| /* |
| * 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 static com.android.internal.util.ConcurrentUtils.DIRECT_EXECUTOR; |
| |
| import android.annotation.Nullable; |
| import android.content.ComponentName; |
| 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.util.ArraySet; |
| 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.ServiceWatcher; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Proxy for ILocationProvider implementations. |
| */ |
| public class LocationProviderProxy extends AbstractLocationProvider { |
| |
| private static final String TAG = "LocationProviderProxy"; |
| |
| private static final int MAX_ADDITIONAL_PACKAGES = 2; |
| |
| /** |
| * Creates and registers this proxy. If no suitable service is available for the proxy, returns |
| * null. |
| */ |
| @Nullable |
| public static LocationProviderProxy createAndRegister(Context context, String action, |
| int enableOverlayResId, int nonOverlayPackageResId) { |
| LocationProviderProxy proxy = new LocationProviderProxy(context, action, enableOverlayResId, |
| nonOverlayPackageResId); |
| if (proxy.register()) { |
| return proxy; |
| } else { |
| return null; |
| } |
| } |
| |
| private final ILocationProviderManager.Stub mManager = new ILocationProviderManager.Stub() { |
| // executed on binder thread |
| @Override |
| public void onSetAdditionalProviderPackages(List<String> packageNames) { |
| int maxCount = Math.min(MAX_ADDITIONAL_PACKAGES, packageNames.size()); |
| ArraySet<String> allPackages = new ArraySet<>(maxCount + 1); |
| for (String packageName : packageNames) { |
| if (packageNames.size() >= maxCount) { |
| return; |
| } |
| |
| try { |
| mContext.getPackageManager().getPackageInfo(packageName, MATCH_SYSTEM_ONLY); |
| allPackages.add(packageName); |
| } catch (PackageManager.NameNotFoundException e) { |
| Log.w(TAG, mServiceWatcher + " specified unknown additional provider package: " |
| + packageName); |
| } |
| } |
| |
| synchronized (mLock) { |
| if (!mBound) { |
| return; |
| } |
| |
| // add the binder package |
| ComponentName service = mServiceWatcher.getBoundService().component; |
| if (service != null) { |
| allPackages.add(service.getPackageName()); |
| } |
| |
| setPackageNames(allPackages); |
| } |
| } |
| |
| // executed on binder thread |
| @Override |
| public void onSetAllowed(boolean allowed) { |
| synchronized (mLock) { |
| if (mBound) { |
| setAllowed(allowed); |
| } |
| } |
| } |
| |
| // executed on binder thread |
| @Override |
| public void onSetProperties(ProviderProperties properties) { |
| synchronized (mLock) { |
| if (mBound) { |
| setProperties(properties); |
| } |
| } |
| } |
| |
| // executed on binder thread |
| @Override |
| public void onReportLocation(Location location) { |
| reportLocation(location); |
| } |
| }; |
| |
| // also used to synchronized any state changes (setEnabled, setProperties, setState, etc) |
| private final Object mLock = new Object(); |
| |
| private final Context mContext; |
| private final ServiceWatcher mServiceWatcher; |
| |
| @GuardedBy("mLock") |
| private boolean mBound; |
| |
| private volatile ProviderRequest mRequest; |
| |
| private LocationProviderProxy(Context context, String action, int enableOverlayResId, |
| int nonOverlayPackageResId) { |
| // safe to use direct executor since our locks are not acquired in a code path invoked by |
| // our owning provider |
| super(DIRECT_EXECUTOR, Collections.emptySet()); |
| |
| mContext = context; |
| mServiceWatcher = new ServiceWatcher(context, FgThread.getHandler(), action, this::onBind, |
| this::onUnbind, enableOverlayResId, nonOverlayPackageResId); |
| |
| mBound = false; |
| mRequest = ProviderRequest.EMPTY_REQUEST; |
| } |
| |
| private boolean register() { |
| return mServiceWatcher.register(); |
| } |
| |
| private void onBind(IBinder binder) throws RemoteException { |
| ILocationProvider provider = ILocationProvider.Stub.asInterface(binder); |
| |
| synchronized (mLock) { |
| mBound = true; |
| |
| provider.setLocationProviderManager(mManager); |
| |
| ProviderRequest request = mRequest; |
| if (!request.equals(ProviderRequest.EMPTY_REQUEST)) { |
| provider.setRequest(request, request.workSource); |
| } |
| |
| ComponentName service = mServiceWatcher.getBoundService().component; |
| if (service != null) { |
| setPackageNames(Collections.singleton(service.getPackageName())); |
| } |
| } |
| } |
| |
| private void onUnbind() { |
| synchronized (mLock) { |
| mBound = false; |
| setState(State.EMPTY_STATE); |
| } |
| } |
| |
| @Override |
| public void onSetRequest(ProviderRequest request) { |
| mRequest = request; |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| service.setRequest(request, request.workSource); |
| }); |
| } |
| |
| @Override |
| public void onExtraCommand(int uid, int pid, String command, Bundle extras) { |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| service.sendExtraCommand(command, extras); |
| }); |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| mServiceWatcher.dump(fd, pw, args); |
| } |
| } |