title: parse String and put it into tab title
body: <p>i want to parse my xml and display the strings they i have parse on my pagetitles.But i get a nullponiterexception.</p>
  
  <p>here is my splashactivity:</p>
  
  <pre><code>package de.heron.xmlpullparser;
  
  import java.lang.reflect.Array;
  import java.util.ArrayList;
  import java.util.List;
  
  import android.app.ProgressDialog;
  import android.content.Context;
  import android.content.Intent;
  import android.os.AsyncTask;
  import android.os.Bundle;
  import android.os.Handler;
  import android.support.v4.app.Fragment;
  import android.support.v4.app.FragmentActivity;
  import android.support.v4.app.FragmentManager;
  import android.support.v4.app.FragmentPagerAdapter;
  import android.view.Menu;
  import android.view.MenuInflater;
  import android.view.MenuItem;
  import de.heron.R;
  import de.heron.SettingsActivity;
  import de.heron.model.RoomReader;
  import de.heron.parser.RoomParser;
  
  public class SplashActivity extends FragmentActivity{
      private RoomParser mNewsFeeder;
      private List&lt;RoomReader&gt; mRssFeedList;
      private static final String TOPSTORIES =
              "URL";
      public static String[] TabTitles = {RoomReader.getName()};
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_striptabs);
          mRssFeedList = new ArrayList&lt;RoomReader&gt;();
          new DoRssFeedTask().execute(TOPSTORIES);    
      }
  
      static class RssHolder {
          //textview textview1; usw...
  
      }
  
      public class DoRssFeedTask extends AsyncTask&lt;String, Void, List&lt;RoomReader&gt;&gt; {
          ProgressDialog prog;
          String jsonStr = null;
          Handler innerHandler;
  
          @Override
          protected void onPreExecute() {
              //Context context = getContext();
              prog = new ProgressDialog(SplashActivity.this);
              prog.setMessage("Loading....");
              prog.show();
          }
  
          @Override
          protected List&lt;RoomReader&gt; doInBackground(String... params) {
              for (String urlVal : params) {
                  mNewsFeeder = new RoomParser(urlVal);
              }
              mRssFeedList = mNewsFeeder.parse();
              return mRssFeedList;
          }
  
          @Override
          protected void onPostExecute(List&lt;RoomReader&gt; result) {
              prog.dismiss();
              String key = "key";
               Bundle b=new Bundle();
               b.putStringArray(key, new String[]{RoomReader.getName()});
               Intent i=new Intent(SplashActivity.this, MainActivity.class);
               i.putExtras(b);
               SplashActivity.this.startActivity(i);
          }
  
          @Override
          protected void onProgressUpdate(Void... values) {
          }
      }  
    }
  </code></pre>
  
  <p>here is my fragment adapter:</p>
  
  <pre><code>    public class MyPagerAdapter extends FragmentPagerAdapter{
  String key = "key";
          Bundle b = MainActivity.this.getIntent().getExtras();
      //public final String[] TITLES =  b.getStringArray(key);
          public final String[] TITLES = SplashActivity.TabTitles;
          public MyPagerAdapter(FragmentManager fm) {
              super(fm);
          }
          @Override
          public CharSequence getPageTitle(int position) {
              return SplashActivity.TabTitles[position];//TITLES[position];
  
               }
          @Override
          public Fragment getItem(int position) {
              Fragment fragment = new Fragment1();
              Bundle args = new Bundle();
              args.putInt(Fragment1.position, position + 1);
              fragment.setArguments(args);
              return fragment;
          }
          /*@Override  
          public Fragment getItem(int position) {  
              Fragment fragment = new Fragment();  
              switch (position) {  
              case 0:  
                  return fragment = new Fragment1();  
              case 1:  
                  return fragment = new Fragment2();
              default:  
                  break;  
              }  
              return fragment;  
      }*/
  
          @Override
          public int getCount() {
              return TITLES.length;
          }
      }
  </code></pre>
  
  <p>and here is my asyntask in my mainactivty :</p>
  
  <pre><code> private class RssAdapter extends ArrayAdapter&lt;RoomReader&gt; {
          public RssAdapter(Context context, int textViewResourceId, List&lt;RoomReader&gt; rssFeedLst) {
              super(context, textViewResourceId, rssFeedLst);
          }
  
          @Override
          public View getView(int position, View convertView, ViewGroup parent) {
  
              View view = convertView;
              RssHolder rssHolder = null;
              if (convertView == null) {
                  //textview id setzten usw..
                  view.setTag(rssHolder);
              } else {
                  rssHolder = (RssHolder) view.getTag();
                  //textview set text RoomReader.getName() usw...
              }
  
              return view;
          }
      }
  
      static class RssHolder {
          //textview textview1; usw...
  
      }
  
      public class DoRssFeedTask extends AsyncTask&lt;String, Void, List&lt;RoomReader&gt;&gt; {
          ProgressDialog prog;
          String jsonStr = null;
          Handler innerHandler;
  
          @Override
          protected void onPreExecute() {
              //Context context = getContext();
              prog = new ProgressDialog(MainActivity.this);
              prog.setMessage("Loading....");
              prog.show();
          }
  
          @Override
          protected List&lt;RoomReader&gt; doInBackground(String... params) {
              for (String urlVal : params) {
                  mNewsFeeder = new RoomParser(urlVal);
              }
              mRssFeedList = mNewsFeeder.parse();
              return mRssFeedList;
          }
  
          @Override
          protected void onPostExecute(List&lt;RoomReader&gt; result) {
              prog.dismiss();
  
          }
  
          @Override
          protected void onProgressUpdate(Void... values) {
          }
  }
  </code></pre>
  
  <p>the oncreate from my mainactivity:</p>
  
  <pre><code> private ListView mRssListView;
      private RoomParser mNewsFeeder;
      private List&lt;RoomReader&gt; mRssFeedList;
      private RssAdapter mRssAdap;
      private static final String TOPSTORIES =
              "the url";
      private PagerSlidingTabStrip tabs;
      private ViewPager pager;
      private MyPagerAdapter adapter;
       private static TextToSpeech tts;
          private static final int REQUEST_CODE = 1234;
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_striptabs);
          tts = new TextToSpeech(this, this);
          mRssFeedList = new ArrayList&lt;RoomReader&gt;();
          new DoRssFeedTask().execute(TOPSTORIES);
          tabs = (PagerSlidingTabStrip) findViewById(R.id.tabs);
          pager = (ViewPager) findViewById(R.id.pager);
          adapter = new MyPagerAdapter(getSupportFragmentManager());
          pager.setAdapter(adapter);
          final int pageMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, getResources()
                  .getDisplayMetrics());
          pager.setPageMargin(pageMargin);
          tabs.setViewPager(pager);
      }   
  </code></pre>
  
  <p>Log:</p>
  
  <pre><code>08-12 18:06:00.110: E/AndroidRuntime(21128): FATAL EXCEPTION: main
  08-12 18:06:00.110: E/AndroidRuntime(21128): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.heron/de.heron.xmlpullparser.MainActivity}: java.lang.NullPointerException
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.os.Handler.dispatchMessage(Handler.java:99)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.os.Looper.loop(Looper.java:137)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.ActivityThread.main(ActivityThread.java:5103)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at java.lang.reflect.Method.invokeNative(Native Method)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at java.lang.reflect.Method.invoke(Method.java:525)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at dalvik.system.NativeStart.main(Native Method)
  08-12 18:06:00.110: E/AndroidRuntime(21128): Caused by: java.lang.NullPointerException
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at com.astuetz.viewpager.extensions.PagerSlidingTabStrip.notifyDataSetChanged(PagerSlidingTabStrip.java:200)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at com.astuetz.viewpager.extensions.PagerSlidingTabStrip.setViewPager(PagerSlidingTabStrip.java:182)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at de.heron.xmlpullparser.MainActivity.onCreate(MainActivity.java:72)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.Activity.performCreate(Activity.java:5133)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
  08-12 18:06:00.110: E/AndroidRuntime(21128):    ... 11 more
  </code></pre>