Question

I have written android class which will call RESTful web service. If request is successful,
response will be JSON object. I write android class like this:

public class android extends Activity {

    public void onCreate(Bundle savedInstanceState)
    {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    TextView txt = (TextView) findViewById(R.id.textView1);
    txt.setText(getInputStreamFromUrl("http://localhost:8080/kyaw"));
    }

    public static String getInputStreamFromUrl(String url) {
          InputStream content = null;
          try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response = httpclient.execute(new HttpGet(url));
            content = response.getEntity().getContent();
          } catch (Exception e) {
            Log.e("[GET REQUEST]", "Network exception");
          }
            String result=convert(content);
            return result;
        }

    private static String convert(InputStream in)
    {
        BufferedReader reader=new BufferedReader(new InputStreamReader(in));
        StringBuilder sb=new StringBuilder();
        String line=null;
        try{
            while((line=reader.readLine())!=null){
                sb.append(line+"\n");
            }
        }catch(Exception e)
        {
            e.printStackTrace();
        }finally{
            try{
                in.close();
            }catch(IOException e){
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

}

I have a problem after i run.I will get exception coz i return as a string.But response is JSON .How should I convert JSON to String or other way and then how to show result in android screen?

thanks

Answer 1

well “http://localhost:8080/kyaw” is a problem … by this you poining to emulator not emulator’s host … and you getting network error

try “http://ip.of.your.host:8080/kyaw”

EDIT:

        content = response.getEntity().getContent();// here comes an error
      } catch (Exception e) {
        Log.e("[GET REQUEST]", "Network exception");//we catch it here
      }
      //here you got content == null
      //so you getting null point exception