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android - System.err : org. json.JSONException: 值

转载 作者：行者123 更新时间：2023-11-29 17:13:12 25 4
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我正在开发 Web 服务应用程序，我正在使用 rest api，我想用 json 对其进行测试。

当我运行我的应用程序时出现此错误:

D/REQUEST Result: result = {"result":[{"id":"1","name":"achref","mat":"achref","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg"},{"id":"2","name":"achref","mat":"achref","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg"},{"id":"3","name":"achref","mat":"achref","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg"},{"id":"4","name":"achref","mat":"achref","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg"},{"id":"5","name":"achref","mat":"achref","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg"}]} W/System.err: org.json.JSONException: Value {"result":[{"id":"1","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg","mat":"achref","name":"achref"},{"id":"2","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg","mat":"achref","name":"achref"},{"id":"3","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg","mat":"achref","name":"achref"},{"id":"4","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg","mat":"achref","name":"achref"},{"id":"5","duration":"achref","imageRes":"http://127.0.0.1/asd.jpg","mat":"achref","name":"achref"}]} of type org.json.JSONObject cannot be converted to JSONArray W/System.err: at org.json.JSON.typeMismatch(JSON.java:111) W/System.err: at org.json.JSONArray.(JSONArray.java:96) W/System.err: at org.json.JSONArray.(JSONArray.java:108) W/System.err: at com.example.wiola.prisonapp.fragments.PrisonnerListFragment.getPrisonersFromJson(PrisonnerListFragment.java:166) W/System.err: at com.example.wiola.prisonapp.fragments.PrisonnerListFragment$AsyncGetPrisoners.doInBackground(PrisonnerListFragment.java:103) W/System.err: at com.example.wiola.prisonapp.fragments.PrisonnerListFragment$AsyncGetPrisoners.doInBackground(PrisonnerListFragment.java:87) W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:288) W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237) W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) W/System.err: at java.lang.Thread.run(Thread.java:841)

and php file

>  <?php define('HOST','localhost'); define('USER','root');
> define('PASS',''); define('DB','achrefDB');   $con =
> mysqli_connect(HOST,USER,PASS,DB);   $sql = "select * from Prisonner";
> $res = mysqli_query($con,$sql);   $result = array();   while($row =
> mysqli_fetch_array($res)){ array_push($result, array('id'=>$row[0],
> 'name'=>$row[1], 'mat'=>$row[2], 'duration'=>$row[3],
> 'imageRes'=>$row[4]   
> 
> )); }   echo json_encode(array("result"=>$result));  
> mysqli_close($con);   ?>

可以帮我吗？谢谢 :)

这个java文件

public class PrisonnerListFragment extends Fragment {

    ListView lvprisonners;
    private PrisonnerAdapter adapter;
    private ArrayList<Prisonner> prisoners;
    private ProgressDialog dialog;

    public PrisonnerListFragment() {
        // Required empty public constructor
    }


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_prisonner_list, container, false);
        lvprisonners = (ListView) view.findViewById(R.id.lv_prisonners);

        new AsyncGetPrisoners().execute();


        return view;
    }

    class AsyncGetPrisoners extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            prisoners = new ArrayList<>();
            dialog = new ProgressDialog(getActivity());
            dialog.setTitle("In Progress");
            dialog.setMessage("En cours du traitement");
            dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
            dialog.show();
        }

        @Override
        protected Void doInBackground(Void... params) {
            String jsonStream = request("http://192.168.0.100/connexion.php").toString();
            getPrisonersFromJson(prisoners, jsonStream);

            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);


            PrisonnerAdapter adapter = new PrisonnerAdapter(getActivity(), R.layout.item_prisonner, prisoners);

            lvprisonners.setAdapter(adapter);

            lvprisonners.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                    getFragmentManager()
                            .beginTransaction()
                            .replace(R.id.container,
                                    PrisonnerDetailFragment.newInstance(prisoners.get(position)))
                            .addToBackStack(null).commit();
                }
            });


            dialog.dismiss();
        }

    }

    public StringBuffer request(String urlString) {

        StringBuffer result = new StringBuffer("");
        try {
            URL url = new URL(urlString);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestProperty("root", "");
            connection.setRequestMethod("GET");
            connection.setDoInput(true);
            connection.connect();
            InputStream inputStream = connection.getInputStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream));

            String line = "";
            while ((line = rd.readLine()) != null) {
                result.append(line);
            }

        } catch (IOException e) {
            e.printStackTrace();
            Log.e("REQUEST Result", "IOException = " + e.getMessage());
        }
        Log.d("REQUEST Result", "result = " + result);
        return result;

    }

    public void getPrisonersFromJson(List<Prisonner> prisoners,String json) {

        try {
            JSONArray array = new JSONArray(json);
            for (int i = 0; i < array.length(); i++) {
                JSONObject jsonObject = array.getJSONObject(i);

                Prisonner p;
                p = new Prisonner();

                p.setId(jsonObject.optInt("id"));
                p.setName(jsonObject.optString("name"));
                p.setMat(jsonObject.optString("mat"));
                p.setDuration(jsonObject.optString("duration"));
                p.setImageRes(jsonObject.optInt("imageRes"));


                prisoners.add(p);

            }
        } catch (JSONException e) {
            e.printStackTrace();

        }

    }

}

和这个 json

{"result":[{"id":"1","name":"achref","mat":"achref","duration":"achref","imageRes":"http:\/\/127.0.0.1\/asd.jpg"},{"id":"2","name":"achref","mat":"achref","duration":"achref","imageRes":"http:\/\/127.0.0.1\/asd.jpg"},{"id":"3","name":"achref","mat":"achref","duration":"achref","imageRes":"http:\/\/127.0.0.1\/asd.jpg"},{"id":"4","name":"achref","mat":"achref","duration":"achref","imageRes":"http:\/\/127.0.0.1\/asd.jpg"},{"id":"5","name":"achref","mat":"achref","duration":"achref","imageRes":"http:\/\/127.0.0.1\/asd.jpg"}]}

囚犯适配器

public class PrisonnerAdapter extends ArrayAdapter<Prisonner> {

    Context context;
    int resource;
    public PrisonnerAdapter(Context context, int resource, List<Prisonner> prisonners) {
        super(context, resource, prisonners);
        this.context=context;
        this.resource=resource;
    }

    @NonNull
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View view = convertView;
        PrisonnerHolder holder = new PrisonnerHolder();

        if (view==null){

        LayoutInflater inflater= (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
        view =inflater.inflate(resource, parent, false);



            holder.TvName = (TextView) view.findViewById(R.id.tv_prisonner_name);
            holder.TvMat = (TextView) view.findViewById(R.id.tv_prisonner_mat);
            holder.TvDuration = (TextView) view.findViewById(R.id.tv_prisonner_duration);
            //holder.ImgPrisonner = (ImageView) view.findViewById(R.id.img_prisonner);
            Picasso.with(context).load(getItem(position).getImageRes()).into(holder.ImgPrisonner);
            view.setTag(holder);
        }
        else{
          holder = (PrisonnerHolder) view.getTag();
        }


        holder.TvName.setText(getItem(position).getName());
        holder.TvMat.setText(getItem(position).getMat());
        holder.TvDuration.setText(getItem(position).getDuration());
        holder.ImgPrisonner.setBackgroundResource(getItem(position).getImageRes());

        return view;
    }

    class PrisonnerHolder {
        TextView TvName;
        TextView TvMat;
        TextView TvDuration;
        ImageView ImgPrisonner;

    }
}

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