1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settings.applications.defaultapps; 18 19 import android.content.ContentResolver; 20 import android.content.pm.ApplicationInfo; 21 import android.content.pm.PackageInfo; 22 import android.content.pm.PackageManager; 23 import android.content.pm.ResolveInfo; 24 import android.provider.Settings; 25 import android.text.TextUtils; 26 27 import com.android.internal.logging.nano.MetricsProto; 28 import com.android.settings.R; 29 import com.android.settings.Utils; 30 31 import java.util.ArrayList; 32 import java.util.List; 33 34 public class DefaultEmergencyPicker extends DefaultAppPickerFragment { 35 36 @Override getMetricsCategory()37 public int getMetricsCategory() { 38 return MetricsProto.MetricsEvent.DEFAULT_EMERGENCY_APP_PICKER; 39 } 40 41 @Override getCandidates()42 protected List<DefaultAppInfo> getCandidates() { 43 final List<DefaultAppInfo> candidates = new ArrayList<>(); 44 final List<ResolveInfo> infos = mPm.getPackageManager().queryIntentActivities( 45 DefaultEmergencyPreferenceController.QUERY_INTENT, 0); 46 PackageInfo bestMatch = null; 47 for (ResolveInfo info : infos) { 48 try { 49 final PackageInfo packageInfo = 50 mPm.getPackageManager().getPackageInfo(info.activityInfo.packageName, 0); 51 final ApplicationInfo appInfo = packageInfo.applicationInfo; 52 candidates.add(new DefaultAppInfo(mPm, appInfo)); 53 // Get earliest installed system app. 54 if (isSystemApp(appInfo) && (bestMatch == null || 55 bestMatch.firstInstallTime > packageInfo.firstInstallTime)) { 56 bestMatch = packageInfo; 57 } 58 } catch (PackageManager.NameNotFoundException e) { 59 // Skip unknown packages. 60 } 61 if (bestMatch != null) { 62 final String defaultKey = getDefaultKey(); 63 if (TextUtils.isEmpty(defaultKey)) { 64 setDefaultKey(bestMatch.packageName); 65 } 66 } 67 } 68 return candidates; 69 } 70 71 @Override getConfirmationMessage(CandidateInfo info)72 protected String getConfirmationMessage(CandidateInfo info) { 73 return Utils.isPackageDirectBootAware(getContext(), info.getKey()) ? null 74 : getContext().getString(R.string.direct_boot_unaware_dialog_message); 75 } 76 77 @Override getDefaultKey()78 protected String getDefaultKey() { 79 return Settings.Secure.getString(getContext().getContentResolver(), 80 Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION); 81 } 82 83 @Override setDefaultKey(String key)84 protected boolean setDefaultKey(String key) { 85 final ContentResolver contentResolver = getContext().getContentResolver(); 86 final String previousValue = Settings.Secure.getString(contentResolver, 87 Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION); 88 89 if (!TextUtils.isEmpty(key) && !TextUtils.equals(key, previousValue)) { 90 Settings.Secure.putString(contentResolver, 91 Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION, 92 key); 93 return true; 94 } 95 return false; 96 } 97 isSystemApp(ApplicationInfo info)98 private boolean isSystemApp(ApplicationInfo info) { 99 return info != null && (info.flags & ApplicationInfo.FLAG_SYSTEM) != 0; 100 } 101 } 102