src/com/android/settings/development/SelectUsbConfigPreferenceController.java

   1 /*
   2  * Copyright (C) 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
  17 package com.android.settings.development;
  18
  19 import android.content.BroadcastReceiver;
  20 import android.content.Context;
  21 import android.content.Intent;
  22 import android.content.IntentFilter;
  23 import android.content.pm.PackageManager;
  24 import android.hardware.usb.UsbManager;
  25 import android.os.Bundle;
  26 import android.support.annotation.VisibleForTesting;
  27 import android.support.v7.preference.ListPreference;
  28 import android.support.v7.preference.Preference;
  29 import android.support.v7.preference.PreferenceScreen;
  30
  31 import com.android.settings.R;
  32 import com.android.settings.Utils;
  33 import com.android.settings.core.PreferenceControllerMixin;
  34 import com.android.settings.connecteddevice.usb.UsbBackend;
  35 import com.android.settingslib.core.lifecycle.Lifecycle;
  36 import com.android.settingslib.core.lifecycle.LifecycleObserver;
  37 import com.android.settingslib.core.lifecycle.events.OnCreate;
  38 import com.android.settingslib.core.lifecycle.events.OnDestroy;
  39 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
  40
  41 public class SelectUsbConfigPreferenceController extends
  42         DeveloperOptionsPreferenceController implements
  43         Preference.OnPreferenceChangeListener, LifecycleObserver, OnCreate, OnDestroy,
  44         PreferenceControllerMixin {
  45
  46     private static final String USB_CONFIGURATION_KEY = "select_usb_configuration";
  47
  48     private final String[] mListValues;
  49     private final String[] mListSummaries;
  50     private final UsbManager mUsbManager;
  51     @VisibleForTesting
  52     UsbBackend.UsbManagerPassThrough mUsbManagerPassThrough;
  53     private BroadcastReceiver mUsbReceiver;
  54     private ListPreference mPreference;
  55
  56     public SelectUsbConfigPreferenceController(Context context, Lifecycle lifecycle) {
  57         super(context);
  58
  59         mListValues = context.getResources().getStringArray(R.array.usb_configuration_values);
  60         mListSummaries = context.getResources().getStringArray(R.array.usb_configuration_titles);
  61         mUsbManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
  62         mUsbManagerPassThrough = new UsbBackend.UsbManagerPassThrough(mUsbManager);
  63         mUsbReceiver = new BroadcastReceiver() {
  64             @Override
  65             public void onReceive(Context context, Intent intent) {
  66                 if (mPreference != null) {
  67                     updateUsbConfigurationValues();
  68                 }
  69             }
  70         };
  71         if (lifecycle != null) {
  72             lifecycle.addObserver(this);
  73         }
  74     }
  75
  76     @Override
  77     public void onCreate(Bundle savedInstanceState) {
  78         IntentFilter filter = new IntentFilter();
  79         filter.addAction(UsbManager.ACTION_USB_STATE);
  80         mContext.registerReceiver(mUsbReceiver, filter);
  81     }
  82
  83     @Override
  84     public String getPreferenceKey() {
  85         return USB_CONFIGURATION_KEY;
  86     }
  87
  88     @Override
  89     public void displayPreference(PreferenceScreen screen) {
  90         super.displayPreference(screen);
  91
  92         mPreference = (ListPreference) screen.findPreference(getPreferenceKey());
  93     }
  94
  95     @Override
  96     public boolean onPreferenceChange(Preference preference, Object newValue) {
  97         if (Utils.isMonkeyRunning()) {
  98             return false;
  99         }
 100
 101         writeUsbConfigurationOption(mUsbManagerPassThrough
 102                 .usbFunctionsFromString(newValue.toString()));
 103         updateUsbConfigurationValues();
 104         return true;
 105     }
 106
 107     @Override
 108     public void updateState(Preference preference) {
 109         updateUsbConfigurationValues();
 110     }
 111
 112     @Override
 113     public void onDestroy() {
 114         mContext.unregisterReceiver(mUsbReceiver);
 115     }
 116
 117     @Override
 118     public boolean isAvailable() {
 119         final PackageManager packageManager = mContext.getPackageManager();
 120
 121         return packageManager.hasSystemFeature(PackageManager.FEATURE_USB_HOST)
 122                 || packageManager.hasSystemFeature(PackageManager.FEATURE_USB_ACCESSORY);
 123     }
 124
 125     @Override
 126     protected void onDeveloperOptionsSwitchEnabled() {
 127         mPreference.setEnabled(true);
 128     }
 129
 130     @Override
 131     protected void onDeveloperOptionsSwitchDisabled() {
 132         mPreference.setEnabled(false);
 133     }
 134
 135     @VisibleForTesting
 136     void setCurrentFunctions(long functions) {
 137         mUsbManager.setCurrentFunctions(functions);
 138     }
 139
 140     private void updateUsbConfigurationValues() {
 141         long functions = mUsbManagerPassThrough.getCurrentFunctions();
 142         int index = 0;
 143         for (int i = 0; i < mListValues.length; i++) {
 144             if (functions == mUsbManagerPassThrough.usbFunctionsFromString(mListValues[i])) {
 145                 index = i;
 146                 break;
 147             }
 148         }
 149         mPreference.setValue(mListValues[index]);
 150         mPreference.setSummary(mListSummaries[index]);
 151     }
 152
 153     private void writeUsbConfigurationOption(long newValue) {
 154         setCurrentFunctions(newValue);
 155     }
 156 }