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      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 
     17 package com.googlecode.android_scripting.facade;
     18 
     19 import com.googlecode.android_scripting.jsonrpc.RpcReceiver;
     20 import com.googlecode.android_scripting.rpc.Rpc;
     21 
     22 import android.app.Service;
     23 import android.content.BroadcastReceiver;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import android.content.IntentFilter;
     27 import android.nfc.NfcAdapter;
     28 import android.nfc.NfcManager;
     29 
     30 /**
     31  * Access NFC functions.
     32  */
     33 public class NfcManagerFacade extends RpcReceiver {
     34 
     35     private final Service mService;
     36     private final NfcManager mNfcManager;
     37     private final NfcAdapter mNfc;
     38     private final EventFacade mEventFacade;
     39     private final IntentFilter mStateChangeFilter;
     40     private boolean mTrackingStateChange;
     41 
     42     public NfcManagerFacade(FacadeManager manager) {
     43         super(manager);
     44         mService = manager.getService();
     45         mNfcManager = (NfcManager) mService.getSystemService(Context.NFC_SERVICE);
     46         mNfc = mNfcManager.getDefaultAdapter();
     47         mEventFacade = manager.getReceiver(EventFacade.class);
     48         mStateChangeFilter = new IntentFilter(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED);
     49     }
     50 
     51     private final BroadcastReceiver mNfcStateReceiver = new BroadcastReceiver() {
     52         @Override
     53         public void onReceive(Context context, Intent intent) {
     54             String action = intent.getAction();
     55             if (NfcAdapter.ACTION_ADAPTER_STATE_CHANGED.equals(action)) {
     56                 int nfcState = intent.getIntExtra(NfcAdapter.EXTRA_ADAPTER_STATE,
     57                         NfcAdapter.STATE_OFF);
     58                 if (nfcState == NfcAdapter.STATE_ON) {
     59                     mEventFacade.postEvent("NfcStateOn", null);
     60                 } else if (nfcState == NfcAdapter.STATE_OFF) {
     61                     mEventFacade.postEvent("NfcStateOff", null);
     62                 }
     63             }
     64         }
     65     };
     66 
     67     @Rpc(description = "Check if NFC hardware is enabled.")
     68     public Boolean nfcIsEnabled() {
     69         return mNfc.isEnabled();
     70     }
     71 
     72     @Rpc(description = "Asynchronous call to enable NFC hardware.")
     73     public Boolean nfcEnable() {
     74         return mNfc.enable();
     75     }
     76 
     77     @Rpc(description = "Asynchronous call to disable NFC hardware.")
     78     public Boolean nfcDisable() {
     79         return mNfc.disable();
     80     }
     81 
     82     @Rpc(description = "Start tracking NFC hardware state changes.")
     83     public void nfcStartTrackingStateChange() {
     84         mService.registerReceiver(mNfcStateReceiver, mStateChangeFilter);
     85         mTrackingStateChange = true;
     86     }
     87 
     88     @Rpc(description = "Stop tracking NFC hardware state changes.")
     89     public void nfcStopTrackingStateChange() {
     90         mService.unregisterReceiver(mNfcStateReceiver);
     91         mTrackingStateChange = false;
     92     }
     93 
     94     @Override
     95     public void shutdown() {
     96         if (mTrackingStateChange == true) {
     97             nfcStopTrackingStateChange();
     98         }
     99     }
    100 
    101 }
    102