Android Open Source - android-jsonarrayadapter Example Activity

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Back to project page android-jsonarrayadapter.

License

The source code is released under:

Apache License

Java Source Code

package com.readystatesoftware.android;
//from w w  w .j  a  va2  s .  c  o m
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URLEncoder;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.ListActivity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.Toast;

/**
 * @author jgilfelt
 */
public class ExampleActivity extends ListActivity implements OnItemClickListener {

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    new SearchTwitterTask().execute("#AndroidDev");
  }

  class SearchTwitterTask extends AsyncTask<String, Integer, String> {

    @Override
    protected String doInBackground(String... arg0) {
      String url = "http://search.twitter.com/search.json?q=" + URLEncoder.encode(arg0[0]);
      try {
        HttpClient client = new DefaultHttpClient();
        HttpGet request = new HttpGet(url);
        HttpResponse response = client.execute(request);
        BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
        String line = "";
        String json = "";
        while ((line = rd.readLine()) != null) {
          json += line;
        }
        rd.close();
        return json;
      } catch (Exception e) {
        e.printStackTrace();
        return null;
      }
    }

    @Override
    protected void onPostExecute(String result) {
      try {
        showData(result);
      } catch (JSONException e) {
        e.printStackTrace();
        Toast.makeText(ExampleActivity.this, "something went wrong", Toast.LENGTH_SHORT).show();
      }  
    }

  }

  private void showData(String json) throws JSONException {
    JSONObject o = new JSONObject(json);
    JSONArray data = o.getJSONArray("results");

    ListAdapter adapter = new JSONArrayAdapter(this,
        data,                          // JSONArray data              
        android.R.layout.simple_list_item_2,           // a layout resource to display a row
        new String[] {"from_user", "text"},            // field names from JSONObjects
        new int[] {android.R.id.text1, android.R.id.text2},    // corresponding View ids to map field names to 
        "id"                          // id field from JSONObjects (optional)
    );

    getListView().setAdapter(adapter);
    getListView().setOnItemClickListener(this);
  }

  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    Toast.makeText(ExampleActivity.this, "clicked tweet id " + id, Toast.LENGTH_SHORT).show();
  }

}

Java Source Code List

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