Fetching PNR status from PNR no. using json

Fetching PNR status from PNR no. using json

I am android beginner and trying to fetch pnr status using json here is my
code which is not working please help me . Also tell me which parsing
method is goo xml parse or json parse. When you asking questions, using
some more words to describe your problem will always help. If there are
really nothing more to say, just copy some random paragraph from internet,
but make sure you mark them as dummy text so that people won't pay
attention on them.
public class JSON extends Activity {
String completeData="";
TextView tv;
EditText et;
Button bt;
HttpClient client;
JSONObject jsonobj;
final static String URI="http://pnrapi.alagu.net/api/v1.0/pnr/";
String pnr_no=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_json);
tv=(TextView) findViewById(R.id.textView1);
et=(EditText) findViewById(R.id.editText1);
bt=(Button) findViewById(R.id.button1);
client=new DefaultHttpClient();
}
public void showpnr(View v){
pnr_no=et.getText().toString();
if(pnr_no.equals("")){
Toast.makeText(this, "Enter the Valid Pnr",
Toast.LENGTH_LONG).show();
return;
}
GetPNR pnr=new GetPNR();
pnr.execute("train-name");
completeData="";
}
public JSONArray pnr(String username){
JSONArray jarray=null;
try
{
StringBuilder builder=new StringBuilder(URI);
builder.append(username);
HttpGet get=new HttpGet(builder.toString());
HttpResponse response=client.execute(get);
int status =response.getStatusLine().getStatusCode();
if(status==200){
HttpEntity entity=response.getEntity();
String data=EntityUtils.toString(entity);
jarray=new JSONArray(data);
}
else{
Toast.makeText(this, "Error", Toast.LENGTH_LONG).show();
}
}catch(ClientProtocolException e){
e.printStackTrace();
}
catch(IOException e){
e.printStackTrace();
}
catch(JSONException e){
e.printStackTrace();
}
catch(Exception e){
e.printStackTrace();
}
return jarray;
}
JSONObject js_pnr=new JSONObject();
public class GetPNR extends AsyncTask<String, Integer, ArrayList<String>>
{
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
tv.setText("Loading Pnr status");
super.onPreExecute();
}
@Override
protected ArrayList<String> doInBackground(String... params) {
// TODO Auto-generated method stub
ArrayList<String> al_texts=new ArrayList<String>();
try{
JSONArray data =pnr(pnr_no);
if(data==null){
return null;
}
int count=data.length();
JSONObject jobj=new JSONObject();
for(int i=0;i<count;i++){
jobj=data.getJSONObject(i);
al_texts.add(jobj.getString("train-name").toString());
}
return al_texts;
}catch(JSONException e){
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(ArrayList<String> al_pnrText) {
if(al_pnrText==null){
tv.setText("Pnr not found");
return;
}
for(String string:al_pnrText){
completeData+=string+System.getProperty("line.seperator")
+System.getProperty("line.seperator");
}
tv.setText("pnr
status:"+System.getProperty("line.seperator")+completeData);
}
}
}