与SimpleCursorAdapter Android的ListView控件更新 [英] Android ListView update with SimpleCursorAdapter

问题描述

嘿，我用一个ListView用于展示其存储在数据库中的条目。我也有一个元素的EditText和一个按钮，添加的EditText内容到数据库中。要将视图绑定到数据库的内容我使用SimpleCursorAdapter及以下填充功能：

Hey i use a listview for demonstrate entries which are stored in a database. I also have a EditText element and a button which adds the content of the EditText into the Database. To bind the view to the database content i use the SimpleCursorAdapter and following populate function:

private void populate() {
    cursor = dbAdapter.getAllItems();
    startManagingCursor(cursor);

    String[] from = new String[] { DBAdapter.KEY_TASK };
    int[] to = new int[] { android.R.id.text1 };

    // Now create an array adapter and set it to display using our row
    cursorAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, cursor, from, to);
    list.setAdapter(cursorAdapter);
}

如果我增加了一个新的条目，点击我要刷新列表视图按钮，但是这只能用于填充功能，而不是常见的接口函数 notifyDataSetChanged（）; 。我有一个bug或者，这是正确的方式来刷新列表视图？

If i added a new entry, by clicking on the button i want to refresh the listview but this only works with the populate function and not with the common adapter function notifyDataSetChanged();. Do i have a bug or is this the right way to refresh a listview?

推荐答案

你见过<一个href="http://stackoverflow.com/questions/1985955/android-simplecursoradapter-not-updating-with-database-changes">this,尝试了<一href="http://developer.android.com/reference/android/widget/SimpleCursorAdapter.html#swapCursor%28android.database.Cursor%29">swap光标方法，或尝试只是简单调用<一href="http://stackoverflow.com/questions/5113180/android-refresh-listview-using-listadapter-and-simplecursoradapter">setAdapter()再次？

Have you seen this, tried the swap cursor method, or tried just simply calling setAdapter() again?

我有一个类似的问题，我不能让我的名单进行更新，而我所做的只是创建一个refreshListView（）方法。现在，你可以从你的onCreate（）调用这个最初，随时随地用户添加的东西到数据库。它所做的就是重新绑定列表视图，以光标。与所有的德precating方法（重新查询（）），以及问题notifyDataSetChanged（），我决定这是最简单的方法。

I had a similar issue where I could not get my list to update, and what I did was just create a refreshListView() method. Now you can call this initially from your onCreate(), AND anytime a user adds something to the DB. All it does is re-bind the listview to a cursor. With all the deprecating methods (requery()), and issues with notifyDataSetChanged(), I decided this was the easiest way.

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