创建UDP服务器时出现致命错误 [英] Fatal error while creating UDP Server

问题描述

大家好，



我正在使用此代码，但它提供了我无法追踪的错误。任何帮助都会受到赞赏。这是代码：

  package  com.example.test ; 
 
  import  java.net.DatagramPacket; 
  import  java.net.DatagramSocket; 
 
  import  android.app.Activity; 
  import  android.os.Bundle; 
  import  android.util.Log; 
  import  android.view.Menu; 
  import  android.widget.TextView; 
 
 
 
  public   class  MainActivity  extends 活动{
 
 TextView显示; 
 
  private  MyDatagramReceiver myDatagramReceiver = null; 
 
 
 受保护  void  onResume（）{
 myDatagramReceiver =  new  MyDatagramReceiver（）; 
 
 myDatagramReceiver.start（）; 
 
} 
 
 
 受保护  void  onPause（）{
  //   myDatagramReceiver.kill（）;  
} 
  @覆盖 
 受保护  void  onCreate（Bundle savedInstanceState）{
  super  .onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
 display =（TextView）findViewById（R.id.textView1）; 
 
} 
 
  @ Override  
  public   boolean  onCreateOptionsMenu（菜单菜单）{
  //  膨胀菜单;如果项目存在，则会将项目添加到操作栏。 
 getMenuInflater（）。inflate（R.menu.main，menu）; 
 
 
  return  true; 
} 
 
  private   class  MyDatagramReceiver  extends 线程{
  private   boolean  bKeepRunning = true; 
  private   String  lastMessage =  ; 
 
  public   void  run（）{
  String 消息; 
  byte  [] lmessage =  new   byte  [ 100 ]; 
 
 
 尝试 {
 DatagramSocket socket =  new  DatagramSocket（ 2690 ）; 
 Log.v（ 运行，   Socket Created）; 
  while （bKeepRunning）{
 DatagramPacket packet =  new  DatagramPacket（lmessage，lmessage） 。长度）; 
 socket.receive（packet）; 
 message =  new   String （lmessage， 0 ，packet.getLength（））; 
 lastMessage = message; 
 runOnUiThread（updateTextMessage）; 
 Log.v（ 接收，   packet recvd）; 
} 
 
  if （socket！= null）{
 socket.close（）; 
 Log.v（  SOC，  套接字关闭）; 
} 
}  catch （Throwable e）{
 e.printStackTrace（）; 
} 
 
 
} 
 
  public   void  kill（）{
 bKeepRunning = false; 
} 
 
  public   String  getLastMessage（）{
  return  lastMessage; 
} 
} 
 
  private  Runnable updateTextMessage =  new  Runnable（）{
  public   void  run（）{
  if （myDatagramReceiver == null） return ; 
 display.setText（myDatagramReceiver.getLastMessage（））; 
} 
}; 
 
} 

以下是错误：

 11-14 03：04：06.240：E / AndroidRuntime（881）：致命异常：主
 11-14 03：04：06.240：E / AndroidRuntime（881） ：进程：com.example.test，PID：881 
 11-14 03：04：06.240：E / AndroidRuntime（881）：java.lang.RuntimeException：无法恢复活动{com.example.test / com .example.test.MainActivity}：android.util.SuperNotCalledException：Activity {com.example.test / com.example.test.MainActivity}没有调用super.onResume（）
 11-14 03:04 ：06.240：E / AndroidRuntime（881）：java.lang.RuntimeException：无法恢复活动{com.example.test / com.example.test.MainActivity}：android.util.SuperNotCalledException：Activity {com.example.test / com.example.test.MainActivity}没有调用super.onResume（）
 11-14 03：04：06.240：E / AndroidRuntime（881）：引起：android.util.SuperNotCalledException：Activity {com .example.test / com.example.test.MainActivity}没有打电话给super.onResume（）

谢谢

解决方案

错误消息

没有打电话给super.onResume（）

告诉你究竟出了什么问题。另请参见 http://developer.android.com/training/basics/activity-lifecycle/pausing。 html [ ^ ]

Hi all,

I am using this code but it gives errors i am unable to trace.Any help would be appreciated.Here is the code:

package com.example.test;

import java.net.DatagramPacket;
import java.net.DatagramSocket;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;



public class MainActivity extends Activity {
	
	TextView display;

	private MyDatagramReceiver myDatagramReceiver = null;
	
	
	protected void onResume() {
	    myDatagramReceiver = new MyDatagramReceiver();
	 
	   myDatagramReceiver.start();
	  
	}
	

	protected void onPause() {
	  //  myDatagramReceiver.kill();
	}
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		display=(TextView) findViewById(R.id.textView1);
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		
		
		return true;
	}

	private class MyDatagramReceiver extends Thread {
	    private boolean bKeepRunning = true;
	    private String lastMessage = "";

	    public void run() {
	        String message;
	        byte[] lmessage = new byte[100];
	        

	        try {
	            DatagramSocket socket = new DatagramSocket(2690);
	            Log.v("Run", "Socket Created");
	            while(bKeepRunning) {
	            	DatagramPacket packet = new DatagramPacket(lmessage, lmessage.length);
	                socket.receive(packet);
	                message = new String(lmessage, 0, packet.getLength());
	                lastMessage = message;
	                runOnUiThread(updateTextMessage);
	                Log.v("Receiving", "packet recvd");
	            }
	            
	            if (socket != null) {
	 	           socket.close();
	 	          Log.v("SOC", "Socket closed");
	 	       }
	        } catch (Throwable e) {
	            e.printStackTrace();
	        }

	       
	    }

	    public void kill() { 
	        bKeepRunning = false;
	    }

	    public String getLastMessage() {
	        return lastMessage;
	    }
	}

	private Runnable updateTextMessage = new Runnable() {
	    public void run() {
	        if (myDatagramReceiver == null) return;
	        display.setText(myDatagramReceiver.getLastMessage());
	    }
	};
	
}

Following are the errors:

11-14 03:04:06.240: E/AndroidRuntime(881): FATAL EXCEPTION: main
11-14 03:04:06.240: E/AndroidRuntime(881): Process: com.example.test, PID: 881
11-14 03:04:06.240: E/AndroidRuntime(881): java.lang.RuntimeException: Unable to resume activity {com.example.test/com.example.test.MainActivity}: android.util.SuperNotCalledException: Activity {com.example.test/com.example.test.MainActivity} did not call through to super.onResume()
11-14 03:04:06.240: E/AndroidRuntime(881): java.lang.RuntimeException: Unable to resume activity {com.example.test/com.example.test.MainActivity}: android.util.SuperNotCalledException: Activity {com.example.test/com.example.test.MainActivity} did not call through to super.onResume()
11-14 03:04:06.240: E/AndroidRuntime(881): Caused by: android.util.SuperNotCalledException: Activity {com.example.test/com.example.test.MainActivity} did not call through to super.onResume()

Thanks

解决方案

The error message

did not call through to super.onResume()

tells you exactly what is wrong. See also http://developer.android.com/training/basics/activity-lifecycle/pausing.html[^].

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