我花了一个多星期的时间试图找出一种方法来做一个有限的多选偏好列表。我尝试过的没有任何效果。如果看似简单的事情如此困难，我已经准备好放弃 Android 了。我已经编程很长时间了，不记得被这样的东西打得这么惨。我不得不假设我不了解一些基本的东西。我希望有人能指出我正确的方向。
这是我能想到的最简单的代码。即使将其设置为false，它也不会清除复选框，我也尝试过true。为什么那行不通？如果这行不通，那会怎样？
非常感激任何的帮助。
@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)
谢谢，
\ ^ / 生病了