hello, i want to ask how to implement progress bar spinner in
background and then stop when parsing JSON data finish to list view.
this my source code.
package com.cob.json;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
public class JSONListViewActivity extends Activity {
/** Called when the activity is first created. */
//ListView that will hold our items references back to main.xml
ListView lstTest;
//Array Adapter that will hold our ArrayList and display the items
on the ListView
ProjectsAdapter arrayAdapter;
//List that will host our items and allow us to modify that array
adapter
ArrayList<Projects> prjcts=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Initialize ListView
lstTest= (ListView)findViewById(R.id.lstText);
//Initialize our ArrayList
prjcts = new ArrayList<Projects>();
//Initialize our array adapter notice how it references the
listitems.xml layout
arrayAdapter = new ProjectsAdapter(JSONListViewActivity.this,
R.layout.list_item,prjcts);
//Set the above adapter as the adapter of choice for our list
lstTest.setAdapter(arrayAdapter);
//Instantiate the Web Service Class with he URL of the web
service not that you must pass
WebService webService = new WebService("http://
frontine.hostoi.com/jsontest.json");
//Pass the parameters if needed , if not then pass dummy one
as follows
Map<String, String> params = new HashMap<String, String>();
params.put("var", "");
//Get JSON response from server the "" are where the method
name would normally go if needed example
// webService.webGet("getMoreAllerts", params);
String response = webService.webGet("", params);
try
{
//Parse Response into our object
Type collectionType = new TypeToken<ArrayList<Projects>>()
{}.getType();
//JSON expects an list so can't use our ArrayList from the
lstart
List<Projects> lst= new Gson().fromJson(response,
collectionType);
//Now that we have that list lets add it to the ArrayList
which will hold our items.
for(Projects l : lst)
{
prjcts.add(l);
}
//Since we've modified the arrayList we now need to notify
the adapter that
//its data has changed so that it updates the UI
arrayAdapter.notifyDataSetChanged();
}
catch(Exception e)
{
Log.d("Error: ", e.getMessage());
}
}
protected void onListItemClick(ListView lstTest, View v, int
position, long id) {
// TODO Auto-generated method stub
//super.onListItemClick(l, v, position, id);
String selection =
lstTest.getItemAtPosition(position).toString();
Toast.makeText(this, selection, Toast.LENGTH_LONG).show();
}
}
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