Java 通过RESTAPI检索结果，并在新活动的列表视图中显示它（列表视图出现小问题）

我正在通过RESTAPI从工作站点检索数据。我能够检索数据，甚至可以显示在同一页后搜索按钮。但是，我想在新活动中显示列表视图。我用意图来做这件事。但不幸的是，我无法证明这一点。一旦我点击我的应用程序，它就会崩溃并且什么也不输出

MAIN ACTIVITY.java 公共类MainActivity扩展了活动{

    //private String url1 = "http://api.openweathermap.org/data/2.5/weather?q=";
    //private String url2 = "&mode=xml";

    EditText queryText;
    EditText locationText;
    EditText sortText;
    EditText fromAgeText;
    ListView responseView;
    // EditText radiusText;
    ProgressBar progressBar;
    EditText jtText;
    EditText chnlText;
    EditText countryText;
    EditText txText;
    static final String API_KEY = "298**70********4";
    static final String API_URL = "http://api.xyz.com/abc/apisearch?";

    ProgressDialog waitProgress;
    EditText startText;
    EditText limitRes;
    EditText filterText;
    EditText userIpText;   //="122.171.57.131";
    EditText radiusText;
    EditText browserText;
    EditText version;
    EditText stText;
    EditText latlongText;

    //private HandleXML obj;
    String finalUrl;
    ArrayList<Result> rList = null;
    ArrayList<Result> resultlist;
    String tempResponse;
    private PostBaseAdapter adapter;
    ListView list;
    Result result;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //initializeUI("java","bangalore","karnataka","date","25","jobsite","fulltime","0","15","14","1","1","india","null","122.172.176.113","chrome","2");
        initializeUI();
    }
    //responseView = (ListView) findViewById(R.id.responseView);
    private void initializeUI() {
        queryText = (EditText) findViewById(R.id.queryText);
        locationText = (EditText) findViewById(R.id.locationText);
        txText = (EditText) findViewById(R.id.txText);
        sortText = (EditText) findViewById(R.id.sortText);
        radiusText = (EditText) findViewById(R.id.radiusText);
        stText = (EditText) findViewById(R.id.stText);
        jtText = (EditText) findViewById(R.id.jtText);
        //startText = (EditText) findViewById(R.id.startText);
        limitRes = (EditText) findViewById(R.id.limitRes);
        fromAgeText = (EditText) findViewById(R.id.fromAgeText);
        //filterText = (EditText) findViewById(R.id.filterText);
        //latlongText = (EditText) findViewById(R.id.latlongText);
        countryText = (EditText) findViewById(R.id.countryText);
        //chnlText = (EditText) findViewById(R.id.chnlText);
        userIpText = (EditText) findViewById(R.id.userIpText);
        //browserText = (EditText) findViewById(R.id.browserText);
        //version = (EditText) findViewById(R.id.version);
        progressBar = (ProgressBar) findViewById(R.id.progressBar);
        Button queryButton = (Button) findViewById(R.id.queryButton);
        //list = (ListView) findViewById(R.id.resultList);



        queryButton.setOnClickListener(new View.OnClickListener()

        {
            @Override
            public void onClick(View v) {
                String query = queryText.getText().toString();
                String location = locationText.getText().toString();
                String tx = txText.getText().toString();
                String sort = sortText.getText().toString();
                String radius = radiusText.getText().toString();
                String st = stText.getText().toString();
                String jobtype = jtText.getText().toString();

                //String start = startText.getText().toString();
                String limit = limitRes.getText().toString();
                String fromAge = fromAgeText.getText().toString();
                //String filter = filterText.getText().toString();
                //String latlong = latlongText.getText().toString();
                String country = countryText.getText().toString();
                //String chnlTxt = chnlText.getText().toString();
                String userIp = userIpText.getText().toString();
                //String browser = browserText.getText().toString();
                //String versionTx = version.getText().toString();
                //ArrayList<String> arl= new ArrayList<String>();
                //arl.add(query);
                new RetrieveFeedTask().execute(query, location, tx, sort, radius, st, jobtype,"1",limit,fromAge,"1","1",country,"null",userIp, "chrome","2");
                //responseView.setText(url);
                Log.e("ERROR","In button call");
                Log.i("INFO","Inside Button call");
            }
        });

      list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

              @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                // getting values from selected ListItem
                String name = ((TextView) view.findViewById(R.id.tvTitle)).getText().toString();
                // create intent to start another activity
                Intent intent = new Intent(MainActivity.this, DetailsActivity.class);
                //Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(resultlist.get(position).getJobtitle()));
                // add the selected text item to our intent.
                intent.putExtra("title", name);
                startActivity(intent);
            }


        });
    }


    class RetrieveFeedTask extends AsyncTask<String, String, String> {
        private Exception exception;
        String tempResponse = "";


        protected void onPreExecute() {
            waitProgress = ProgressDialog.show(MainActivity.this, "", "Loading... please wait...");
           // progressBar.setVisibility(View.VISIBLE);
           // responseView.setAdapter(null);//.setText(" ");
            Log.e("ERROR","In onPreExecute call");
            Log.i("INFO","Inside onPreExecutecall");
        }


        protected String doInBackground(String... args) {

            // Do some validation here
            String query = args[0];
            String location = args[1];
            String tx = args[2];
            String sort = args[3];
            String radius = args[4];
            String st = args[5];
            String jobtype = args[6];
            String start = args[7];
            String limit = args[8];
            String fromAge = args[9];
            String filter = args[10];
            String latlong = args[11];
            String country = args[12];
            String chnlTxt = args[13];
            String userIp = args[14];
            String browser = args[15];
            String versionTx = args[16];
            finalUrl = API_URL + "publisher=" + API_KEY + "&q=" + query + "&l=" + location + "," + tx + "&sort=" + sort + "&radius=" + radius + "&st=" + st + "&jt=" + jobtype + "&start=" + start + "&limit=" + limit + "&fromage=" + fromAge + "&filter=" + filter + "&latlong=" + latlong + "&co=" + country + "&chnl=" + chnlTxt + "&userip=" + userIp + "&useragent=" + browser + "&v=" + versionTx;
            //finalUrl=  "http://api.xyz.com/ads/apisearch?publisher=2986470692413324&q=java&l=BANGALORE%2C+karnataka&sort=date&radius=25&st=jobsite&jt=fulltime&start=1&limit=10&fromage=14&filter=1&latlong=1&co=india&chnl=null&userip=122.166.158.225&useragent=Chrome&v=2";
            SAXParser();
            return "";
    }
    protected void onPostExecute(String response) {
          /*  if (response == null || response.trim().equals("")) {
                response = "THERE WAS AN ERROR";
            }*/

      /*  if (rList == null) {
            responseView.setAdapter(null);      //setText("Error");
            //return;
        }*/
       // progressBar.setVisibility(View.GONE);
        //Log.i("INFO", response);
        // getting values from selected ListItem
       // Bundle bundle= new Bundle();
        String name = ((TextView) findViewById(R.id.tvTitle)).getText().toString();
        Bundle bundle= new Bundle();
        // create intent to start another activity
        //bundle.putString("name",result.getJobtitle());
        Intent intent2 = new Intent(MainActivity.this, ResultListView.class);
        //Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(resultlist.get(position).getJobtitle()));
        // add the selected text item to our intent.
        //intent2.putExtra("title", name);
        bundle.putString("title",name);
        intent2.putExtra("pBundle",bundle);
        startActivity(intent2);
        //displayData();
        if (waitProgress != null) {
            waitProgress.dismiss();
        }

    }
      /*  protected void onPostExecute()
        {   progressBar.setVisibility(View.GONE);
            displayData();

            }*/


    private void SAXParser(){

        try {

            SAXParserFactory factory = SAXParserFactory.newInstance();
            // create a parser
            //XMLReader xmlreader = factory.getXMLReader();
            SAXParser parser = factory.newSAXParser();
            resultlist = new ArrayList<Result>();
            URL ul = new URL(finalUrl);
            URLConnection uc = ul.openConnection();
            ResultHandler resultHandler = new ResultHandler(resultlist);

            // assign our handler
            // xmlreader.setContentHandler(resultHandler);
            // perform the synchronous parse
            parser.parse(new InputSource(uc.getInputStream()), resultHandler);
            resultlist = resultHandler.getResultList();
            Log.e("ERROR","In SAXParser call");
            Log.i("INFO","Inside SAXParser");
        } catch (Exception e) {
            e.printStackTrace();

        }
        Log.e("ERROR","In doInBackground call");
        Log.i("INFO","Inside doInBackgr call");
        // SAXParser();

    }
    } 

---

我没有显示解析XML数据，因为它工作正常。问题很简单，我使用的是intent，但无法在列表视图中显示它。我询问postExecute（）中的代码；

通过Parcelable接口实现结果。现在从服务器获取数据后，只需将ArrayList放入intent中，然后在ResultActivity中检索它们

在list.setItemClickListener中-

                Intent intent = new Intent(MainActivity.this, DetailsActivity.class);
                intent.putParcelableArrayListExtra("RESULT", resultlist);
                intent.putExtra("title", name);
                startActivity(intent);

同样，在“结果创建”活动中，不要忘记初始化结果列表-

                resultlist = getIntent().getParcelableArrayExtra("RESULT");

---

希望它能帮助您：）

通过Parcelable接口实现结果。现在从服务器获取数据后，只需将ArrayList放入intent，并在ResultActivity中检索它们

在list.setItemClickListener中-

                Intent intent = new Intent(MainActivity.this, DetailsActivity.class);
                intent.putParcelableArrayListExtra("RESULT", resultlist);
                intent.putExtra("title", name);
                startActivity(intent);

同样，在“结果创建”活动中，不要忘记初始化结果列表-

                resultlist = getIntent().getParcelableArrayExtra("RESULT");

---

希望它能帮助您：）

事实上，我询问了onPostExecute（）中与列表视图相关的代码；以及LIST.setOnItemClickListener（）中的代码工作正常..谢谢实际上，我询问了onPostExecute（）中与列表视图相关的代码；以及LIST.setOnItemClickListener（）中的代码工作正常..谢谢

                Intent intent = new Intent(MainActivity.this, DetailsActivity.class);
                intent.putParcelableArrayListExtra("RESULT", resultlist);
                intent.putExtra("title", name);
                startActivity(intent);

                resultlist = getIntent().getParcelableArrayExtra("RESULT");