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      1 /*
      2  * Copyright (C) 2012 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.location.fused;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.location.Criteria;
     24 import android.os.Handler;
     25 import android.os.Looper;
     26 import android.os.UserHandle;
     27 import android.os.WorkSource;
     28 
     29 import com.android.location.provider.LocationProviderBase;
     30 import com.android.location.provider.ProviderPropertiesUnbundled;
     31 import com.android.location.provider.ProviderRequestUnbundled;
     32 
     33 import java.io.FileDescriptor;
     34 import java.io.PrintWriter;
     35 
     36 class FusedLocationProvider extends LocationProviderBase implements FusionEngine.Callback {
     37     private static final String TAG = "FusedLocationProvider";
     38 
     39     private static ProviderPropertiesUnbundled PROPERTIES = ProviderPropertiesUnbundled.create(
     40             false, false, false, false, true, true, true, Criteria.POWER_LOW,
     41             Criteria.ACCURACY_FINE);
     42 
     43     private final Context mContext;
     44     private final Handler mHandler;
     45     private final FusionEngine mEngine;
     46 
     47     private final BroadcastReceiver mUserSwitchReceiver = new BroadcastReceiver() {
     48         @Override
     49         public void onReceive(Context context, Intent intent) {
     50             String action = intent.getAction();
     51             if (Intent.ACTION_USER_SWITCHED.equals(action)) {
     52                 mEngine.switchUser();
     53             }
     54         }
     55     };
     56 
     57     FusedLocationProvider(Context context) {
     58         super(TAG, PROPERTIES);
     59 
     60         mContext = context;
     61         mHandler = new Handler(Looper.myLooper());
     62         mEngine = new FusionEngine(context, Looper.myLooper(), this);
     63     }
     64 
     65     void init() {
     66         // listen for user change
     67         mContext.registerReceiverAsUser(mUserSwitchReceiver, UserHandle.ALL,
     68                 new IntentFilter(Intent.ACTION_USER_SWITCHED), null, mHandler);
     69     }
     70 
     71     void destroy() {
     72         mContext.unregisterReceiver(mUserSwitchReceiver);
     73         mHandler.post(() -> mEngine.setRequest(null));
     74     }
     75 
     76     @Override
     77     public void onSetRequest(ProviderRequestUnbundled request, WorkSource source) {
     78         mHandler.post(() -> mEngine.setRequest(request));
     79     }
     80 
     81     @Override
     82     public void onDump(FileDescriptor fd, PrintWriter pw, String[] args) {
     83         mEngine.dump(fd, pw, args);
     84     }
     85 }
     86