content: /*
   * Copyright (C) 2017 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.server.utils;
  
  import android.content.Context;
  import android.content.Intent;
  import android.content.pm.ResolveInfo;
  import android.util.Log;
  
  public class AppInstallerUtil {
      private static final String LOG_TAG = "AppInstallerUtil";
  
      private static Intent resolveIntent(Context context, Intent i) {
          ResolveInfo result = context.getPackageManager().resolveActivity(i, 0);
          return result != null ? new Intent(i.getAction())
                  .setClassName(result.activityInfo.packageName, result.activityInfo.name) : null;
      }
  
      /**
       * Returns the package name of the app which installed a given packageName, if available.
       */
      public static String getInstallerPackageName(Context context, String packageName) {
          String installerPackageName = null;
          try {
              installerPackageName =
                      context.getPackageManager().getInstallerPackageName(packageName);
          } catch (IllegalArgumentException e) {
              Log.e(LOG_TAG, "Exception while retrieving the package installer of " + packageName, e);
          }
          if (installerPackageName == null) {
              return null;
          }
          return installerPackageName;
      }
  
      /**
       * Returns an intent to launcher the installer for a given package name.
       */
      public static Intent createIntent(Context context, String installerPackageName,
              String packageName) {
          Intent intent = new Intent(Intent.ACTION_SHOW_APP_INFO).setPackage(installerPackageName);
          final Intent result = resolveIntent(context, intent);
          if (result != null) {
              result.putExtra(Intent.EXTRA_PACKAGE_NAME, packageName);
              result.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
              return result;
          }
          return null;
      }
  
      /**
       * Convenience method that looks up the installerPackageName.
       */
      public static Intent createIntent(Context context, String packageName) {
          String installerPackageName = getInstallerPackageName(context, packageName);
          return createIntent(context, installerPackageName, packageName);
      }
  }
  