如何更改列表视图项目？

Question

我从 HttpGet 获取字符串，我想将它们放入列表视图中。我怎么能这样做？我在任何地方都找不到关于它的任何信息。在运动中，我只有一些测试数据。

例如。

“测试1”

但我希望它是动态的，从电话从 HttpGet 获取的字符串。

谢谢。

到目前为止我的代码：（对于代码混乱，我会尽快重写它！）

public class ChatService extends Activity {
    /** Called when the activity is first created. */


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.chatservice);
        try {
            ContactsandIm();
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (URISyntaxException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        CheckLogin();


        ListView list = (ListView) findViewById(R.id.ListView01);
        list.setClickable(true);

        final List<PhoneBook> listOfPhonebook = new ArrayList<PhoneBook>();
        listOfPhonebook.add(new PhoneBook("a", "9981728", "test@test.com"));
        listOfPhonebook
                .add(new PhoneBook("Test1", "1234455", "test1@test.com"));
        listOfPhonebook.add(new PhoneBook("Test2", "00000", "test2@test.com"));

        PhonebookAdapter adapter = new PhonebookAdapter(this, listOfPhonebook);

        list.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> arg0, View view,
                    int position, long index) {
                System.out.println("sadsfsf");
                showToast(listOfPhonebook.get(position).getName());
            }
        });

        list.setAdapter(adapter);
    }

    private void CheckLogin() {
        // TODO Auto-generated method stub
        // Create a new HttpClient and Post Header
                HttpClient httpclient = new DefaultHttpClient();

                /* login.php returns true if username and password is equal to saranga */
                HttpPost httppost = new HttpPost("http://gta5news.com/login.php");

                try {

                    // Execute HTTP Post Request
                    Log.w("HttpPost", "Execute HTTP Post Request");
                    HttpResponse response = httpclient.execute(httppost);

                    String str = inputStreamToString(response.getEntity().getContent())
                            .toString();
                    Log.w("HttpPost", str);

                    if (str.toString().equalsIgnoreCase("true")) {
                        Log.w("HttpPost", "TRUE");
                        try {Thread.sleep(250);
                        } catch (InterruptedException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

                        //put intent here(21/3/12); 

                    } else {
                        Log.w("HttpPost", "FALSE");

                    }

                } catch (ClientProtocolException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            private StringBuilder inputStreamToString(InputStream is) {
                String line = "";
                StringBuilder total = new StringBuilder();
                // Wrap a BufferedReader around the InputStream
                BufferedReader rd = new BufferedReader(new InputStreamReader(is));
                // Read response until the end
                try {
                    while ((line = rd.readLine()) != null) {
                        total.append(line);
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
                // Return full string
                return total;
            }




    private void ContactsandIm() throws URISyntaxException, ClientProtocolException, IOException {
        // TODO Auto-generated method stub
        BufferedReader in = null;
        String data = null;


        HttpClient get = new DefaultHttpClient();
        URI website = new URI("http://www.gta5news.com/test.php");
        HttpGet webget = new HttpGet();
        webget.setURI(website);
        HttpResponse response = get.execute(webget);
        Log.w("HttpPost", "Execute HTTP Post Request");
        in = new BufferedReader (new InputStreamReader(response.getEntity().getContent()));
        //now we'll return the data that the PHP set from the MySQL Database.



        // just some test code, to see if the HttpGet was working.
        if (in.equals("True")); {
            Toast.makeText(this,"yay", Toast.LENGTH_LONG).show();
        }






    }

    // end bracket for "ContactsandIm"

    private void showToast(String message) {
        Toast.makeText(this, message, Toast.LENGTH_LONG).show();
    }
}

Answer 1

从代码中，我看到 PhonebookAdapter 是您的自定义适配器类。为什么不解析 PhoneBook 类型的 http 响应并将其添加到 listOfPhonebook。这应该会在 listView 中显示解析的内容。

Answer 2

据我了解，每次 Http 请求成功时，您都需要添加新的电话簿条目。 如果是这样，您必须选择使一切动态化：

1. 每次收到新数据时重新创建适配器：

   • 使您的 listView 成为全局变量（以使其可从类中的任何函数访问）
   • 对您的列表做同样的事情
   • 收到新数据后 - 将此数据添加到您的列表中，创建新适配器并将此适配器设置为您的 ListView

2. 创建一个可以更新 ListItems 的自定义适配器：

   公共类 YourCustomAdapter 扩展 BaseAdapter { 私人最终 LayoutInflater 充气机； 私有 ArrayList 列表 = 新 ArrayList(); 私人处理程序 uiHandler = 新处理程序（）；

   /*..... default set of functions from BaseAdapter ......*/
   
   public void setList(ArrayList<PhoneBook> list)
   {
       this.list = list;
   }
   
   public void addEntry(final PhoneBook entry)
   {
       uiHandler.post(new Runnable()
       {
           @Override
           public void run() 
           {
               list.add(entry);
               YourCustomAdapter.notifyDataSetChanged();
           }
       });
   }
   

   }
   • 请注意，在这种情况下，您只能从 UI 线程修改基础列表

希望对你有帮助