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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.mtp;
     18 
     19 import android.annotation.NonNull;
     20 import android.app.Notification;
     21 import android.app.NotificationChannel;
     22 import android.app.NotificationManager;
     23 import android.content.ComponentName;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import com.android.internal.annotations.VisibleForTesting;
     27 import com.android.internal.util.Preconditions;
     28 
     29 /**
     30  * Sends intent to MtpDocumentsService.
     31  */
     32 class ServiceIntentSender {
     33     private final static String CHANNEL_ID = "device_notification_channel";
     34     private final Context mContext;
     35 
     36     ServiceIntentSender(Context context) {
     37         mContext = context;
     38 
     39         // Create notification channel.
     40         final NotificationChannel mChannel = new NotificationChannel(
     41                 CHANNEL_ID,
     42                 context.getResources().getString(
     43                         com.android.internal.R.string.default_notification_channel_label),
     44                 NotificationManager.IMPORTANCE_LOW);
     45         final NotificationManager notificationManager =
     46                 (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
     47         notificationManager.createNotificationChannel(mChannel);
     48     }
     49 
     50     @VisibleForTesting
     51     protected ServiceIntentSender() {
     52         mContext = null;
     53     }
     54 
     55     /**
     56      * Notify the change of opened device set.
     57      * @param records List of opened devices. Can be empty.
     58      */
     59     void sendUpdateNotificationIntent(@NonNull MtpDeviceRecord[] records) {
     60         Preconditions.checkNotNull(records);
     61         final Intent intent = new Intent(MtpDocumentsService.ACTION_UPDATE_NOTIFICATION);
     62         intent.setComponent(new ComponentName(mContext, MtpDocumentsService.class));
     63         if (records.length != 0) {
     64             final int[] ids = new int[records.length];
     65             final Notification[] notifications = new Notification[records.length];
     66             for (int i = 0; i < records.length; i++) {
     67                 ids[i] = records[i].deviceId;
     68                 notifications[i] = createNotification(mContext, records[i]);
     69             }
     70             intent.putExtra(MtpDocumentsService.EXTRA_DEVICE_IDS, ids);
     71             intent.putExtra(MtpDocumentsService.EXTRA_DEVICE_NOTIFICATIONS, notifications);
     72             mContext.startForegroundService(intent);
     73         } else {
     74             mContext.startService(intent);
     75         }
     76     }
     77 
     78     private static Notification createNotification(Context context, MtpDeviceRecord device) {
     79         final String title = context.getResources().getString(
     80                 R.string.accessing_notification_title,
     81                 device.name);
     82         return new Notification.Builder(context, CHANNEL_ID)
     83                 .setLocalOnly(true)
     84                 .setContentTitle(title)
     85                 .setSmallIcon(com.android.internal.R.drawable.stat_sys_data_usb)
     86                 .setCategory(Notification.CATEGORY_SYSTEM)
     87                 .setFlag(Notification.FLAG_NO_CLEAR, true)
     88                 .build();
     89     }
     90 }
     91