1 /*
2  * Copyright (C) 2015 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.packageinstaller.permission.utils;
18 
19 import android.Manifest;
20 import android.content.Context;
21 import android.content.Intent;
22 import android.content.pm.ApplicationInfo;
23 import android.content.pm.PackageManager;
24 import android.content.pm.ResolveInfo;
25 import android.content.res.Resources;
26 import android.content.res.Resources.Theme;
27 import android.graphics.drawable.Drawable;
28 import android.util.ArraySet;
29 import android.util.Log;
30 import android.util.TypedValue;
31 
32 import com.android.packageinstaller.permission.model.AppPermissionGroup;
33 import com.android.packageinstaller.permission.model.AppPermissions;
34 import com.android.packageinstaller.permission.model.PermissionApps.PermissionApp;
35 
36 import java.util.List;
37 
38 public final class Utils {
39 
40     private static final String LOG_TAG = "Utils";
41 
42     public static final String OS_PKG = "android";
43 
44     public static final String[] MODERN_PERMISSION_GROUPS = {
45             Manifest.permission_group.CALENDAR,
46             Manifest.permission_group.CAMERA,
47             Manifest.permission_group.CONTACTS,
48             Manifest.permission_group.LOCATION,
49             Manifest.permission_group.SENSORS,
50             Manifest.permission_group.SMS,
51             Manifest.permission_group.PHONE,
52             Manifest.permission_group.MICROPHONE,
53             Manifest.permission_group.STORAGE
54     };
55 
56     private static final Intent LAUNCHER_INTENT = new Intent(Intent.ACTION_MAIN, null)
57                             .addCategory(Intent.CATEGORY_LAUNCHER);
58 
Utils()59     private Utils() {
60         /* do nothing - hide constructor */
61     }
62 
loadDrawable(PackageManager pm, String pkg, int resId)63     public static Drawable loadDrawable(PackageManager pm, String pkg, int resId) {
64         try {
65             return pm.getResourcesForApplication(pkg).getDrawable(resId, null);
66         } catch (Resources.NotFoundException | PackageManager.NameNotFoundException e) {
67             Log.d(LOG_TAG, "Couldn't get resource", e);
68             return null;
69         }
70     }
71 
isModernPermissionGroup(String name)72     public static boolean isModernPermissionGroup(String name) {
73         for (String modernGroup : MODERN_PERMISSION_GROUPS) {
74             if (modernGroup.equals(name)) {
75                 return true;
76             }
77         }
78         return false;
79     }
80 
shouldShowPermission(AppPermissionGroup group, String packageName)81     public static boolean shouldShowPermission(AppPermissionGroup group, String packageName) {
82         // We currently will not show permissions fixed by the system.
83         // which is what the system does for system components.
84         if (group.isSystemFixed() && !LocationUtils.isLocationGroupAndProvider(
85                 group.getName(), packageName)) {
86             return false;
87         }
88 
89         final boolean isPlatformPermission = group.getDeclaringPackage().equals(OS_PKG);
90         // Show legacy permissions only if the user chose that.
91         if (isPlatformPermission
92                 && !Utils.isModernPermissionGroup(group.getName())) {
93             return false;
94         }
95         return true;
96     }
97 
shouldShowPermission(PermissionApp app)98     public static boolean shouldShowPermission(PermissionApp app) {
99         // We currently will not show permissions fixed by the system
100         // which is what the system does for system components.
101         if (app.isSystemFixed() && !LocationUtils.isLocationGroupAndProvider(
102                 app.getPermissionGroup().getName(), app.getPackageName())) {
103             return false;
104         }
105 
106         return true;
107     }
108 
applyTint(Context context, Drawable icon, int attr)109     public static Drawable applyTint(Context context, Drawable icon, int attr) {
110         Theme theme = context.getTheme();
111         TypedValue typedValue = new TypedValue();
112         theme.resolveAttribute(attr, typedValue, true);
113         icon = icon.mutate();
114         icon.setTint(context.getColor(typedValue.resourceId));
115         return icon;
116     }
117 
applyTint(Context context, int iconResId, int attr)118     public static Drawable applyTint(Context context, int iconResId, int attr) {
119         return applyTint(context, context.getDrawable(iconResId), attr);
120     }
121 
getLauncherPackages(Context context)122     public static ArraySet<String> getLauncherPackages(Context context) {
123         ArraySet<String> launcherPkgs = new ArraySet<>();
124         for (ResolveInfo info :
125             context.getPackageManager().queryIntentActivities(LAUNCHER_INTENT, 0)) {
126             launcherPkgs.add(info.activityInfo.packageName);
127         }
128 
129         return launcherPkgs;
130     }
131 
getAllInstalledApplications(Context context)132     public static List<ApplicationInfo> getAllInstalledApplications(Context context) {
133         return context.getPackageManager().getInstalledApplications(0);
134     }
135 
isSystem(PermissionApp app, ArraySet<String> launcherPkgs)136     public static boolean isSystem(PermissionApp app, ArraySet<String> launcherPkgs) {
137         return isSystem(app.getAppInfo(), launcherPkgs);
138     }
139 
isSystem(AppPermissions app, ArraySet<String> launcherPkgs)140     public static boolean isSystem(AppPermissions app, ArraySet<String> launcherPkgs) {
141         return isSystem(app.getPackageInfo().applicationInfo, launcherPkgs);
142     }
143 
isSystem(ApplicationInfo info, ArraySet<String> launcherPkgs)144     public static boolean isSystem(ApplicationInfo info, ArraySet<String> launcherPkgs) {
145         return info.isSystemApp() && (info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) == 0
146                 && !launcherPkgs.contains(info.packageName);
147     }
148 }
149