.openOptionsMenu();