1

I am using simple_list_item_multiple_choice with list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); to create a list of check boxes populated from a database query. I am then using onListItemClick to handle the clicking of the list, again that is working fine. What I can find no way of doing (after 5 days) is writing an if statement based on whether or not the check box attached to the list item is checked. What I need is the equivalent of the example below which works perfectly for a check box where I can use the android:onClick element to fire the method below. 

public void onCheckboxClicked(View v) {
        // Perform action on clicks, depending on whether it's now checked
        if (((CheckBox) v).isChecked()) {
            Toast.makeText(this, "Selected", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "Not selected", Toast.LENGTH_SHORT).show();
        }
    }

This is critical to my app so any advice would be greatly appreciated. Below is the simpleCusrorAdapter is am using:

 Cursor cursor3 = db.rawQuery("SELECT _id, symname FROM tblsymptoms WHERE _id IN ("+sympresult+") ", null);

        adapter = new SimpleCursorAdapter(
                this, 
                android.R.layout.simple_list_item_multiple_choice,
                cursor3, 
                new String[] {"symname","_id"}, 
                new int[] {android.R.id.text1});
        setListAdapter(adapter);
        ListView list=getListView();
        list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
4

2 回答 2

3

在找到这个非常有用的博客项目后我已经解决了这个问题

我将我的 onListItemClick 更改为以下内容，它就像一个梦一样工作：

public void onListItemClick(ListView parent, View view, int position, long id) {


      CheckedTextView check = (CheckedTextView)view;
      check.setChecked(!check.isChecked());
      boolean click = !check.isChecked();
      check.setChecked(click);
      if (click) {
            Toast.makeText(this, "Not Selected", Toast.LENGTH_SHORT).show();
      } else {
          Toast.makeText(this, "Selected", Toast.LENGTH_SHORT).show();
      } 
}
于 2012-03-17T19:15:28.603 回答
0

如果我理解正确，您列表中的每一行都有一个复选框。When an item in the list is selected you want to be able to tell if the corresponding checkbox is checked?

尝试对每个列表项 View 对象使用 setTag(...) 方法。然后，当调用 onListItemClick() 方法时，您可以在视图上调用 getTag(...) （这将返回您的复选框）。我假设您正在使用自定义适配器来填充列表。填充时要调用：

   setTag( CHECKBOX_KEY, checkbox );

例如：

protected void onListItemClick(ListView l, View v, int position, long id) {
    CheckBox cb = (CheckBox)v.getTag( CHECKBOX_KEY );

    boolean isChecked = false;

    if( null != cb ) {
        isChecked = cb.isChecked();
    }

    // .. do whatever you have to here...    

}

希望这可以帮助...

于 2012-03-17T00:59:17.937 回答