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      1 /*
      2  * Copyright (C) 2014 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.nfc.beam;
     18 
     19 import com.android.nfc.R;
     20 
     21 import android.app.Service;
     22 import android.bluetooth.BluetoothAdapter;
     23 import android.content.BroadcastReceiver;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import android.content.IntentFilter;
     27 import android.media.AudioManager;
     28 import android.media.SoundPool;
     29 import android.os.Handler;
     30 import android.os.IBinder;
     31 import android.os.Message;
     32 import android.os.Messenger;
     33 import android.os.RemoteException;
     34 import android.util.Log;
     35 
     36 public class BeamSendService extends Service implements BeamTransferManager.Callback {
     37     private static String TAG = "BeamSendService";
     38     private static boolean DBG = true;
     39 
     40     public static String EXTRA_BEAM_TRANSFER_RECORD
     41             = "com.android.nfc.beam.EXTRA_BEAM_TRANSFER_RECORD";
     42     public static final String EXTRA_BEAM_COMPLETE_CALLBACK
     43             = "com.android.nfc.beam.TRANSFER_COMPLETE_CALLBACK";
     44 
     45     private BeamTransferManager mTransferManager;
     46     private BeamStatusReceiver mBeamStatusReceiver;
     47     private boolean mBluetoothEnabledByNfc;
     48     private Messenger mCompleteCallback;
     49     private int mStartId;
     50     SoundPool mSoundPool;
     51     int mSuccessSound;
     52 
     53     private final BluetoothAdapter mBluetoothAdapter;
     54     private final BroadcastReceiver mBluetoothStateReceiver = new BroadcastReceiver() {
     55         @Override
     56         public void onReceive(Context context, Intent intent) {
     57             String action = intent.getAction();
     58             if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
     59                 handleBluetoothStateChanged(intent);
     60             }
     61         }
     62     };
     63 
     64     public BeamSendService() {
     65         mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
     66     }
     67 
     68     @Override
     69     public void onCreate() {
     70         super.onCreate();
     71 
     72         mSoundPool = new SoundPool(1, AudioManager.STREAM_NOTIFICATION, 0);
     73         mSuccessSound = mSoundPool.load(this, R.raw.end, 1);
     74 
     75         // register BT state receiver
     76         IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
     77         registerReceiver(mBluetoothStateReceiver, filter);
     78     }
     79 
     80     @Override
     81     public void onDestroy() {
     82         super.onDestroy();
     83         if (mSoundPool != null) {
     84             mSoundPool.release();
     85         }
     86 
     87         if (mBeamStatusReceiver != null) {
     88             unregisterReceiver(mBeamStatusReceiver);
     89         }
     90         unregisterReceiver(mBluetoothStateReceiver);
     91     }
     92 
     93     @Override
     94     public int onStartCommand(Intent intent, int flags, int startId) {
     95         mStartId = startId;
     96 
     97         BeamTransferRecord transferRecord;
     98         if (intent == null ||
     99                 (transferRecord = intent.getParcelableExtra(EXTRA_BEAM_TRANSFER_RECORD)) == null) {
    100             if (DBG) Log.e(TAG, "No transfer record provided. Stopping.");
    101             stopSelf(startId);
    102             return START_NOT_STICKY;
    103         }
    104 
    105         mCompleteCallback = intent.getParcelableExtra(EXTRA_BEAM_COMPLETE_CALLBACK);
    106 
    107         if (doTransfer(transferRecord)) {
    108             if (DBG) Log.i(TAG, "Starting outgoing Beam transfer");
    109             return START_STICKY;
    110         } else {
    111             invokeCompleteCallback();
    112             stopSelf(startId);
    113             return START_NOT_STICKY;
    114         }
    115     }
    116 
    117     boolean doTransfer(BeamTransferRecord transferRecord) {
    118         if (createBeamTransferManager(transferRecord)) {
    119             // register Beam status receiver
    120             mBeamStatusReceiver = new BeamStatusReceiver(this, mTransferManager);
    121             registerReceiver(mBeamStatusReceiver, mBeamStatusReceiver.getIntentFilter(),
    122                     BeamStatusReceiver.BEAM_STATUS_PERMISSION, new Handler());
    123 
    124             if (transferRecord.dataLinkType == BeamTransferRecord.DATA_LINK_TYPE_BLUETOOTH) {
    125                 if (mBluetoothAdapter.isEnabled()) {
    126                     // Start the transfer
    127                     mTransferManager.start();
    128                 } else {
    129                     if (!mBluetoothAdapter.enableNoAutoConnect()) {
    130                         Log.e(TAG, "Error enabling Bluetooth.");
    131                         mTransferManager = null;
    132                         return false;
    133                     }
    134                     mBluetoothEnabledByNfc = true;
    135                     if (DBG) Log.d(TAG, "Queueing out transfer "
    136                             + Integer.toString(transferRecord.id));
    137                 }
    138             }
    139             return true;
    140         }
    141 
    142         return false;
    143     }
    144 
    145     boolean createBeamTransferManager(BeamTransferRecord transferRecord) {
    146         if (mTransferManager != null) {
    147             return false;
    148         }
    149 
    150         if (transferRecord.dataLinkType != BeamTransferRecord.DATA_LINK_TYPE_BLUETOOTH) {
    151             // only support BT
    152             return false;
    153         }
    154 
    155         mTransferManager = new BeamTransferManager(this, this, transferRecord, false);
    156         mTransferManager.updateNotification();
    157         return true;
    158     }
    159 
    160     private void handleBluetoothStateChanged(Intent intent) {
    161         int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,
    162                 BluetoothAdapter.ERROR);
    163         if (state == BluetoothAdapter.STATE_ON) {
    164             if (mTransferManager != null &&
    165                     mTransferManager.mDataLinkType == BeamTransferRecord.DATA_LINK_TYPE_BLUETOOTH) {
    166                 mTransferManager.start();
    167             }
    168         } else if (state == BluetoothAdapter.STATE_OFF) {
    169             mBluetoothEnabledByNfc = false;
    170         }
    171     }
    172 
    173     private void invokeCompleteCallback() {
    174         if (mCompleteCallback != null) {
    175             try {
    176                 mCompleteCallback.send(Message.obtain(null, BeamManager.MSG_BEAM_COMPLETE));
    177             } catch (RemoteException e) {
    178                 Log.e(TAG, "failed to invoke Beam complete callback", e);
    179             }
    180         }
    181     }
    182 
    183     @Override
    184     public void onTransferComplete(BeamTransferManager transfer, boolean success) {
    185         // Play success sound
    186         if (success) {
    187             mSoundPool.play(mSuccessSound, 1.0f, 1.0f, 0, 0, 1.0f);
    188         } else {
    189             if (DBG) Log.d(TAG, "Transfer failed, final state: " +
    190                     Integer.toString(transfer.mState));
    191         }
    192 
    193         if (mBluetoothEnabledByNfc) {
    194             mBluetoothEnabledByNfc = false;
    195             mBluetoothAdapter.disable();
    196         }
    197 
    198         invokeCompleteCallback();
    199         stopSelf(mStartId);
    200     }
    201 
    202     @Override
    203     public IBinder onBind(Intent intent) {
    204         return null;
    205     }
    206 }
    207