Question

这是我正在运行的代码，Android已经停止，但是我得到了正确的json，可能是列表视图的问题，我是否必须使用listview id在哪里.. 我的listview id是'list'..

*public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_jobs);
        kywrd = getIntent().getExtras().getString("Keyword");
        loc = getIntent().getExtras().getString("Location");
        farea = getIntent().getExtras().getString("Funcarea");
        exp = getIntent().getExtras().getString("Experience");
        indus = getIntent().getExtras().getString("Industry");
        jobList = new ArrayList<HashMap<String, String>>();

        new postdetails().execute();

        ListView lv = getListView();

        // on seleting single product
        // launching Edit Product Screen
        lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // getting values from selected ListItem
                String pid = ((TextView) view.findViewById(R.id.txttitle)).getText()
                        .toString();

                // Starting new intent
                Intent in = new Intent(getApplicationContext(),
                        ViewJob.class);
                // sending pid to next activity
                in.putExtra (TAG_JOBTITLE,pid);

                // starting new activity and expecting some response back
                startActivityForResult(in, 100);
            }
        });

    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        // if result code 100
        if (resultCode == 100) {
            // if result code 100 is received
            // means user edited/deleted product
            // reload this screen again
            Intent intent = getIntent();
            finish();
            startActivity(intent);
        }

    }





    class postdetails extends AsyncTask<String,String,String>
    {
        String validUser = "false";
        protected void OnPreExecute()   {
            super.onPreExecute();
            pDialog=new ProgressDialog(SearchResult.this);
            pDialog.setMessage("Loading...");
            pDialog.setCancelable(false);
            pDialog.setIndeterminate(false);
            pDialog.show();
        }
        protected String doInBackground(String... args)
        {

            params.add(new BasicNameValuePair("Job_Keyword",kywrd));  
            params.add(new BasicNameValuePair("All_Location",loc));
            params.add(new BasicNameValuePair("Job_Func_Area",farea));
            params.add(new BasicNameValuePair("Job_Max_Exp",exp));
            params.add(new BasicNameValuePair("Job_Industry","indus"));
            JSONObject json = jParser.makeHttpRequest(url,"POST",params);
            Log.d("user : ", json.toString());
            try {  
                int success = json.getInt(TAG_SUCCESS);
                if (success == 1)
                {
                    user = json.getJSONArray(TAG_JOB);
                        validUser = "true";
                        // looping through All Products
                        for (int i = 0; i < user.length(); i++) {
                            JSONObject c = user.getJSONObject(i);

                            // Storing each json item in variable
                            String title = c.getString(TAG_JOBTITLE);
                            String loca = c.getString(TAG_JOBLOC);

                            HashMap<String, String> map = new HashMap<String, String>();                            map.put(TAG_JOBTITLE,title);
                            map.put(TAG_JOBLOC,loca);
                            jobList.add(map);
                        }
                }
                else
                    validUser = "false";
            } catch (JSONException e) {
                e.printStackTrace();
            }
            return validUser;
        }
        protected void onPostExecute(String validUser) {
            pDialog.dismiss();
            if(validUser=="true")
                {      
                            ListAdapter adapter = new SimpleAdapter(
                                    SearchResult.this,jobList,
                                    R.layout.job_list, new String[] {TAG_JOBTITLE,
                                            TAG_JOBTITLE},
                                    new int[] { R.id.txttitle,R.id.txtloc});
                                                setListAdapter(adapter);
                }
                        params.clear();
        }
        }
}***

Answer 1

确保您在listview中将您的ID设置为android:id="@android:id/list"

Answer 2

尝试更改此

ListView lv = getListView();

到

ListView lv = (ListView)findViewById(android.R.id.list);

其中listview的id是“android：id / list”

Listview错误，android停止工作

2 个答案: