title: JSON Android And Listview
body: <p>I'm looking for a good tutorial to parse JSON into Listview in Android.</p>
  
  <p>The problem is my JSON file is like this </p>
  
  <pre><code>[{"location_id":"823","company_id":"41","name":"Milj\u00f8station","address":"Aldersro \/ Aldersro 8","place":"","postal":"5700","city":"Svendborg","monday":"","tuesday":"","wednesday":"","thursday":"","friday":"","saturday":"","sunday":"","type":"2","lat":"55.061426149085","lng":"10.5927246809006","nocar":"0","distance":"0.00023254303859579"}]
  </code></pre>
  
  <p>Most tutorials starting with a Json array, and later the data. I know there is a lot of examples but i couldn't find some it that match my problem.</p>
  
  <p>I added code, but still it's not working, here is my 3 classes.</p>
  
  <p><strong>SingleMenuItemActivity</strong></p>
  
  <pre><code>public class SingleMenuItemActivity  extends Activity {
  
  // JSON node keys
  private static final String TAG_NAME = "name";
  private static final String TAG_EMAIL = "email";
  private static final String TAG_PHONE_MOBILE = "mobile";
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.single_list_item);
  
      // getting intent data
      Intent in = getIntent();
  
      // Get JSON values from previous intent
      String name = in.getStringExtra(TAG_NAME);
      String cost = in.getStringExtra(TAG_EMAIL);
      String description = in.getStringExtra(TAG_PHONE_MOBILE);
  
      // Displaying all values on the screen
      TextView lblName = (TextView) findViewById(R.id.name_label);
      TextView lblCost = (TextView) findViewById(R.id.email_label);
      TextView lblDesc = (TextView) findViewById(R.id.mobile_label);
  
      lblName.setText(name);
      lblCost.setText(cost);
      lblDesc.setText(description);
  } }
  </code></pre>
  
  <p><strong>JSONParser</strong></p>
  
  <pre><code>public class JSONParser {
  
  static InputStream is = null;
  static JSONObject jObj = null;
  static String json = "";
  
  // constructor
  public JSONParser() {
  
  }
  
  public JSONObject getJSONFromUrl(String url) {
  
      // Making HTTP request
      try {
          // defaultHttpClient
          DefaultHttpClient httpClient = new DefaultHttpClient();
          HttpPost httpPost = new HttpPost(url);
  
          HttpResponse httpResponse = httpClient.execute(httpPost);
          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");
          }
          is.close();
          json = sb.toString();
      } catch (Exception e) {
          Log.e("Buffer Error", "Error converting result " + e.toString());
      }
  
      // try parse the string to a JSON object
      try {
          jObj = new JSONObject(json);
      } catch (JSONException e) {
          Log.e("JSON Parser", "Error parsing data " + e.toString());
      }
  
      // return JSON String
      return jObj;
  } }
  </code></pre>
  
  <p><strong>AndroidJSONParserActvity</strong></p>
  
  <pre><code>public class AndroidJSONParsingActivity extends ListActivity {
  
  // url to make request
  private static String url = "http://webservice.xxx.com/webservice/getLocationList.php?lat=55.061424255371094&amp;lng=10.592724800109863";
  
  // JSON Node names
  private static final String TAG_Location = "location_id";
  private static final String TAG_Company = "company_id";
  private static final String TAG_NAME = "name";
  private static final String TAG_ADDRESS = "address";
  private static final String TAG_PLACE = "place";
  private static final String TAG_POSTAL = "postal";
  private static final String TAG_CITY = "city";
  private static final String TAG_MONDAY = "monday";
  private static final String TAG_TUESDAY = "tuesday";
  private static final String TAG_WEDNESDAY = "wednesday";
  private static final String TAG_THURSDAY = "thursday";
  private static final String TAG_FRIDAY = "friday";
  private static final String TAG_SATURDAY = "saturday";
  private static final String TAG_SUNDAY = "sunday";
  private static final String TAG_TYPE = "type";
  private static final String TAG_LAT = "lat";
  private static final String TAG_LNG = "lng";
  private static final String TAG_NOCAR = "nocar";
  
  
  
  // contacts JSONArray
  JSONArray contacts = null;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
  
      // Hashmap for ListView
      ArrayList&lt;HashMap&lt;String, String&gt;&gt; contactList = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;();
  
      // Creating JSON Parser instance
      JSONParser jParser = new JSONParser();
  
      // getting JSON string from URL
      JSONObject json = jParser.getJSONFromUrl(url);
  
      try {
  
          // looping through All Contacts
          for(int i = 0; i &lt; contacts.length(); i++){
              JSONObject c = contacts.getJSONObject(i);
  
              // Storing each json item in variable
              String location_id = c.getString(TAG_Location);
              String company_id = c.getString(TAG_Company);
              String name = c.getString(TAG_NAME);
              String address = c.getString(TAG_ADDRESS);
              String place = c.getString(TAG_PLACE);  
              String postal = c.getString(TAG_POSTAL);
              String city = c.getString(TAG_CITY);
              String monday = c.getString(TAG_MONDAY);
              String tuesday = c.getString(TAG_TUESDAY);
              String wednesday = c.getString(TAG_WEDNESDAY);  
              String thursday = c.getString(TAG_THURSDAY);
              String friday = c.getString(TAG_FRIDAY);
              String saturday = c.getString(TAG_SATURDAY);
              String sunday = c.getString(TAG_SUNDAY);
              String type = c.getString(TAG_TYPE);
              String lat = c.getString(TAG_LAT);
              String lng = c.getString(TAG_LNG);
              String nocar = c.getString(TAG_NOCAR);
  
  
          // creating new HashMap
              HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;();
  
              // adding each child node to HashMap key =&gt; value
              map.put(TAG_Location, location_id);
              map.put(TAG_Company, company_id);
              map.put(TAG_NAME, name);
              map.put(TAG_ADDRESS, address);
              map.put(TAG_PLACE, place);
              map.put(TAG_POSTAL, postal);
              map.put(TAG_CITY, city);
              map.put(TAG_MONDAY, monday);
              map.put(TAG_TUESDAY, tuesday);
              map.put(TAG_WEDNESDAY, wednesday);
              map.put(TAG_THURSDAY, thursday);
              map.put(TAG_FRIDAY, friday);
              map.put(TAG_SATURDAY, saturday);
              map.put(TAG_SUNDAY, sunday);
              map.put(TAG_TYPE, type);
              map.put(TAG_LAT, lat);
              map.put(TAG_LNG, lng);
              map.put(TAG_NOCAR, nocar);
  
                  // adding HashList to ArrayList
              contactList.add(map);
          }
      } catch (JSONException e) {
          e.printStackTrace();
      }
  
  
      /**
       * Updating parsed JSON data into ListView
       * */
      ListAdapter adapter = new SimpleAdapter(this, contactList,
              R.layout.list_item,
              new String[] { TAG_NAME, TAG_LAT, TAG_Company }, new int[] {
                      R.id.name, R.id.email, R.id.mobile });
  
      setListAdapter(adapter);
  
      // selecting single ListView item
      ListView lv = getListView();
  
      // Launching new screen on Selecting Single ListItem
      lv.setOnItemClickListener(new OnItemClickListener() {
  
          @Override
          public void onItemClick(AdapterView&lt;?&gt; parent, View view,
                  int position, long id) {
              // getting values from selected ListItem
              String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
              String cost = ((TextView) view.findViewById(R.id.email)).getText().toString();
              String description = ((TextView) view.findViewById(R.id.mobile)).getText().toString();
  
              // Starting new intent
              Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
              in.putExtra(TAG_NAME, name);
              in.putExtra(TAG_Location, cost);
              in.putExtra(TAG_Company, description);
              startActivity(in);
  
          }
      });
  } }
  </code></pre>
  
  <p><strong>Error in Log Cat</strong></p>
  
  <pre><code>     02-06 10:06:19.025: D/AbsListView(9115): Get MotionRecognitionManager 02-06 10:06:19.705: D/dalvikvm(9115): GC_CONCURRENT freed 206K, 6% free 12315K/12999K, paused 13ms+14ms, total 40ms 02-06 10:06:19.725: E/JSON Parser(9115): Error parsing data org.json.JSONException: Value [{"nocar":"0","company_id":"41","postal":"5700","thursday":"","monday":"","lng":"10.5927246809006","type":"2","city":"Svendborg","location_id":"823","distance":"0.00023254303859579","wednesday":"","address":"Aldersro \/ Aldersro 8","sunday":"","name":"Miljøstation","saturday":"","friday":"","tuesday":"","place":"","lat":"55.061426149085"},
  02-06 10:06:19.730: D/AndroidRuntime(9115): Shutting down VM
  02-06 10:06:19.730: W/dalvikvm(9115): threadid=1: thread exiting with uncaught exception (group=0x4100f2a0)
  02-06 10:06:19.740: E/AndroidRuntime(9115): FATAL EXCEPTION: main
  02-06 10:06:19.740: E/AndroidRuntime(9115): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.jsonparsing/com.androidhive.jsonparsing.AndroidJSONParsingActivity}: java.lang.NullPointerException
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.ActivityThread.access$600(ActivityThread.java:140)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.os.Handler.dispatchMessage(Handler.java:99)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.os.Looper.loop(Looper.java:137)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.ActivityThread.main(ActivityThread.java:4898)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at java.lang.reflect.Method.invokeNative(Native Method)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at java.lang.reflect.Method.invoke(Method.java:511)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at dalvik.system.NativeStart.main(Native Method)
  02-06 10:06:19.740: E/AndroidRuntime(9115): Caused by: java.lang.NullPointerException
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at com.androidhive.jsonparsing.AndroidJSONParsingActivity.onCreate(AndroidJSONParsingActivity.java:69)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.Activity.performCreate(Activity.java:5206)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
  02-06 10:06:19.740: E/AndroidRuntime(9115):     ... 11 more
  </code></pre>