| /* |
| * Copyright (C) 2021 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.telephony; |
| |
| import android.telephony.PhoneStateListener; |
| import android.telephony.TelephonyCallback.ActiveDataSubscriptionIdListener; |
| import android.telephony.TelephonyCallback.CallStateListener; |
| import android.telephony.TelephonyCallback.ServiceStateListener; |
| import android.telephony.TelephonyManager; |
| |
| import com.android.systemui.dagger.SysUISingleton; |
| import com.android.systemui.dagger.qualifiers.Main; |
| |
| import java.util.concurrent.Executor; |
| |
| import javax.inject.Inject; |
| |
| /** |
| * Wrapper around {@link TelephonyManager#listen(PhoneStateListener, int)}. |
| * |
| * The TelephonyManager complains if too many places in code register a listener. This class |
| * encapsulates SystemUI's usage of this function, reducing it down to a single listener. |
| * |
| * See also |
| * {@link TelephonyManager#registerTelephonyCallback(Executor, android.telephony.TelephonyCallback)} |
| */ |
| @SysUISingleton |
| public class TelephonyListenerManager { |
| private final TelephonyManager mTelephonyManager; |
| private final Executor mExecutor; |
| private final TelephonyCallback mTelephonyCallback; |
| |
| private boolean mListening = false; |
| |
| @Inject |
| public TelephonyListenerManager( |
| TelephonyManager telephonyManager, |
| @Main Executor executor, |
| TelephonyCallback telephonyCallback) { |
| mTelephonyManager = telephonyManager; |
| mExecutor = executor; |
| mTelephonyCallback = telephonyCallback; |
| } |
| |
| /** */ |
| public void addActiveDataSubscriptionIdListener(ActiveDataSubscriptionIdListener listener) { |
| mTelephonyCallback.addActiveDataSubscriptionIdListener(listener); |
| updateListening(); |
| } |
| |
| /** */ |
| public void removeActiveDataSubscriptionIdListener(ActiveDataSubscriptionIdListener listener) { |
| mTelephonyCallback.removeActiveDataSubscriptionIdListener(listener); |
| updateListening(); |
| } |
| |
| /** */ |
| public void addCallStateListener(CallStateListener listener) { |
| mTelephonyCallback.addCallStateListener(listener); |
| updateListening(); |
| } |
| |
| /** */ |
| public void removeCallStateListener(CallStateListener listener) { |
| mTelephonyCallback.removeCallStateListener(listener); |
| updateListening(); |
| } |
| |
| /** */ |
| public void addServiceStateListener(ServiceStateListener listener) { |
| mTelephonyCallback.addServiceStateListener(listener); |
| updateListening(); |
| } |
| |
| /** */ |
| public void removeServiceStateListener(ServiceStateListener listener) { |
| mTelephonyCallback.removeServiceStateListener(listener); |
| updateListening(); |
| } |
| |
| |
| private void updateListening() { |
| if (!mListening && mTelephonyCallback.hasAnyListeners()) { |
| mListening = true; |
| mTelephonyManager.registerTelephonyCallback(mExecutor, mTelephonyCallback); |
| } else if (mListening && !mTelephonyCallback.hasAnyListeners()) { |
| mTelephonyManager.unregisterTelephonyCallback(mTelephonyCallback); |
| mListening = false; |
| } |
| } |
| } |