NetworkMeteredController.java
/*
* Copyright 2017 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 androidx.work.impl.constraints.controllers;
import static androidx.work.NetworkType.METERED;
import android.content.Context;
import android.os.Build;
import androidx.annotation.NonNull;
import androidx.work.Logger;
import androidx.work.impl.constraints.NetworkState;
import androidx.work.impl.constraints.trackers.Trackers;
import androidx.work.impl.model.WorkSpec;
import androidx.work.impl.utils.taskexecutor.TaskExecutor;
/**
* A {@link ConstraintController} for monitoring that the network connection is metered.
*/
public class NetworkMeteredController extends ConstraintController<NetworkState> {
private static final String TAG = Logger.tagWithPrefix("NetworkMeteredCtrlr");
public NetworkMeteredController(Context context, TaskExecutor taskExecutor) {
super(Trackers.getInstance(context, taskExecutor).getNetworkStateTracker());
}
@Override
boolean hasConstraint(@NonNull WorkSpec workSpec) {
return workSpec.constraints.getRequiredNetworkType() == METERED;
}
/**
* Check for metered constraint on API 26+, when JobInfo#NETWORK_METERED was added, to
* be consistent with JobScheduler functionality.
*/
@Override
boolean isConstrained(@NonNull NetworkState state) {
if (Build.VERSION.SDK_INT < 26) {
Logger.get().debug(TAG, "Metered network constraint is not supported before API 26, "
+ "only checking for connected state.");
return !state.isConnected();
}
return !state.isConnected() || !state.isMetered();
}
}