packages/SystemUI/src/com/android/systemui/appops/AppOpsControllerImpl.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2018 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.systemui.appops;

 import static android.media.AudioManager.ACTION_MICROPHONE_MUTE_CHANGED;

 import android.app.AppOpsManager;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.location.LocationManager;
 import android.media.AudioManager;
 import android.media.AudioRecordingConfiguration;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.UserHandle;
 import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.Log;
 import android.util.SparseArray;

 import androidx.annotation.WorkerThread;

 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.systemui.Dumpable;
 import com.android.systemui.broadcast.BroadcastDispatcher;
 import com.android.systemui.dagger.qualifiers.Background;
 import com.android.systemui.dump.DumpManager;

 import java.io.FileDescriptor;
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;

 import javax.inject.Inject;
 import javax.inject.Singleton;

 /**
  * Controller to keep track of applications that have requested access to given App Ops
  *
  * It can be subscribed to with callbacks. Additionally, it passes on the information to
  * NotificationPresenter to be displayed to the user.
  */
 @Singleton
 public class AppOpsControllerImpl extends BroadcastReceiver implements AppOpsController,
         AppOpsManager.OnOpActiveChangedInternalListener,
         AppOpsManager.OnOpNotedListener, Dumpable {

     // This is the minimum time that we will keep AppOps that are noted on record. If multiple
     // occurrences of the same (op, package, uid) happen in a shorter interval, they will not be
     // notified to listeners.
     private static final long NOTED_OP_TIME_DELAY_MS = 5000;
     private static final String TAG = "AppOpsControllerImpl";
     private static final boolean DEBUG = false;

     private final BroadcastDispatcher mDispatcher;
     private final AppOpsManager mAppOps;
     private final AudioManager mAudioManager;
     private final LocationManager mLocationManager;

     // mLocationProviderPackages are cached and updated only occasionally
     private static final long LOCATION_PROVIDER_UPDATE_FREQUENCY_MS = 30000;
     private long mLastLocationProviderPackageUpdate;
     private List<String> mLocationProviderPackages;

     private H mBGHandler;
     private final List<AppOpsController.Callback> mCallbacks = new ArrayList<>();
     private final ArrayMap<Integer, Set<Callback>> mCallbacksByCode = new ArrayMap<>();
     private final PermissionFlagsCache mFlagsCache;
     private boolean mListening;
     private boolean mMicMuted;

     @GuardedBy("mActiveItems")
     private final List<AppOpItem> mActiveItems = new ArrayList<>();
     @GuardedBy("mNotedItems")
     private final List<AppOpItem> mNotedItems = new ArrayList<>();
     @GuardedBy("mActiveItems")
     private final SparseArray<ArrayList<AudioRecordingConfiguration>> mRecordingsByUid =
             new SparseArray<>();

     protected static final int[] OPS = new int[] {
             AppOpsManager.OP_CAMERA,
             AppOpsManager.OP_PHONE_CALL_CAMERA,
             AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
             AppOpsManager.OP_RECORD_AUDIO,
             AppOpsManager.OP_PHONE_CALL_MICROPHONE,
             AppOpsManager.OP_COARSE_LOCATION,
             AppOpsManager.OP_FINE_LOCATION
     };

     @Inject
     public AppOpsControllerImpl(
             Context context,
             @Background Looper bgLooper,
             DumpManager dumpManager,
             PermissionFlagsCache cache,
             AudioManager audioManager,
             BroadcastDispatcher dispatcher
     ) {
         mDispatcher = dispatcher;
         mAppOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
         mFlagsCache = cache;
         mBGHandler = new H(bgLooper);
         final int numOps = OPS.length;
         for (int i = 0; i < numOps; i++) {
             mCallbacksByCode.put(OPS[i], new ArraySet<>());
         }
         mAudioManager = audioManager;
         mMicMuted = audioManager.isMicrophoneMute();
         mLocationManager = context.getSystemService(LocationManager.class);
         dumpManager.registerDumpable(TAG, this);
     }

     @VisibleForTesting
     protected void setBGHandler(H handler) {
         mBGHandler = handler;
     }

     @VisibleForTesting
     protected void setListening(boolean listening) {
         mListening = listening;
         if (listening) {
             mAppOps.startWatchingActive(OPS, this);
             mAppOps.startWatchingNoted(OPS, this);
             mAudioManager.registerAudioRecordingCallback(mAudioRecordingCallback, mBGHandler);
             mBGHandler.post(() -> mAudioRecordingCallback.onRecordingConfigChanged(
                     mAudioManager.getActiveRecordingConfigurations()));
             mDispatcher.registerReceiverWithHandler(this,
                     new IntentFilter(ACTION_MICROPHONE_MUTE_CHANGED), mBGHandler);

         } else {
             mAppOps.stopWatchingActive(this);
             mAppOps.stopWatchingNoted(this);
             mAudioManager.unregisterAudioRecordingCallback(mAudioRecordingCallback);

             mBGHandler.removeCallbacksAndMessages(null); // null removes all
             mDispatcher.unregisterReceiver(this);
             synchronized (mActiveItems) {
                 mActiveItems.clear();
                 mRecordingsByUid.clear();
             }
             synchronized (mNotedItems) {
                 mNotedItems.clear();
             }
         }
     }

     /**
      * Adds a callback that will get notifified when an AppOp of the type the controller tracks
      * changes
      *
      * @param callback Callback to report changes
      * @param opsCodes App Ops the callback is interested in checking
      *
      * @see #removeCallback(int[], Callback)
      */
     @Override
     public void addCallback(int[] opsCodes, AppOpsController.Callback callback) {
         boolean added = false;
         final int numCodes = opsCodes.length;
         for (int i = 0; i < numCodes; i++) {
             if (mCallbacksByCode.containsKey(opsCodes[i])) {
                 mCallbacksByCode.get(opsCodes[i]).add(callback);
                 added = true;
             } else {
                 if (DEBUG) Log.wtf(TAG, "APP_OP " + opsCodes[i] + " not supported");
             }
         }
         if (added) mCallbacks.add(callback);
         if (!mCallbacks.isEmpty()) setListening(true);
     }

     /**
      * Removes a callback from those notified when an AppOp of the type the controller tracks
      * changes
      *
      * @param callback Callback to stop reporting changes
      * @param opsCodes App Ops the callback was interested in checking
      *
      * @see #addCallback(int[], Callback)
      */
     @Override
     public void removeCallback(int[] opsCodes, AppOpsController.Callback callback) {
         final int numCodes = opsCodes.length;
         for (int i = 0; i < numCodes; i++) {
             if (mCallbacksByCode.containsKey(opsCodes[i])) {
                 mCallbacksByCode.get(opsCodes[i]).remove(callback);
             }
         }
         mCallbacks.remove(callback);
         if (mCallbacks.isEmpty()) setListening(false);
     }

     // Find item number in list, only call if the list passed is locked
     private AppOpItem getAppOpItemLocked(List<AppOpItem> appOpList, int code, int uid,
             String packageName) {
         final int itemsQ = appOpList.size();
         for (int i = 0; i < itemsQ; i++) {
             AppOpItem item = appOpList.get(i);
             if (item.getCode() == code && item.getUid() == uid
                     && item.getPackageName().equals(packageName)) {
                 return item;
             }
         }
         return null;
     }

     private boolean updateActives(int code, int uid, String packageName, boolean active) {
         synchronized (mActiveItems) {
             AppOpItem item = getAppOpItemLocked(mActiveItems, code, uid, packageName);
             if (item == null && active) {
                 item = new AppOpItem(code, uid, packageName, System.currentTimeMillis());
                 if (code == AppOpsManager.OP_RECORD_AUDIO) {
                     item.setSilenced(isAnyRecordingPausedLocked(uid));
                 }
                 mActiveItems.add(item);
                 if (DEBUG) Log.w(TAG, "Added item: " + item.toString());
                 return !item.isSilenced();
             } else if (item != null && !active) {
                 mActiveItems.remove(item);
                 if (DEBUG) Log.w(TAG, "Removed item: " + item.toString());
                 return true;
             }
             return false;
         }
     }

     private void removeNoted(int code, int uid, String packageName) {
         AppOpItem item;
         synchronized (mNotedItems) {
             item = getAppOpItemLocked(mNotedItems, code, uid, packageName);
             if (item == null) return;
             mNotedItems.remove(item);
             if (DEBUG) Log.w(TAG, "Removed item: " + item.toString());
         }
         boolean active;
         // Check if the item is also active
         synchronized (mActiveItems) {
             active = getAppOpItemLocked(mActiveItems, code, uid, packageName) != null;
         }
         if (!active) {
             notifySuscribersWorker(code, uid, packageName, false);
         }
     }

     private boolean addNoted(int code, int uid, String packageName) {
         AppOpItem item;
         boolean createdNew = false;
         synchronized (mNotedItems) {
             item = getAppOpItemLocked(mNotedItems, code, uid, packageName);
             if (item == null) {
                 item = new AppOpItem(code, uid, packageName, System.currentTimeMillis());
                 mNotedItems.add(item);
                 if (DEBUG) Log.w(TAG, "Added item: " + item.toString());
                 createdNew = true;
             }
         }
         // We should keep this so we make sure it cannot time out.
         mBGHandler.removeCallbacksAndMessages(item);
         mBGHandler.scheduleRemoval(item, NOTED_OP_TIME_DELAY_MS);
         return createdNew;
     }

     /**
      * Does the app-op code refer to a user sensitive permission for the specified user id
      * and package. Only user sensitive permission should be shown to the user by default.
      *
      * @param appOpCode The code of the app-op.
      * @param uid The uid of the user.
      * @param packageName The name of the package.
      *
      * @return {@code true} iff the app-op item is user sensitive
      */
     private boolean isUserSensitive(int appOpCode, int uid, String packageName) {
         String permission = AppOpsManager.opToPermission(appOpCode);
         if (permission == null) {
             return false;
         }
         int permFlags = mFlagsCache.getPermissionFlags(permission,
                 packageName, uid);
         return (permFlags & PackageManager.FLAG_PERMISSION_USER_SENSITIVE_WHEN_GRANTED) != 0;
     }

     /**
      * Does the app-op item refer to an operation that should be shown to the user.
      * Only specficic ops (like SYSTEM_ALERT_WINDOW) or ops that refer to user sensitive
      * permission should be shown to the user by default.
      *
      * @param item The item
      *
      * @return {@code true} iff the app-op item should be shown to the user
      */
     private boolean isUserVisible(AppOpItem item) {
         return isUserVisible(item.getCode(), item.getUid(), item.getPackageName());
     }

     /**
      * Checks if a package is the current location provider.
      *
      * <p>Data is cached to avoid too many calls into system server
      *
      * @param packageName The package that might be the location provider
      *
      * @return {@code true} iff the package is the location provider.
      */
     private boolean isLocationProvider(String packageName) {
         long now = System.currentTimeMillis();

         if (mLastLocationProviderPackageUpdate + LOCATION_PROVIDER_UPDATE_FREQUENCY_MS < now) {
             mLastLocationProviderPackageUpdate = now;
             mLocationProviderPackages = mLocationManager.getProviderPackages(
                     LocationManager.FUSED_PROVIDER);
         }

         return mLocationProviderPackages.contains(packageName);
     }

     /**
      * Does the app-op, uid and package name, refer to an operation that should be shown to the
      * user. Only specficic ops (like {@link AppOpsManager.OP_SYSTEM_ALERT_WINDOW}) or
      * ops that refer to user sensitive permission should be shown to the user by default.
      *
      * @param item The item
      *
      * @return {@code true} iff the app-op for should be shown to the user
      */
     private boolean isUserVisible(int appOpCode, int uid, String packageName) {
         // currently OP_SYSTEM_ALERT_WINDOW and OP_MONITOR_HIGH_POWER_LOCATION
         // does not correspond to a platform permission
         // which may be user sensitive, so for now always show it to the user.
         if (appOpCode == AppOpsManager.OP_SYSTEM_ALERT_WINDOW
                 || appOpCode == AppOpsManager.OP_MONITOR_HIGH_POWER_LOCATION
                 || appOpCode == AppOpsManager.OP_PHONE_CALL_CAMERA
                 || appOpCode == AppOpsManager.OP_PHONE_CALL_MICROPHONE) {
             return true;
         }

         if (appOpCode == AppOpsManager.OP_CAMERA && isLocationProvider(packageName)) {
             return true;
         }

         return isUserSensitive(appOpCode, uid, packageName);
     }

     /**
      * Returns a copy of the list containing all the active AppOps that the controller tracks.
      *
      * Call from a worker thread as it may perform long operations.
      *
      * @return List of active AppOps information
      */
     @WorkerThread
     public List<AppOpItem> getActiveAppOps() {
         return getActiveAppOpsForUser(UserHandle.USER_ALL);
     }

     /**
      * Returns a copy of the list containing all the active AppOps that the controller tracks, for
      * a given user id.
      *
      * Call from a worker thread as it may perform long operations.
      *
      * @param userId User id to track, can be {@link UserHandle#USER_ALL}
      *
      * @return List of active AppOps information for that user id
      */
     @WorkerThread
     public List<AppOpItem> getActiveAppOpsForUser(int userId) {
         List<AppOpItem> list = new ArrayList<>();
         synchronized (mActiveItems) {
             final int numActiveItems = mActiveItems.size();
             for (int i = 0; i < numActiveItems; i++) {
                 AppOpItem item = mActiveItems.get(i);
                 if ((userId == UserHandle.USER_ALL
                         || UserHandle.getUserId(item.getUid()) == userId)
                         && isUserVisible(item) && !item.isSilenced()) {
                     list.add(item);
                 }
             }
         }
         synchronized (mNotedItems) {
             final int numNotedItems = mNotedItems.size();
             for (int i = 0; i < numNotedItems; i++) {
                 AppOpItem item = mNotedItems.get(i);
                 if ((userId == UserHandle.USER_ALL
                         || UserHandle.getUserId(item.getUid()) == userId)
                         && isUserVisible(item)) {
                     list.add(item);
                 }
             }
         }
         return list;
     }

     private void notifySuscribers(int code, int uid, String packageName, boolean active) {
         mBGHandler.post(() -> notifySuscribersWorker(code, uid, packageName, active));
     }

     @Override
     public void onOpActiveChanged(int code, int uid, String packageName, boolean active) {
         if (DEBUG) {
             Log.w(TAG, String.format("onActiveChanged(%d,%d,%s,%s", code, uid, packageName,
                     Boolean.toString(active)));
         }
         boolean activeChanged = updateActives(code, uid, packageName, active);
         if (!activeChanged) return; // early return
         // Check if the item is also noted, in that case, there's no update.
         boolean alsoNoted;
         synchronized (mNotedItems) {
             alsoNoted = getAppOpItemLocked(mNotedItems, code, uid, packageName) != null;
         }
         // If active is true, we only send the update if the op is not actively noted (already true)
         // If active is false, we only send the update if the op is not actively noted (prevent
         // early removal)
         if (!alsoNoted) {
             notifySuscribers(code, uid, packageName, active);
         }
     }

     @Override
     public void onOpNoted(int code, int uid, String packageName, int result) {
         if (DEBUG) {
             Log.w(TAG, "Noted op: " + code + " with result "
                     + AppOpsManager.MODE_NAMES[result] + " for package " + packageName);
         }
         if (result != AppOpsManager.MODE_ALLOWED) return;
         boolean notedAdded = addNoted(code, uid, packageName);
         if (!notedAdded) return; // early return
         boolean alsoActive;
         synchronized (mActiveItems) {
             alsoActive = getAppOpItemLocked(mActiveItems, code, uid, packageName) != null;
         }
         if (!alsoActive) {
             notifySuscribers(code, uid, packageName, true);
         }
     }

     private void notifySuscribersWorker(int code, int uid, String packageName, boolean active) {
         if (mCallbacksByCode.containsKey(code) && isUserVisible(code, uid, packageName)) {
             if (DEBUG) Log.d(TAG, "Notifying of change in package " + packageName);
             for (Callback cb: mCallbacksByCode.get(code)) {
                 cb.onActiveStateChanged(code, uid, packageName, active);
             }
         }
     }

     @Override
     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
         pw.println("AppOpsController state:");
         pw.println("  Listening: " + mListening);
         pw.println("  Active Items:");
         for (int i = 0; i < mActiveItems.size(); i++) {
             final AppOpItem item = mActiveItems.get(i);
             pw.print("    "); pw.println(item.toString());
         }
         pw.println("  Noted Items:");
         for (int i = 0; i < mNotedItems.size(); i++) {
             final AppOpItem item = mNotedItems.get(i);
             pw.print("    "); pw.println(item.toString());
         }

     }

     private boolean isAnyRecordingPausedLocked(int uid) {
         if (mMicMuted) {
             return true;
         }
         List<AudioRecordingConfiguration> configs = mRecordingsByUid.get(uid);
         if (configs == null) return false;
         int configsNum = configs.size();
         for (int i = 0; i < configsNum; i++) {
             AudioRecordingConfiguration config = configs.get(i);
             if (config.isClientSilenced()) return true;
         }
         return false;
     }

     private void updateRecordingPausedStatus() {
         synchronized (mActiveItems) {
             int size = mActiveItems.size();
             for (int i = 0; i < size; i++) {
                 AppOpItem item = mActiveItems.get(i);
                 if (item.getCode() == AppOpsManager.OP_RECORD_AUDIO) {
                     boolean paused = isAnyRecordingPausedLocked(item.getUid());
                     if (item.isSilenced() != paused) {
                         item.setSilenced(paused);
                         notifySuscribers(
                                 item.getCode(),
                                 item.getUid(),
                                 item.getPackageName(),
                                 !item.isSilenced()
                         );
                     }
                 }
             }
         }
     }

     private AudioManager.AudioRecordingCallback mAudioRecordingCallback =
             new AudioManager.AudioRecordingCallback() {
         @Override
         public void onRecordingConfigChanged(List<AudioRecordingConfiguration> configs) {
             synchronized (mActiveItems) {
                 mRecordingsByUid.clear();
                 final int recordingsCount = configs.size();
                 for (int i = 0; i < recordingsCount; i++) {
                     AudioRecordingConfiguration recording = configs.get(i);

                     ArrayList<AudioRecordingConfiguration> recordings = mRecordingsByUid.get(
                             recording.getClientUid());
                     if (recordings == null) {
                         recordings = new ArrayList<>();
                         mRecordingsByUid.put(recording.getClientUid(), recordings);
                     }
                     recordings.add(recording);
                 }
             }
             updateRecordingPausedStatus();
         }
     };

     @Override
     public void onReceive(Context context, Intent intent) {
         mMicMuted = mAudioManager.isMicrophoneMute();
         updateRecordingPausedStatus();
     }

     protected class H extends Handler {
         H(Looper looper) {
             super(looper);
         }

         public void scheduleRemoval(AppOpItem item, long timeToRemoval) {
             removeCallbacksAndMessages(item);
             postDelayed(new Runnable() {
                 @Override
                 public void run() {
                     removeNoted(item.getCode(), item.getUid(), item.getPackageName());
                 }
             }, item, timeToRemoval);
         }
     }
 }
	/*
	* Copyright (C) 2018 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.systemui.appops;

	import static android.media.AudioManager.ACTION_MICROPHONE_MUTE_CHANGED;

	import android.app.AppOpsManager;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.pm.PackageManager;
	import android.location.LocationManager;
	import android.media.AudioManager;
	import android.media.AudioRecordingConfiguration;
	import android.os.Handler;
	import android.os.Looper;
	import android.os.UserHandle;
	import android.util.ArrayMap;
	import android.util.ArraySet;
	import android.util.Log;
	import android.util.SparseArray;

	import androidx.annotation.WorkerThread;

	import com.android.internal.annotations.GuardedBy;
	import com.android.internal.annotations.VisibleForTesting;
	import com.android.systemui.Dumpable;
	import com.android.systemui.broadcast.BroadcastDispatcher;
	import com.android.systemui.dagger.qualifiers.Background;
	import com.android.systemui.dump.DumpManager;

	import java.io.FileDescriptor;
	import java.io.PrintWriter;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.Set;

	import javax.inject.Inject;
	import javax.inject.Singleton;

	/**
	* Controller to keep track of applications that have requested access to given App Ops
	*
	* It can be subscribed to with callbacks. Additionally, it passes on the information to
	* NotificationPresenter to be displayed to the user.
	*/
	@Singleton
	public class AppOpsControllerImpl extends BroadcastReceiver implements AppOpsController,
	AppOpsManager.OnOpActiveChangedInternalListener,
	AppOpsManager.OnOpNotedListener, Dumpable {

	// This is the minimum time that we will keep AppOps that are noted on record. If multiple
	// occurrences of the same (op, package, uid) happen in a shorter interval, they will not be
	// notified to listeners.
	private static final long NOTED_OP_TIME_DELAY_MS = 5000;
	private static final String TAG = "AppOpsControllerImpl";
	private static final boolean DEBUG = false;

	private final BroadcastDispatcher mDispatcher;
	private final AppOpsManager mAppOps;
	private final AudioManager mAudioManager;
	private final LocationManager mLocationManager;

	// mLocationProviderPackages are cached and updated only occasionally
	private static final long LOCATION_PROVIDER_UPDATE_FREQUENCY_MS = 30000;
	private long mLastLocationProviderPackageUpdate;
	private List<String> mLocationProviderPackages;

	private H mBGHandler;
	private final List<AppOpsController.Callback> mCallbacks = new ArrayList<>();
	private final ArrayMap<Integer, Set<Callback>> mCallbacksByCode = new ArrayMap<>();
	private final PermissionFlagsCache mFlagsCache;
	private boolean mListening;
	private boolean mMicMuted;

	@GuardedBy("mActiveItems")
	private final List<AppOpItem> mActiveItems = new ArrayList<>();
	@GuardedBy("mNotedItems")
	private final List<AppOpItem> mNotedItems = new ArrayList<>();
	@GuardedBy("mActiveItems")
	private final SparseArray<ArrayList<AudioRecordingConfiguration>> mRecordingsByUid =
	new SparseArray<>();

	protected static final int[] OPS = new int[] {
	AppOpsManager.OP_CAMERA,
	AppOpsManager.OP_PHONE_CALL_CAMERA,
	AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
	AppOpsManager.OP_RECORD_AUDIO,
	AppOpsManager.OP_PHONE_CALL_MICROPHONE,
	AppOpsManager.OP_COARSE_LOCATION,
	AppOpsManager.OP_FINE_LOCATION
	};

	@Inject
	public AppOpsControllerImpl(
	Context context,
	@Background Looper bgLooper,
	DumpManager dumpManager,
	PermissionFlagsCache cache,
	AudioManager audioManager,
	BroadcastDispatcher dispatcher
	) {
	mDispatcher = dispatcher;
	mAppOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
	mFlagsCache = cache;
	mBGHandler = new H(bgLooper);
	final int numOps = OPS.length;
	for (int i = 0; i < numOps; i++) {
	mCallbacksByCode.put(OPS[i], new ArraySet<>());
	}
	mAudioManager = audioManager;
	mMicMuted = audioManager.isMicrophoneMute();
	mLocationManager = context.getSystemService(LocationManager.class);
	dumpManager.registerDumpable(TAG, this);
	}

	@VisibleForTesting
	protected void setBGHandler(H handler) {
	mBGHandler = handler;
	}

	@VisibleForTesting
	protected void setListening(boolean listening) {
	mListening = listening;
	if (listening) {
	mAppOps.startWatchingActive(OPS, this);
	mAppOps.startWatchingNoted(OPS, this);
	mAudioManager.registerAudioRecordingCallback(mAudioRecordingCallback, mBGHandler);
	mBGHandler.post(() -> mAudioRecordingCallback.onRecordingConfigChanged(
	mAudioManager.getActiveRecordingConfigurations()));
	mDispatcher.registerReceiverWithHandler(this,
	new IntentFilter(ACTION_MICROPHONE_MUTE_CHANGED), mBGHandler);

	} else {
	mAppOps.stopWatchingActive(this);
	mAppOps.stopWatchingNoted(this);
	mAudioManager.unregisterAudioRecordingCallback(mAudioRecordingCallback);

	mBGHandler.removeCallbacksAndMessages(null); // null removes all
	mDispatcher.unregisterReceiver(this);
	synchronized (mActiveItems) {
	mActiveItems.clear();
	mRecordingsByUid.clear();
	}
	synchronized (mNotedItems) {
	mNotedItems.clear();
	}
	}
	}

	/**
	* Adds a callback that will get notifified when an AppOp of the type the controller tracks
	* changes
	*
	* @param callback Callback to report changes
	* @param opsCodes App Ops the callback is interested in checking
	*
	* @see #removeCallback(int[], Callback)
	*/
	@Override
	public void addCallback(int[] opsCodes, AppOpsController.Callback callback) {
	boolean added = false;
	final int numCodes = opsCodes.length;
	for (int i = 0; i < numCodes; i++) {
	if (mCallbacksByCode.containsKey(opsCodes[i])) {
	mCallbacksByCode.get(opsCodes[i]).add(callback);
	added = true;
	} else {
	if (DEBUG) Log.wtf(TAG, "APP_OP " + opsCodes[i] + " not supported");
	}
	}
	if (added) mCallbacks.add(callback);
	if (!mCallbacks.isEmpty()) setListening(true);
	}

	/**
	* Removes a callback from those notified when an AppOp of the type the controller tracks
	* changes
	*
	* @param callback Callback to stop reporting changes
	* @param opsCodes App Ops the callback was interested in checking
	*
	* @see #addCallback(int[], Callback)
	*/
	@Override
	public void removeCallback(int[] opsCodes, AppOpsController.Callback callback) {
	final int numCodes = opsCodes.length;
	for (int i = 0; i < numCodes; i++) {
	if (mCallbacksByCode.containsKey(opsCodes[i])) {
	mCallbacksByCode.get(opsCodes[i]).remove(callback);
	}
	}
	mCallbacks.remove(callback);
	if (mCallbacks.isEmpty()) setListening(false);
	}

	// Find item number in list, only call if the list passed is locked
	private AppOpItem getAppOpItemLocked(List<AppOpItem> appOpList, int code, int uid,
	String packageName) {
	final int itemsQ = appOpList.size();
	for (int i = 0; i < itemsQ; i++) {
	AppOpItem item = appOpList.get(i);
	if (item.getCode() == code && item.getUid() == uid
	&& item.getPackageName().equals(packageName)) {
	return item;
	}
	}
	return null;
	}

	private boolean updateActives(int code, int uid, String packageName, boolean active) {
	synchronized (mActiveItems) {
	AppOpItem item = getAppOpItemLocked(mActiveItems, code, uid, packageName);
	if (item == null && active) {
	item = new AppOpItem(code, uid, packageName, System.currentTimeMillis());
	if (code == AppOpsManager.OP_RECORD_AUDIO) {
	item.setSilenced(isAnyRecordingPausedLocked(uid));
	}
	mActiveItems.add(item);
	if (DEBUG) Log.w(TAG, "Added item: " + item.toString());
	return !item.isSilenced();
	} else if (item != null && !active) {
	mActiveItems.remove(item);
	if (DEBUG) Log.w(TAG, "Removed item: " + item.toString());
	return true;
	}
	return false;
	}
	}

	private void removeNoted(int code, int uid, String packageName) {
	AppOpItem item;
	synchronized (mNotedItems) {
	item = getAppOpItemLocked(mNotedItems, code, uid, packageName);
	if (item == null) return;
	mNotedItems.remove(item);
	if (DEBUG) Log.w(TAG, "Removed item: " + item.toString());
	}
	boolean active;
	// Check if the item is also active
	synchronized (mActiveItems) {
	active = getAppOpItemLocked(mActiveItems, code, uid, packageName) != null;
	}
	if (!active) {
	notifySuscribersWorker(code, uid, packageName, false);
	}
	}

	private boolean addNoted(int code, int uid, String packageName) {
	AppOpItem item;
	boolean createdNew = false;
	synchronized (mNotedItems) {
	item = getAppOpItemLocked(mNotedItems, code, uid, packageName);
	if (item == null) {
	item = new AppOpItem(code, uid, packageName, System.currentTimeMillis());
	mNotedItems.add(item);
	if (DEBUG) Log.w(TAG, "Added item: " + item.toString());
	createdNew = true;
	}
	}
	// We should keep this so we make sure it cannot time out.
	mBGHandler.removeCallbacksAndMessages(item);
	mBGHandler.scheduleRemoval(item, NOTED_OP_TIME_DELAY_MS);
	return createdNew;
	}

	/**
	* Does the app-op code refer to a user sensitive permission for the specified user id
	* and package. Only user sensitive permission should be shown to the user by default.
	*
	* @param appOpCode The code of the app-op.
	* @param uid The uid of the user.
	* @param packageName The name of the package.
	*
	* @return {@code true} iff the app-op item is user sensitive
	*/
	private boolean isUserSensitive(int appOpCode, int uid, String packageName) {
	String permission = AppOpsManager.opToPermission(appOpCode);
	if (permission == null) {
	return false;
	}
	int permFlags = mFlagsCache.getPermissionFlags(permission,
	packageName, uid);
	return (permFlags & PackageManager.FLAG_PERMISSION_USER_SENSITIVE_WHEN_GRANTED) != 0;
	}

	/**
	* Does the app-op item refer to an operation that should be shown to the user.
	* Only specficic ops (like SYSTEM_ALERT_WINDOW) or ops that refer to user sensitive
	* permission should be shown to the user by default.
	*
	* @param item The item
	*
	* @return {@code true} iff the app-op item should be shown to the user
	*/
	private boolean isUserVisible(AppOpItem item) {
	return isUserVisible(item.getCode(), item.getUid(), item.getPackageName());
	}

	/**
	* Checks if a package is the current location provider.
	*
	* <p>Data is cached to avoid too many calls into system server
	*
	* @param packageName The package that might be the location provider
	*
	* @return {@code true} iff the package is the location provider.
	*/
	private boolean isLocationProvider(String packageName) {
	long now = System.currentTimeMillis();

	if (mLastLocationProviderPackageUpdate + LOCATION_PROVIDER_UPDATE_FREQUENCY_MS < now) {
	mLastLocationProviderPackageUpdate = now;
	mLocationProviderPackages = mLocationManager.getProviderPackages(
	LocationManager.FUSED_PROVIDER);
	}

	return mLocationProviderPackages.contains(packageName);
	}

	/**
	* Does the app-op, uid and package name, refer to an operation that should be shown to the
	* user. Only specficic ops (like {@link AppOpsManager.OP_SYSTEM_ALERT_WINDOW}) or
	* ops that refer to user sensitive permission should be shown to the user by default.
	*
	* @param item The item
	*
	* @return {@code true} iff the app-op for should be shown to the user
	*/
	private boolean isUserVisible(int appOpCode, int uid, String packageName) {
	// currently OP_SYSTEM_ALERT_WINDOW and OP_MONITOR_HIGH_POWER_LOCATION
	// does not correspond to a platform permission
	// which may be user sensitive, so for now always show it to the user.
	if (appOpCode == AppOpsManager.OP_SYSTEM_ALERT_WINDOW
	\|\| appOpCode == AppOpsManager.OP_MONITOR_HIGH_POWER_LOCATION
	\|\| appOpCode == AppOpsManager.OP_PHONE_CALL_CAMERA
	\|\| appOpCode == AppOpsManager.OP_PHONE_CALL_MICROPHONE) {
	return true;
	}

	if (appOpCode == AppOpsManager.OP_CAMERA && isLocationProvider(packageName)) {
	return true;
	}

	return isUserSensitive(appOpCode, uid, packageName);
	}

	/**
	* Returns a copy of the list containing all the active AppOps that the controller tracks.
	*
	* Call from a worker thread as it may perform long operations.
	*
	* @return List of active AppOps information
	*/
	@WorkerThread
	public List<AppOpItem> getActiveAppOps() {
	return getActiveAppOpsForUser(UserHandle.USER_ALL);
	}

	/**
	* Returns a copy of the list containing all the active AppOps that the controller tracks, for
	* a given user id.
	*
	* Call from a worker thread as it may perform long operations.
	*
	* @param userId User id to track, can be {@link UserHandle#USER_ALL}
	*
	* @return List of active AppOps information for that user id
	*/
	@WorkerThread
	public List<AppOpItem> getActiveAppOpsForUser(int userId) {
	List<AppOpItem> list = new ArrayList<>();
	synchronized (mActiveItems) {
	final int numActiveItems = mActiveItems.size();
	for (int i = 0; i < numActiveItems; i++) {
	AppOpItem item = mActiveItems.get(i);
	if ((userId == UserHandle.USER_ALL
	\|\| UserHandle.getUserId(item.getUid()) == userId)
	&& isUserVisible(item) && !item.isSilenced()) {
	list.add(item);
	}
	}
	}
	synchronized (mNotedItems) {
	final int numNotedItems = mNotedItems.size();
	for (int i = 0; i < numNotedItems; i++) {
	AppOpItem item = mNotedItems.get(i);
	if ((userId == UserHandle.USER_ALL
	\|\| UserHandle.getUserId(item.getUid()) == userId)
	&& isUserVisible(item)) {
	list.add(item);
	}
	}
	}
	return list;
	}

	private void notifySuscribers(int code, int uid, String packageName, boolean active) {
	mBGHandler.post(() -> notifySuscribersWorker(code, uid, packageName, active));
	}

	@Override
	public void onOpActiveChanged(int code, int uid, String packageName, boolean active) {
	if (DEBUG) {
	Log.w(TAG, String.format("onActiveChanged(%d,%d,%s,%s", code, uid, packageName,
	Boolean.toString(active)));
	}
	boolean activeChanged = updateActives(code, uid, packageName, active);
	if (!activeChanged) return; // early return
	// Check if the item is also noted, in that case, there's no update.
	boolean alsoNoted;
	synchronized (mNotedItems) {
	alsoNoted = getAppOpItemLocked(mNotedItems, code, uid, packageName) != null;
	}
	// If active is true, we only send the update if the op is not actively noted (already true)
	// If active is false, we only send the update if the op is not actively noted (prevent
	// early removal)
	if (!alsoNoted) {
	notifySuscribers(code, uid, packageName, active);
	}
	}

	@Override
	public void onOpNoted(int code, int uid, String packageName, int result) {
	if (DEBUG) {
	Log.w(TAG, "Noted op: " + code + " with result "
	+ AppOpsManager.MODE_NAMES[result] + " for package " + packageName);
	}
	if (result != AppOpsManager.MODE_ALLOWED) return;
	boolean notedAdded = addNoted(code, uid, packageName);
	if (!notedAdded) return; // early return
	boolean alsoActive;
	synchronized (mActiveItems) {
	alsoActive = getAppOpItemLocked(mActiveItems, code, uid, packageName) != null;
	}
	if (!alsoActive) {
	notifySuscribers(code, uid, packageName, true);
	}
	}

	private void notifySuscribersWorker(int code, int uid, String packageName, boolean active) {
	if (mCallbacksByCode.containsKey(code) && isUserVisible(code, uid, packageName)) {
	if (DEBUG) Log.d(TAG, "Notifying of change in package " + packageName);
	for (Callback cb: mCallbacksByCode.get(code)) {
	cb.onActiveStateChanged(code, uid, packageName, active);
	}
	}
	}

	@Override
	public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
	pw.println("AppOpsController state:");
	pw.println(" Listening: " + mListening);
	pw.println(" Active Items:");
	for (int i = 0; i < mActiveItems.size(); i++) {
	final AppOpItem item = mActiveItems.get(i);
	pw.print(" "); pw.println(item.toString());
	}
	pw.println(" Noted Items:");
	for (int i = 0; i < mNotedItems.size(); i++) {
	final AppOpItem item = mNotedItems.get(i);
	pw.print(" "); pw.println(item.toString());
	}

	}

	private boolean isAnyRecordingPausedLocked(int uid) {
	if (mMicMuted) {
	return true;
	}
	List<AudioRecordingConfiguration> configs = mRecordingsByUid.get(uid);
	if (configs == null) return false;
	int configsNum = configs.size();
	for (int i = 0; i < configsNum; i++) {
	AudioRecordingConfiguration config = configs.get(i);
	if (config.isClientSilenced()) return true;
	}
	return false;
	}

	private void updateRecordingPausedStatus() {
	synchronized (mActiveItems) {
	int size = mActiveItems.size();
	for (int i = 0; i < size; i++) {
	AppOpItem item = mActiveItems.get(i);
	if (item.getCode() == AppOpsManager.OP_RECORD_AUDIO) {
	boolean paused = isAnyRecordingPausedLocked(item.getUid());
	if (item.isSilenced() != paused) {
	item.setSilenced(paused);
	notifySuscribers(
	item.getCode(),
	item.getUid(),
	item.getPackageName(),
	!item.isSilenced()
	);
	}
	}
	}
	}
	}

	private AudioManager.AudioRecordingCallback mAudioRecordingCallback =
	new AudioManager.AudioRecordingCallback() {
	@Override
	public void onRecordingConfigChanged(List<AudioRecordingConfiguration> configs) {
	synchronized (mActiveItems) {
	mRecordingsByUid.clear();
	final int recordingsCount = configs.size();
	for (int i = 0; i < recordingsCount; i++) {
	AudioRecordingConfiguration recording = configs.get(i);

	ArrayList<AudioRecordingConfiguration> recordings = mRecordingsByUid.get(
	recording.getClientUid());
	if (recordings == null) {
	recordings = new ArrayList<>();
	mRecordingsByUid.put(recording.getClientUid(), recordings);
	}
	recordings.add(recording);
	}
	}
	updateRecordingPausedStatus();
	}
	};

	@Override
	public void onReceive(Context context, Intent intent) {
	mMicMuted = mAudioManager.isMicrophoneMute();
	updateRecordingPausedStatus();
	}

	protected class H extends Handler {
	H(Looper looper) {
	super(looper);
	}

	public void scheduleRemoval(AppOpItem item, long timeToRemoval) {
	removeCallbacksAndMessages(item);
	postDelayed(new Runnable() {
	@Override
	public void run() {
	removeNoted(item.getCode(), item.getUid(), item.getPackageName());
	}
	}, item, timeToRemoval);
	}
	}
	}