Android Application that makes use of RSS Feed

Aim:

To develop a Android Application that makes use of RSS Feed.

Procedure:

Creating a New project:

Open Android Studio and then click on File -> New -> New project.

Then type the Application name as “ex.no.6″ and click Next.

Then select the Minimum SDK as shown below and click Next.

Then select the Empty Activity and click Next.

Finally click Finish.

It will take some time to build and load the project.
After completion it will look as given below.

Designing layout for the Android Application:

Click on app -> res -> layout -> activity_main.xml

Now click on Text as shown below.

Then delete the code which is there and type the code as given below.

Code for Activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <ListView android:id="@+id/listView" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout>

Now click on Design and your application will look as given below.

So now the designing part is completed.

Adding permissions in Manifest for the Android Application:

Click on app -> manifests -> AndroidManifest.xml

Now include the INTERNET permissions in the AndroidManifest.xml file as shown below

Code for AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.exno6" > <uses-permission android:name="android.permission.INTERNET"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>

So now the Permissions are added in the Manifest.

Java Coding for the Android Application:

Click on app -> java -> com.example.exno6 -> MainActivity.

Then delete the code which is there and type the code as given below.

Code for MainActivity.java:

package com.example.exno6; import android.app.ListActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List; public class MainActivity extends ListActivity
{ List headlines; List links; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); new MyAsyncTask().execute(); } class MyAsyncTask extends AsyncTask<Object,Void,ArrayAdapter> { @Override protected ArrayAdapter doInBackground(Object[] params) { headlines = new ArrayList(); links = new ArrayList(); try { URL url = new URL("https://codingconnect.net/feed"); XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); factory.setNamespaceAware(false); XmlPullParser xpp = factory.newPullParser(); // We will get the XML from an input stream xpp.setInput(getInputStream(url), "UTF_8"); boolean insideItem = false; // Returns the type of current event: START_TAG, END_TAG, etc.. int eventType = xpp.getEventType(); while (eventType != XmlPullParser.END_DOCUMENT) { if (eventType == XmlPullParser.START_TAG) { if (xpp.getName().equalsIgnoreCase("item")) { insideItem = true; } else if (xpp.getName().equalsIgnoreCase("title")) { if (insideItem) headlines.add(xpp.nextText()); //extract the headline } else if (xpp.getName().equalsIgnoreCase("link")) { if (insideItem) links.add(xpp.nextText()); //extract the link of article } } else if(eventType==XmlPullParser.END_TAG && xpp.getName().equalsIgnoreCase("item")) { insideItem=false; } eventType = xpp.next(); //move to next element } } catch (MalformedURLException e) { e.printStackTrace(); } catch (XmlPullParserException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } protected void onPostExecute(ArrayAdapter adapter) { adapter = new ArrayAdapter(MainActivity.this, android.R.layout.simple_list_item_1, headlines); setListAdapter(adapter); } } @Override protected void onListItemClick(ListView l, View v, int position, long id) { Uri uri = Uri.parse((links.get(position)).toString()); Intent intent = new Intent(Intent.ACTION_VIEW, uri); startActivity(intent); } public InputStream getInputStream(URL url) { try { return url.openConnection().getInputStream(); } catch (IOException e) { return null; } }
}