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POHow to change the screen in android after clicking on ListItem using Intent and ListActivity
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  1. POHow to change the screen in android after clicking on ListItem using Intent and ListActivity
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    copied!<p>Following is the code I am working with. I am getting a runtime error after clicking on a list item. I should go to next screen, but I get an error: <code>the application has stopped unexpectedly</code>. Could you please tell me what's wrong?</p> <pre><code>package com.pxr.tutorial.xmltest; import java.util.ArrayList; import java.util.HashMap; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import android.app.ListActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.Toast; public class Main extends ListActivity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); myrequest(); } void myrequest() { setContentView(R.layout.myrequest); ArrayList&lt;HashMap&lt;String, String&gt;&gt; mylist = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); String xml = XMLfunctions.getXML("http://10.0.2.2/ss.htm"); Document doc = XMLfunctions.XMLfromString(xml); int numResults = XMLfunctions.numResults(doc); if((numResults &lt;= 0)){ Toast.makeText(Main.this, "Error", Toast.LENGTH_LONG).show(); finish(); } NodeList nodes = doc.getElementsByTagName("result"); for (int i = 0; i &lt; nodes.getLength(); i++) { HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;(); Element e = (Element)nodes.item(i); map.put("id", XMLfunctions.getValue(e, "id")); map.put("name", XMLfunctions.getValue(e, "id") + "-" + XMLfunctions.getValue(e, "name") + " :"); mylist.add(map); } ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.main, new String[] { "name"}, new int[] { R.id.item_title }); setListAdapter(adapter); final ListView lv = getListView(); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { @SuppressWarnings("unchecked") HashMap&lt;String, String&gt; o = (HashMap&lt;String, String&gt;) lv.getItemAtPosition(position); Toast.makeText(Main.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_LONG).show(); Main.this.finish(); Intent i = new Intent(Main.this, Details.class); startActivity(i); // details(o.get("id")); } }); } void details(String id) { Details dt=new Details(); dt.det(id); // setContentView(R.layout.details); } } </code></pre> <p><code>Details.java</code> file is : </p> <pre><code>package com.pxr.tutorial.xmltest; import android.app.Activity; import android.os.Bundle; public class Details extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simple); } } </code></pre>
 

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