متد contain

 public static void read() {
		String result = Webservice.readUrl(
				"http://www.ashoura.info/test/postjson.php?action=read", null);
		if (result != null) {
			try {
				//G.tasks.clear();
				JSONArray tasks = new JSONArray(result);
				for (int i = 0; i < tasks.length(); i++) {
					JSONObject object = tasks.getJSONObject(i);
					StructTask task = new StructTask();
					task.title = object.getString("post_title");
					task.desc = object.getString("post_content");
					
					G.tasks.add(task);
				}
			} catch (JSONException e) {
				e.printStackTrace();
			}
		}
	}




//  activityMain :
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final ListView lstContent = (ListView) findViewById(R.id.lstContent);

        adapter = new AdapterNote(G.tasks);
        lstContent.setAdapter(adapter);


        Commands.read();
        adapter.notifyDataSetChanged();
    }