Android Open Source - sodf Expired Activity

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License

The source code is released under:

Copyright (c) 2013 Lorenz Lehmann Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Sof...

Java Source Code

package lal.apps.smartfoodenvironment.activities;
//  w w  w . j  av a2s. co m
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import lal.apps.smartfoodenvironment.R;
import lal.apps.smartfoodenvironment.model.ProductVocabulary;
import lal.sodf.framework.SodfCallback;
import lal.sodf.framework.SodfFramework;
import lal.sodf.framework.SodfWrapper;
import lal.sodf.framework.exceptions.CompressionAlgorithmNotFoundException;
import lal.sodf.framework.ontology.KeyValueNode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class ExpiredActivity extends Activity implements SodfCallback{
  
  private Handler handler;
  private PendingIntent pendingIntent;
  private TextView opened;
  private TextView suggestion;
  private ExpiredActivity self;
  private Tag tag;
  private String today;
  private SimpleDateFormat sdf;

  @SuppressLint("SimpleDateFormat")
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_expired);
    self = this;
    handler = new Handler();
    pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
    //set the view references
    opened = (TextView) findViewById(R.id.expired_productInfo);
    suggestion = (TextView) findViewById(R.id.expired_manufactuererSuggestion);
    //get the date of today formatted properly
    Calendar c = Calendar.getInstance();
    sdf = new SimpleDateFormat("dd-MMM-yyyy");
    today = sdf.format(c.getTime());
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_start, menu);
    return true;
  }
  
  @Override
  public void readComplete(final SodfWrapper data) {
    handler.post(new Runnable(){
      @Override
      public void run() {
        if (data.exception != null || data.data == null){
          Log.e("SFE", "Error on read: "+data.exception);
          Toast toast = Toast.makeText(self, "The tag, which you tapped did not belong to a valid product", Toast.LENGTH_LONG);
          toast.show();
        }
        else {//parse the data
          //check if this is the first time the item is opened
          KeyValueNode date = data.data.getPropertiesSubtree().getKeyValueNodeChild(ProductVocabulary.PRODUCT_OPENED);
          KeyValueNode suggestedDays = data.data.getPropertiesSubtree().getKeyValueNodeChild(ProductVocabulary.PRODUCT_GOOD_AFTER_OPENING);
          if (date == null) {//the product was not opened before so the date has to be added
            //add the formatted date to the SODF tree
            data.data.getPropertiesSubtree().addChild(new KeyValueNode(ProductVocabulary.PRODUCT_OPENED, today));
            //write everything on the tag
            try {
              SodfFramework.writeData(tag, data, self);
            } catch (CompressionAlgorithmNotFoundException e) {
              Log.e("SFE", "Error: "+e);
            }
          }
          else {//write date and remaining days to the screen
            try {
              String openedOn = date.getFirstValue();
              Log.i("SFE","Product was opened on"+openedOn);
              //compare the opening date to the current date
              Date opening = sdf.parse(openedOn);
              Date now = sdf.parse(today);
              int diffInDays = (int) ( (now.getTime() - opening.getTime()) / (1000 * 60 * 60 * 24) );
              //calculate the exact expiration date
              long expiration = opening.getTime() + (1000 * 60 * 60 * 24 * Integer.valueOf(suggestedDays.getFirstValue()));
              Date expirationDate = new Date(expiration);
              opened.setText(getString(R.string.expired_productChecked, openedOn, diffInDays, sdf.format(expirationDate)));
              opened.setVisibility(View.VISIBLE);
              
            } catch (ParseException e) {
              Log.e("SFE","Error when parsing date: "+e);
            }                
          }
          //in any case show the user the suggested days
          if (suggestedDays != null){
            suggestion.setVisibility(View.VISIBLE);
            suggestion.setText(getString(R.string.expired_manufacturerSuggestion, suggestedDays.getFirstValue()));        
          }
          else Log.e("SFE", "Suggested days till expiration not found.");
        }
      }      
    });
  }

  @Override
  public void writeComplete(final int resultCode) {
    handler.post(new Runnable(){
      @Override
      public void run() {
        if (resultCode == SodfCallback.WRITE_SUCCESSFUL){
          opened.setVisibility(View.VISIBLE);
          opened.setText(R.string.expired_productOpened);          
        }
        else {
          Log.e("SFE","Error on write: "+resultCode);
          Toast toast = Toast.makeText(self, "Error when writing data on the tag. Please try again and tap the tag a bit longer", Toast.LENGTH_LONG);
          toast.show();
        }                
      }      
    });
  }
  
  /* (non-Javadoc)
   * @see android.app.Activity#onPause()
   */
  @Override
  protected void onPause() {
    //has to be disabled because the app is not in foreground anymore
    NfcAdapter.getDefaultAdapter(this).disableForegroundDispatch(this);
    super.onPause();
  }
  
  
  /* (non-Javadoc)
   * @see android.app.Activity#onResume()
   */
  @Override
  protected void onResume() {
    super.onResume();
    //register to receive NFC tags
    NfcAdapter.getDefaultAdapter(this).enableForegroundDispatch(this, pendingIntent, null, null);
  }

  /* (non-Javadoc)
   * @see android.app.Activity#onNewIntent(android.content.Intent)
   */
  @Override
  protected void onNewIntent(Intent intent) {
    tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
    //ensure that a tag was tapped
    if (tag != null){
      //try to read the data from the tag
      SodfFramework.readData(tag, this);
    }
  }
  

}

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