Cant display data when switching view
<p>I am new to android and needs some help. I am having a problem with the function of switching views. I am developing a Golf application and the program is supposed to take peoples handicaps and pair them into teams after certain rules.</p>

<p>The program is working just fine, until I implement a function using switched views. The problem occurs when the "user" should fill the handicap of the players in unsorted_teams.xml and then click on a button called next_button and switch view to unsorted_teams2.xml which will display all the possible team-arrangements depending on the data being filled at unsorted_teams.xml.</p>

<p>When I use this view switcher, I keep getting a nullpointerException. When I have everything under the same xml file, its working just fine. So I assume there is nothing wrong with my code, just how I handle the switcher between UnsortedTeams.java, unsorted_teams.xml and UnsortedTeams2.java, unsorted_teams2.xml.</p>

<pre><code>public class UnsortedTeams extends Activity {

 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.unsorted_teams);
 }
}
</code></pre>

<p>This is the  UnsortedTeams java class, nothing interesting so far, so lets move along :)</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;

&lt;TableLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/table2"
    android:background="#adaeb5"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:stretchColumns="1"
    android:weightSum="1.0"
    android:gravity="left"&gt;

&lt;TableRow
        android:gravity="center"
        android:background="#adaeb5"&gt;
            &lt;Button 
            android:layout_height="wrap_content" 
            android:layout_width="100px" 
            android:id="@+id/next_button" 
            android:text="Submit"&gt;&lt;/Button&gt;  

&lt;/TableRow&gt;  


  &lt;/TableLayout&gt;
</code></pre>

<p>This is the unsorted_teams.xml file which has the next_button who switches the view to unsorted_teams2.xml. Lets move along</p>

<p>Note that I will only include the code that handles the switch:</p>

<p>This is my main java class:  ------------></p>

<pre><code> @Override

    public void onCreate( Bundle savedInstanceState ) 
    {


super.onCreate( savedInstanceState );


setContentView( R.layout.main );


spec = tabHost.newTabSpec("unsorted_teams").setIndicator("UnsortedTeams",

                res.getDrawable(R.drawable.ic_tab_images))
                    .setContent(R.id.table2);

        tg = new TeamGenerator(this);

next_button = (Button)findViewById(R.id.next_button);

next_button.setOnClickListener( mNextListener );


 private OnClickListener mNextListener = new View.OnClickListener() 

    {
        public void onClick(View view) 
        {
            Intent myIntent = new Intent(view.getContext(), UnsortedTeams2.class);
            startActivityForResult(myIntent, 0);
            int hcp1 = Integer.parseInt( ( unsorted_team_hcp1.getText().toString() ) );
            int hcp2 = Integer.parseInt( ( unsorted_team_hcp2.getText().toString() ) );
            int hcp3 = Integer.parseInt( ( unsorted_team_hcp3.getText().toString() ) );
            int hcp4 = Integer.parseInt( ( unsorted_team_hcp4.getText().toString() ) );

            List&lt;Result&gt; result = tg.getTeamResultCombinations(hcp1, hcp2, hcp3, hcp4);

            if( result != null )
            {
                Result r1 = result.get(0);

                Result r2 = result.get(1);

                Result r3 = result.get(2);

            result_1_exp.setText(r1.getExp()+"");
                result_1_win.setText(r1.getWin()+"");
                result_1_draw.setText(r1.getDraw()+"");
                result_1_loss.setText(r1.getLoss()+"");


When the program reads result_1_exp.setText(r1.getExp()+""); this occurs:

02-26 00:17:20.499: ERROR/AndroidRuntime(631): FATAL EXCEPTION: main
02-26 00:17:20.499: ERROR/AndroidRuntime(631): java.lang.NullPointerException
02-26 00:17:20.499: ERROR/AndroidRuntime(631):     at com.tiebreaker.gui.tiebreaker$1.onClick(tiebreaker.java:195)



public class UnsortedTeams2 extends Activity {

    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.unsorted_teams2);


        Button next = (Button) findViewById(R.id.submit3_button);
        next.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                Intent intent = new Intent();
                setResult(RESULT_OK, intent);
                finish();
            }

        });
    }}
</code></pre>

<p>This is the Class UnsortedTeams2 where the data is supposed to be displayed, but since its a switched view from UnsortedTeams it does not work. The button next_button can be found in my main class higher in the code, which is the button who triggers the "activity". Ive also implemented an activity in the AndroidManifest.xml file. </p>

<p>NOTE that the code works fine for only switching views, but when I try to get ( load ) the data and read it in unsorted_teams2.xml everything crashes as described above. As for now I am not using switched views and run everything under the same xml file, and its working fine. I hope someone understands my problem and have ideas how to solve this. Thx in advance.</p>
