android – AppCompatActivity中的setListAdapter

概述我有程序功能listArray扩展AppCompatActivity但我的代码有错误 我的代码 NewsActivity public class NewsActivity extends AppCompatActivity {Toolbar toolbar;// Progress Dialogprivate ProgressDialog pDialog;// Creating JSO 我有程序功能ListArray扩展AppCompatActivity但我的代码有错误

我的代码

NewsActivity

public class NewsActivity extends AppCompatActivity {Toolbar toolbar;// Progress Dialogprivate ProgressDialog pDialog;// Creating JsON Parser objectJsONParser jParser = new JsONParser();ArrayList<HashMap<String,String>> productsList;// url to get all products Listprivate static String url_all_products = "http://localhost/update.PHP";// JsON Node namesprivate static final String TAG_SUCCESS = "success";private static final String TAG_PRODUCTS = "updatedzc";private static final String TAG_PID = "pID";private static final String TAG_name = "name";private static final String TAG_VERSION = "version";private static final String TAG_DESC = "description";// products JsONArrayJsONArray products = null;@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_news);    // Hashmap for ListVIEw    productsList = new ArrayList<HashMap<String,String>>();    // Loading products in Background Thread    new LoadAllProducts().execute();}// Response from Edit Product Activity@OverrIDepublic 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);    }}/** * Background Async Task to Load all product by making http Request * */class LoadAllProducts extends AsyncTask<String,String,String> {    /**     * Before starting background thread Show Progress Dialog     * */    @OverrIDe    protected voID onPreExecute() {        super.onPreExecute();        pDialog = new ProgressDialog(NewsActivity.this);        pDialog.setMessage("Loading News. Please wait...");        pDialog.setIndeterminate(false);        pDialog.setCancelable(false);        pDialog.show();    }    /**     * getting All products from url     * */    protected String doInBackground(String... args) {        // Building Parameters        List<nameValuePair> params = new ArrayList<nameValuePair>();        // getting JsON string from URL        JsONObject Json = jParser.makehttpRequest(url_all_products,"GET",params);        // Check your log cat for JsON reponse        Log.d("All Products: ",Json.toString());        try {            // Checking for SUCCESS TAG            int success = Json.getInt(TAG_SUCCESS);            if (success == 1) {                // products found                // Getting Array of Products                products = Json.getJsONArray(TAG_PRODUCTS);                // looPing through All Products                for (int i = 0; i < products.length(); i++) {                    JsONObject c = products.getJsONObject(i);                    // Storing each Json item in variable                    String ID = c.getString(TAG_PID);                    String name = c.getString(TAG_name);                    String version = c.getString(TAG_VERSION);                    String description = c.getString(TAG_DESC);                    // creating new HashMap                    HashMap<String,String> map = new HashMap<String,String>();                    // adding each child node to HashMap key => value                    map.put(TAG_PID,ID);                    map.put(TAG_name,name);                    map.put(TAG_VERSION,version);                    map.put(TAG_DESC,description);                    // adding HashList to ArrayList                    productsList.add(map);                }            } else {                Toast.makeText(getApplicationContext(),"doesn't have news Now",Toast.LENGTH_SHORT).show();            }        } catch (JsONException e) {            e.printstacktrace();        }        return null;    }    /**     * After completing background task dismiss the progress dialog     * **/    protected voID onPostExecute(String file_url) {        // dismiss the dialog after getting all products        pDialog.dismiss();        // updating UI from Background Thread        runOnUiThread(new Runnable() {            public voID run() {                /**                 * Updating parsed JsON data into ListVIEw                 * */                listadapter adapter = new SimpleAdapter(                        NewsActivity.this,productsList,R.layout.List_item,new String[] { TAG_PID,TAG_name,TAG_VERSION,TAG_DESC},new int[] { R.ID.pID,R.ID.name,R.ID.timestamp,R.ID.txtStatusMsg });                // updating ListvIEw                setlistadapter(adapter);            }        });    }}}

得到错误

setlistadapter(adapter);

像这样的错误

Error:(182,21) error: cannot find symbol method setlistadapter(listadapter)

有人可以帮帮我吗？

解决方法 如果您的活动中包含以下ListVIEw

<ListVIEw androID:ID="@+ID/mainListVIEw"    androID:layout_height="fill_parent"    androID:layout_wIDth="fill_parent"    androID:layout_below="@ID/scan_content"/>

添加类似的东西

public ListVIEw mainListVIEw;

到NewsActivity和替换

setlistadapter(adapter);

同

mainListVIEw = (ListVIEw) findVIEwByID(R.ID.mainListVIEw);  mainListVIEw.setAdapter(adapter);

除非我误解了这个问题,否则这应该有效.

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