Files
app_Settings/src/com/android/settings/network/helper/ServiceStateStatus.java
Bonian Chen e7de4a415d [Settings] Code refactor for monitoring service state
This is for monitoring the status of service state when Lifecycle state
STARTED or RESUMED.

Bug: 229689535
Test: unit test
Change-Id: If6bac5c04caae67d6293c5a69e3130789e9e588e
2022-04-22 13:54:54 +08:00

105 lines
3.5 KiB
Java

/*
* Copyright (C) 2022 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.settings.network.helper;
import android.telephony.ServiceState;
import android.telephony.TelephonyCallback;
import android.telephony.TelephonyManager;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.VisibleForTesting;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LiveData;
import java.util.concurrent.Executor;
import java.util.function.Consumer;
/**
* A {@link LiveData} as a mapping of allowed network types reported from {@link TelephonyCallback}.
* Only got update when Lifecycle.State is considered as STARTED or RESUMED.
*
* {@code null} when status unknown. Other values are {@link ServiceState}.
*/
@VisibleForTesting
public class ServiceStateStatus extends LiveData<ServiceState> {
private static final String TAG = "ServiceStateStatus";
@VisibleForTesting
protected ServiceStateProducer mServiceStateProducer;
@VisibleForTesting
protected LifecycleCallbackTelephonyAdapter mAdapter;
@VisibleForTesting
protected Consumer<ServiceState> mLiveDataUpdater = status -> setValue(status);
/**
* Constructor
* @param lifecycle {@link Lifecycle} to monitor
* @param telephonyManager {@link TelephonyManager} to interact with
* @param executor {@link Executor} for receiving the notify from telephony framework.
*/
@VisibleForTesting
public ServiceStateStatus(@NonNull Lifecycle lifecycle,
@NonNull TelephonyManager telephonyManager, Executor executor) {
super();
mServiceStateProducer = new ServiceStateProducer(this);
mAdapter = new LifecycleCallbackTelephonyAdapter<ServiceState>(lifecycle,
telephonyManager, mServiceStateProducer, executor, mLiveDataUpdater) {
@Override
public void setCallbackActive(boolean isActive) {
super.setCallbackActive(isActive);
if (!isActive) {
/**
* Set to unknown status when no longer actively monitoring
* {@link TelephonyCallback}.
*/
mLiveDataUpdater.accept(null);
}
}
};
}
/**
* An implementation of TelephonyCallback.
*
* Change of allowed network type will be forward to
* {@link LifecycleCallbackTelephonyAdapter}.
*/
@VisibleForTesting
protected static class ServiceStateProducer extends TelephonyCallback
implements TelephonyCallback.ServiceStateListener {
private final ServiceStateStatus mStatus;
/**
* Constructor
* @param status {@link ServiceStateStatus}
*/
public ServiceStateProducer(ServiceStateStatus status) {
mStatus = status;
}
@Override
public void onServiceStateChanged(ServiceState serviceState) {
mStatus.mAdapter.postResult(serviceState);
}
}
}