Hi,
I've spent over a week trying to figure out a way to do a Limited
Multi Selection Preference list. Meaning I want to limit how many of
the items a user can check. Nothing I've tried works. I'm ready to
give up on Android if something seemingly simple is so hard. I've been
programming a long time and don't remember being beaten up this badly
by something like this. I have to assume I am not understanding
something basic. I hope someone can point me in the right direction.
Here is the simplest code I can think off that should work. It does
not clear the checkbox even when setting it to false, I've tried true
as well. Why doesn't that work? If that will not work, what will?
Any help would be most appreciated.
@Override
protected void onPrepareDialogBuilder(Builder builder)
{
CharSequence[] entries = getEntries();
CharSequence[] entryValues = getEntryValues();
if (entries == null || entryValues == null || entries.length !
= entryValues.length ) {
throw new IllegalStateException(
"ListPreference requires an entries array and an
entryValues array which are both the same length");
}
// Added by WJT since we are loading the entries values after
instantiation
// we need the clicked indexes to be setup now, they would not
have been
// set up in the constructor
if ((mClickedDialogEntryIndices == null) ||
(mClickedDialogEntryIndices.length == 0))
mClickedDialogEntryIndices = new
boolean[getEntries().length];
restoreCheckedEntries();
builder.setMultiChoiceItems(entries,
mClickedDialogEntryIndices,
new DialogInterface.OnMultiChoiceClickListener()
{
public void onClick(DialogInterface dialog, int which,
boolean
val)
{
mDlg = (AlertDialog)getDialog();
mListView = (ListView)mDlg.getListView();
if (val)
{
if (mSelectedCount < mLimit)
{
mClickedDialogEntryIndices[which] = val;
mSelectedCount++;
}
else
{
mListView.setItemChecked(which, false);
Toast.makeText(getContext(),
R.string.newsLimitExceededMessage,
Toast.LENGTH_LONG).show();
} // (mSelectedCount < mLimit)
}
else
{
mClickedDialogEntryIndices[which] = val;
mSelectedCount--;
} // (val)
} // void onClick(DialogInterface dialog,
int which, boolean val)
}); // DialogInterface.OnMultiChoiceClickListener()
} // void onPrepareDialogBuilder(Builder builder)
Thanks,
\ ^ / i l l
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