128 lines
4.2 KiB
Java
128 lines
4.2 KiB
Java
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.latin;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.database.ContentObserver;
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import android.database.Cursor;
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import android.os.AsyncTask;
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import android.os.SystemClock;
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import android.provider.ContactsContract.Contacts;
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public class ContactsDictionary extends ExpandableDictionary {
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private static final String[] PROJECTION = {
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Contacts._ID,
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Contacts.DISPLAY_NAME,
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};
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private static final int INDEX_NAME = 1;
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private ContentObserver mObserver;
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private long mLastLoadedContacts;
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public ContactsDictionary(Context context) {
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super(context);
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// Perform a managed query. The Activity will handle closing and requerying the cursor
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// when needed.
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ContentResolver cres = context.getContentResolver();
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cres.registerContentObserver(Contacts.CONTENT_URI, true, mObserver = new ContentObserver(null) {
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@Override
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public void onChange(boolean self) {
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setRequiresReload(true);
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}
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});
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loadDictionary();
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}
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public synchronized void close() {
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if (mObserver != null) {
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getContext().getContentResolver().unregisterContentObserver(mObserver);
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mObserver = null;
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}
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super.close();
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}
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@Override
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public void startDictionaryLoadingTaskLocked() {
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long now = SystemClock.uptimeMillis();
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if (mLastLoadedContacts == 0
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|| now - mLastLoadedContacts > 30 * 60 * 1000 /* 30 minutes */) {
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super.startDictionaryLoadingTaskLocked();
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}
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}
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@Override
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public void loadDictionaryAsync() {
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Cursor cursor = getContext().getContentResolver()
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.query(Contacts.CONTENT_URI, PROJECTION, null, null, null);
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if (cursor != null) {
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addWords(cursor);
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}
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mLastLoadedContacts = SystemClock.uptimeMillis();
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}
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private void addWords(Cursor cursor) {
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clearDictionary();
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final int maxWordLength = getMaxWordLength();
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if (cursor.moveToFirst()) {
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while (!cursor.isAfterLast()) {
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String name = cursor.getString(INDEX_NAME);
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if (name != null) {
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int len = name.length();
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// TODO: Better tokenization for non-Latin writing systems
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for (int i = 0; i < len; i++) {
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if (Character.isLetter(name.charAt(i))) {
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int j;
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for (j = i + 1; j < len; j++) {
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char c = name.charAt(j);
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if (!(c == '-' || c == '\'' ||
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Character.isLetter(c))) {
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break;
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}
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}
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String word = name.substring(i, j);
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i = j - 1;
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// Safeguard against adding really long words. Stack
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// may overflow due to recursion
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// Also don't add single letter words, possibly confuses
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// capitalization of i.
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final int wordLen = word.length();
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if (wordLen < maxWordLength && wordLen > 1) {
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super.addWord(word, 128);
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}
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}
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}
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}
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cursor.moveToNext();
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}
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}
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cursor.close();
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}
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}
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