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      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 
     42     public DtaServiceConnector(Context mContext) {
     43         this.mContext = mContext;
     44     }
     45 
     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 
     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 
     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 
     96     public static void setMessageService(String service) {
     97         sMessageService = service;
     98     }
     99 
    100 }
    101