1 /* 2 * Copyright (C) 2016 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.launcher3.util; 18 19 import android.app.AppOpsManager; 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.PackageManager.NameNotFoundException; 25 import android.content.pm.ResolveInfo; 26 import android.os.Build; 27 import android.text.TextUtils; 28 29 import com.android.launcher3.Utilities; 30 31 /** 32 * Utility methods using package manager 33 */ 34 public class PackageManagerHelper { 35 36 private static final int FLAG_SUSPENDED = 1<<30; 37 38 /** 39 * Returns true if the app can possibly be on the SDCard. This is just a workaround and doesn't 40 * guarantee that the app is on SD card. 41 */ isAppOnSdcard(PackageManager pm, String packageName)42 public static boolean isAppOnSdcard(PackageManager pm, String packageName) { 43 return isAppEnabled(pm, packageName, PackageManager.GET_UNINSTALLED_PACKAGES); 44 } 45 isAppEnabled(PackageManager pm, String packageName)46 public static boolean isAppEnabled(PackageManager pm, String packageName) { 47 return isAppEnabled(pm, packageName, 0); 48 } 49 isAppEnabled(PackageManager pm, String packageName, int flags)50 public static boolean isAppEnabled(PackageManager pm, String packageName, int flags) { 51 try { 52 ApplicationInfo info = pm.getApplicationInfo(packageName, flags); 53 return info != null && info.enabled; 54 } catch (PackageManager.NameNotFoundException e) { 55 return false; 56 } 57 } 58 isAppSuspended(PackageManager pm, String packageName)59 public static boolean isAppSuspended(PackageManager pm, String packageName) { 60 try { 61 ApplicationInfo info = pm.getApplicationInfo(packageName, 0); 62 return info != null && isAppSuspended(info); 63 } catch (PackageManager.NameNotFoundException e) { 64 return false; 65 } 66 } 67 isAppSuspended(ApplicationInfo info)68 public static boolean isAppSuspended(ApplicationInfo info) { 69 // The value of FLAG_SUSPENDED was reused by a hidden constant 70 // ApplicationInfo.FLAG_PRIVILEGED prior to N, so only check for suspended flag on N 71 // or later. 72 if (Utilities.ATLEAST_N) { 73 return (info.flags & FLAG_SUSPENDED) != 0; 74 } else { 75 return false; 76 } 77 } 78 79 /** 80 * Returns true if {@param srcPackage} has the permission required to start the activity from 81 * {@param intent}. If {@param srcPackage} is null, then the activity should not need 82 * any permissions 83 */ hasPermissionForActivity(Context context, Intent intent, String srcPackage)84 public static boolean hasPermissionForActivity(Context context, Intent intent, 85 String srcPackage) { 86 PackageManager pm = context.getPackageManager(); 87 ResolveInfo target = pm.resolveActivity(intent, 0); 88 if (target == null) { 89 // Not a valid target 90 return false; 91 } 92 if (TextUtils.isEmpty(target.activityInfo.permission)) { 93 // No permission is needed 94 return true; 95 } 96 if (TextUtils.isEmpty(srcPackage)) { 97 // The activity requires some permission but there is no source. 98 return false; 99 } 100 101 // Source does not have sufficient permissions. 102 if(pm.checkPermission(target.activityInfo.permission, srcPackage) != 103 PackageManager.PERMISSION_GRANTED) { 104 return false; 105 } 106 107 if (!Utilities.ATLEAST_MARSHMALLOW) { 108 // These checks are sufficient for below M devices. 109 return true; 110 } 111 112 // On M and above also check AppOpsManager for compatibility mode permissions. 113 if (TextUtils.isEmpty(AppOpsManager.permissionToOp(target.activityInfo.permission))) { 114 // There is no app-op for this permission, which could have been disabled. 115 return true; 116 } 117 118 // There is no direct way to check if the app-op is allowed for a particular app. Since 119 // app-op is only enabled for apps running in compatibility mode, simply block such apps. 120 121 try { 122 return pm.getApplicationInfo(srcPackage, 0).targetSdkVersion >= Build.VERSION_CODES.M; 123 } catch (NameNotFoundException e) { } 124 125 return false; 126 } 127 } 128