1 /* 2 * Copyright (C) 2012 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.bluetooth.BluetoothDevice; 22 import android.content.Context; 23 import android.content.Intent; 24 import android.net.Uri; 25 import android.os.Handler; 26 import android.os.Message; 27 import android.os.SystemClock; 28 import android.util.Log; 29 30 import java.util.ArrayList; 31 32 public class BluetoothOppHandover implements Handler.Callback { 33 static final String TAG = "BluetoothOppHandover"; 34 static final boolean DBG = true; 35 36 static final int STATE_INIT = 0; 37 static final int STATE_TURNING_ON = 1; 38 static final int STATE_WAITING = 2; // Need to wait for remote side turning on BT 39 static final int STATE_COMPLETE = 3; 40 41 static final int MSG_START_SEND = 0; 42 43 static final int REMOTE_BT_ENABLE_DELAY_MS = 5000; 44 45 static final String ACTION_HANDOVER_SEND = 46 "android.nfc.handover.intent.action.HANDOVER_SEND"; 47 48 static final String ACTION_HANDOVER_SEND_MULTIPLE = 49 "android.nfc.handover.intent.action.HANDOVER_SEND_MULTIPLE"; 50 51 final Context mContext; 52 final BluetoothDevice mDevice; 53 54 final ArrayList<Uri> mUris; 55 final boolean mRemoteActivating; 56 final Handler mHandler; 57 final Long mCreateTime; 58 59 int mState; 60 BluetoothOppHandover(Context context, BluetoothDevice device, ArrayList<Uri> uris, boolean remoteActivating)61 public BluetoothOppHandover(Context context, BluetoothDevice device, ArrayList<Uri> uris, 62 boolean remoteActivating) { 63 mContext = context; 64 mDevice = device; 65 mUris = uris; 66 mRemoteActivating = remoteActivating; 67 mCreateTime = SystemClock.elapsedRealtime(); 68 69 mHandler = new Handler(context.getMainLooper(), this); 70 mState = STATE_INIT; 71 } 72 73 /** 74 * Main entry point. This method is usually called after construction, 75 * to begin the BT sequence. Must be called on Main thread. 76 */ start()77 public void start() { 78 if (mRemoteActivating) { 79 Long timeElapsed = SystemClock.elapsedRealtime() - mCreateTime; 80 if (timeElapsed < REMOTE_BT_ENABLE_DELAY_MS) { 81 mHandler.sendEmptyMessageDelayed(MSG_START_SEND, 82 REMOTE_BT_ENABLE_DELAY_MS - timeElapsed); 83 } else { 84 // Already waited long enough for BT to come up 85 // - start send. 86 sendIntent(); 87 } 88 } else { 89 // Remote BT enabled already, start send immediately 90 sendIntent(); 91 } 92 } 93 complete()94 void complete() { 95 mState = STATE_COMPLETE; 96 } 97 sendIntent()98 void sendIntent() { 99 Intent intent = new Intent(); 100 intent.setPackage(mContext.getString(R.string.bluetooth_package)); 101 String mimeType = MimeTypeUtil.getMimeTypeForUri(mContext, mUris.get(0)); 102 intent.setType(mimeType); 103 intent.putExtra(BluetoothDevice.EXTRA_DEVICE, mDevice); 104 for (Uri uri : mUris) { 105 // TODO we need to transfer our permission grant from NFC 106 // to the Bluetooth process. This works, but we don't have 107 // a good framework API for revoking permission yet. 108 try { 109 mContext.grantUriPermission(mContext.getString(R.string.bluetooth_package), uri, 110 Intent.FLAG_GRANT_READ_URI_PERMISSION); 111 } catch (SecurityException e) { 112 Log.e(TAG, "Failed to transfer permission to Bluetooth process."); 113 } 114 } 115 if (mUris.size() == 1) { 116 intent.setAction(ACTION_HANDOVER_SEND); 117 intent.putExtra(Intent.EXTRA_STREAM, mUris.get(0)); 118 } else { 119 intent.setAction(ACTION_HANDOVER_SEND_MULTIPLE); 120 intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, mUris); 121 } 122 if (DBG) Log.d(TAG, "Handing off outging transfer to BT"); 123 intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); 124 mContext.sendBroadcast(intent); 125 126 complete(); 127 } 128 129 130 @Override handleMessage(Message msg)131 public boolean handleMessage(Message msg) { 132 if (msg.what == MSG_START_SEND) { 133 sendIntent(); 134 return true; 135 } 136 return false; 137 } 138 } 139