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 package com.android.settings.connecteddevice.usb; 17 18 import android.content.BroadcastReceiver; 19 import android.content.Context; 20 import android.content.Intent; 21 import android.content.IntentFilter; 22 import android.hardware.usb.UsbManager; 23 import android.hardware.usb.UsbPortStatus; 24 25 import com.android.settingslib.core.lifecycle.LifecycleObserver; 26 import com.android.settingslib.core.lifecycle.events.OnPause; 27 import com.android.settingslib.core.lifecycle.events.OnResume; 28 29 /** 30 * Receiver to receive usb update and use {@link UsbConnectionListener} to invoke callback 31 */ 32 public class UsbConnectionBroadcastReceiver extends BroadcastReceiver implements LifecycleObserver, 33 OnResume, OnPause { 34 private Context mContext; 35 private UsbConnectionListener mUsbConnectionListener; 36 private boolean mListeningToUsbEvents; 37 private UsbBackend mUsbBackend; 38 39 private boolean mConnected; 40 private long mFunctions; 41 private int mDataRole; 42 private int mPowerRole; 43 UsbConnectionBroadcastReceiver(Context context, UsbConnectionListener usbConnectionListener, UsbBackend backend)44 public UsbConnectionBroadcastReceiver(Context context, 45 UsbConnectionListener usbConnectionListener, UsbBackend backend) { 46 mContext = context; 47 mUsbConnectionListener = usbConnectionListener; 48 mUsbBackend = backend; 49 50 mFunctions = UsbManager.FUNCTION_NONE; 51 mDataRole = UsbPortStatus.DATA_ROLE_NONE; 52 mPowerRole = UsbPortStatus.POWER_ROLE_NONE; 53 } 54 55 @Override onReceive(Context context, Intent intent)56 public void onReceive(Context context, Intent intent) { 57 if (UsbManager.ACTION_USB_STATE.equals(intent.getAction())) { 58 mConnected = intent.getExtras().getBoolean(UsbManager.USB_CONNECTED) 59 || intent.getExtras().getBoolean(UsbManager.USB_HOST_CONNECTED); 60 long functions = UsbManager.FUNCTION_NONE; 61 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_MTP) 62 && intent.getExtras().getBoolean(UsbManager.USB_DATA_UNLOCKED, false)) { 63 functions |= UsbManager.FUNCTION_MTP; 64 } 65 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_PTP) 66 && intent.getExtras().getBoolean(UsbManager.USB_DATA_UNLOCKED, false)) { 67 functions |= UsbManager.FUNCTION_PTP; 68 } 69 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_MIDI)) { 70 functions |= UsbManager.FUNCTION_MIDI; 71 } 72 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_RNDIS)) { 73 functions |= UsbManager.FUNCTION_RNDIS; 74 } 75 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_ACCESSORY)) { 76 functions |= UsbManager.FUNCTION_ACCESSORY; 77 } 78 mFunctions = functions; 79 mDataRole = mUsbBackend.getDataRole(); 80 mPowerRole = mUsbBackend.getPowerRole(); 81 } else if (UsbManager.ACTION_USB_PORT_CHANGED.equals(intent.getAction())) { 82 UsbPortStatus portStatus = intent.getExtras() 83 .getParcelable(UsbManager.EXTRA_PORT_STATUS); 84 if (portStatus != null) { 85 mDataRole = portStatus.getCurrentDataRole(); 86 mPowerRole = portStatus.getCurrentPowerRole(); 87 } 88 } 89 if (mUsbConnectionListener != null) { 90 mUsbConnectionListener.onUsbConnectionChanged(mConnected, mFunctions, mPowerRole, 91 mDataRole); 92 } 93 } 94 register()95 public void register() { 96 if (!mListeningToUsbEvents) { 97 mConnected = false; 98 final IntentFilter intentFilter = new IntentFilter(); 99 intentFilter.addAction(UsbManager.ACTION_USB_STATE); 100 intentFilter.addAction(UsbManager.ACTION_USB_PORT_CHANGED); 101 final Intent intent = mContext.registerReceiver(this, intentFilter); 102 // TODO b/77240599 use an api instead of sticky intent 103 if (intent != null) { 104 onReceive(mContext, intent); 105 } 106 mListeningToUsbEvents = true; 107 } 108 } 109 unregister()110 public void unregister() { 111 if (mListeningToUsbEvents) { 112 mContext.unregisterReceiver(this); 113 mListeningToUsbEvents = false; 114 } 115 } 116 isConnected()117 public boolean isConnected() { 118 return mConnected; 119 } 120 121 @Override onResume()122 public void onResume() { 123 register(); 124 } 125 126 @Override onPause()127 public void onPause() { 128 unregister(); 129 } 130 131 /** 132 * Interface definition for a callback to be invoked when usb connection is changed. 133 */ 134 interface UsbConnectionListener { onUsbConnectionChanged(boolean connected, long functions, int powerRole, int dataRole)135 void onUsbConnectionChanged(boolean connected, long functions, int powerRole, int dataRole); 136 } 137 } 138