我如何解决（错误打开跟踪文件：没有这样的文件或目录（2））在Android中 [英] How Can I Solve ( Error Opening Trace File: No Such File Or Directory (2)) In Android

问题描述

伙计们。

当我运行我的应用程序时我在LogCat中遇到异常错误

打开跟踪文件时出错：没有这样的文件或目录（2 ）

即时尝试制作程序连接互联网



i将此标签添加到Manifest文件

清单：

 <   uses-permission     android：name   =  android.permission.INTERNET  /  >  

我的java：

 包 net.learn2develop.http1; 
 
  import  android.os.Bundle; 
  import  android.app.Activity; 
  import  android.view.Menu; 
  import  java.io.IOException; 
  import  java.io.InputStream; 
  import  java.net.HttpURLConnection; 
  import  java.net.URL; 
  import  java.net.URLConnection; 
  import  android.util.Log; 
 
  public   class  MainActivity  extends 活动{
 
  private  InputStream OpenHttpConnection（ String  urlString）< span class =code-keyword> throws  IOException 
 {
 Log.d（  Location：，  Method-first Line）; 
 InputStream in = null; 
  int  response =  -   1 ; 
 URL url =新网址（urlString）; 
  //  网址url =新网址（urlString）;  
 URLConnection conn = url.openConnection（）; 
  if （！（conn  instanceof  HttpURLConnection））
  throw   new  IOException（ 不是Http连接）; 
 尝试 
 {
 Log.d（  Locataion：，  try bloc）; 
 HttpURLConnection httpConn =（HttpURLConnection）conn; 
 httpConn.setAllowUserInteraction（false）; 
 httpConn.setFollowRedirects（true）; 
 httpConn.setRequestMethod（  GET）; 
 httpConn.connect（）; 
 response = httpConn.getResponseCode（）; 
  if （response == HttpURLConnection.HTTP_OK）{
 in = httpConn.getInputStream（）; 
} 
} 
  catch （例外情况）
 {
 Log.d（  Networking，ex.getLocalizedMessage（））; 
  throw   new  IOException（ 连接）时出错; 
} 
 返回 in; 
} 
 
  @覆盖 
 受保护  void  onCreate（Bundle savedInstanceState）{
  super  .onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
} 
 
 
 
} 

任何帮助？

解决方案

每次这段代码都说明一点

 @覆盖
 受保护  void  onCreate（Bundle savedInstanceState）{
 super .onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
} 
 

来自MainActivity类中的所有代码

it遇见也会给你带来一些问题。



试试吧。

hi guys .
when i run my app i get an unusual Error in LogCat
Error opening trace file: No such file or directory (2)
im trying to make a program to connect Internet

i added this tag to Manifest File
manifest :

<uses-permission android:name="android.permission.INTERNET"/>

my java :

package net.learn2develop.http1;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import android.util.Log;

public class MainActivity extends Activity {

	private InputStream OpenHttpConnection(String urlString) throws IOException
	{
		Log.d("Location:","Method-first Line");
		InputStream in=null;
		int response=-1;
		URL url=new URL(urlString);
		//URL url=new URL(urlString);
		URLConnection conn=url.openConnection();
		if(!(conn instanceof HttpURLConnection))
			throw new IOException("Not an Http connection");
		try
		{
			Log.d("Locataion:","try bloc");
			HttpURLConnection httpConn=(HttpURLConnection) conn;
			httpConn.setAllowUserInteraction(false);
			httpConn.setFollowRedirects(true);
			httpConn.setRequestMethod("GET");
			httpConn.connect();
			response=httpConn.getResponseCode();
			if(response==HttpURLConnection.HTTP_OK){
				in=httpConn.getInputStream();
			}
		}
		catch(Exception ex)
		{
			Log.d("Networking",ex.getLocalizedMessage());
			throw new IOException("Error connecting");
		}	
		return in;
			}
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	

}

any help ?

解决方案

Make a point the every time this code

@Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
   }

Comes before all your code in the MainActivity class
it met also cause you some problems.

Try it.

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