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
17package com.android.location.fused;
18
19
20import java.io.FileDescriptor;
21import java.io.PrintWriter;
22
23import com.android.location.provider.LocationProviderBase;
24import com.android.location.provider.ProviderPropertiesUnbundled;
25import com.android.location.provider.ProviderRequestUnbundled;
26
27import android.content.Context;
28import android.location.Criteria;
29import android.location.LocationProvider;
30import android.os.Bundle;
31import android.os.Handler;
32import android.os.Looper;
33import android.os.Message;
34import android.os.WorkSource;
35
36public 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 static final int MSG_ENABLE = 1;
44    private static final int MSG_DISABLE = 2;
45    private static final int MSG_SET_REQUEST = 3;
46
47    private final Context mContext;
48    private final FusionEngine mEngine;
49
50    private static class RequestWrapper {
51        public ProviderRequestUnbundled request;
52        public WorkSource source;
53        public RequestWrapper(ProviderRequestUnbundled request, WorkSource source) {
54            this.request = request;
55            this.source = source;
56        }
57    }
58
59    public FusedLocationProvider(Context context) {
60        super(TAG, PROPERTIES);
61        mContext = context;
62        mEngine = new FusionEngine(context, Looper.myLooper());
63    }
64
65    /**
66     * For serializing requests to mEngine.
67     */
68    private Handler mHandler = new Handler() {
69        @Override
70        public void handleMessage(Message msg) {
71            switch (msg.what) {
72                case MSG_ENABLE:
73                    mEngine.init(FusedLocationProvider.this);
74                    break;
75                case MSG_DISABLE:
76                    mEngine.deinit();
77                    break;
78                case MSG_SET_REQUEST:
79                    {
80                        RequestWrapper wrapper = (RequestWrapper) msg.obj;
81                        mEngine.setRequest(wrapper.request, wrapper.source);
82                        break;
83                    }
84            }
85        }
86    };
87
88    @Override
89    public void onEnable() {
90        mHandler.sendEmptyMessage(MSG_ENABLE);
91    }
92
93    @Override
94    public void onDisable() {
95        mHandler.sendEmptyMessage(MSG_DISABLE);
96    }
97
98    @Override
99    public void onSetRequest(ProviderRequestUnbundled request, WorkSource source) {
100        mHandler.obtainMessage(MSG_SET_REQUEST, new RequestWrapper(request, source)).sendToTarget();
101    }
102
103    @Override
104    public void onDump(FileDescriptor fd, PrintWriter pw, String[] args) {
105        // perform synchronously
106        mEngine.dump(fd, pw, args);
107    }
108
109    @Override
110    public int onGetStatus(Bundle extras) {
111        return LocationProvider.AVAILABLE;
112    }
113
114    @Override
115    public long onGetStatusUpdateTime() {
116        return 0;
117    }
118}
119