更新UI Android

Question

在寫這篇文章之前，我看了其他文章，但還沒有找到任何解決方案，我將不勝感激您的幫助。

在應用程序啓動器類的onCreate方法中創建一個線程TCPServer並顯示一個包含信息的表。 問題是，此信息會有所不同，並且必須在線程檢測到TCPServer發送新消息控制時進行更新。

然後我顯示代碼，如果我表達自己。

//launcher class 
public class profesor extends Activity implements OnClickListener { 

    static TableLayout alumnsTable; 

    @Override 
    public void onCreate(Bundle savedInstanceState) {    
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     . 
     . 
     . 

     Thread serverThread = new Thread(null, new TCPServer(), "BackgroundService"); 
     serverThread.start(); 
     . 
     . 
     .  

     //information is added to the table   
     alumnsTable = (TableLayout)findViewById(R.id.alumnsTable); 
     List<Alumnos> listaAlumnos = Alumnos.ReadList(); 
     for(Alumnos al:listaAlumnos){ 
      alumnsTable.addView(filaAlumno(al)); 
     } 
    } 

    //Eliminates the above information and reloads the table with the new information 
    public void actualiza(){ 
     alumnsTable.removeAllViews(); 
     setContentView(R.layout.main); 
     alumnsTable = (TableLayout)findViewById(R.id.alumnsTable);       
     List<Alumnos> listaAlumnos = Alumnos.ReadList();                         
     for(Alumnos al:listaAlumnos){ 
      alumnsTable.addView(filaAlumno(al)); 
     } 
    } 
} 


//TCPServer class 
public class TCPServer implements Runnable { 
    private static Handler handler = new Handler(); 


    public void run() { 

    ServerSocket serverSocket; 

    String file; 
    int filesizeMb = 4; 
    int filesize = filesizeMb * (1024 * 1024); // filesize temporary hardcoded 


    int bytesRead; 
    int current = 0; 
    try { 
     serverSocket = new ServerSocket(profesor.COMUNICATION_PORT); 
     Log.d(profesor.LOG_TAG,"S: Servidor Iniciado."); 

     while (true) { 
      final Socket sock = serverSocket.accept(); 
      String ClientAddr=sock.getInetAddress().toString(); 
      ClientAddr = ClientAddr.substring(ClientAddr.indexOf('/') + 1, ClientAddr.length()); 
      final String contacto=DeviceList.getDeviceName(ClientAddr); 
      Log.d(profesor.LOG_TAG,"S: Conectado con: " + ClientAddr); 

      // Conection type 
      DataInputStream dis = new DataInputStream(sock.getInputStream()); 
      final String connectionType =dis.readUTF(); 
      Log.d(profesor.LOG_TAG,"S: Tipo de Conexion " + connectionType); 

      . 
      . 
      . 
      . 

      // RECEIVING CONTROL MESSAGE 
      if (connectionType.contains("CONTROL")) { 
       String ControlText =dis.readUTF(); 
       String[] Control = ControlText.split(":"); 
       Log.d(profesor.LOG_TAG,"S: Recibido nuevo progreso de prueba. IP: "+Alumnos.getIdAlumno(ClientAddr)+"->"+Integer.parseInt(Control[0])+" ->"+Integer.parseInt(Control[1])); 

       Alumnos.setProgress(Alumnos.getIdAlumno(ClientAddr), Integer.parseInt(Control[0]), Integer.parseInt(Control[1])); 


       /****************************************************/ 
       //Here is where I need to call the update method of the 
       //class teacher to delete the old data and fill the table 
       //again. 
       /****************************************************/ 
      } 
      dis.close(); 
      sock.close(); 
     } 

     } catch (IOException e) { 
      Log.d(profesor.LOG_TAG, "IOException"+e); 
      e.printStackTrace(); 
     } 
    } 
} 

任何人都可以給我一些想法？我見過的例子處理程序，但不是在類的聲明，而在另一個呼叫。

我希望你明白我的意思，我的英語不是很好。

感謝您的幫助

Answer 1

你可以嘗試用一個處理器或活動引用創建TCPSERVER，然後使用它時，你想更新UI：

refHandler.post(new Runnable(){ 
    public void run() { 
     //Update 
    } 
}); 

refActivity.runOnUiThread(new Runnable() { 
    public void run() { 
     //Update 
    } 
}); 

Answer 2

使用runOnUiThread從更新用戶界面主題：

// RECEIVING CONTROL MESSAGE 
      if (connectionType.contains("CONTROL")) { 
       String ControlText =dis.readUTF(); 
       String[] Control = ControlText.split(":"); 
       Log.d(profesor.LOG_TAG,"S: Recibido nuevo progreso de prueba. IP: "+Alumnos.getIdAlumno(ClientAddr)+"->"+Integer.parseInt(Control[0])+" ->"+Integer.parseInt(Control[1])); 

       Alumnos.setProgress(Alumnos.getIdAlumno(ClientAddr), Integer.parseInt(Control[0]), Integer.parseInt(Control[1])); 


       /****************************************************/ 
       //Here is where I need to call the update method of the 
       //class teacher to delete the old data and fill the table 
       //again. 
       /****************************************************/ 
    profesor.this.runOnUiThread(new Runnable() { 
     @Override 
     public void run() { 
      // refresh ui here 
     } 
    }); 
     }