JSON Parsing

Step 1.

JSONParser.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;

import android.util.Log;

public class JSONParser {

InputStream is = null;
JSONObject jObj = null;
String json = "";

// constructor
public JSONParser() {
}

public String getJSONFromUrl(String url) {

// Making HTTP request
try {

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
Log.e("response", "" + httpResponse);

HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();

} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
json = sb.toString();
is.close();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
return json;
}


}

Sept 2.

MainHome.java

import java.util.HashMap;

import java.util.LinkedList;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.Activity;

import android.app.Dialog;

import android.os.AsyncTask;

import android.os.Bundle;

import android.widget.ListView;

public class MainActivity extends Activity {

ListView lvdata;

LinkedList<HashMap<String, String>> aldata = new LinkedList<HashMap<String, String>>();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();

new getData().execute();

}

void init() {

lvdata = (ListView) findViewById(R.id.lvdata);

}

private class getData extends AsyncTask<Void, Void, String> {

Dialog dialog;

String url;

@Override

protected void onPreExecute() {

super.onPreExecute();

}

@Override

protected String doInBackground(Void... params) {

url = "Enter your url";

JSONParser jParser = new JSONParser();

String json = jParser.getJSONFromUrl(url);

try {

JSONObject jobject = new JSONObject(json);

int success = jobject.getInt("success");

for (int i = 0; i < jobject.length() - 1; i++) {

JSONObject jobj = jobject

.getJSONObject(Integer.toString(i));

if (success == 1) {

HashMap<String, String> hm = new HashMap<String, String>();

hm.put("p_name", jobj.getString("p_name"));

hm.put("p_title", jobj.getString("p_title"));

aldata.add(hm);

}

}

} catch (JSONException e) {

e.printStackTrace();

}

return null;

}

@Override

protected void onPostExecute(String result) {

super.onPostExecute(result);

if (dialog != null)

if (dialog.isShowing())

dialog.dismiss();

Custom_Adapter adapter = new Custom_Adapter(

(Activity) MainActivity.this, aldata);

lvdata.setAdapter(adapter);

}

}

}

3. Custom Adapter

Custom_Adapter.java

import java.util.HashMap;

import java.util.LinkedList;

import android.app.Activity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.TextView;

public class Custom_Adapter extends ArrayAdapter<HashMap<String, String>> {

private final Activity context;

private final LinkedList<HashMap<String, String>> allData;

public Custom_Adapter(Activity context,

LinkedList<HashMap<String, String>> list) {

super(context, R.layout.custom_list, list);

this.context = context;

this.allData = list;

}

static class ViewHolder {

TextView tvname, tvinfo;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

View view = convertView;

view = null;

if (view == null) {

LayoutInflater inflator = context.getLayoutInflater();

view = inflator.inflate(R.layout.custom_list, null);

final ViewHolder viewHolder = new ViewHolder();

initAll(view, viewHolder);

view.setTag(viewHolder);

}

ViewHolder holder = (ViewHolder) view.getTag();

fillAll(holder, position);

return view;

}

public void initAll(View view, ViewHolder viewHolder) {

viewHolder.tvname = (TextView) view.findViewById(R.id.tvname);

viewHolder.tvinfo = (TextView) view.findViewById(R.id.tvinfo);

}

public void fillAll(final ViewHolder holder, final int position) {

holder.tvname.setText(allData.get(position).get("p_name"));

holder.tvinfo.setText(allData.get(position).get("p_title"));

}

}