| /* |
| * Copyright (C) 2009 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.server.location; |
| |
| import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.location.Location; |
| import android.os.Bundle; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.os.WorkSource; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.location.ILocationProvider; |
| import com.android.internal.location.ILocationProviderManager; |
| import com.android.internal.location.ProviderProperties; |
| import com.android.internal.location.ProviderRequest; |
| import com.android.server.FgThread; |
| import com.android.server.LocationManagerService; |
| import com.android.server.ServiceWatcher; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * Proxy for ILocationProvider implementations. |
| */ |
| public class LocationProviderProxy extends AbstractLocationProvider { |
| |
| private static final String TAG = "LocationProviderProxy"; |
| private static final boolean D = LocationManagerService.D; |
| |
| // used to ensure that updates to mProviderPackages are atomic |
| private final Object mProviderPackagesLock = new Object(); |
| |
| // used to ensure that updates to mRequest and mWorkSource are atomic |
| private final Object mRequestLock = new Object(); |
| |
| private final ILocationProviderManager.Stub mManager = new ILocationProviderManager.Stub() { |
| // executed on binder thread |
| @Override |
| public void onSetAdditionalProviderPackages(List<String> packageNames) { |
| LocationProviderProxy.this.onSetAdditionalProviderPackages(packageNames); |
| } |
| |
| // executed on binder thread |
| @Override |
| public void onSetEnabled(boolean enabled) { |
| LocationProviderProxy.this.setEnabled(enabled); |
| } |
| |
| // executed on binder thread |
| @Override |
| public void onSetProperties(ProviderProperties properties) { |
| LocationProviderProxy.this.setProperties(properties); |
| } |
| |
| // executed on binder thread |
| @Override |
| public void onReportLocation(Location location) { |
| LocationProviderProxy.this.reportLocation(location); |
| } |
| }; |
| |
| private final ServiceWatcher mServiceWatcher; |
| |
| @GuardedBy("mProviderPackagesLock") |
| private final CopyOnWriteArrayList<String> mProviderPackages = new CopyOnWriteArrayList<>(); |
| |
| @GuardedBy("mRequestLock") |
| @Nullable |
| private ProviderRequest mRequest; |
| @GuardedBy("mRequestLock") |
| private WorkSource mWorkSource; |
| |
| /** |
| * Creates a new LocationProviderProxy and immediately begins binding to the best applicable |
| * service. |
| */ |
| @Nullable |
| public static LocationProviderProxy createAndBind( |
| Context context, LocationProviderManager locationProviderManager, String action, |
| int overlaySwitchResId, int defaultServicePackageNameResId, |
| int initialPackageNamesResId) { |
| LocationProviderProxy proxy = new LocationProviderProxy(context, locationProviderManager, |
| action, overlaySwitchResId, defaultServicePackageNameResId, |
| initialPackageNamesResId); |
| if (proxy.bind()) { |
| return proxy; |
| } else { |
| return null; |
| } |
| } |
| |
| private LocationProviderProxy(Context context, LocationProviderManager locationProviderManager, |
| String action, int overlaySwitchResId, int defaultServicePackageNameResId, |
| int initialPackageNamesResId) { |
| super(context, locationProviderManager); |
| |
| mServiceWatcher = new ServiceWatcher(context, TAG, action, overlaySwitchResId, |
| defaultServicePackageNameResId, initialPackageNamesResId, |
| FgThread.getHandler()) { |
| |
| @Override |
| protected void onBind() { |
| runOnBinder(LocationProviderProxy.this::initializeService); |
| } |
| |
| @Override |
| protected void onUnbind() { |
| resetProviderPackages(Collections.emptyList()); |
| setEnabled(false); |
| setProperties(null); |
| } |
| }; |
| |
| mRequest = null; |
| mWorkSource = new WorkSource(); |
| } |
| |
| private boolean bind() { |
| return mServiceWatcher.start(); |
| } |
| |
| private void initializeService(IBinder binder) throws RemoteException { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| if (D) Log.d(TAG, "applying state to connected service " + mServiceWatcher); |
| |
| resetProviderPackages(Collections.emptyList()); |
| |
| service.setLocationProviderManager(mManager); |
| |
| synchronized (mRequestLock) { |
| if (mRequest != null) { |
| service.setRequest(mRequest, mWorkSource); |
| } |
| } |
| } |
| |
| @Override |
| public List<String> getProviderPackages() { |
| synchronized (mProviderPackagesLock) { |
| return mProviderPackages; |
| } |
| } |
| |
| @Override |
| public void onSetRequest(ProviderRequest request, WorkSource source) { |
| synchronized (mRequestLock) { |
| mRequest = request; |
| mWorkSource = source; |
| } |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| service.setRequest(request, source); |
| }); |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| pw.println("service=" + mServiceWatcher); |
| synchronized (mProviderPackagesLock) { |
| if (mProviderPackages.size() > 1) { |
| pw.println("additional packages=" + mProviderPackages); |
| } |
| } |
| } |
| |
| @Override |
| public void onSendExtraCommand(int uid, int pid, String command, Bundle extras) { |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| service.sendExtraCommand(command, extras); |
| }); |
| } |
| |
| private void onSetAdditionalProviderPackages(List<String> packageNames) { |
| resetProviderPackages(packageNames); |
| } |
| |
| private void resetProviderPackages(List<String> additionalPackageNames) { |
| ArrayList<String> permittedPackages = new ArrayList<>(additionalPackageNames.size()); |
| for (String packageName : additionalPackageNames) { |
| try { |
| mContext.getPackageManager().getPackageInfo(packageName, MATCH_SYSTEM_ONLY); |
| permittedPackages.add(packageName); |
| } catch (PackageManager.NameNotFoundException e) { |
| Log.w(TAG, mServiceWatcher + " specified unknown additional provider package: " |
| + packageName); |
| } |
| } |
| |
| synchronized (mProviderPackagesLock) { |
| mProviderPackages.clear(); |
| String myPackage = mServiceWatcher.getCurrentPackageName(); |
| if (myPackage != null) { |
| mProviderPackages.add(myPackage); |
| mProviderPackages.addAll(permittedPackages); |
| } |
| } |
| } |
| } |