Its better to use
ArrayAdapter<String> adapter=new
ArrayAdapter<String>(playlist_new.this,android.R.layout.simple_list_item_multiple_choice,song_name);
lv.setAdapter(adapter);
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
On Sat, Jan 29, 2011 at 10:51 PM, Nick <[email protected]> wrote:
> Hi! I have ONE annoying problem with SimpleCursorAdapter. My programm
> has list view and ListActivity. Each row has it's own layout:
>
> <TableLayout xmlns:android="http://schemas.android.com/apk/res/
> android"
> android:layout_height="wrap_content"
> android:layout_width="fill_parent"
> android:orientation="horizontal" android:weightSum="1.0">
> <TableRow>
> <TextView android:id="@+id/task_time"
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:textSize="24sp" android:text="Time">
> </TextView>
> <LinearLayout android:orientation="vertical"
> android:layout_width="wrap_content"
> android:layout_height="fill_parent">
> <TextView android:id="@+id/task_name"
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:textSize="20sp" android:text="Name">
> </TextView>
> <TextView android:id="@+id/task_categoty"
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="Category" android:textSize="12sp">
> </TextView>
> </LinearLayout>
> <TextView android:id="@+id/task_state"
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:text="State" android:textSize="12sp">
> </TextView>
> <CheckBox android:id="@+id/task_enabled"
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:focusable="false">
> </CheckBox>
>
> </TableRow>
> Tasks are stored in SQLite database. I have DAO object (singleton) to
> access the database. TaskDao:
>
> public void updateEnabled(int id, boolean enabled){
> SQLiteDatabase db = dbHelper.getWritableDatabase();
> ContentValues cv = new ContentValues();
> cv.put(ENABLED_COLUMN, enabled==true?1:0);
> Log.i(TAG, "update to " + cv.get(ENABLED_COLUMN) );
> try{
> db.beginTransaction();
> db.update(TASK_TABLE, cv, ID_COLUMN+"=?", new String[]{id
> +""});
> db.setTransactionSuccessful();
> } catch (SQLException e) {
> Log.i(TAG, "edit task failed!");
> } finally {
> db.endTransaction();
> if (db != null)
> db.close();
> }
> }
> and the Cursor method for ListActivity:
>
> public Cursor getTasks(){
> SQLiteDatabase db = dbHelper.getReadableDatabase();
> return db.query(TASK_TABLE, COLUMNS, null, null, null, null,
> NAME_COLUMN);
> }
> I extended SimpleCursorAdapter (TaskDbAdapter) like this:
>
> @Override
> public View getView(int position, View convertView, ViewGroup parent)
> {
> if(convertView==null){
> convertView = inflater.inflate(R.layout.task_list_row, null);
> }
> Cursor c = getCursor();
> c.moveToPosition(position);
> Log.i(TAG, "getView " + position + " = " + c.getInt(enabledIdx));
> enabled.setTag(c.getInt(c.getColumnIndex(BaseColumns._ID)));
> enabled.setChecked(c.getInt(enabledIdx)>0?true:false);
> enabled.setOnClickListener(this);
> return convertView;
> }
> @Override
> public void onClick(View v) {
> CheckBox box = (CheckBox) v;
> Integer id = (Integer)box.getTag();
> TaskDao.getInstance(context).updateEnabled(id.intValue(),
> box.isChecked());
> }
> And at last I use all the above stuff in my main ListActivity
>
> private void refreshList(){
> c = TaskDao.getInstance(this).getTasks();
> startManagingCursor(c);
> adapter = new TaskDbAdapter(this, R.layout.task_list_row, c, new
> String[]{TaskDao.ENABLED_COLUMN}, new int[]{R.id.task_enabled});
> setListAdapter(adapter);
> }
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.task);
> getListView().setItemsCanFocus(false);
> getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
> getListView().setVerticalScrollBarEnabled(true);
> registerForContextMenu(getListView());
> getListView().setOnCreateContextMenuListener(this);
> refreshList();
> }
>
>
> @Override
> protected void onResume() {
> super.onResume();
> refreshList();
> }
> @Override
> protected void onPause() {
> super.onPause();
>
> }
> Everything works fine. But CheckBoxes loose their states. For instance
> I check my first column and scroll the list down. In my trace before
> press I have:
>
> getView 0 = 0
> getView 2 = 0
> getView 3 = 0
> then
>
> uptate to 1
> and then (when I scroll up to the first element)
>
> getView 0 = 0
> getView 2 = 0
> getView 3 = 0
> I tried to make getCursor().requery(); in my TaskDbAdapter onClick
> method. But then I saw no items in the list! And exception because of
> cursor management(connection was closed by android). When I write
> startManagingCursor(c); in refreshList() method then check and uncheck
> methods don't work. Please, Help!
>
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