7e9f4eb260
This fixes a problem where applications could ask the location manager to do very heavy-weight things (like... say... update location every minute), which would get accounted against the system instead of the application because ultimately it is the system making the heavy calls (wake locks, etc). To solve this, we introduce a new class WorkSource representing the source of some work. Wake locks and Wifi locks allow you to set the source to use (but only if you are system code and thus can get the permission to do so), which is what will be reported to the battery stats until the actual caller. For the initial implementation, the location manager keeps track of all clients requesting periodic updates, and tells its providers about them as a WorkSource param when setting their min update time. The network location provider uses this to set the source on the wake and wifi locks it acquires, when doing work because of the update period. This should also be used elsewhere, such as in the GPS provider, but this is a good start. Change-Id: I2b6ffafad9e90ecf15d7c502e2db675fd52ae3cf
428 lines
12 KiB
Java
428 lines
12 KiB
Java
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.location;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.Intent;
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import android.content.ServiceConnection;
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import android.location.Criteria;
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import android.location.ILocationProvider;
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import android.location.Location;
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import android.net.NetworkInfo;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.IBinder;
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import android.os.RemoteException;
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import android.os.SystemClock;
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import android.os.WorkSource;
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import android.util.Log;
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import com.android.internal.location.DummyLocationProvider;
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/**
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* A class for proxying location providers implemented as services.
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*
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* {@hide}
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*/
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public class LocationProviderProxy implements LocationProviderInterface {
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private static final String TAG = "LocationProviderProxy";
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private final Context mContext;
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private final String mName;
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private ILocationProvider mProvider;
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private Handler mHandler;
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private final Connection mServiceConnection = new Connection();
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// cached values set by the location manager
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private boolean mLocationTracking = false;
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private boolean mEnabled = false;
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private long mMinTime = -1;
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private WorkSource mMinTimeSource = new WorkSource();
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private int mNetworkState;
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private NetworkInfo mNetworkInfo;
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// for caching requiresNetwork, requiresSatellite, etc.
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private DummyLocationProvider mCachedAttributes;
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// constructor for proxying location providers implemented in a separate service
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public LocationProviderProxy(Context context, String name, String serviceName,
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Handler handler) {
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mContext = context;
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mName = name;
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mHandler = handler;
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mContext.bindService(new Intent(serviceName), mServiceConnection, Context.BIND_AUTO_CREATE);
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}
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private class Connection implements ServiceConnection {
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public void onServiceConnected(ComponentName className, IBinder service) {
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Log.d(TAG, "LocationProviderProxy.onServiceConnected " + className);
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synchronized (this) {
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mProvider = ILocationProvider.Stub.asInterface(service);
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if (mProvider != null) {
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mHandler.post(mServiceConnectedTask);
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}
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}
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}
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public void onServiceDisconnected(ComponentName className) {
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Log.d(TAG, "LocationProviderProxy.onServiceDisconnected " + className);
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synchronized (this) {
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mProvider = null;
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}
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}
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}
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private Runnable mServiceConnectedTask = new Runnable() {
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public void run() {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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if (provider == null) {
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return;
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}
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}
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if (mCachedAttributes == null) {
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try {
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mCachedAttributes = new DummyLocationProvider(mName, null);
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mCachedAttributes.setRequiresNetwork(provider.requiresNetwork());
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mCachedAttributes.setRequiresSatellite(provider.requiresSatellite());
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mCachedAttributes.setRequiresCell(provider.requiresCell());
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mCachedAttributes.setHasMonetaryCost(provider.hasMonetaryCost());
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mCachedAttributes.setSupportsAltitude(provider.supportsAltitude());
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mCachedAttributes.setSupportsSpeed(provider.supportsSpeed());
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mCachedAttributes.setSupportsBearing(provider.supportsBearing());
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mCachedAttributes.setPowerRequirement(provider.getPowerRequirement());
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mCachedAttributes.setAccuracy(provider.getAccuracy());
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} catch (RemoteException e) {
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mCachedAttributes = null;
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}
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}
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// resend previous values from the location manager if the service has restarted
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try {
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if (mEnabled) {
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provider.enable();
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}
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if (mLocationTracking) {
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provider.enableLocationTracking(true);
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}
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if (mMinTime >= 0) {
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provider.setMinTime(mMinTime, mMinTimeSource);
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}
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if (mNetworkInfo != null) {
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provider.updateNetworkState(mNetworkState, mNetworkInfo);
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}
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} catch (RemoteException e) {
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}
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}
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};
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public String getName() {
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return mName;
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}
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public boolean requiresNetwork() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.requiresNetwork();
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} else {
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return false;
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}
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}
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public boolean requiresSatellite() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.requiresSatellite();
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} else {
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return false;
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}
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}
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public boolean requiresCell() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.requiresCell();
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} else {
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return false;
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}
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}
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public boolean hasMonetaryCost() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.hasMonetaryCost();
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} else {
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return false;
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}
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}
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public boolean supportsAltitude() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.supportsAltitude();
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} else {
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return false;
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}
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}
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public boolean supportsSpeed() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.supportsSpeed();
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} else {
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return false;
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}
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}
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public boolean supportsBearing() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.supportsBearing();
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} else {
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return false;
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}
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}
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public int getPowerRequirement() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.getPowerRequirement();
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} else {
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return -1;
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}
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}
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public boolean meetsCriteria(Criteria criteria) {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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return provider.meetsCriteria(criteria);
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} catch (RemoteException e) {
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}
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}
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// default implementation if we lost connection to the provider
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if ((criteria.getAccuracy() != Criteria.NO_REQUIREMENT) &&
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(criteria.getAccuracy() < getAccuracy())) {
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return false;
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}
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int criteriaPower = criteria.getPowerRequirement();
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if ((criteriaPower != Criteria.NO_REQUIREMENT) &&
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(criteriaPower < getPowerRequirement())) {
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return false;
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}
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if (criteria.isAltitudeRequired() && !supportsAltitude()) {
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return false;
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}
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if (criteria.isSpeedRequired() && !supportsSpeed()) {
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return false;
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}
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if (criteria.isBearingRequired() && !supportsBearing()) {
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return false;
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}
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return true;
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}
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public int getAccuracy() {
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if (mCachedAttributes != null) {
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return mCachedAttributes.getAccuracy();
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} else {
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return -1;
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}
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}
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public void enable() {
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mEnabled = true;
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.enable();
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} catch (RemoteException e) {
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}
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}
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}
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public void disable() {
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mEnabled = false;
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.disable();
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} catch (RemoteException e) {
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}
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}
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}
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public boolean isEnabled() {
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return mEnabled;
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}
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public int getStatus(Bundle extras) {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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return provider.getStatus(extras);
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} catch (RemoteException e) {
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}
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}
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return 0;
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}
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public long getStatusUpdateTime() {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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return provider.getStatusUpdateTime();
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} catch (RemoteException e) {
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}
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}
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return 0;
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}
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public String getInternalState() {
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try {
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return mProvider.getInternalState();
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} catch (RemoteException e) {
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Log.e(TAG, "getInternalState failed", e);
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return null;
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}
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}
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public boolean isLocationTracking() {
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return mLocationTracking;
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}
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public void enableLocationTracking(boolean enable) {
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mLocationTracking = enable;
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if (!enable) {
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mMinTime = -1;
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mMinTimeSource.clear();
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}
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.enableLocationTracking(enable);
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} catch (RemoteException e) {
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}
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}
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}
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public boolean requestSingleShotFix() {
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return false;
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}
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public long getMinTime() {
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return mMinTime;
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}
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public void setMinTime(long minTime, WorkSource ws) {
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mMinTime = minTime;
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mMinTimeSource.set(ws);
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.setMinTime(minTime, ws);
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} catch (RemoteException e) {
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}
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}
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}
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public void updateNetworkState(int state, NetworkInfo info) {
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mNetworkState = state;
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mNetworkInfo = info;
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.updateNetworkState(state, info);
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} catch (RemoteException e) {
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}
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}
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}
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public void updateLocation(Location location) {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.updateLocation(location);
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} catch (RemoteException e) {
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}
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}
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}
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public boolean sendExtraCommand(String command, Bundle extras) {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.sendExtraCommand(command, extras);
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} catch (RemoteException e) {
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}
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}
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return false;
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}
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public void addListener(int uid) {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.addListener(uid);
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} catch (RemoteException e) {
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}
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}
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}
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public void removeListener(int uid) {
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ILocationProvider provider;
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synchronized (mServiceConnection) {
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provider = mProvider;
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}
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if (provider != null) {
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try {
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provider.removeListener(uid);
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} catch (RemoteException e) {
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}
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}
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}
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}
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