Question

我有两个类：MainActivity和ClientListManager。

CLientListManager在接收时将消息发送到MainActivity（通过处理程序），期望更新ListView。但是，情况并非如此。

正确接收消息的内容，但ListView本身没有更新（我尝试使用listView和适配器进行更新但不起作用）。

该应用还有一个ActionBar。当我点击ActionBar的一个特定选项卡时，我们在这里讨论的listView被夸大了。

现在，当我点击该标签时，只有列表视图才会更新。我想在某些方法上更新ListView，如myArrayAdapter.add（）或myListView.add（）（即动态）

仅供参考。，CLM从另一个线程接收消息，并且在接收消息时，CLM的处理程序创建另一个消息（并附加一些数据）并将其发送到mainAcitivty。

我尝试实现一个新的应用程序，我使用非Acitvity Thread通过非活动线程更新listView的内容 - ＆gt; MainActivity线程消息发送机制（我通过发送List发送数据），我能够做到这一点没有错误，但在这里它不会发生。为什么？

MainActivity.java

package com.webServer;



public class MainActivity extends Activity {


Activity mainAct;
ActionBar actionbar;
String log;
Handler mainHandler;
int toast = 1, dialog = 2, IPMessage = 3, clientActionBar = 4, serverActionBar = 5, displayServerListUpdate = 6, updateClientListFromUpdatingThread = 9;
public static String internaldirectoryName;
Boolean clientStatus = false, serverStatus = false;
ListView serverListView, clientListView;
static int mainServerPort;
final ArrayList serverList = new ArrayList();
final ArrayList clientList = new ArrayList();
String remoteServerIPForClient;
String remoteServerPortForClient;
Handler clientListHandler;
ArrayAdapter serverAdapter;

ArrayAdapter clientsAdapter;
int p = 0;

/**
 * Called when the activity is first created.
 * <p/>
 * 1)Sets up the MainHandler extensively used by other threads and classes.
 * <p/>
 * 2) Sets up the actionBar, lists and adapters.
 */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    View clientView = getLayoutInflater().inflate(R.layout.clients, null);

    serverListView = (ListView)findViewById(R.id.s_list);
    clientListView = (ListView)clientView.findViewById(R.id.c_log);


    serverAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, serverList);
    ArrayAdapter clientLogAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, clientList);


    serverListView.setAdapter(clientLogAdapter);
    clientListView.setAdapter(serverAdapter);


    ListView online_list = (ListView) findViewById(R.id.connected_clients);

    serverList.add("one");
    for (int i = 0; i <= 100; i++)
        serverList.add(SystemClock.uptimeMillis());


    Resources res = getResources();
    log = res.getString(R.string.log_text);
    setupActionBar();


    mainHandler = new Handler() {
        @Override
        public void handleMessage(Message m) {

            if (m.getData().getInt("POST") == toast) {
                Toast.makeText(MainActivity.this, m.getData().getString("CONTENT"), Toast.LENGTH_SHORT).show();
            } else if (m.getData().getInt("POST") == dialog) {

                new AlertDialog.Builder(MainActivity.this).setMessage(m.getData().getString("CONTENT")).setNegativeButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                }).show();

            } else if (m.getData().getInt("POST") == IPMessage) {

                serverList.add(m.getData().getString("IPAddress"));

            } else if (m.getData().getInt("POST") == clientActionBar) {

                actionbar.setTitle(m.getData().getString("CONTENT"));
                if (m.getData().getBoolean("CONNECTED"))
                    actionbar.setIcon(R.drawable.tick);
                else if (!(m.getData().getBoolean("CONNECTED")))
                    actionbar.setIcon(R.drawable.red);

            } else if (m.getData().getInt("POST") == displayServerListUpdate) {

                String[] temp = m.getData().getStringArray("COMPLETE CLIENT LIST");
                new AlertDialog.Builder(MainActivity.this).setMessage("Updating display list with " + temp[0]).setNegativeButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                }).show();

                serverList.clear();
                for (int i = 0; i < temp.length; i++)
                    serverList.add(temp[i]);


            } else if (m.getData().getInt("POST") == updateClientListFromUpdatingThread) {
                Toast.makeText(MainActivity.this, "Received is " +m.getData().getStringArrayList("COMPLETEC").toString() , Toast.LENGTH_SHORT).show();

                serverAdapter.addAll(m.getData().getStringArrayList("COMPLETEC"));
                serverAdapter.notifyDataSetChanged();



            }

无法通过非活动线程更新ListView

0 个答案: