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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.location.fused;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import com.android.location.provider.LocationProviderBase;
import com.android.location.provider.ProviderPropertiesUnbundled;
import com.android.location.provider.ProviderRequestUnbundled;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.location.Criteria;
import android.location.LocationProvider;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.UserHandle;
import android.os.WorkSource;
public class FusedLocationProvider extends LocationProviderBase implements FusionEngine.Callback {
private static final String TAG = "FusedLocationProvider";
private static ProviderPropertiesUnbundled PROPERTIES = ProviderPropertiesUnbundled.create(
false, false, false, false, true, true, true, Criteria.POWER_LOW,
Criteria.ACCURACY_FINE);
private static final int MSG_ENABLE = 1;
private static final int MSG_DISABLE = 2;
private static final int MSG_SET_REQUEST = 3;
private final Context mContext;
private final FusionEngine mEngine;
private static class RequestWrapper {
public ProviderRequestUnbundled request;
public WorkSource source;
public RequestWrapper(ProviderRequestUnbundled request, WorkSource source) {
this.request = request;
this.source = source;
}
}
public FusedLocationProvider(Context context) {
super(TAG, PROPERTIES);
mContext = context;
mEngine = new FusionEngine(context, Looper.myLooper());
// listen for user change
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_USER_SWITCHED);
mContext.registerReceiverAsUser(new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (Intent.ACTION_USER_SWITCHED.equals(action)) {
mEngine.switchUser();
}
}
}, UserHandle.ALL, intentFilter, null, mHandler);
}
/**
* For serializing requests to mEngine.
*/
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_ENABLE:
mEngine.init(FusedLocationProvider.this);
break;
case MSG_DISABLE:
mEngine.deinit();
break;
case MSG_SET_REQUEST:
{
RequestWrapper wrapper = (RequestWrapper) msg.obj;
mEngine.setRequest(wrapper.request, wrapper.source);
break;
}
}
}
};
@Override
public void onEnable() {
mHandler.sendEmptyMessage(MSG_ENABLE);
}
@Override
public void onDisable() {
mHandler.sendEmptyMessage(MSG_DISABLE);
}
@Override
public void onSetRequest(ProviderRequestUnbundled request, WorkSource source) {
mHandler.obtainMessage(MSG_SET_REQUEST, new RequestWrapper(request, source)).sendToTarget();
}
@Override
public void onDump(FileDescriptor fd, PrintWriter pw, String[] args) {
// perform synchronously
mEngine.dump(fd, pw, args);
}
@Override
public int onGetStatus(Bundle extras) {
return LocationProvider.AVAILABLE;
}
@Override
public long onGetStatusUpdateTime() {
return 0;
}
}
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