| /* |
| * Copyright (C) 2020 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.injector; |
| |
| import android.app.AppOpsManager; |
| import android.content.Context; |
| import android.location.util.identity.CallerIdentity; |
| import android.os.Binder; |
| |
| import com.android.internal.util.Preconditions; |
| import com.android.server.FgThread; |
| |
| import java.util.Objects; |
| |
| /** |
| * Provides helpers and listeners for appops. |
| */ |
| public class SystemAppOpsHelper extends AppOpsHelper { |
| |
| private final Context mContext; |
| |
| private AppOpsManager mAppOps; |
| |
| public SystemAppOpsHelper(Context context) { |
| mContext = context; |
| } |
| |
| /** Called when system is ready. */ |
| public void onSystemReady() { |
| if (mAppOps != null) { |
| return; |
| } |
| |
| mAppOps = Objects.requireNonNull(mContext.getSystemService(AppOpsManager.class)); |
| mAppOps.startWatchingMode( |
| AppOpsManager.OP_COARSE_LOCATION, |
| null, |
| AppOpsManager.WATCH_FOREGROUND_CHANGES, |
| (op, packageName) -> { |
| // invoked on ui thread, move to fg thread so ui thread isn't blocked |
| FgThread.getHandler().post(() -> notifyAppOpChanged(packageName)); |
| }); |
| } |
| |
| @Override |
| public boolean startOpNoThrow(int appOp, CallerIdentity callerIdentity) { |
| Preconditions.checkState(mAppOps != null); |
| |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return mAppOps.startOpNoThrow( |
| appOp, |
| callerIdentity.getUid(), |
| callerIdentity.getPackageName(), |
| false, |
| callerIdentity.getAttributionTag(), |
| callerIdentity.getListenerId()) == AppOpsManager.MODE_ALLOWED; |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| @Override |
| public void finishOp(int appOp, CallerIdentity callerIdentity) { |
| Preconditions.checkState(mAppOps != null); |
| |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| mAppOps.finishOp( |
| appOp, |
| callerIdentity.getUid(), |
| callerIdentity.getPackageName(), |
| callerIdentity.getAttributionTag()); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| @Override |
| public boolean checkOpNoThrow(int appOp, CallerIdentity callerIdentity) { |
| Preconditions.checkState(mAppOps != null); |
| |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return mAppOps.checkOpNoThrow( |
| appOp, |
| callerIdentity.getUid(), |
| callerIdentity.getPackageName()) == AppOpsManager.MODE_ALLOWED; |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| @Override |
| public boolean noteOp(int appOp, CallerIdentity callerIdentity) { |
| Preconditions.checkState(mAppOps != null); |
| |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return mAppOps.noteOp( |
| appOp, |
| callerIdentity.getUid(), |
| callerIdentity.getPackageName(), |
| callerIdentity.getAttributionTag(), |
| callerIdentity.getListenerId()) == AppOpsManager.MODE_ALLOWED; |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| @Override |
| public boolean noteOpNoThrow(int appOp, CallerIdentity callerIdentity) { |
| Preconditions.checkState(mAppOps != null); |
| |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return mAppOps.noteOpNoThrow( |
| appOp, |
| callerIdentity.getUid(), |
| callerIdentity.getPackageName(), |
| callerIdentity.getAttributionTag(), |
| callerIdentity.getListenerId()) == AppOpsManager.MODE_ALLOWED; |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |