无法从远程数据库填充微调器

时间:2012-04-10 19:03:21

标签: android

另一个Android初学者在这里!

好的,我在使用Toast时帮助我检查错误。我收到403禁止错误,我不知道是什么导致它。 url是正确的,因为我的另一个函数从数据库返回数据。

public class FillKeg extends Activity {

    Spinner spinBeerList;
    ArrayList<String> BeerList;
    ArrayAdapter<String> adapter;

    JSONArray jArray;
    String result = null;
    InputStream is = null;
    StringBuilder sb = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fillkeg);
        spinBeerList = (Spinner)findViewById(R.id.spinBeerList);
        BeerList = new ArrayList<String>();
        new getBeerList().execute("http://*****/kegdroid/getBeerList.php");
        adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_spinner_item, BeerList);    
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinBeerList.setAdapter(adapter);
    }

    private class getBeerList extends AsyncTask<String, Void, String> {

        protected String doInBackground(String... urls) {
            //http post
            for (String url : urls) {
                DefaultHttpClient httpclient = new DefaultHttpClient();
                HttpPost httppost = new HttpPost(url);
                try{
                    HttpResponse response = httpclient.execute(httppost);
                    HttpEntity entity = response.getEntity();
                    is = entity.getContent();

                    BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
                    sb = new StringBuilder();
                    sb.append(reader.readLine() + "\n");

                    String line = "0";
                    while ((line = reader.readLine()) != null) {
                            sb.append(line + "\n");
                    }
                    is.close();
                    result = sb.toString();
                }
                catch(Exception e){
                    Log.e("log_tag", "Error in http connection" + e.toString());
                }
            }
            return result;
        }

        protected void onPostExecute(String result){
            try{
                jArray = new JSONArray(result);
                JSONObject json_data = null;
                for(int i = 0; i < jArray.length(); i++){
                    json_data = jArray.getJSONObject(i);
                    BeerList.add(json_data.getString("ContentsName"));
                }    
            }
            catch(JSONException ex){
                ex.printStackTrace();
            } 
            catch (ParseException ex) {
                ex.printStackTrace();
            }
        }

    }
}

2 个答案:

答案 0 :(得分:0)

您正在更新ArrayList支持Adapter而不致电notifyDataSetChanged。尝试将通话adapter.notifyDataSetChanged();添加到onPostExecute的结尾。

或者,您可以拨打adapter.add(json_data.getString("ContentsName"));来代替对BeerList的类似通话,Spinner应自动更新。

答案 1 :(得分:0)

我觉得这很愚蠢,但我的错误源于Apache配置,而不是应用程序代码。最近我的WAMP安装的Apache更新拒绝了对我网络IP的调用的访问。

非常感谢OcuS和Brian Cooley帮助解决我的代码的其他方面!