1 /* 2 * Copyright (C) 2015 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.server.telecom; 18 19 import android.app.UiModeManager; 20 import android.content.BroadcastReceiver; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.IntentFilter; 24 import android.content.res.Configuration; 25 26 import java.util.Set; 27 import java.util.concurrent.CopyOnWriteArraySet; 28 29 /** 30 * Provides various system states to the rest of the telecom codebase. So far, that's only car-mode. 31 */ 32 public class SystemStateProvider { 33 34 public static interface SystemStateListener { onCarModeChanged(boolean isCarMode)35 public void onCarModeChanged(boolean isCarMode); 36 } 37 38 private final Context mContext; 39 private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { 40 @Override 41 public void onReceive(Context context, Intent intent) { 42 Log.startSession("SSP.oR"); 43 try { 44 String action = intent.getAction(); 45 if (UiModeManager.ACTION_ENTER_CAR_MODE.equals(action)) { 46 onEnterCarMode(); 47 } else if (UiModeManager.ACTION_EXIT_CAR_MODE.equals(action)) { 48 onExitCarMode(); 49 } else { 50 Log.w(this, "Unexpected intent received: %s", intent.getAction()); 51 } 52 } finally { 53 Log.endSession(); 54 } 55 } 56 }; 57 58 private Set<SystemStateListener> mListeners = new CopyOnWriteArraySet<>(); 59 private boolean mIsCarMode; 60 SystemStateProvider(Context context)61 public SystemStateProvider(Context context) { 62 mContext = context; 63 64 IntentFilter intentFilter = new IntentFilter(UiModeManager.ACTION_ENTER_CAR_MODE); 65 intentFilter.addAction(UiModeManager.ACTION_EXIT_CAR_MODE); 66 mContext.registerReceiver(mBroadcastReceiver, intentFilter); 67 Log.i(this, "Registering car mode receiver: %s", intentFilter); 68 69 mIsCarMode = getSystemCarMode(); 70 } 71 addListener(SystemStateListener listener)72 public void addListener(SystemStateListener listener) { 73 if (listener != null) { 74 mListeners.add(listener); 75 } 76 } 77 removeListener(SystemStateListener listener)78 public boolean removeListener(SystemStateListener listener) { 79 return mListeners.remove(listener); 80 } 81 isCarMode()82 public boolean isCarMode() { 83 return mIsCarMode; 84 } 85 onEnterCarMode()86 private void onEnterCarMode() { 87 if (!mIsCarMode) { 88 Log.i(this, "Entering carmode"); 89 mIsCarMode = true; 90 notifyCarMode(); 91 } 92 } 93 onExitCarMode()94 private void onExitCarMode() { 95 if (mIsCarMode) { 96 Log.i(this, "Exiting carmode"); 97 mIsCarMode = false; 98 notifyCarMode(); 99 } 100 } 101 notifyCarMode()102 private void notifyCarMode() { 103 for (SystemStateListener listener : mListeners) { 104 listener.onCarModeChanged(mIsCarMode); 105 } 106 } 107 108 /** 109 * Checks the system for the current car mode. 110 * 111 * @return True if in car mode, false otherwise. 112 */ getSystemCarMode()113 private boolean getSystemCarMode() { 114 UiModeManager uiModeManager = 115 (UiModeManager) mContext.getSystemService(Context.UI_MODE_SERVICE); 116 117 if (uiModeManager != null) { 118 return uiModeManager.getCurrentModeType() == Configuration.UI_MODE_TYPE_CAR; 119 } 120 121 return false; 122 } 123 } 124