Question

我解析了json，我可以在画廊中用paseadapter显示我的json'components。我也有setOnItemSelectedListener方法，int这个方法我按位置改变了背景图像，我也有这个方法的线程（1000毫秒）和progressdialog。当我点击我的listview时，我有零点异常.progressdialog是我的问题这是我的来源

public class MainmoviesList extends Fragment {
public final static String TAG = MainmoviesList.class.getSimpleName();
String imageurl = "******";
public static List<ServerItems> arrayOfList;

public static Gallery main_listview;
private AzercellMainPageAdapter objAdapter;

private RelativeLayout mSwitcher;
private CustomerStatistic cs;
private String apisha_url = "*********"; 
public static int mPosition;
private ServerItems objItem;

public static MainmoviesList newInstance() {
    return new MainmoviesList();
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.main_movies_list, container,
            false);
    mSwitcher = (RelativeLayout) rootView.findViewById(R.id.rootNode);
    main_listview = (Gallery) rootView
            .findViewById(R.id.horizontallistview);

    arrayOfList = new ArrayList<ServerItems>();
    cs = new CustomerStatistic();
    cs.execute(apisha_url);


    main_listview.setOnItemSelectedListener(new OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view,
                int position, long id) {
            mPosition = position;
            final ProgressDialog ringProgressDialog = ProgressDialog.show(
                    getActivity(), "Please wait ...",
                    "Downloading Image ...", true);
            ringProgressDialog.setCancelable(true);


                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            loadimagePosition(mPosition);
                            Thread.sleep(1000);
                        } catch (Exception e) {
                        }
                        ringProgressDialog.dismiss();
                    }
                }).start();

        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });
    main_listview.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            mPosition = position;
            MoviewListResult newFragment = new MoviewListResult();
            FragmentTransaction transaction = getFragmentManager()
                    .beginTransaction();
            Bundle bundle = new Bundle();
            bundle.putString("image", arrayOfList.get(position)
                    .getBlurimage());
            bundle.putString("title", arrayOfList.get(position).getTitle());
            bundle.putString("trailer", arrayOfList.get(position)
                    .getYoutube());
            bundle.putString("category", arrayOfList.get(position)
                    .getCategory());
            bundle.putString("writer", arrayOfList.get(position)
                    .getWritten());
            bundle.putString("stars", arrayOfList.get(position).getStars());

            bundle.putString("descraption", arrayOfList.get(position)
                    .getDescraption());
            bundle.putString("time", arrayOfList.get(position).getTime());
            newFragment.setArguments(bundle);
            transaction.replace(R.id.content_frame, newFragment);
            transaction.commit();
        }
    });

    return rootView;
}

private class CustomerStatistic extends AsyncTask<String, Void, String> {
    ProgressDialog pDialog;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(getActivity());
        pDialog.setCancelable(false);
        pDialog.show();
        pDialog.setContentView(R.layout.custom_progressdialog);
    }

    @Override
    protected String doInBackground(String... params) {
        return Utils.getJSONString(params[0]);
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        try {
            JSONArray mainJson = new JSONArray(result);
            for (int i = 0; i < mainJson.length(); i++) {
                JSONObject objJson = mainJson.getJSONObject(i);
                objItem = new ServerItems();
                objItem.setImage(imageurl + objJson.getString("ipone_4"));
                objItem.setTitle(objJson.getString("title"));
                objItem.setYoutube(objJson.getString("youtube"));
                objItem.setWritten(objJson.getString("written"));
                objItem.setCategory(objJson.getString("category"));
                objItem.setDescraption(objJson.getString("descraption"));

                objItem.setStars(objJson.getString("stars"));
                objItem.setBlurimage(imageurl
                        + objJson.getString("ipone_4_blur"));
                JSONObject cinema = objJson.getJSONObject("Cinemas");
                JSONArray cinemasarray = cinema.getJSONArray("Cinemaname");
                for (int j = 0; j < cinemasarray.length(); j++) {
                    JSONObject objJson1 = cinemasarray.getJSONObject(j);
                    JSONArray info = objJson1.getJSONArray("info");
                    for (int k = 0; k < info.length(); k++) {
                        JSONObject information = info.getJSONObject(k);
                        objItem.setTime(information.getString("time"));
                        Log.e("time is", objItem.getTime());
                    }
                }
                arrayOfList.add(objItem);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
        if (pDialog != null) {
            pDialog.dismiss();
            pDialog = null;
        }
        setAdapterToListview();
    }
}

public void setAdapterToListview() {
    objAdapter = new AzercellMainPageAdapter(getActivity(),
            R.layout.azercell_main_page_adapter, arrayOfList);
    main_listview.setAdapter(objAdapter);
}

public void loadimagePosition(int pos) {
    URL url;
    try {
        url = new URL(arrayOfList.get(pos).getBlurimage());
        Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
        Drawable drawable = new BitmapDrawable(bmp);
        mSwitcher.setBackgroundDrawable(drawable);
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

this is a my log cat error

我在做错了什么？如果有人知道解决方案，请帮助我感谢

Answer 1

快速谷歌搜索`android nullpointerexception解决对话框主题``给我这个：

NullPointerException when creating a new Dialog

如果有帮助，请记住也要回答他的答案。

另外你为什么要在你的线程中睡觉？你知道睡觉时没有做任何计算，对吗？

我会为它创建一个AsyncTask，你显然知道如何使用它。然后，您还可以在onPreExecute中显示进度对话框，并在onPostExecute中将其关闭。我认为更清洁。

android progressdialog没有显示在gallery setOnItemSelectedListener方法中

1 个答案: