how to save the state of previous activity which is get some data from another activity?
<pre><code>@Override
public void onCreate(Bundle savedInstanceState) 
{   
     super.onCreate(savedInstanceState);
     setContentView(R.layout.list_view1);
     params=new String[10];         
     params[0]=getIntent().getStringExtra("parent_id");
     params[1]=getIntent().getStringExtra("childname");
     String back=getIntent().getStringExtra("back");
     System.out.println("parameter of intent :"+params[0]);
     System.out.println("parameter of intent :"+params[1]);
     gridview=(GridView)findViewById(R.id.gridview);
   if(back==null)
   {    
     new ImageUrlTask().execute(params);
     System.out.println("created first........"+back);
   }
   else
       System.out.println("I am back........"+back);
   } 
</code></pre>

<p>above <code>onCreate</code> method already get the value from some other activity, when I call 
this activity again then I get black page.</p>

<p>please suggest me what should I do for this </p>
