1 /*
2  * Copyright (C) 2018 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.connecteddevice.usb;
18 
19 import android.content.Context;
20 import android.os.Handler;
21 
22 import androidx.annotation.UiThread;
23 import androidx.annotation.VisibleForTesting;
24 
25 import com.android.settings.core.PreferenceControllerMixin;
26 import com.android.settingslib.core.AbstractPreferenceController;
27 
28 /**
29  * This class provides common members and refresh functionality for usb controllers.
30  */
31 public abstract class UsbDetailsController extends AbstractPreferenceController
32         implements PreferenceControllerMixin {
33 
34     protected final Context mContext;
35     protected final UsbDetailsFragment mFragment;
36     protected final UsbBackend mUsbBackend;
37 
38     @VisibleForTesting
39     Handler mHandler;
40 
UsbDetailsController(Context context, UsbDetailsFragment fragment, UsbBackend backend)41     public UsbDetailsController(Context context, UsbDetailsFragment fragment, UsbBackend backend) {
42         super(context);
43         mContext = context;
44         mFragment = fragment;
45         mUsbBackend = backend;
46         mHandler = new Handler(context.getMainLooper());
47     }
48 
49     @Override
isAvailable()50     public boolean isAvailable() {
51         return true;
52     }
53 
54     /**
55      * Called when the USB state has changed, so that this component can be refreshed.
56      *
57      * @param connected Whether USB is connected
58      * @param functions A mask of the currently enabled functions
59      * @param powerRole The current power role
60      * @param dataRole The current data role
61      */
62     @UiThread
refresh(boolean connected, long functions, int powerRole, int dataRole)63     protected abstract void refresh(boolean connected, long functions, int powerRole, int dataRole);
64 }
65