データベースからのデータがいくつかあり、その前にリストビューに表示されているものを、インデクサーを使用してアルファベット順に並べています。したがって、リストには、セクションヘッダーを使用してアルファベット順に並べられたアイテムが表示されています。単語を使用してリストからアイテムを検索したいそのためにフィルターとテキストウォッチャーを使用できることはわかっていますが、リストビューに設定しているアダプターはarrayadapterではなくSimpleSectionAdapterであるため、その使用方法.
dbHelper.openDataBase();
Cursor cursor = dbHelper.fetchAllRecords();
Log.v("count of records", cursor.getCount() + "");
ArrayList<CategoryPojo> contents = new ArrayList<CategoryPojo>();
cursor.moveToFirst();
CategoryPojo cp;
while (cursor.isAfterLast() == false) {
cp = new CategoryPojo();
cp.setCategoryName(cursor.getString(cursor
.getColumnIndex(DataBaseHelper.KEY_CATEGORIES)));
cp.setCategoryImageName(cursor.getString(cursor
.getColumnIndex(DataBaseHelper.KEY_IMAGENAME)));
cursor.moveToNext();
contents.add(cp);
}
cursor.close();
dbHelper.close();
Collections.sort(contents, new Comparator<CategoryPojo>() {
@Override
public int compare(CategoryPojo s1, CategoryPojo s2) {
return s1.getCategoryName().compareToIgnoreCase(
s2.getCategoryName());
}
});
final CategoryAdapter adapter = new CategoryAdapter(this,
android.R.layout.simple_list_item_1, contents);
Sectionizer<CategoryPojo> alphabetSectionizer = new Sectionizer<CategoryPojo>() {
@Override
public String getSectionTitleForItem(CategoryPojo instance) {
return instance.getCategoryName().substring(0, 1);
}
};
final SimpleSectionAdapter<CategoryPojo> sectionAdapter = new SimpleSectionAdapter<CategoryPojo>(
this, adapter, R.layout.section_header, R.id.title,alphabetSectionizer);
listView.setFastScrollEnabled(true);
listView.setTextFilterEnabled(true);
listView.setAdapter(sectionAdapter);
edtSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
And Simplesectionadapter is
public class SimpleSectionAdapter extends BaseAdapter implements Filterable { private ArrayList mOriginalValues, mDisplayedValues;
static final boolean DEBUG = false;
static final String TAG = SimpleSectionAdapter.class.getSimpleName();
// Constants
private static final int VIEW_TYPE_SECTION_HEADER = 0;
private Context mContext;
private BaseAdapter mListAdapter;
private int mSectionHeaderLayoutId;
private int mSectionTitleTextViewId;
private Sectionizer<T> mSectionizer;
private LinkedHashMap<String, Integer> mSections;
AlphabetIndexer alphaIndexer;
public SimpleSectionAdapter(Context context, ArrayList<CategoryPojo> contents, BaseAdapter listAdapter,
int sectionHeaderLayoutId, int sectionTitleTextViewId,
Sectionizer<T> sectionizer) {
if (context == null) {
throw new IllegalArgumentException("context cannot be null.");
} else if (listAdapter == null) {
throw new IllegalArgumentException("listAdapter cannot be null.");
} else if (sectionizer == null) {
throw new IllegalArgumentException("sectionizer cannot be null.");
} else if (!isTextView(context, sectionHeaderLayoutId,
sectionTitleTextViewId)) {
throw new IllegalArgumentException(
"sectionTitleTextViewId should be a TextView.");
}
this.mOriginalValues = contents;
this.mDisplayedValues = contents;
this.mContext = context;
this.mListAdapter = listAdapter;
this.mSectionHeaderLayoutId = sectionHeaderLayoutId;
this.mSectionTitleTextViewId = sectionTitleTextViewId;
this.mSectionizer = sectionizer;
this.mSections = new LinkedHashMap<String, Integer>();
// Find sections
findSections();
}
private boolean isTextView(Context context, int layoutId, int textViewId) {
View inflatedView = View.inflate(context, layoutId, null);
View foundView = inflatedView.findViewById(textViewId);
return foundView instanceof TextView;
}
@Override
public int getCount() {
return mDisplayedValues.size();
//return mListAdapter.getCount() + getSectionCount();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
SectionHolder sectionHolder = null;
switch (getItemViewType(position)) {
case VIEW_TYPE_SECTION_HEADER:
if (view == null) {
view = View.inflate(mContext, mSectionHeaderLayoutId, null);
sectionHolder = new SectionHolder();
sectionHolder.titleTextView = (TextView) view
.findViewById(mSectionTitleTextViewId);
view.setTag(sectionHolder);
} else {
sectionHolder = (SectionHolder) view.getTag();
}
break;
default:
view = mListAdapter.getView(getIndexForPosition(position),
convertView, parent);
break;
}
if (sectionHolder != null) {
String sectionName = sectionTitleForPosition(position);
sectionHolder.titleTextView.setText(sectionName);
}
return view;
}
@Override
public boolean areAllItemsEnabled() {
return mListAdapter.areAllItemsEnabled() ? mSections.size() == 0
: false;
}
@Override
public int getItemViewType(int position) {
int positionInCustomAdapter = getIndexForPosition(position);
return mSections.values().contains(position) ? VIEW_TYPE_SECTION_HEADER
: mListAdapter.getItemViewType(positionInCustomAdapter) + 1;
}
@Override
public int getViewTypeCount() {
return mListAdapter.getViewTypeCount() + 1;
}
@Override
public boolean isEnabled(int position) {
return mSections.values().contains(position) ? false : mListAdapter
.isEnabled(getIndexForPosition(position));
}
@Override
public Object getItem(int position) {
return mListAdapter.getItem(getIndexForPosition(position));
}
@Override
public long getItemId(int position) {
return mListAdapter.getItemId(getIndexForPosition(position));
}
@Override
public void notifyDataSetChanged() {
mListAdapter.notifyDataSetChanged();
findSections();
super.notifyDataSetChanged();
}
/**
* Returns the actual index of the object in the data source linked to the
* this list item.
*
* @param position
* List item position in the {@link ListView}.
* @return Index of the item in the wrapped list adapter's data source.
*/
public int getIndexForPosition(int position) {
int nSections = 0;
Set<Entry<String, Integer>> entrySet = mSections.entrySet();
for (Entry<String, Integer> entry : entrySet) {
if (entry.getValue() < position) {
nSections++;
}
}
return position - nSections;
}
static class SectionHolder {
public TextView titleTextView;
}
private void findSections() {
int n = mListAdapter.getCount();
int nSections = 0;
mSections.clear();
for (int i = 0; i < n; i++) {
@SuppressWarnings("unchecked")
String sectionName = mSectionizer
.getSectionTitleForItem((T) mListAdapter.getItem(i));
if (!mSections.containsKey(sectionName)) {
mSections.put(sectionName, i + nSections);
nSections++;
}
}
if (DEBUG) {
Log.d(TAG, String.format("Found %d sections.", mSections.size()));
}
}
private int getSectionCount() {
return mSections.size();
}
private String sectionTitleForPosition(int position) {
String title = null;
Set<Entry<String, Integer>> entrySet = mSections.entrySet();
for (Entry<String, Integer> entry : entrySet) {
if (entry.getValue() == position) {
title = entry.getKey();
break;
}
}
return title;
}
@Override
public Filter getFilter() {
return new android.widget.Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
mDisplayedValues = (ArrayList<CategoryPojo>) results.values;
// has
// the
// filtered
// values
notifyDataSetChanged(); // notifies the data with new filtered
// values
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the
// results of a
// filtering
// operation in
// values
ArrayList<CategoryPojo> FilteredArrList = new ArrayList<CategoryPojo>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<CategoryPojo>(mDisplayedValues);
}
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
String data = String.valueOf(mOriginalValues.get(i)
.getCategoryName());
if (data.toLowerCase()
.startsWith(constraint.toString())) {
FilteredArrList.add(new CategoryPojo(
mOriginalValues.get(i).getCategoryName(),
mOriginalValues.get(i)
.getCategoryImageName()));
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
}
}