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 mFunctions = functions; 76 mDataRole = mUsbBackend.getDataRole(); 77 mPowerRole = mUsbBackend.getPowerRole(); 78 } else if (UsbManager.ACTION_USB_PORT_CHANGED.equals(intent.getAction())) { 79 UsbPortStatus portStatus = intent.getExtras() 80 .getParcelable(UsbManager.EXTRA_PORT_STATUS); 81 if (portStatus != null) { 82 mDataRole = portStatus.getCurrentDataRole(); 83 mPowerRole = portStatus.getCurrentPowerRole(); 84 } 85 } 86 if (mUsbConnectionListener != null) { 87 mUsbConnectionListener.onUsbConnectionChanged(mConnected, mFunctions, mPowerRole, 88 mDataRole); 89 } 90 } 91 register()92 public void register() { 93 if (!mListeningToUsbEvents) { 94 mConnected = false; 95 final IntentFilter intentFilter = new IntentFilter(); 96 intentFilter.addAction(UsbManager.ACTION_USB_STATE); 97 intentFilter.addAction(UsbManager.ACTION_USB_PORT_CHANGED); 98 final Intent intent = mContext.registerReceiver(this, intentFilter); 99 // TODO b/77240599 use an api instead of sticky intent 100 if (intent != null) { 101 onReceive(mContext, intent); 102 } 103 mListeningToUsbEvents = true; 104 } 105 } 106 unregister()107 public void unregister() { 108 if (mListeningToUsbEvents) { 109 mContext.unregisterReceiver(this); 110 mListeningToUsbEvents = false; 111 } 112 } 113 isConnected()114 public boolean isConnected() { 115 return mConnected; 116 } 117 118 @Override onResume()119 public void onResume() { 120 register(); 121 } 122 123 @Override onPause()124 public void onPause() { 125 unregister(); 126 } 127 128 /** 129 * Interface definition for a callback to be invoked when usb connection is changed. 130 */ 131 interface UsbConnectionListener { onUsbConnectionChanged(boolean connected, long functions, int powerRole, int dataRole)132 void onUsbConnectionChanged(boolean connected, long functions, int powerRole, int dataRole); 133 } 134 } 135