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      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.packageinstaller.handheld;
     18 
     19 import android.app.AlertDialog;
     20 import android.app.Dialog;
     21 import android.app.DialogFragment;
     22 import android.content.DialogInterface;
     23 import android.content.pm.ApplicationInfo;
     24 import android.content.pm.PackageManager;
     25 import android.content.pm.UserInfo;
     26 import android.os.Bundle;
     27 import android.os.UserManager;
     28 
     29 import com.android.packageinstaller.R;
     30 import com.android.packageinstaller.UninstallerActivity;
     31 
     32 public class UninstallAlertDialogFragment extends DialogFragment implements
     33         DialogInterface.OnClickListener {
     34 
     35     @Override
     36     public Dialog onCreateDialog(Bundle savedInstanceState) {
     37         final PackageManager pm = getActivity().getPackageManager();
     38         final UninstallerActivity.DialogInfo dialogInfo =
     39                 ((UninstallerActivity) getActivity()).getDialogInfo();
     40         final CharSequence appLabel = dialogInfo.appInfo.loadLabel(pm);
     41 
     42         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(getActivity());
     43         StringBuilder messageBuilder = new StringBuilder();
     44 
     45         // If the Activity label differs from the App label, then make sure the user
     46         // knows the Activity belongs to the App being uninstalled.
     47         if (dialogInfo.activityInfo != null) {
     48             final CharSequence activityLabel = dialogInfo.activityInfo.loadLabel(pm);
     49             if (!activityLabel.equals(appLabel)) {
     50                 messageBuilder.append(
     51                         getString(R.string.uninstall_activity_text, activityLabel));
     52                 messageBuilder.append(" ").append(appLabel).append(".\n\n");
     53             }
     54         }
     55 
     56         final boolean isUpdate =
     57                 ((dialogInfo.appInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0);
     58         UserManager userManager = UserManager.get(getActivity());
     59         if (isUpdate) {
     60             if (isSingleUser(userManager)) {
     61                 messageBuilder.append(getString(R.string.uninstall_update_text));
     62             } else {
     63                 messageBuilder.append(getString(R.string.uninstall_update_text_multiuser));
     64             }
     65         } else {
     66             if (dialogInfo.allUsers && !isSingleUser(userManager)) {
     67                 messageBuilder.append(getString(R.string.uninstall_application_text_all_users));
     68             } else if (!dialogInfo.user.equals(android.os.Process.myUserHandle())) {
     69                 UserInfo userInfo = userManager.getUserInfo(dialogInfo.user.getIdentifier());
     70                 messageBuilder.append(
     71                         getString(R.string.uninstall_application_text_user, userInfo.name));
     72             } else {
     73                 messageBuilder.append(getString(R.string.uninstall_application_text));
     74             }
     75         }
     76 
     77         dialogBuilder.setTitle(appLabel);
     78         dialogBuilder.setIcon(dialogInfo.appInfo.loadIcon(pm));
     79         dialogBuilder.setPositiveButton(android.R.string.ok, this);
     80         dialogBuilder.setNegativeButton(android.R.string.cancel, this);
     81         dialogBuilder.setMessage(messageBuilder.toString());
     82         return dialogBuilder.create();
     83     }
     84 
     85     @Override
     86     public void onClick(DialogInterface dialog, int which) {
     87         if (which == Dialog.BUTTON_POSITIVE) {
     88             ((UninstallerActivity) getActivity()).startUninstallProgress();
     89         } else {
     90             ((UninstallerActivity) getActivity()).dispatchAborted();
     91         }
     92     }
     93 
     94     @Override
     95     public void onDismiss(DialogInterface dialog) {
     96         super.onDismiss(dialog);
     97         if (isAdded()) {
     98             getActivity().finish();
     99         }
    100     }
    101 
    102     /**
    103      * Returns whether there is only one user on this device, not including
    104      * the system-only user.
    105      */
    106     private boolean isSingleUser(UserManager userManager) {
    107         final int userCount = userManager.getUserCount();
    108         return userCount == 1
    109                 || (UserManager.isSplitSystemUser() && userCount == 2);
    110     }
    111 }
    112