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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3.util;
import android.app.AppOpsManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ResolveInfo;
import android.os.Build;
import android.text.TextUtils;
import com.android.launcher3.Utilities;
import java.util.ArrayList;
/**
* Utility methods using package manager
*/
public class PackageManagerHelper {
private static final int FLAG_SUSPENDED = 1<<30;
private static final String LIVE_WALLPAPER_PICKER_PKG = "com.android.wallpaper.livepicker";
/**
* Returns true if the app can possibly be on the SDCard. This is just a workaround and doesn't
* guarantee that the app is on SD card.
*/
public static boolean isAppOnSdcard(PackageManager pm, String packageName) {
return isAppEnabled(pm, packageName, PackageManager.GET_UNINSTALLED_PACKAGES);
}
public static boolean isAppEnabled(PackageManager pm, String packageName) {
return isAppEnabled(pm, packageName, 0);
}
public static boolean isAppEnabled(PackageManager pm, String packageName, int flags) {
try {
ApplicationInfo info = pm.getApplicationInfo(packageName, flags);
return info != null && info.enabled;
} catch (PackageManager.NameNotFoundException e) {
return false;
}
}
public static boolean isAppSuspended(PackageManager pm, String packageName) {
try {
ApplicationInfo info = pm.getApplicationInfo(packageName, 0);
return info != null && isAppSuspended(info);
} catch (PackageManager.NameNotFoundException e) {
return false;
}
}
public static boolean isAppSuspended(ApplicationInfo info) {
// The value of FLAG_SUSPENDED was reused by a hidden constant
// ApplicationInfo.FLAG_PRIVILEGED prior to N, so only check for suspended flag on N
// or later.
if (Utilities.isNycOrAbove()) {
return (info.flags & FLAG_SUSPENDED) != 0;
} else {
return false;
}
}
/**
* Returns the package for a wallpaper picker system app giving preference to a app which
* is not as image picker.
*/
public static String getWallpaperPickerPackage(PackageManager pm) {
ArrayList<String> excludePackages = new ArrayList<>();
// Exclude packages which contain an image picker
for (ResolveInfo info : pm.queryIntentActivities(
new Intent(Intent.ACTION_GET_CONTENT).setType("image/*"), 0)) {
excludePackages.add(info.activityInfo.packageName);
}
excludePackages.add(LIVE_WALLPAPER_PICKER_PKG);
for (ResolveInfo info : pm.queryIntentActivities(
new Intent(Intent.ACTION_SET_WALLPAPER), 0)) {
if (!excludePackages.contains(info.activityInfo.packageName) &&
(info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
return info.activityInfo.packageName;
}
}
return excludePackages.get(0);
}
/**
* Returns true if {@param srcPackage} has the permission required to start the activity from
* {@param intent}. If {@param srcPackage} is null, then the activity should not need
* any permissions
*/
public static boolean hasPermissionForActivity(Context context, Intent intent,
String srcPackage) {
PackageManager pm = context.getPackageManager();
ResolveInfo target = pm.resolveActivity(intent, 0);
if (target == null) {
// Not a valid target
return false;
}
if (TextUtils.isEmpty(target.activityInfo.permission)) {
// No permission is needed
return true;
}
if (TextUtils.isEmpty(srcPackage)) {
// The activity requires some permission but there is no source.
return false;
}
// Source does not have sufficient permissions.
if(pm.checkPermission(target.activityInfo.permission, srcPackage) !=
PackageManager.PERMISSION_GRANTED) {
return false;
}
if (!Utilities.ATLEAST_MARSHMALLOW) {
// These checks are sufficient for below M devices.
return true;
}
// On M and above also check AppOpsManager for compatibility mode permissions.
if (TextUtils.isEmpty(AppOpsManager.permissionToOp(target.activityInfo.permission))) {
// There is no app-op for this permission, which could have been disabled.
return true;
}
// There is no direct way to check if the app-op is allowed for a particular app. Since
// app-op is only enabled for apps running in compatibility mode, simply block such apps.
try {
return pm.getApplicationInfo(srcPackage, 0).targetSdkVersion >= Build.VERSION_CODES.M;
} catch (NameNotFoundException e) { }
return false;
}
}
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