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.Context; 21 import android.content.pm.ApplicationInfo; 22 import android.content.pm.PackageInfo; 23 import android.content.pm.PackageManager; 24 import android.content.pm.ResolveInfo; 25 import android.provider.Settings; 26 import android.text.TextUtils; 27 28 import com.android.internal.logging.nano.MetricsProto; 29 import com.android.settings.R; 30 import com.android.settings.Utils; 31 import com.android.settingslib.applications.DefaultAppInfo; 32 import com.android.settingslib.widget.CandidateInfo; 33 34 import java.util.ArrayList; 35 import java.util.List; 36 37 public class DefaultEmergencyPicker extends DefaultAppPickerFragment { 38 39 @Override getMetricsCategory()40 public int getMetricsCategory() { 41 return MetricsProto.MetricsEvent.DEFAULT_EMERGENCY_APP_PICKER; 42 } 43 44 @Override getPreferenceScreenResId()45 protected int getPreferenceScreenResId() { 46 return R.xml.default_emergency_settings; 47 } 48 49 @Override getCandidates()50 protected List<DefaultAppInfo> getCandidates() { 51 final List<DefaultAppInfo> candidates = new ArrayList<>(); 52 final List<ResolveInfo> infos = mPm.getPackageManager().queryIntentActivities( 53 DefaultEmergencyPreferenceController.QUERY_INTENT, 0); 54 PackageInfo bestMatch = null; 55 final Context context = getContext(); 56 for (ResolveInfo info : infos) { 57 try { 58 final PackageInfo packageInfo = 59 mPm.getPackageManager().getPackageInfo(info.activityInfo.packageName, 0); 60 final ApplicationInfo appInfo = packageInfo.applicationInfo; 61 candidates.add(new DefaultAppInfo(context, mPm, appInfo)); 62 // Get earliest installed system app. 63 if (isSystemApp(appInfo) && (bestMatch == null || 64 bestMatch.firstInstallTime > packageInfo.firstInstallTime)) { 65 bestMatch = packageInfo; 66 } 67 } catch (PackageManager.NameNotFoundException e) { 68 // Skip unknown packages. 69 } 70 if (bestMatch != null) { 71 final String defaultKey = getDefaultKey(); 72 if (TextUtils.isEmpty(defaultKey)) { 73 setDefaultKey(bestMatch.packageName); 74 } 75 } 76 } 77 return candidates; 78 } 79 80 @Override getConfirmationMessage(CandidateInfo info)81 protected String getConfirmationMessage(CandidateInfo info) { 82 return Utils.isPackageDirectBootAware(getContext(), info.getKey()) ? null 83 : getContext().getString(R.string.direct_boot_unaware_dialog_message); 84 } 85 86 @Override getDefaultKey()87 protected String getDefaultKey() { 88 return Settings.Secure.getString(getContext().getContentResolver(), 89 Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION); 90 } 91 92 @Override setDefaultKey(String key)93 protected boolean setDefaultKey(String key) { 94 final ContentResolver contentResolver = getContext().getContentResolver(); 95 final String previousValue = Settings.Secure.getString(contentResolver, 96 Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION); 97 98 if (!TextUtils.isEmpty(key) && !TextUtils.equals(key, previousValue)) { 99 Settings.Secure.putString(contentResolver, 100 Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION, 101 key); 102 return true; 103 } 104 return false; 105 } 106 isSystemApp(ApplicationInfo info)107 private boolean isSystemApp(ApplicationInfo info) { 108 return info != null && (info.flags & ApplicationInfo.FLAG_SYSTEM) != 0; 109 } 110 } 111