1 /* 2 * Copyright (C) 2017 NXP Semiconductors 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.nfc; 18 19 import java.util.List; 20 21 import android.content.ComponentName; 22 import android.content.Context; 23 import android.content.Intent; 24 import android.content.ServiceConnection; 25 import android.content.pm.PackageManager; 26 import android.content.pm.ResolveInfo; 27 import android.os.Bundle; 28 import android.os.IBinder; 29 import android.os.Message; 30 import android.os.Messenger; 31 import android.os.RemoteException; 32 33 public class DtaServiceConnector { 34 35 36 private static String sMessageService; 37 Context mContext; 38 Messenger dtaMessenger = null; 39 boolean isBound; 40 41 DtaServiceConnector(Context mContext)42 public DtaServiceConnector(Context mContext) { 43 this.mContext = mContext; 44 } 45 bindService()46 public void bindService() { 47 if (!isBound) { 48 Intent intent = new Intent(sMessageService); 49 mContext.bindService(createExplicitFromImplicitIntent(mContext,intent), 50 myConnection,Context.BIND_AUTO_CREATE); 51 } 52 } 53 54 private ServiceConnection myConnection = new ServiceConnection() { 55 public void onServiceConnected(ComponentName className, IBinder service) { 56 dtaMessenger = new Messenger(service); 57 isBound = true; 58 } 59 60 public void onServiceDisconnected(ComponentName className) { 61 dtaMessenger = null; 62 isBound = false; 63 } 64 }; 65 sendMessage(String ndefMessage)66 public void sendMessage(String ndefMessage) { 67 if (!isBound) return; 68 Message msg = Message.obtain(); 69 Bundle bundle = new Bundle(); 70 bundle.putString("NDEF_MESSAGE", ndefMessage); 71 msg.setData(bundle); 72 try { 73 dtaMessenger.send(msg); 74 } catch (RemoteException e) { 75 e.printStackTrace(); 76 } catch (NullPointerException e) { 77 e.printStackTrace(); 78 } 79 } 80 createExplicitFromImplicitIntent(Context context, Intent implicitIntent)81 public static Intent createExplicitFromImplicitIntent(Context context, Intent implicitIntent) { 82 PackageManager pm = context.getPackageManager(); 83 List<ResolveInfo> resolveInfo = pm.queryIntentServices(implicitIntent, 0); 84 if (resolveInfo == null || resolveInfo.size() != 1) { 85 return null; 86 } 87 ResolveInfo serviceInfo = resolveInfo.get(0); 88 String packageName = serviceInfo.serviceInfo.packageName; 89 String className = serviceInfo.serviceInfo.name; 90 ComponentName component = new ComponentName(packageName, className); 91 Intent explicitIntent = new Intent(implicitIntent); 92 explicitIntent.setComponent(component); 93 return explicitIntent; 94 } 95 setMessageService(String service)96 public static void setMessageService(String service) { 97 sMessageService = service; 98 } 99 100 } 101