The Code Below Is Used To Populate Listview With Suppliers Name. On Execution I Get Error

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    AsyncHttpClient usercheck=new AsyncHttpClient();
    usercheck.get("http://WebServices.SuppliersMax.com/SuppliersMax.svc/PopulateSuppliersList", new AsyncHttpResponseHandler(){
        public void onSuccess(String response){
            try {
                JSONObject obj3 = new JSONObject(response);
                
                JSONArray jsonArray3 = obj3.getJSONArray("PopulateSuppliersList");
                name=obj3.getJSONArray("PopulateSuppliersList");
                int length3 = jsonArray3.length();
                if(iActivationID!=0)
                {
                    List<string> listContents3 = new ArrayList<string>(length3);
                    for (int i = 0; i < length3; i++)
                    {
                        JSONObject user3 = jsonArray3.getJSONObject(i);
                        if(user3.getInt("ID")>=6)
                        listContents3.add(user3.getString("SUPPLIER_NAME"));
                        //  nm=name.getJSONObject(i);
                    }
                    
                    key = (ListView) findViewById(R.id.listView1);
                    key.setAdapter(new ArrayAdapter<string>(MainActivity.this, android.R.layout.simple_list_item_1, listContents3));
                
                }    
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        key.setOnItemClickListener(new OnItemClickListener() {
        
            @Override
            public void onItemClick(AdapterView, int position, long id) {
                // TODO Auto-generated method stub
                try{
                    String iActivationID=name.getJSONObject(position).getString("ID");
                    RequestParams params = new RequestParams();
                    
                    
                    
                    params.put("iActivationID",iActivationID);
                    //postMyShoppingPreferenceItem(params);
                }catch(JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

    });