| /* |
| * 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.annotation.Nullable; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.Binder; |
| import android.os.PowerManager; |
| |
| import com.android.internal.util.Preconditions; |
| import com.android.server.FgThread; |
| |
| import java.util.Objects; |
| |
| /** |
| * Provides accessors and listeners for device stationary state. |
| */ |
| public class SystemDeviceIdleHelper extends DeviceIdleHelper { |
| |
| private final Context mContext; |
| |
| private PowerManager mPowerManager; |
| |
| private boolean mSystemReady; |
| private boolean mRegistrationRequired; |
| private @Nullable BroadcastReceiver mReceiver; |
| |
| public SystemDeviceIdleHelper(Context context) { |
| mContext = context; |
| } |
| |
| public synchronized void onSystemReady() { |
| mSystemReady = true; |
| mPowerManager = Objects.requireNonNull(mContext.getSystemService(PowerManager.class)); |
| onRegistrationStateChanged(); |
| } |
| |
| @Override |
| protected synchronized void registerInternal() { |
| mRegistrationRequired = true; |
| onRegistrationStateChanged(); |
| } |
| |
| @Override |
| protected synchronized void unregisterInternal() { |
| mRegistrationRequired = false; |
| onRegistrationStateChanged(); |
| } |
| |
| private void onRegistrationStateChanged() { |
| if (!mSystemReady) { |
| return; |
| } |
| |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| if (mRegistrationRequired && mReceiver == null) { |
| BroadcastReceiver receiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| notifyDeviceIdleChanged(); |
| } |
| }; |
| mContext.registerReceiver(receiver, |
| new IntentFilter(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED), null, |
| FgThread.getHandler()); |
| mReceiver = receiver; |
| } else if (!mRegistrationRequired && mReceiver != null) { |
| BroadcastReceiver receiver = mReceiver; |
| mReceiver = null; |
| mContext.unregisterReceiver(receiver); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| @Override |
| public boolean isDeviceIdle() { |
| Preconditions.checkState(mPowerManager != null); |
| return mPowerManager.isDeviceIdleMode(); |
| } |
| } |