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      1 /*
      2  * Copyright (C) 2016 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 package com.google.android.car.kitchensink.setting;
     17 
     18 import android.annotation.Nullable;
     19 import android.content.Context;
     20 import android.hardware.usb.UsbDevice;
     21 import android.hardware.usb.UsbManager;
     22 import android.os.Bundle;
     23 import android.preference.Preference;
     24 import android.preference.PreferenceCategory;
     25 import android.preference.PreferenceFragment;
     26 import android.preference.PreferenceGroup;
     27 import android.util.Log;
     28 
     29 import com.google.android.car.kitchensink.R;
     30 import com.google.android.car.kitchensink.setting.usb.UsbDevicePreference;
     31 import com.google.android.car.kitchensink.setting.usb.UsbDeviceSettings;
     32 import com.google.android.car.kitchensink.setting.usb.UsbSettingsStorage;
     33 
     34 import java.util.HashMap;
     35 import java.util.List;
     36 
     37 /**
     38  * Usb manager handles management for USB device settings.
     39  */
     40 public class UsbManagerFragment extends PreferenceFragment
     41         implements UsbDevicePreference.UsbDevicePreferenceCallback {
     42 
     43     // TODO: for produciton settings version we need to handle detach through broadcast.
     44 
     45     private static final String TAG = UsbManagerFragment.class.getSimpleName();
     46     private static final boolean LOCAL_LOGD = true;
     47     private static final boolean LOCAL_LOGV = true;
     48 
     49     private UsbSettingsStorage mUsbSettingsStorage;
     50     private UsbManager mUsbManager;
     51 
     52     @Override
     53     public void onCreate(Bundle savedInstanceState) {
     54         super.onCreate(savedInstanceState);
     55         addPreferencesFromResource(R.xml.usb_manager_prefs);
     56         mUsbSettingsStorage = new UsbSettingsStorage(getContext());
     57         mUsbManager = (UsbManager) getActivity().getSystemService(Context.USB_SERVICE);
     58     }
     59 
     60     @Override
     61     public void onResume() {
     62         super.onResume();
     63         populateSettings();
     64     }
     65 
     66     private void populateSettings() {
     67         getPreferenceScreen().removeAll();
     68         HashMap<String, UsbDevice> attachedDevices = mUsbManager.getDeviceList();
     69         List<UsbDeviceSettings> allSavedSettings = mUsbSettingsStorage.getAllSettings();
     70         PreferenceGroup availableDevicesCategory =
     71                 createPreferenceCategory(1, R.string.usb_available_devices);
     72         getPreferenceScreen().addPreference(availableDevicesCategory);
     73 
     74         PreferenceGroup savedDevicesCategory =
     75                 createPreferenceCategory(2, R.string.usb_saved_devices);
     76         getPreferenceScreen().addPreference(savedDevicesCategory);
     77 
     78         for (UsbDevice attachedDevice : attachedDevices.values()) {
     79             if (LOCAL_LOGD) {
     80                 Log.d(TAG, "Attached device: " + attachedDevice);
     81             }
     82             if (attachedDevice.getSerialNumber() == null) {
     83                 if (LOCAL_LOGV) {
     84                     Log.v(TAG, "Attached device: " + attachedDevice + " misseshave serial number");
     85                 }
     86                 continue;
     87             }
     88             UsbDeviceSettings deviceSettings = getSavedSetting(allSavedSettings, attachedDevice);
     89             if (deviceSettings != null) {
     90                 // This might be slow if there are a lot of settings.
     91                 allSavedSettings.remove(deviceSettings);
     92             } else {
     93                 deviceSettings = UsbDeviceSettings.constructSettings(attachedDevice);
     94             }
     95             UsbDevicePreference preference = new UsbDevicePreference(
     96                     getContext(), deviceSettings, this);
     97             availableDevicesCategory.addPreference(preference);
     98         }
     99         availableDevicesCategory.setEnabled(availableDevicesCategory.getPreferenceCount() > 0);
    100 
    101         for (UsbDeviceSettings savedSettings : allSavedSettings) {
    102             UsbDevicePreference preference = new UsbDevicePreference(
    103                     getContext(), savedSettings, this);
    104             savedDevicesCategory.addPreference(preference);
    105         }
    106         savedDevicesCategory.setEnabled(savedDevicesCategory.getPreferenceCount() > 0);
    107     }
    108 
    109     private PreferenceGroup createPreferenceCategory(int order, int titleId) {
    110         PreferenceGroup preferenceGroup = new PreferenceCategory(getContext());
    111         preferenceGroup.setTitle(titleId);
    112         preferenceGroup.setOrder(order);
    113         preferenceGroup.setSelectable(false);
    114         return preferenceGroup;
    115     }
    116 
    117     @Nullable
    118     private UsbDeviceSettings getSavedSetting(List<UsbDeviceSettings> settings, UsbDevice device) {
    119         for (UsbDeviceSettings savedSetting : settings) {
    120             if (savedSetting.matchesDevice(device)) {
    121                 return savedSetting;
    122             }
    123         }
    124         return null;
    125     }
    126 
    127     @Override
    128     public void onUsbDevicePreferenceDelete(Preference preference, UsbDeviceSettings settings) {
    129         mUsbSettingsStorage.deleteSettings(
    130                 settings.getSerialNumber(), settings.getVid(), settings.getPid());
    131         populateSettings();
    132     }
    133 
    134 }
    135