Android Open Source - CSCI567---Workspace Default Nfc Reader Activity

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License

The source code is released under:

MIT License

Java Source Code

/***************************************************************************
 * //from   w  w w .ja  v  a  2s  . c om
 * This file is part of the 'NDEF Tools for Android' project at
 * http://code.google.com/p/ndef-tools-for-android/
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 ****************************************************************************/

package org.ndeftools.boilerplate;

import org.ndeftools.Message;
import org.ndeftools.MimeRecord;
import org.ndeftools.Record;
import org.ndeftools.externaltype.ExternalTypeRecord;
import org.ndeftools.util.activity.NfcReaderActivity;
import org.ndeftools.wellknown.TextRecord;

import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

/**
 * 
 * Activity demonstrating the default implementation of the abstract reader activity. 
 * 
 * The activity lists the records of any detected NDEF message and displays some toast messages for various events.
 * 
 * @author Thomas Rorvik Skjolberg
 *
 */

public class DefaultNfcReaderActivity extends NfcReaderActivity {

  private static final String TAG = DefaultNfcReaderActivity.class.getName();
  
  protected Message message;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.reader);
    
    // lets start detecting NDEF message using foreground mode
    setDetecting(true);
  }
  
  /**
   * An NDEF message was read and parsed. This method prints its contents to log and then shows its contents in the GUI.
   * 
   * @param message the message
   */
  
  @Override
  public void readNdefMessage(Message message) {
    if(message.size() > 1) {
          toast(getString(R.string.readMultipleRecordNDEFMessage));
    } else {
          toast(getString(R.string.readSingleRecordNDEFMessage));
    }    
    
    this.message = message;
    
    // process message
    
    // show in log
    if(message != null) {
      // iterate through all records in message
      Log.d(TAG, "Found " + message.size() + " NDEF records");

      for(int k = 0; k < message.size(); k++) {
        Record record = message.get(k);
        
        Log.d(TAG, "Record " + k + " type " + record.getClass().getSimpleName());
        
        // your own code here, for example:
        if(record instanceof MimeRecord) {
          // ..
        } else if(record instanceof ExternalTypeRecord) {
          // ..
        } else if(record instanceof TextRecord) {
          // ..
        } else { // more else
          // ..
        }
      }
    }
    
    // show in gui
    showList();
  }
  

  /**
   * An empty NDEF message was read.
   * 
   */
  
  @Override
  protected void readEmptyNdefMessage() {
     toast(getString(R.string.readEmptyMessage));
  }

  /**
   * 
   * Something was read via NFC, but it was not an NDEF message. 
   * 
   * Handling this situation is out of scope of this project.
   * 
   */
  
  @Override
  protected void readNonNdefMessage() {
    toast(getString(R.string.readNonNDEFMessage));
  }

   /**
     * 
     * NFC feature was found and is currently enabled
     * 
     */
  
  @Override
  protected void onNfcStateEnabled() {
    toast(getString(R.string.nfcAvailableEnabled));
  }

    /**
     * 
     * NFC feature was found but is currently disabled
     * 
     */
  
  @Override
  protected void onNfcStateDisabled() {
    toast(getString(R.string.nfcAvailableDisabled));
  }

  /**
     * 
     * NFC setting changed since last check. For example, the user enabled NFC in the wireless settings.
     * 
     */
  
  @Override
  protected void onNfcStateChange(boolean enabled) {
    if(enabled) {
      toast(getString(R.string.nfcAvailableEnabled));
    } else {
      toast(getString(R.string.nfcAvailableDisabled));
    }
  }

  /**
   * 
   * This device does not have NFC hardware
   * 
   */
  
  @Override
  protected void onNfcFeatureNotFound() {
    toast(getString(R.string.noNfcMessage));
  }

  /**
   * 
   * Show NDEF records in the list
   * 
   */
  
  private void showList() {
    if(message != null && !message.isEmpty()) {
      
      // display the message
      // show in gui
      ArrayAdapter<? extends Object> adapter = new NdefRecordAdapter(this, message);
      ListView listView = (ListView) findViewById(R.id.recordListView);
      listView.setAdapter(adapter);
    } else {
      clearList();
    }
  }
  
  /**
   * 
   * Clear NDEF records from list
   * 
   */
  
  private void clearList() {
    ListView listView = (ListView) findViewById(R.id.recordListView);
    listView.setAdapter(null);
  }

  public void toast(String message) {
    Toast toast = Toast.makeText(this, message, Toast.LENGTH_LONG);
    toast.setGravity(Gravity.CENTER_HORIZONTAL|Gravity.CENTER_VERTICAL, 0, 0);
    toast.show();
  }

}

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