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; 18 19 import java.util.ArrayList; 20 21 import android.app.Activity; 22 import android.app.AlertDialog; 23 import android.content.BroadcastReceiver; 24 import android.content.Context; 25 import android.content.DialogInterface; 26 import android.content.ClipData; 27 import android.content.Intent; 28 import android.content.IntentFilter; 29 import android.net.Uri; 30 import android.nfc.BeamShareData; 31 import android.nfc.NdefMessage; 32 import android.nfc.NdefRecord; 33 import android.nfc.NfcAdapter; 34 import android.os.Bundle; 35 import android.os.UserHandle; 36 import android.util.Log; 37 import android.webkit.URLUtil; 38 39 import com.android.internal.R; 40 41 /** 42 * This class is registered by NfcService to handle 43 * ACTION_SHARE intents. It tries to parse data contained 44 * in ACTION_SHARE intents in either a content/file Uri, 45 * which can be sent using NFC handover, or alternatively 46 * it tries to parse texts and URLs to store them in a simple 47 * Text or Uri NdefRecord. The data is then passed on into 48 * NfcService to transmit on NFC tap. 49 * 50 */ 51 public class BeamShareActivity extends Activity { 52 static final String TAG ="BeamShareActivity"; 53 static final boolean DBG = false; 54 55 ArrayList<Uri> mUris; 56 NdefMessage mNdefMessage; 57 NfcAdapter mNfcAdapter; 58 Intent mLaunchIntent; 59 60 @Override 61 protected void onCreate(Bundle savedInstanceState) { 62 super.onCreate(savedInstanceState); 63 mUris = new ArrayList<Uri>(); 64 mNdefMessage = null; 65 mNfcAdapter = NfcAdapter.getDefaultAdapter(this); 66 mLaunchIntent = getIntent(); 67 if (mNfcAdapter == null) { 68 Log.e(TAG, "NFC adapter not present."); 69 finish(); 70 } else { 71 if (!mNfcAdapter.isEnabled()) { 72 showNfcDialogAndExit(com.android.nfc.R.string.beam_requires_nfc_enabled); 73 } else { 74 parseShareIntentAndFinish(mLaunchIntent); 75 } 76 } 77 } 78 79 80 private void showNfcDialogAndExit(int msgId) { 81 IntentFilter filter = new IntentFilter(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED); 82 registerReceiverAsUser(mReceiver, UserHandle.ALL, filter, null, null); 83 84 AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this, 85 AlertDialog.THEME_DEVICE_DEFAULT_LIGHT); 86 dialogBuilder.setMessage(msgId); 87 dialogBuilder.setOnCancelListener(new DialogInterface.OnCancelListener() { 88 @Override 89 public void onCancel(DialogInterface dialogInterface) { 90 finish(); 91 } 92 }); 93 dialogBuilder.setPositiveButton(R.string.yes, 94 new DialogInterface.OnClickListener() { 95 @Override 96 public void onClick(DialogInterface dialog, int id) { 97 if (!mNfcAdapter.isEnabled()) { 98 mNfcAdapter.enable(); 99 // Wait for enable broadcast 100 } else { 101 parseShareIntentAndFinish(mLaunchIntent); 102 } 103 } 104 }); 105 dialogBuilder.setNegativeButton(R.string.no, 106 new DialogInterface.OnClickListener() { 107 @Override 108 public void onClick(DialogInterface dialogInterface, int i) { 109 finish(); 110 } 111 }); 112 dialogBuilder.show(); 113 } 114 115 void tryUri(Uri uri) { 116 if (uri.getScheme().equalsIgnoreCase("content") || 117 uri.getScheme().equalsIgnoreCase("file")) { 118 // Typically larger data, this can be shared using NFC handover 119 mUris.add(uri); 120 } else { 121 // Just put this Uri in an NDEF message 122 mNdefMessage = new NdefMessage(NdefRecord.createUri(uri)); 123 } 124 } 125 126 void tryText(String text) { 127 if (URLUtil.isValidUrl(text)) { 128 Uri parsedUri = Uri.parse(text); 129 tryUri(parsedUri); 130 } else { 131 mNdefMessage = new NdefMessage(NdefRecord.createTextRecord(null, text)); 132 } 133 } 134 135 public void parseShareIntentAndFinish(Intent intent) { 136 if (intent == null || (!intent.getAction().equalsIgnoreCase(Intent.ACTION_SEND) && 137 !intent.getAction().equalsIgnoreCase(Intent.ACTION_SEND_MULTIPLE))) return; 138 139 // First, see if the intent contains clip-data, and if so get data from there 140 ClipData clipData = intent.getClipData(); 141 if (clipData != null && clipData.getItemCount() > 0) { 142 for (int i = 0; i < clipData.getItemCount(); i++) { 143 ClipData.Item item = clipData.getItemAt(i); 144 // First try to get an Uri 145 Uri uri = item.getUri(); 146 String plainText = item.coerceToText(this).toString(); 147 if (uri != null) { 148 if (DBG) Log.d(TAG, "Found uri in ClipData."); 149 tryUri(uri); 150 } else if (plainText != null) { 151 if (DBG) Log.d(TAG, "Found text in ClipData."); 152 tryText(plainText); 153 } else { 154 if (DBG) Log.d(TAG, "Did not find any shareable data in ClipData."); 155 } 156 } 157 } else { 158 if (intent.getAction().equalsIgnoreCase(Intent.ACTION_SEND)) { 159 final Uri uri = intent.getParcelableExtra(Intent.EXTRA_STREAM); 160 final CharSequence text = intent.getCharSequenceExtra(Intent.EXTRA_TEXT); 161 if (uri != null) { 162 if (DBG) Log.d(TAG, "Found uri in ACTION_SEND intent."); 163 tryUri(uri); 164 } else if (text != null) { 165 if (DBG) Log.d(TAG, "Found EXTRA_TEXT in ACTION_SEND intent."); 166 tryText(text.toString()); 167 } else { 168 if (DBG) Log.d(TAG, "Did not find any shareable data in ACTION_SEND intent."); 169 } 170 } else { 171 final ArrayList<Uri> uris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM); 172 final ArrayList<CharSequence> texts = intent.getCharSequenceArrayListExtra( 173 Intent.EXTRA_TEXT); 174 175 if (uris != null && uris.size() > 0) { 176 for (Uri uri : uris) { 177 if (DBG) Log.d(TAG, "Found uri in ACTION_SEND_MULTIPLE intent."); 178 tryUri(uri); 179 } 180 } else if (texts != null && texts.size() > 0) { 181 // Try EXTRA_TEXT, but just for the first record 182 if (DBG) Log.d(TAG, "Found text in ACTION_SEND_MULTIPLE intent."); 183 tryText(texts.get(0).toString()); 184 } else { 185 if (DBG) Log.d(TAG, "Did not find any shareable data in " + 186 "ACTION_SEND_MULTIPLE intent."); 187 } 188 } 189 } 190 191 BeamShareData shareData = null; 192 if (mUris.size() > 0) { 193 // Uris have our first preference for sharing 194 Uri[] uriArray = new Uri[mUris.size()]; 195 int numValidUris = 0; 196 for (Uri uri : mUris) { 197 try { 198 grantUriPermission("com.android.nfc", uri, Intent.FLAG_GRANT_READ_URI_PERMISSION); 199 uriArray[numValidUris++] = uri; 200 if (DBG) Log.d(TAG, "Found uri: " + uri); 201 } catch (SecurityException e) { 202 Log.e(TAG, "Security exception granting uri permission to NFC process."); 203 numValidUris = 0; 204 break; 205 } 206 } 207 if (numValidUris > 0) { 208 shareData = new BeamShareData(null, uriArray, UserHandle.CURRENT, 0); 209 } else { 210 // No uris left 211 shareData = new BeamShareData(null, null, UserHandle.CURRENT, 0); 212 } 213 } else if (mNdefMessage != null) { 214 shareData = new BeamShareData(mNdefMessage, null, UserHandle.CURRENT, 0); 215 if (DBG) Log.d(TAG, "Created NDEF message:" + mNdefMessage.toString()); 216 } else { 217 if (DBG) Log.d(TAG, "Could not find any data to parse."); 218 // Activity may have set something to share over NFC, so pass on anyway 219 shareData = new BeamShareData(null, null, UserHandle.CURRENT, 0); 220 } 221 mNfcAdapter.invokeBeam(shareData); 222 finish(); 223 } 224 225 final BroadcastReceiver mReceiver = new BroadcastReceiver() { 226 @Override 227 public void onReceive(Context context, Intent intent) { 228 String action = intent.getAction(); 229 if (NfcAdapter.ACTION_ADAPTER_STATE_CHANGED.equals(intent.getAction())) { 230 int state = intent.getIntExtra(NfcAdapter.EXTRA_ADAPTER_STATE, 231 NfcAdapter.STATE_OFF); 232 if (state == NfcAdapter.STATE_ON) { 233 parseShareIntentAndFinish(mLaunchIntent); 234 } 235 } 236 } 237 }; 238 } 239
