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      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
     47     public void onCreate() {
     48         super.onCreate();
     49         Log.d(TAG, "onCreate()");
     50     }
     51 
     52     @Override
     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 
     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 
     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 
    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 
    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 }