1 /*
2  * Copyright (C) 2020 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 
17 package com.android.settings.network;
18 
19 import android.content.Context;
20 import android.net.EthernetManager;
21 import android.net.TetheringManager;
22 import android.os.Handler;
23 import android.os.Looper;
24 import android.text.TextUtils;
25 
26 import androidx.lifecycle.Lifecycle;
27 import androidx.lifecycle.OnLifecycleEvent;
28 
29 import com.android.internal.annotations.VisibleForTesting;
30 
31 /**
32  * This controller helps to manage the switch state and visibility of ethernet tether switch
33  * preference.
34  */
35 public final class EthernetTetherPreferenceController extends TetherBasePreferenceController {
36 
37     private final String mEthernetRegex;
38     private final EthernetManager mEthernetManager;
39     @VisibleForTesting
40     EthernetManager.Listener mEthernetListener;
41 
EthernetTetherPreferenceController(Context context, String preferenceKey)42     public EthernetTetherPreferenceController(Context context, String preferenceKey) {
43         super(context, preferenceKey);
44         mEthernetRegex = context.getString(
45                 com.android.internal.R.string.config_ethernet_iface_regex);
46         mEthernetManager = (EthernetManager) context.getSystemService(Context.ETHERNET_SERVICE);
47     }
48 
49     @OnLifecycleEvent(Lifecycle.Event.ON_START)
onStart()50     public void onStart() {
51         mEthernetListener = new EthernetManager.Listener() {
52             @Override
53             public void onAvailabilityChanged(String iface, boolean isAvailable) {
54                 new Handler(Looper.getMainLooper()).post(() -> updateState(mPreference));
55             }
56         };
57         mEthernetManager.addListener(mEthernetListener);
58     }
59 
60     @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
onStop()61     public void onStop() {
62         mEthernetManager.removeListener(mEthernetListener);
63         mEthernetListener = null;
64     }
65 
66     @Override
shouldEnable()67     public boolean shouldEnable() {
68         String[] available = mCm.getTetherableIfaces();
69         for (String s : available) {
70             if (s.matches(mEthernetRegex)) {
71                 return true;
72             }
73         }
74         return false;
75     }
76 
77     @Override
shouldShow()78     public boolean shouldShow() {
79         return !TextUtils.isEmpty(mEthernetRegex);
80     }
81 
82     @Override
getTetherType()83     public int getTetherType() {
84         return TetheringManager.TETHERING_ETHERNET;
85     }
86 }
87