cmds/svc/src/com/android/commands/svc/NfcCommand.java

   1 /*
   2  * Copyright (C) 2015 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
  17 package com.android.commands.svc;
  18
  19 import android.content.Context;
  20 import android.content.pm.IPackageManager;
  21 import android.content.pm.PackageManager;
  22 import android.nfc.INfcAdapter;
  23 import android.os.RemoteException;
  24 import android.os.ServiceManager;
  25
  26 public class NfcCommand extends Svc.Command {
  27
  28     public NfcCommand() {
  29         super("nfc");
  30     }
  31
  32     @Override
  33     public String shortHelp() {
  34         return "Control NFC functions";
  35     }
  36
  37     @Override
  38     public String longHelp() {
  39         return shortHelp() + "\n"
  40                 + "\n"
  41                 + "usage: svc nfc [enable|disable]\n"
  42                 + "         Turn NFC on or off.\n\n";
  43     }
  44
  45     @Override
  46     public void run(String[] args) {
  47         boolean validCommand = false;
  48         if (args.length >= 2) {
  49             boolean flag = false;
  50             if ("enable".equals(args[1])) {
  51                 flag = true;
  52                 validCommand = true;
  53             } else if ("disable".equals(args[1])) {
  54                 flag = false;
  55                 validCommand = true;
  56             }
  57             if (validCommand) {
  58                 IPackageManager pm = IPackageManager.Stub.asInterface(
  59                         ServiceManager.getService("package"));
  60                 try {
  61                     if (pm.hasSystemFeature(PackageManager.FEATURE_NFC, 0)) {
  62                         INfcAdapter nfc = INfcAdapter.Stub
  63                                 .asInterface(ServiceManager.getService(Context.NFC_SERVICE));
  64                         try {
  65                             if (flag) {
  66                                 nfc.enable();
  67                             } else
  68                                 nfc.disable(true);
  69                         } catch (RemoteException e) {
  70                             System.err.println("NFC operation failed: " + e);
  71                         }
  72                     } else {
  73                         System.err.println("NFC feature not supported.");
  74                     }
  75                 } catch (RemoteException e) {
  76                     System.err.println("RemoteException while calling PackageManager, is the "
  77                             + "system running?");
  78                 }
  79                 return;
  80             }
  81         }
  82         System.err.println(longHelp());
  83     }
  84
  85 }