title: Cannot use "this" in a static content in android
body: <p>I am using simple list adapter in my android application</p>
  
  <pre><code>    ListAdapter adapter = new SimpleAdapter(this, jsonParseList , R.layout.list_view, 
                              new String[] {"conv_title","content"}, 
                              new int[] { R.id.conv_title, R.id.content });
  
      listView.setAdapter(adapter);
  </code></pre>
  
  <p>In the above code in the place of <code>this</code> it shows <code>this</code> cannot use in a static content. Why?</p>
  
  <pre><code>public class Json extends Activity {
      static HttpURLConnection urlConnection;
      static ListView listView;
      //ArrayList&lt;String&gt; jsonParseList = new ArrayList&lt;String&gt;();
      Jsonparser jsonparser;
      enter code here
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.json_main);
          listView = (ListView) findViewById(android.R.id.list);
          jsonparser = new Jsonparser();
          jsonparser.execute("");
          Log.e("List Activity", "" + jsonParseList);
      }
  
      public static HttpURLConnection openConnection() throws Exception {
          int responseCode = -1;
          try {
              URL url = new URL(
                      " place ur url");
              urlConnection = (HttpURLConnection) url.openConnection();
              urlConnection.setRequestMethod("POST");
              urlConnection.setRequestProperty("Content-Type",
                      "application/x-www-form-encoded");
              urlConnection
                      .setRequestProperty(
                              "Content-Length",
                              ""
                                      + Integer
                                              .toString("place ur url"
                                                      .getBytes().length));
              urlConnection.setRequestProperty("Content-Language", "en-US");
              urlConnection.setRequestProperty("Accept-Encoding", "identity");
              urlConnection.setUseCaches(false);
              urlConnection.setDoInput(true);
              urlConnection.setDoOutput(true);
              urlConnection.setReadTimeout(10 * 1000);
              urlConnection.setConnectTimeout(10 * 1000);
              DataOutputStream wr = new DataOutputStream(
                      urlConnection.getOutputStream());
              wr.writeBytes("place ur url");
              wr.flush();
              wr.close();
              responseCode = urlConnection.getResponseCode();
              if (responseCode != HttpURLConnection.HTTP_OK) {
                  throw new Exception("Server not responding");
              }
          } catch (SocketException e) {
              throw new Exception("Connection Time Out");
          } catch (java.net.UnknownHostException unknownHostException) {
              // TODO: handle exception
              throw new Exception("unknownHostException");
          } catch (Exception e) {
              // TODO: handle exception
              throw new Exception("Error Occured");
          }
          return urlConnection;
      }
  
      public static ArrayList&lt;String&gt; jsonParseList = new ArrayList&lt;String&gt;();
  
      public static ArrayList&lt;String&gt; jsonParsing() {
          // TODO Auto-generated method stub
          StringBuffer buffer = new StringBuffer();
          JSONArray array;
  
          try {
              try {
                  urlConnection = openConnection();
              } catch (Exception e1) {
                  // TODO Auto-generated catch block
                  e1.printStackTrace();
              }
              BufferedReader bufferedReader = new BufferedReader(
                      new InputStreamReader(urlConnection.getInputStream()));
              String line = bufferedReader.readLine();
              while (line != null) {
                  buffer.append(line);
                  line = bufferedReader.readLine();
              }
              bufferedReader.close();
              if (buffer.toString() != null) {
                  try {
                      array = new JSONArray(buffer.toString());
                      JSONObject jsonObject;
                      for (int i = 0; i &lt; array.length(); i++) {
  
                          jsonObject = array.getJSONObject(i);
                          String conv_title = jsonObject.getString("conv_title");
                          String content = jsonObject.getJSONObject("first_post")
                                  .getString("content");
                          String creator = jsonObject.getJSONObject("first_post")
                                  .getJSONObject("creator").getString("name");
  
                          HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;();
  
                          // adding each child node to HashMap key =&gt; value
  
                          //map.put("id",  String.valueOf(i));
                          map.put("conv_title", jsonObject.getString("conv_title"));
                          map.put("content", jsonObject.getString("content"));
                          map.put(conv_title, conv_title);
                          map.put(content, content);
                          Log.e("List Values", conv_title);
                          Log.e("List Values", content);
  
                          jsonParseList.add("conv_title "+"content");
                      }
                  } catch (JSONException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  }
                  ListAdapter adapter = new SimpleAdapter(this, jsonParseList , R.layout.list_view, 
                              new String[] {"conv_title","content"}, 
                              new int[] { R.id.conv_title, R.id.content });
  
                  listView.setAdapter(adapter);
              }
  
          } catch (IOException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
          return jsonParseList;
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          // Inflate the menu; this adds items to the action bar if it is present.
          getMenuInflater().inflate(R.menu.main, menu);
          return true;
      }
  
      private class Jsonparser extends AsyncTask&lt;String, Void, ArrayList&lt;String&gt;&gt; {
  
          @Override
          protected ArrayList&lt;String&gt; doInBackground(String... params) {
              // TODO Auto-generated method stub
              return jsonUtil.jsonParsing();
  
          }
  
          @Override
          protected void onPostExecute(ArrayList&lt;String&gt; result) {
              // TODO Auto-generated method stub
              super.onPostExecute(result);
              if (result instanceof ArrayList&lt;?&gt;) {
                  jsonParseList = result;
  
              }
          }
      }
  }
  </code></pre>