robinwilliamsxu / headfirstandroid Goto Github PK

What steps will reproduce the problem?
1.Choose an user without photo and the program crash! 
2.
3.

What is the expected output? What do you see instead?


What version of the product are you using? On what operating system?
I'm using Eclipse and Java jdk 1.6_0_33

Please provide any additional information below.

What steps will reproduce the problem?

i am providing sourcecodes in NasaDailyImage.java according to the book(head 
first android)
there were no errors in code but i am not getting the output on the emulator. 
it is showing blank.
 source code which i am providing according to the book is

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import android.os.Bundle;
import android.widget.ImageView;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.widget.TextView;
import com.example.nasadailyimage.R;

public class NasaDailyImage extends Activity {

     @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_nasa_daily_image);
            IotdHandler handler = new IotdHandler ();
            handler.processFeed();
            resetDisplay (handler.getTitle(), handler.getDate(), handler.getImage(), handler.getDescription());
        }

        public class IotdHandler extends DefaultHandler {
            private String url = "http://www.nasa.gov/rss/image_of_the_day.rss";
            private boolean inUrl = false;
            private boolean inTitle = false;
            private boolean inDescription = false;
            private boolean inItem = false;
            private boolean inDate = false;
            private Bitmap image = null;
            private String title = null;
            private StringBuffer description = new StringBuffer();
            private String date = null;


            public void processFeed() {
                try {
                SAXParserFactory factory =
                SAXParserFactory.newInstance();
                SAXParser parser = factory.newSAXParser();
                XMLReader reader = parser.getXMLReader();
                reader.setContentHandler(this);
                InputStream inputStream = new URL(url).openStream();
                reader.parse(new InputSource(inputStream));
                } catch (Exception e) {  }
            }

                private Bitmap getBitmap(String url) {
                    try {
                    HttpURLConnection connection = (HttpURLConnection)new URL(url).openConnection();
                    connection.setDoInput(true);
                    connection.connect();
                    InputStream input = connection.getInputStream();
                    Bitmap bilde = BitmapFactory.decodeStream(input);
                    input.close();
                    return bilde;
                    } catch (IOException ioe) { return null; }
                    }

                public void startElement(String url, String localName, String qName, Attributes attributes) throws SAXException {
                        if (localName.endsWith(".jpg")) { inUrl = true; }
                        else { inUrl = false; }

                        if (localName.startsWith("item")) { inItem = true; }
                        else if (inItem) {

                            if (localName.equals("title")) { inTitle = true; }
                            else { inTitle = false; }

                            if (localName.equals("description")) { inDescription = true; }
                            else { inDescription = false; }

                            if (localName.equals("pubDate")) { inDate = true; }
                            else { inDate = false; }
                            }
                        }


                public void characters(char ch[], int start, int length) { String chars = new String(ch).substring(start, start + length);
                    if (inUrl && url == null) { image = getBitmap(chars); }
                    if (inTitle && title == null) { title = chars; }
                    if (inDescription) { description.append(chars); }
                    if (inDate && date == null) { date = chars; }


             }

            public Bitmap getImage() { return image; }
            public String getTitle() { return title; }
            public StringBuffer getDescription() { return description; }
            public String getDate() { return date; }


    }

        private void resetDisplay (String title, String date, Bitmap image, StringBuffer description) {

            TextView titleView = (TextView) findViewById (R.id.imageTitle);
            titleView.setText(title);

            TextView dateView = (TextView) findViewById(R.id.imageDate);
            dateView.setText(date);

            ImageView imageView = (ImageView) findViewById (R.id.imageView1);
            imageView.setImageBitmap(image);

            TextView descriptionView = (TextView) findViewById (R.id.imageDescription);
            descriptionView.setText(description);
        }


    @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_nasa_daily_image, menu);
        return true;
    }

}

What is the expected output? What do you see instead?

EMULATOR SCREEN IS BLANK

What version of the product are you using? On what operating system?

i am using eclipse version 21.0.1 on windows7 

Please provide any additional information below.