JSON How

package com.vj.activitycallbacks;
 
import java.io.IOException;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
 
import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
 
 
public class MainActivity extends Activity {
 
	JSONObject ja;
	HttpClient client;
	TextView tv1;
	private String result;
	final static String URL = "http://api.twitter.com/1/statuses/user_timeline.json?screen_name=";
	public static final String TAG = "com.vj.activitycallbacks.MainActivity";
 
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		tv1 = (TextView) findViewById(R.id.textView1);
		Log.i(TAG, "onCreate");
 
		new MyAsyncTask().execute("text");
 
	}
	public JSONObject lastTweet(String name) throws ClientProtocolException,
	IOException, JSONException {
		client=new DefaultHttpClient();
StringBuilder url = new StringBuilder(URL);
Log.e(TAG, "status"+1);
url.append(name);
Log.e(TAG, "status"+2);
HttpGet hg = new HttpGet(url.toString());
Log.e(TAG, "status"+3);
HttpResponse r = client.execute(hg);
Log.e(TAG, "status"+4);
int status = r.getStatusLine().getStatusCode();
Log.e(TAG, "status"+status);
if (status == 200) {
	HttpEntity ent = r.getEntity();
	String data = EntityUtils.toString(ent);
	JSONArray jarray = new JSONArray(data);
	ja = jarray.getJSONObject(0);
	Log.e(TAG, "success fetching data");
	return ja;
 
} else {
	Log.e(TAG, "some error"); 
	return null;
}
}
 
 
	@Override
	protected void onRestart() {
		// TODO Auto-generated method stub
		super.onRestart();
		Log.i(TAG, "onRestart");
	}
 
	@Override
	protected void onStart() {
		// TODO Auto-generated method stub
		super.onStart();
		Log.i(TAG, "onStart");
	}
 
	@Override
	protected void onRestoreInstanceState(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onRestoreInstanceState(savedInstanceState);
		Log.i(TAG, "onRestoreInstanceState");
	}
 
	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		Log.i(TAG, "onResume");
	}
 
	@Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		Log.i(TAG, "onPause");
	}
 
	@Override
	protected void onSaveInstanceState(Bundle outState) {
		// TODO Auto-generated method stub
		super.onSaveInstanceState(outState);
		Log.i(TAG, "onSaveInstanceState");
	}
 
	@Override
	protected void onStop() {
		// TODO Auto-generated method stub
		super.onStop();
		Log.i(TAG, "onStop");
	}
 
	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		Log.i(TAG, "onDestroy");
	}
 
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		Log.i(TAG, "");
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}
 
	public void onListActivity(View v) {
		Intent in = new Intent(MainActivity.this, ListActivity.class);
	}
 
 
	public class MyAsyncTask extends AsyncTask<String, Integer, String> {
 
		@Override
		protected String doInBackground(String... params) {
			String result = null;
			try {
				 ja = lastTweet("vijaydeprabu1");
 
					result = ja.getString("text");
					return result;
 
 
			} catch (ClientProtocolException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				Log.e(TAG, e.toString());
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				Log.e(TAG, e.toString());
			} catch (JSONException e) {
 
				e.printStackTrace();
				Log.e(TAG, e.toString());
			}
			return null;
 
 
		}
 
		@Override
		protected void onPostExecute(String result1) {
			tv1.setText(result1);
 
		}
 
	}
 
}