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.UsbPort; 24 import android.hardware.usb.UsbPortStatus; 25 26 import com.android.settingslib.core.lifecycle.LifecycleObserver; 27 import com.android.settingslib.core.lifecycle.events.OnResume; 28 import com.android.settingslib.core.lifecycle.events.OnPause; 29 30 /** 31 * Receiver to receive usb update and use {@link UsbConnectionListener} to invoke callback 32 */ 33 public class UsbConnectionBroadcastReceiver extends BroadcastReceiver implements LifecycleObserver, 34 OnResume, OnPause { 35 private Context mContext; 36 private UsbConnectionListener mUsbConnectionListener; 37 private boolean mListeningToUsbEvents; 38 private UsbBackend mUsbBackend; 39 40 private boolean mConnected; 41 private long mFunctions; 42 private int mDataRole; 43 private int mPowerRole; 44 UsbConnectionBroadcastReceiver(Context context, UsbConnectionListener usbConnectionListener, UsbBackend backend)45 public UsbConnectionBroadcastReceiver(Context context, 46 UsbConnectionListener usbConnectionListener, UsbBackend backend) { 47 mContext = context; 48 mUsbConnectionListener = usbConnectionListener; 49 mUsbBackend = backend; 50 51 mFunctions = UsbManager.FUNCTION_NONE; 52 mDataRole = UsbPort.DATA_ROLE_NONE; 53 mPowerRole = UsbPort.POWER_ROLE_NONE; 54 } 55 56 @Override onReceive(Context context, Intent intent)57 public void onReceive(Context context, Intent intent) { 58 if (UsbManager.ACTION_USB_STATE.equals(intent.getAction())) { 59 mConnected = intent.getExtras().getBoolean(UsbManager.USB_CONNECTED) 60 || intent.getExtras().getBoolean(UsbManager.USB_HOST_CONNECTED); 61 if (mConnected) { 62 long functions = UsbManager.FUNCTION_NONE; 63 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_MTP) 64 && intent.getExtras().getBoolean(UsbManager.USB_DATA_UNLOCKED, false)) { 65 functions |= UsbManager.FUNCTION_MTP; 66 } 67 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_PTP) 68 && intent.getExtras().getBoolean(UsbManager.USB_DATA_UNLOCKED, false)) { 69 functions |= UsbManager.FUNCTION_PTP; 70 } 71 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_MIDI)) { 72 functions |= UsbManager.FUNCTION_MIDI; 73 } 74 if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_RNDIS)) { 75 functions |= UsbManager.FUNCTION_RNDIS; 76 } 77 mFunctions = functions; 78 mDataRole = mUsbBackend.getDataRole(); 79 mPowerRole = mUsbBackend.getPowerRole(); 80 } 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