1 /* 2 * Copyright (C) 2016 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.hardware.usb.aoapdevicetest; 17 18 import android.app.Activity; 19 import android.app.PendingIntent; 20 import android.content.BroadcastReceiver; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.IntentFilter; 24 import android.hardware.usb.UsbAccessory; 25 import android.hardware.usb.UsbManager; 26 import android.os.Bundle; 27 import android.os.ParcelFileDescriptor; 28 import android.util.Log; 29 30 import java.io.FileInputStream; 31 import java.io.FileOutputStream; 32 import java.io.IOException; 33 34 import libcore.io.IoUtils; 35 36 public class UsbAoapDeviceTestActivity extends Activity { 37 private static final String TAG = UsbAoapDeviceTestActivity.class.getSimpleName(); 38 private static final boolean DBG = true; 39 40 private static final String ACTION_USB_ACCESSORY_PERMISSION = 41 "com.android.hardware.usb.aoapdevicetest.ACTION_USB_ACCESSORY_PERMISSION"; 42 43 private UsbManager mUsbManager; 44 private AccessoryReceiver mReceiver; 45 private ParcelFileDescriptor mFd; 46 private ReaderThread mReaderThread; 47 private UsbAccessory mAccessory; 48 49 @Override 50 protected void onCreate(Bundle savedInstanceState) { 51 super.onCreate(savedInstanceState); 52 53 setContentView(R.layout.device); 54 55 mUsbManager = (UsbManager)getSystemService(Context.USB_SERVICE); 56 IntentFilter filter = new IntentFilter(); 57 filter.addAction(UsbManager.ACTION_USB_ACCESSORY_ATTACHED); 58 filter.addAction(UsbManager.ACTION_USB_ACCESSORY_DETACHED); 59 filter.addAction(ACTION_USB_ACCESSORY_PERMISSION); 60 mReceiver = new AccessoryReceiver(); 61 registerReceiver(mReceiver, filter); 62 63 Intent intent = getIntent(); 64 if (intent.getAction().equals(UsbManager.ACTION_USB_ACCESSORY_ATTACHED)) { 65 UsbAccessory accessory = 66 (UsbAccessory) intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY); 67 if (accessory != null) { 68 onAccessoryAttached(accessory); 69 } else { 70 throw new RuntimeException("USB accessory is null."); 71 } 72 } else { 73 finish(); 74 } 75 } 76 77 @Override 78 protected void onDestroy() { 79 super.onDestroy(); 80 unregisterReceiver(mReceiver); 81 IoUtils.closeQuietly(mFd); 82 if (mReaderThread != null) { 83 mReaderThread.requestToQuit(); 84 try { 85 mReaderThread.join(1000); 86 } catch (InterruptedException e) { 87 } 88 if (mReaderThread.isAlive()) { // reader thread stuck 89 Log.w(TAG, "ReaderThread still alive"); 90 } 91 } 92 } 93 94 private void onAccessoryAttached(UsbAccessory accessory) { 95 Log.i(TAG, "Starting AOAP discovery protocol, accessory attached: " + accessory); 96 // Check whether we have permission to access the accessory. 97 if (!mUsbManager.hasPermission(accessory)) { 98 Log.i(TAG, "Prompting the user for access to the accessory."); 99 Intent intent = new Intent(ACTION_USB_ACCESSORY_PERMISSION); 100 intent.setPackage(getPackageName()); 101 PendingIntent pendingIntent = PendingIntent.getBroadcast( 102 this, 0, intent, PendingIntent.FLAG_ONE_SHOT); 103 mUsbManager.requestPermission(accessory, pendingIntent); 104 return; 105 } 106 mFd = mUsbManager.openAccessory(accessory); 107 if (mFd == null) { 108 Log.e(TAG, "UsbManager.openAccessory returned null"); 109 finish(); 110 return; 111 } 112 mAccessory = accessory; 113 mReaderThread = new ReaderThread(mFd); 114 mReaderThread.start(); 115 } 116 117 private void onAccessoryDetached(UsbAccessory accessory) { 118 Log.i(TAG, "Accessory detached: " + accessory); 119 finish(); 120 } 121 122 private class ReaderThread extends Thread { 123 private boolean mShouldQuit = false; 124 private final FileInputStream mInputStream; 125 private final FileOutputStream mOutputStream; 126 private final byte[] mBuffer = new byte[16384]; 127 128 private ReaderThread(ParcelFileDescriptor fd) { 129 super("AOAP"); 130 mInputStream = new FileInputStream(fd.getFileDescriptor()); 131 mOutputStream = new FileOutputStream(fd.getFileDescriptor()); 132 } 133 134 private synchronized void requestToQuit() { 135 mShouldQuit = true; 136 } 137 138 private synchronized boolean shouldQuit() { 139 return mShouldQuit; 140 } 141 142 @Override 143 public void run() { 144 while (!shouldQuit()) { 145 try { 146 int read = mInputStream.read(mBuffer); 147 } catch (IOException e) { 148 Log.i(TAG, "ReaderThread IOException", e); 149 // AOAP App should release FD when IOException happens. 150 // If FD is kept, device will not behave nicely on reset and multiple reset 151 // can be required. 152 finish(); 153 return; 154 } 155 } 156 } 157 } 158 159 private class AccessoryReceiver extends BroadcastReceiver { 160 @Override 161 public void onReceive(Context context, Intent intent) { 162 UsbAccessory accessory = intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY); 163 if (accessory != null) { 164 String action = intent.getAction(); 165 if (action.equals(UsbManager.ACTION_USB_ACCESSORY_ATTACHED)) { 166 onAccessoryAttached(accessory); 167 } else if (action.equals(UsbManager.ACTION_USB_ACCESSORY_DETACHED)) { 168 if (mAccessory != null && mAccessory.equals(accessory)) { 169 onAccessoryDetached(accessory); 170 } 171 } else if (action.equals(ACTION_USB_ACCESSORY_PERMISSION)) { 172 if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) { 173 Log.i(TAG, "Accessory permission granted: " + accessory); 174 onAccessoryAttached(accessory); 175 } else { 176 Log.e(TAG, "Accessory permission denied: " + accessory); 177 finish(); 178 } 179 } 180 } 181 } 182 } 183 } 184
