android-cursoradapter | 易学教程

How to change background color of searched text in listview-cursoradapter while typing in searchview?

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问题 I've seen tutorials about highlighting text in listview using Spannable string but there is none about searching text from database and highlighting in listview . I have a listview which gets data from database/cursor and shows with the help of cursoradapter . I've placed searchview in action bar to search text from database table. Now i want that when i type a character or word in searchview, every matched result from database table should highlight/change background color of textview in

CursorAdapter vs ArrayAdapter for a ListView

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问题 I want to fill my ListView with data that's going to come from the web in the form of JSON. The list should be theoretically infinite, with the app making requests for more data if scrolled to the bottom. Should I use a Cursor or an Array(List) adapter to link my online database with my ListView ? More generally, what are the arguments to consider when choosing between cursor and array ? 回答1: Well I think you should look at ContentProviders . They are more natural to the problem that you are

Custom cursor adapter calling bindView multiple times

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问题 I have been suffering this issue for months and months (but now I am performance tuning). However, I now desperately need to know why my adapter feels it is necessary to run bindView up to 4 times on a record. I have a custom cursor adapter that populates a gridview. Some debug to show what's going on: 03-08 14:46:47.980: I/AdapterCursorGrid(20724): newView() 03-08 14:46:48.470: I/AdapterCursorGrid(20724): bindView() 03-08 14:46:48.570: I/AdapterCursorGrid(20724): --------------------------

Return object from CursorAdapter.get()

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问题 I'm overriding CursorAdapter and I need to get the last item, problem is that CursorAdapter has actually a get() method...but source is a db and it returns a plain object!! (I don't even know what is it, I'd expect it returning a Cursor object instead...) Neverthless, how can I make it return an instance of my Wrapper db row class? Example: say my db has rows like these: id|first name| surname I'd make a class Person from that. Now I'd like to have a Person get(int i) method from cursor

How to create Cursor data without getting data from the DataBase in Android application?

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问题 In my Android application, I am using Sqlite DataBase to store the data from the server. I am using ContentProvider and ContentResolver to access the data from the DataBase and using CursorAdapter to bind the data to the ListView. As soon the data is inserted into the DataBase, CursorAdapter will be notified to update the ListView. Also, whenever I scroll the ListView, I get new data from the DataBase table and ListView will be updated. But once I reaches to the end of the table row, I need

Custom CursorAdapter and CheckBox states

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I have a problem with trying to use a suggested CursorAdapter implementation together with a CursorLoader. The CursorAdapter works beatifully when I can provide it with a static set of data through a Cursor, but when I try and combine this with a CursorLoader I get a problem with nullpointers. I have pinned it down to the fact that when I feed the adapter a cursor, it is initially empty (set to null as is frequently suggested when dealing with a CursorLoader implementation). The Adapter, on instantiation, loops through the cursor to figure out what state a checkbox is in and then goes through

Custom CursorAdapter and CheckBox states

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问题 I have a problem with trying to use a suggested CursorAdapter implementation together with a CursorLoader. The CursorAdapter works beatifully when I can provide it with a static set of data through a Cursor, but when I try and combine this with a CursorLoader I get a problem with nullpointers. I have pinned it down to the fact that when I feed the adapter a cursor, it is initially empty (set to null as is frequently suggested when dealing with a CursorLoader implementation). The Adapter, on

Checkbox listener in ListView with CursorAdapter

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问题 I have a problem very similar than this post. In every row of my ListView I have a checkbox with a listener. The Listener update databse row. @Override public void bindView(View v, Context context, Cursor c) { TextView tvA = (TextView) v.findViewById(R.id.adi_tv_activity); CheckBox cb = (CheckBox) v.findViewById(R.id.adi_cbox); tvA.setText(c.getString(c.getColumnIndex("name"))); final long id = c.getLong(c.getColumnIndex("_id")); final Context ctx = context; cb.setOnCheckedChangeListener(new

ListView Requires 2 setSelection's to Scroll to Item

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问题 Peculiar problem I'm having with a cursoradapter in a listfragment. In my onLoadFinished I select the previously selected item in order to scroll the listview to the previous position (and then highlight that item). This works splendidly, except for the scrolling part. If I just use one post and delay it (even say 5 seconds), the item gets selected but the list will not scroll (the selected item may out of view at this time) With or without delay same behavior with just one post. I have to

Cursor not binding text correctly with custom adapter

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问题 My Custom Adapter that extends SimpleCursorAdapter for my ListFragment does not display the items in my database correctly. it does not display the text in the TextView, what else do I have to do to the cursor for it to show the correct text? I thought I had to override the bindView but that had no effect Setting the adapter: public void populateList(){ String[] fields = new String[] {BowlersDB.NAME}; Cursor c = getActivity().getContentResolver().query(BowlersDB.CONTENT_URI, new String[]