NetworkConnectedController.java revision 188b6fb0e5da3723f28c23289b5b55086210e82c 
1/*
2 * Copyright 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package androidx.work.impl.constraints.controllers;
18
19import static androidx.work.NetworkType.CONNECTED;
20
21import android.content.Context;
22import android.os.Build;
23import android.support.annotation.NonNull;
24
25import androidx.work.impl.constraints.NetworkState;
26import androidx.work.impl.constraints.trackers.Trackers;
27import androidx.work.impl.model.WorkSpec;
28
29/**
30 * A {@link ConstraintController} for monitoring that any usable network connection is available.
31 * <p>
32 * For API 26 and above, usable means that the {@link NetworkState} is validated, i.e.
33 * it has a working internet connection.
34 * <p>
35 * For API 25 and below, usable simply means that {@link NetworkState} is connected.
36 */
37
38public class NetworkConnectedController extends ConstraintController<NetworkState> {
39    public NetworkConnectedController(Context context, OnConstraintUpdatedCallback callback) {
40        super(Trackers.getInstance(context).getNetworkStateTracker(), callback);
41    }
42
43    @Override
44    boolean hasConstraint(@NonNull WorkSpec workSpec) {
45        return workSpec.getConstraints().getRequiredNetworkType() == CONNECTED;
46    }
47
48    @Override
49    boolean isConstrained(@NonNull NetworkState state) {
50        if (Build.VERSION.SDK_INT >= 26) {
51            return !state.isConnected() || !state.isValidated();
52        } else {
53            return !state.isConnected();
54        }
55    }
56}
57