1 /*
2  * Copyright (C) 2015 Google Inc. All Rights Reserved.
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.example.android.wearable.runtimepermissions;
18 
19 import android.Manifest;
20 import android.content.Intent;
21 import android.content.pm.PackageManager;
22 import android.os.Environment;
23 import android.support.v4.app.ActivityCompat;
24 import android.util.Log;
25 
26 import com.example.android.wearable.runtimepermissions.common.Constants;
27 
28 import com.google.android.gms.common.api.GoogleApiClient;
29 import com.google.android.gms.common.api.PendingResult;
30 import com.google.android.gms.wearable.DataMap;
31 import com.google.android.gms.wearable.MessageApi;
32 import com.google.android.gms.wearable.MessageEvent;
33 import com.google.android.gms.wearable.Wearable;
34 import com.google.android.gms.wearable.WearableListenerService;
35 
36 import java.io.File;
37 import java.util.concurrent.TimeUnit;
38 
39 /**
40  * Handles all incoming requests for phone data (and permissions) from wear devices.
41  */
42 public class IncomingRequestPhoneService extends WearableListenerService {
43 
44     private static final String TAG = "IncomingRequestService";
45 
46     @Override
onCreate()47     public void onCreate() {
48         super.onCreate();
49         Log.d(TAG, "onCreate()");
50     }
51 
52     @Override
onMessageReceived(MessageEvent messageEvent)53     public void onMessageReceived(MessageEvent messageEvent) {
54         super.onMessageReceived(messageEvent);
55         Log.d(TAG, "onMessageReceived(): " + messageEvent);
56 
57         String messagePath = messageEvent.getPath();
58 
59         if (messagePath.equals(Constants.MESSAGE_PATH_PHONE)) {
60 
61             DataMap dataMap = DataMap.fromByteArray(messageEvent.getData());
62             int requestType = dataMap.getInt(Constants.KEY_COMM_TYPE, 0);
63 
64             if (requestType == Constants.COMM_TYPE_REQUEST_PROMPT_PERMISSION) {
65                 promptUserForStoragePermission(messageEvent.getSourceNodeId());
66 
67             } else if (requestType == Constants.COMM_TYPE_REQUEST_DATA) {
68                 respondWithStorageInformation(messageEvent.getSourceNodeId());
69             }
70         }
71     }
72 
promptUserForStoragePermission(String nodeId)73     private void promptUserForStoragePermission(String nodeId) {
74         boolean storagePermissionApproved =
75                 ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE)
76                         == PackageManager.PERMISSION_GRANTED;
77 
78         if (storagePermissionApproved) {
79             DataMap dataMap = new DataMap();
80             dataMap.putInt(Constants.KEY_COMM_TYPE,
81                     Constants.COMM_TYPE_RESPONSE_USER_APPROVED_PERMISSION);
82             sendMessage(nodeId, dataMap);
83         } else {
84             // Launch Phone Activity to grant storage permissions.
85             Intent startIntent = new Intent(this, PhonePermissionRequestActivity.class);
86             startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
87 
88             /* This extra is included to alert MainPhoneActivity to send back the permission
89              * results after the user has made their decision in PhonePermissionRequestActivity
90              * and it finishes.
91              */
92             startIntent.putExtra(MainPhoneActivity.EXTRA_PROMPT_PERMISSION_FROM_WEAR, true);
93             startActivity(startIntent);
94         }
95     }
96 
respondWithStorageInformation(String nodeId)97     private void respondWithStorageInformation(String nodeId) {
98 
99         boolean storagePermissionApproved =
100                 ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE)
101                         == PackageManager.PERMISSION_GRANTED;
102 
103         if (!storagePermissionApproved) {
104             DataMap dataMap = new DataMap();
105             dataMap.putInt(Constants.KEY_COMM_TYPE,
106                     Constants.COMM_TYPE_RESPONSE_PERMISSION_REQUIRED);
107             sendMessage(nodeId, dataMap);
108         } else {
109             /* To keep the sample simple, we are only displaying the top level list of directories.
110              * Otherwise, it will return a message that the media wasn't available.
111              */
112             StringBuilder stringBuilder = new StringBuilder();
113 
114             if (isExternalStorageReadable()) {
115                 File externalStorageDirectory = Environment.getExternalStorageDirectory();
116                 String[] fileList = externalStorageDirectory.list();
117 
118                 if (fileList.length > 0) {
119                     stringBuilder.append("List of directories on phone:\n");
120                     for (String file : fileList) {
121                         stringBuilder.append(" - " + file + "\n");
122                     }
123                 } else {
124                     stringBuilder.append("No files in external storage.");
125                 }
126             } else {
127                 stringBuilder.append("No external media is available.");
128             }
129 
130             // Send valid results
131             DataMap dataMap = new DataMap();
132             dataMap.putInt(Constants.KEY_COMM_TYPE,
133                     Constants.COMM_TYPE_RESPONSE_DATA);
134             dataMap.putString(Constants.KEY_PAYLOAD, stringBuilder.toString());
135             sendMessage(nodeId, dataMap);
136 
137         }
138     }
139 
sendMessage(String nodeId, DataMap dataMap)140     private void sendMessage(String nodeId, DataMap dataMap) {
141         Log.d(TAG, "sendMessage() Node: " + nodeId);
142 
143         GoogleApiClient client = new GoogleApiClient.Builder(this)
144                 .addApi(Wearable.API)
145                 .build();
146         client.blockingConnect(Constants.CONNECTION_TIME_OUT_MS, TimeUnit.MILLISECONDS);
147 
148 
149         PendingResult<MessageApi.SendMessageResult> pendingMessageResult =
150                 Wearable.MessageApi.sendMessage(
151                         client,
152                         nodeId,
153                         Constants.MESSAGE_PATH_WEAR,
154                         dataMap.toByteArray());
155 
156         MessageApi.SendMessageResult sendMessageResult =
157                 pendingMessageResult.await(
158                         Constants.CONNECTION_TIME_OUT_MS,
159                         TimeUnit.MILLISECONDS);
160 
161         if (!sendMessageResult.getStatus().isSuccess()) {
162             Log.d(TAG, "Sending message failed, status: "
163                     + sendMessageResult.getStatus());
164         } else {
165             Log.d(TAG, "Message sent successfully");
166         }
167         client.disconnect();
168     }
169 
isExternalStorageReadable()170     private boolean isExternalStorageReadable() {
171         String state = Environment.getExternalStorageState();
172 
173         return Environment.MEDIA_MOUNTED.equals(state)
174                 || Environment.MEDIA_MOUNTED_READ_ONLY.equals(state);
175     }
176 }