Android how do you code now if requery is deprecated?

问题

as per the topic. If we used to call cursor.requery(), but it is now deprecated, how do you call this function now?

"This method is deprecated. Don't use this. Just request a new cursor, so you can do this asynchronously and update your list view once the new cursor comes back."

So how does one request a new cursor and pass it back to the adapter?

回答1:

again re-initialize cursor when your any DML query execute, can refer this

回答2:

Just think about a block where you need to use cursor again and again. Populate it with the query. Work with it and then close before reusing

{
    Cursor c =//Populating cursor again
    while (c.moveToNext()) {
    }
    if (c != null) c.close();
}

回答3:

Use a Loader to manage your cursors. It will return a new Cursor as needed and you can use swapCursor() on the adapter to refresh the data.

回答4:

I used ListAdapter.notifyDataSetChanged(); this worked only on list (like ArrayList), when the listcontent changed. Using databaseoutput, it doesn't work anymore. Therefore I took cursor.requery(); which is not only depricated. It also works only, if database entries changed.

But now, I want to change my view (switch between birthdays and dates) by changing my settings in a database, so requery does not recognize it.

For all changes works (a little bit dirty): this.onCreate(null);

来源：https://stackoverflow.com/questions/7157023/android-how-do-you-code-now-if-requery-is-deprecated