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您好，我需要按照字母順序排序我的應用程序中的聯繫人列表。應用程序檢查哪個設備聯繫人在應用程序中註冊並將其放置在應用程序聯繫人列表中我有自定義簡單的遊標適配器：按字母順序排列聯繫人列表清單
package com.loopg.adapters;
import android.content.Context;
import android.database.Cursor;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AlphabetIndexer;
import android.widget.CheckBox;
import android.widget.SectionIndexer;
import android.widget.TextView;
import com.loopg.R;
import com.loopg.db.AppContacts;
import com.loopg.db.AppContactsData;
import com.loopg.db.AppProfiles;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
public class AllContactsAdapter extends SimpleCursorAdapter implements SectionIndexer {
private static final int TYPE_HEADER = 1;
private static final int TYPE_NORMAL = 0;
private static final int TYPE_COUNT = 2;
public HashMap<String, Boolean> hmSelected = new HashMap<String, Boolean>();
public int selectedContacts = 0;
Cursor mCursor = null;
private AlphabetIndexer indexer;
private int[] usedSectionNumbers;
private Map<Integer, Integer> sectionToOffset;
private Map<Integer, Integer> sectionToPosition;
private boolean showSelection = false;
private int rowCount = 0;
private int selectedNumbers = 0;
private Context invokerContext = null;
private String appStatus = "";
private String inviteStatus = "";
private String sectionHeaders = "#GHGJHJHKHJKGJHKLKJHGF";
public AllContactsAdapter(Context context, Cursor c, int layout, boolean forInvite) {
super(context, layout, c, new String[]{}, new int[]{}, 0);
invokerContext = context;
showSelection = forInvite;
mCursor = c;
initialize();
appStatus = context.getString(R.string.tw_default_status);
inviteStatus = context.getString(R.string.hf_invite_status);
}
public AllContactsAdapter(Context context, int layout, Cursor c, String[] from, int[] to, int flags) {
super(context, layout, c, from, to, flags);
}
@Override
public void changeCursor(Cursor cursor) {
super.changeCursor(cursor);
mCursor = cursor;
initialize();
}
private void initialize() {
hmSelected = new HashMap<String, Boolean>();
rowCount = mCursor.getCount();
indexer = new AlphabetIndexer(mCursor, mCursor.getColumnIndex(AppContacts.CLS.CONTACT_NAME), sectionHeaders);
// use a TreeMap because we are going to iterate over its keys in sorted
// order
sectionToPosition = new TreeMap<Integer, Integer>();
sectionToOffset = new HashMap<Integer, Integer>();
final int count = super.getCount();
int i;
// temporarily have a map alphabet section to first index it appears
// (this map is going to be doing something else later)
for (i = count - 1; i >= 0; i--) {
sectionToPosition.put(indexer.getSectionForPosition(i), i);
}
i = 0;
usedSectionNumbers = new int[sectionToPosition.keySet().size()];
// note that for each section that appears before a position, we must
// offset our
// indices by 1, to make room for an alphabetical header in our list
for (Integer section : sectionToPosition.keySet()) {
sectionToOffset.put(section, i);
usedSectionNumbers[i] = section;
i++;
}
// use offset to map the alphabet sections to their actual indicies in
// the list
for (Integer section : sectionToPosition.keySet()) {
sectionToPosition.put(section, sectionToPosition.get(section) + sectionToOffset.get(section));
}
if (showSelection) {
initializeSelection();
}
selectedContacts = 0;
}
private void initializeSelection() {
int position = mCursor.getPosition();
if (mCursor.moveToFirst()) {
do {
String id = mCursor.getString(mCursor.getColumnIndex("_id"));
hmSelected.put(id, false);
} while (mCursor.moveToNext());
}
mCursor.moveToPosition(position);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
super.bindView(view, context, cursor);
String name = cursor.getString(cursor.getColumnIndex(AppContacts.CLS.CONTACT_NAME));
String status = cursor.getString(cursor.getColumnIndex(AppProfiles.CLS.STATUS));
if (status == null || status.length() == 0) {
int appUser = cursor.getInt(cursor.getColumnIndex(AppContactsData.CLS.CONTACT_APP_USER));
if (appUser == AppContacts.APP_USER)
status = appStatus;
else
status = inviteStatus;
}
String id = cursor.getString(cursor.getColumnIndex("_id"));
view.setTag(id);
TextView tv = (TextView) view.findViewById(R.id.id_tv_ContactName);
tv.setText(name);
tv = (TextView) view.findViewById(R.id.id_tv_ContactStatus);
tv.setText(status);
CheckBox cb = (CheckBox) view.findViewById(R.id.id_cb_ContactSelected);
if (showSelection) {
// registerForClickListner(cb);
if (cb.getVisibility() != View.VISIBLE)
cb.setVisibility(View.VISIBLE);
boolean checked = hmSelected.get(id) == null ? false : hmSelected.get(id);
if (checked) {
cb.setChecked(true);
} else {
cb.setChecked(false);
}
} else {
if (cb.getVisibility() != View.GONE)
cb.setVisibility(View.GONE);
}
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
LayoutInflater inflator = LayoutInflater.from(context);
View view = inflator.inflate(R.layout.view_contact_row, null);
return view;
}
@Override
public int getCount() {
if (super.getCount() != 0) {
return super.getCount() + usedSectionNumbers.length;
}
return 0;
}
@Override
public Object getItem(int position) {
if (getItemViewType(position) == TYPE_NORMAL) {// we define this
return super.getItem(position - sectionToOffset.get(getSectionForPosition(position)) - 1);
}
return null;
}
@Override
public int getPositionForSection(int section) {
if (!sectionToOffset.containsKey(section)) {
int i = 0;
int maxLength = usedSectionNumbers.length;
while (i < maxLength && section > usedSectionNumbers[i]) {
i++;
}
if (i == maxLength)
return getCount(); // the given section is past all our data
return indexer.getPositionForSection(usedSectionNumbers[i]) + sectionToOffset.get(usedSectionNumbers[i]);
}
return indexer.getPositionForSection(section) + sectionToOffset.get(section);
}
@Override
public int getSectionForPosition(int position) {
int i = 0;
int maxLength = usedSectionNumbers.length;
// linear scan over the used alphabetical sections' positions
// to find where the given section fits in
while (i < maxLength && position >= sectionToPosition.get(usedSectionNumbers[i])) {
i++;
}
return usedSectionNumbers[i - 1];
}
@Override
public Object[] getSections() {
return indexer.getSections();
}
// nothing much to this: headers have positions that the sectionIndexer
// manages.
@Override
public int getItemViewType(int position) {
if (position == getPositionForSection(getSectionForPosition(position))) {
return TYPE_HEADER;
}
return TYPE_NORMAL;
}
@Override
public int getViewTypeCount() {
return TYPE_COUNT;
}
// return the header view, if it's in a section header position
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final int type = getItemViewType(position);
if (type == TYPE_HEADER) {
if (convertView == null) {
convertView = LayoutInflater.from(invokerContext).inflate(R.layout.view_list_header, parent, false);
}
((TextView) convertView.findViewById(R.id.id_tv_ListHeader)).setText((String) getSections()[getSectionForPosition(position)]);
return convertView;
}
return super.getView(position - sectionToOffset.get(getSectionForPosition(position)) - 1, convertView, parent);
}
// these two methods just disable the headers
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
if (getItemViewType(position) == TYPE_HEADER) {
return false;
}
return true;
}
public void selectAll() {
Set<String> set = hmSelected.keySet();
Iterator<String> iterator = set.iterator();
while (iterator.hasNext()) {
String id = iterator.next();
hmSelected.put(id, true);
}
}
}
這裏是我設置適配器：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.frag_all_contacts, null);
String query = "SELECT * FROM " + AppContactsData.TABLE_CONTACT_DATA + " LEFT JOIN " + AppContacts.TABLE_CONTACT_NAMES + " ON "
+ AppContactsData.CLS.CONTACT_ID + "=" + AppContacts.CLS.CONTACT_ID + " LEFT JOIN " + AppProfiles.TABLE_PROFILES + " ON "
+ AppProfiles.CLS.USER_NUMBER + "=" + AppContactsData.CLS.CONTACT_E164NUMBER + " where " + AppContactsData.CLS.CONTACT_ID
+ "!=0";
query = query + " ORDER BY " + AppContacts.CLS.CONTACT_NAME + " collate nocase";
cursor = DBHelper.getInstance().executeRawQuery(query);
ListView lv = (ListView) view.findViewById(R.id.id_lv_AllContacts);
adapter = new AllContactsAdapter(getActivity(), cursor, R.layout.view_contact, showSelection);
listview.setAdapter(adapter);
現在發生了什麼？查詢似乎很好，你是否按照alfabetical的順序檢索數據？ – ImAtWar
聯繫人不按字母順序顯示。 –