【发布时间】:2015-10-27 01:59:55
【问题描述】:
我在设置特定适配器时试图让我的 android 应用跟踪用户输入时遇到问题。
所以在我的片段类中,当片段被拾取到活动中时,我有这个函数。
@Override
public void onListItemClick(ListView l, View v, int pos, long id) {
System.out.println("clicked");
// Indicates the selected item has been checked
getListView().setItemChecked(pos, true);
// Inform the QuoteViewerActivity that the item in position pos has been selected
mListener.onListSelection(pos);
}
@Override
public void onCreate(Bundle savedInstanceState) {
Log.i(TAG, getClass().getSimpleName() + ":entered onCreate()");
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.i(TAG, getClass().getSimpleName() + ":entered onCreate()");
return super.onCreateView(inflater, container, savedInstanceState);
}
public void onActivityCreated(Bundle savedState) {
Log.i(TAG, getClass().getSimpleName() + ":entered onActivityCreated()");
super.onActivityCreated(savedState);
dbHelper= new dbHelper(getActivity());
Cursor cursor = dbHelper.selectJoinDecksQuestions("jjj");
cursor.moveToFirst();
setListAdapter(new QuestionCursorAdapter(getActivity(), cursor));
}
调用适配器并将光标返回的数据填充到文本视图列表中。问题是这些数据都不是可选的。
如果我将 onActivityCreated 方法更改为显示此数据并且可以选择:
public void onActivityCreated(Bundle savedState) {
Log.i(TAG, getClass().getSimpleName() + ":entered onActivityCreated()");
super.onActivityCreated(savedState);
Set the list adapter for the ListView
Discussed in more detail in the user interface classes lesson
setListAdapter(new ArrayAdapter<String>(getActivity(),
R.layout.question_fragment, MainContentActivity.mTitleArray));
}
问题适配器如下所示
public QuestionCursorAdapter(Context context, Cursor c) {
// that constructor should be used with loaders.
super(context, c, 0);
inflater = LayoutInflater.from(context);
System.out.println("leaving constructor of the questioncursoradapter");
System.out.println(getCount());
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
System.out.println("in bind view");
TextView list_item = (TextView)view.findViewById(R.id.question_in_list);
list_item.setText(cursor.getString(cursor.getColumnIndex(COLUMN_NAME_QUESTIONTEXT)));
list_item.setMovementMethod(new ScrollingMovementMethod());
int position = cursor.getPosition(); // that should be the same position
System.out.println("leaving bind view");*/
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
System.out.println("newView in QuestionCursorAdapter entered");
//question_fragment/cusoradaptertest
View v = inflater.inflate(R.layout.question_fragment, null);
System.out.println("leave newview");
return v;
}
关于为什么 ArrayAdapter 返回可选择的数据而我的自定义 CursorAdapter 没有的任何想法?
【问题讨论】:
-
仍在为此苦苦挣扎。我认为这是我如何尝试使用点击监听器的问题。我已经在片段类中覆盖了 onListItemClick,但我不确定是否因为这是一个自定义适配器,我需要在适配器中创建一个新的?
-
所以我在适配器中设置了一个监听器,它记录了点击。我想我接下来要做的就是编写一些回调,将点击从适配器推回主要活动。如果这是一种正确的方法,或者应该全部在片段中设置,或者没有真正的区别,我想要输入。
标签: android onclick android-listfragment android-cursoradapter selectable