从扩展活动扩展Run方法扩展Runnable

Question

我试图从一个正在运行的Runnable内部调用一个方法。它等待输入一个字符串，当它依赖于该字符串(字符串充当命令)时，它会调用一个方法，并运行其中的内容。

public class App extends Activity implements Runnable {

    public void run() {

         try {
             ServerSocket serverSocket = new ServerSocket(portNum);
             while (true) {          
                 Socket client = serverSocket.accept();

                 try {

                      BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
                      String str = in.readLine();
                      if(str.equals("test")) {
                          //method call here
                      }

                 } catch(Exception e) {
                        Log.d("App", e.getMessage());

                 } finally {
                            client.close();
                        Log.d("App", "Done.");
                    }
             }       
         } catch (Exception e) {
             Log.d("App", e.getMessage());
         }
    }

Answer 1

您应该创建一个Handler对象。每个Handler实例都与一个线程相关联，并且根据您希望在哪个线程上关联/处理消息，您应该在其上下文中创建Handler。然后您可以将消息推送到创建Handler的线程的Message队列中。当字符串进入时，您可以使用类似以下内容：

public Handler handler_use = new Handler(){

    // @Override
    public void handleMessage(Message msg) {
       //Do something with the message
    }
}

在try块中：

try {
    BufferedReader in = new BufferedReader(new  InputStreamReader(client.getInputStream()));
    String str = in.readLine();
    if(str.equals("test")) {
        //Construct the message Msg - based on the string
        handler_use.sendMessage(Msg);
    }
}