219 lines
8.4 KiB
Java
219 lines
8.4 KiB
Java
/*
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* Copyright (C) 2016 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.settings.search2;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.ApplicationInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.content.pm.UserInfo;
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import android.net.Uri;
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import android.os.UserHandle;
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import android.os.UserManager;
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import android.provider.Settings;
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import android.text.TextUtils;
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import com.android.internal.logging.nano.MetricsProto;
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import com.android.settings.R;
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import com.android.settings.SettingsActivity;
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import com.android.settings.applications.ManageApplications;
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import com.android.settings.applications.PackageManagerWrapper;
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import com.android.settings.dashboard.SiteMapManager;
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import com.android.settings.overlay.FeatureFactory;
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import com.android.settings.utils.AsyncLoader;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* Search loader for installed apps.
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*/
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public class InstalledAppResultLoader extends AsyncLoader<List<? extends SearchResult>> {
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private static final int NAME_NO_MATCH = -1;
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private static final Intent LAUNCHER_PROBE = new Intent(Intent.ACTION_MAIN)
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.addCategory(Intent.CATEGORY_LAUNCHER);
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private List<String> mBreadcrumb;
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private SiteMapManager mSiteMapManager;
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private final String mQuery;
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private final UserManager mUserManager;
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private final PackageManagerWrapper mPackageManager;
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public InstalledAppResultLoader(Context context, PackageManagerWrapper pmWrapper,
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String query, SiteMapManager mapManager) {
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super(context);
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mSiteMapManager = mapManager;
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mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
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mPackageManager = pmWrapper;
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mQuery = query;
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}
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@Override
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public List<? extends SearchResult> loadInBackground() {
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final List<AppSearchResult> results = new ArrayList<>();
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final PackageManager pm = mPackageManager.getPackageManager();
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for (UserInfo user : getUsersToCount()) {
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final List<ApplicationInfo> apps =
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mPackageManager.getInstalledApplicationsAsUser(
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PackageManager.MATCH_DISABLED_COMPONENTS
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| PackageManager.MATCH_DISABLED_UNTIL_USED_COMPONENTS
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| (user.isAdmin() ? PackageManager.MATCH_ANY_USER : 0),
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user.id);
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for (ApplicationInfo info : apps) {
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if (!shouldIncludeAsCandidate(info, user)) {
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continue;
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}
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final CharSequence label = info.loadLabel(pm);
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final int wordDiff = getWordDifference(label.toString(), mQuery);
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if (wordDiff == NAME_NO_MATCH) {
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continue;
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}
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final Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
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.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
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.setData(Uri.fromParts("package", info.packageName, null))
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.putExtra(SettingsActivity.EXTRA_SOURCE_METRICS_CATEGORY,
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MetricsProto.MetricsEvent.DASHBOARD_SEARCH_RESULTS);
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final AppSearchResult.Builder builder = new AppSearchResult.Builder();
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builder.setAppInfo(info)
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.addTitle(info.loadLabel(pm))
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.addRank(getRank(wordDiff))
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.addBreadcrumbs(getBreadCrumb())
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.addPayload(new IntentPayload(intent));
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results.add(builder.build());
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}
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}
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Collections.sort(results);
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return results;
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}
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private boolean shouldIncludeAsCandidate(ApplicationInfo info, UserInfo user) {
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if ((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0
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|| (info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
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return true;
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}
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final Intent launchIntent = new Intent(LAUNCHER_PROBE)
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.setPackage(info.packageName);
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final List<ResolveInfo> intents = mPackageManager.queryIntentActivitiesAsUser(
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launchIntent,
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PackageManager.MATCH_DISABLED_COMPONENTS
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| PackageManager.MATCH_DIRECT_BOOT_AWARE
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| PackageManager.MATCH_DIRECT_BOOT_UNAWARE,
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user.id);
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return intents != null && intents.size() != 0;
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}
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@Override
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protected void onDiscardResult(List<? extends SearchResult> result) {
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}
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private List<UserInfo> getUsersToCount() {
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return mUserManager.getProfiles(UserHandle.myUserId());
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}
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/**
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* Returns "difference" between appName and query string. appName must contain all
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* characters from query as a prefix to a word, in the same order.
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* If not, returns NAME_NO_MATCH.
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* If they do match, returns an int value representing how different they are,
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* and larger values means they are less similar.
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* <p/>
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* Example:
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* appName: Abcde, query: Abcde, Returns 0
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* appName: Abcde, query: abc, Returns 2
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* appName: Abcde, query: ab, Returns 3
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* appName: Abcde, query: bc, Returns NAME_NO_MATCH
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* appName: Abcde, query: xyz, Returns NAME_NO_MATCH
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* appName: Abc de, query: de, Returns 4
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*/
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private int getWordDifference(String appName, String query) {
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if (TextUtils.isEmpty(appName) || TextUtils.isEmpty(query)) {
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return NAME_NO_MATCH;
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}
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final char[] queryTokens = query.toLowerCase().toCharArray();
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final char[] appTokens = appName.toLowerCase().toCharArray();
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final int appLength = appTokens.length;
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if (queryTokens.length > appLength) {
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return NAME_NO_MATCH;
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}
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int i = 0;
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int j;
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while (i < appLength) {
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j = 0;
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// Currently matching a prefix
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while ((i + j < appLength) && (queryTokens[j] == appTokens[i + j])) {
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// Matched the entire query
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if (++j >= queryTokens.length) {
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// Use the diff in length as a proxy of how close the 2 words match.
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// Value range from 0 to infinity.
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return appLength - queryTokens.length;
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}
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}
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i += j;
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// Remaining string is longer that the query or we have search the whole app name.
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if (queryTokens.length > appLength - i) {
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return NAME_NO_MATCH;
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}
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// This is the first index where app name and query name are different
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// Find the next space in the app name or the end of the app name.
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while ((i < appLength) && (!Character.isWhitespace(appTokens[i++]))) ;
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// Find the start of the next word
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while ((i < appLength) && !(Character.isLetter(appTokens[i])
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|| Character.isDigit(appTokens[i]))) {
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// Increment in body because we cannot guarantee which condition was true
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i++;
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}
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}
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return NAME_NO_MATCH;
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}
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private List<String> getBreadCrumb() {
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if (mBreadcrumb == null || mBreadcrumb.isEmpty()) {
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final Context context = getContext();
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mBreadcrumb = mSiteMapManager.buildBreadCrumb(
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context, ManageApplications.class.getName(),
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context.getString(R.string.applications_settings));
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}
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return mBreadcrumb;
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}
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/**
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* A temporary ranking scheme for installed apps.
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* @param wordDiff difference between query length and app name length.
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* @return the ranking.
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*/
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private int getRank(int wordDiff) {
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if (wordDiff < 6) {
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return 2;
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}
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return 3;
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}
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}
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