Android UnknownHostException当使用HttpGet

我已经开发了一个android应用程序，请求一个httpget，然后它转换为字符串，并把它放在一个textview，但我得到是一个恼人的错误在模拟器和我的android设备上，在这里它是：Android UnknownHostException当使用HttpGet

01-26 05:08:25.346: D/AndroidRuntime(523): Shutting down VM 
01-26 05:08:25.346: W/dalvikvm(523): threadid=1: thread exiting with uncaught exception (group=0x40015560) 
01-26 05:08:25.366: E/AndroidRuntime(523): FATAL EXCEPTION: main 
01-26 05:08:25.366: E/AndroidRuntime(523): java.lang.IllegalStateException: Could not execute method of the activity 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.view.View$1.onClick(View.java:2144) 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.view.View.performClick(View.java:2485) 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.view.View$PerformClick.run(View.java:9080) 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.os.Handler.handleCallback(Handler.java:587) 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.os.Handler.dispatchMessage(Handler.java:92) 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.os.Looper.loop(Looper.java:123) 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.app.ActivityThread.main(ActivityThread.java:3683) 
01-26 05:08:25.366: E/AndroidRuntime(523): at java.lang.reflect.Method.invokeNative(Native Method) 
01-26 05:08:25.366: E/AndroidRuntime(523): at java.lang.reflect.Method.invoke(Method.java:507) 
01-26 05:08:25.366: E/AndroidRuntime(523): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
01-26 05:08:25.366: E/AndroidRuntime(523): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
01-26 05:08:25.366: E/AndroidRuntime(523): at dalvik.system.NativeStart.main(Native Method) 
01-26 05:08:25.366: E/AndroidRuntime(523): Caused by: java.lang.reflect.InvocationTargetException 
01-26 05:08:25.366: E/AndroidRuntime(523): at java.lang.reflect.Method.invokeNative(Native Method) 
01-26 05:08:25.366: E/AndroidRuntime(523): at java.lang.reflect.Method.invoke(Method.java:507) 
01-26 05:08:25.366: E/AndroidRuntime(523): at android.view.View$1.onClick(View.java:2139) 
01-26 05:08:25.366: E/AndroidRuntime(523): ... 11 more 
01-26 05:08:25.366: E/AndroidRuntime(523): Caused by: java.net.UnknownHostException: www.conecciones.net 
01-26 05:08:25.366: E/AndroidRuntime(523): at java.net.InetAddress.lookupHostByName(InetAddress.java:506) 
01-26 05:08:25.366: E/AndroidRuntime(523): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:294) 
01-26 05:08:25.366: E/AndroidRuntime(523): at java.net.InetAddress.getAllByName(InetAddress.java:256) 
01-26 05:08:25.366: E/AndroidRuntime(523): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:136) 
01-26 05:08:25.366: E/AndroidRuntime(523): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
01-26 05:08:25.366: E/AndroidRuntime(523): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
01-26 05:08:25.366: E/AndroidRuntime(523): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:359) 
01-26 05:08:25.366: E/AndroidRuntime(523): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
01-26 05:08:25.366: E/AndroidRuntime(523): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
01-26 05:08:25.366: E/AndroidRuntime(523): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
01-26 05:08:25.366: E/AndroidRuntime(523): at sys.temperature.ConvertActivity.executeHttpGet(ConvertActivity.java:82) 
01-26 05:08:25.366: E/AndroidRuntime(523): at sys.temperature.ConvertActivity.myClickHandler(ConvertActivity.java:70) 
01-26 05:08:25.366: E/AndroidRuntime(523): ... 14 more 
01-26 05:08:29.187: I/Process(523): Sending signal. PID: 523 SIG: 9

这里是我的代码：

public void executeHttpGet(String cis) throws Exception { 
    BufferedReader in = null; 
    try { 
     HttpClient client = new DefaultHttpClient(); 
     Toast.makeText(this, "http://www.**************.net/******/test.php?ci=" + cis, 2).show();    
     HttpGet request = new HttpGet(http://www.**************.net/******/test.php?ci=" + cis); 
     //request.setURI(new URI("http://w3mentor.com/")); 
     HttpResponse response = client.execute(request); 
     in = new BufferedReader 
     (new InputStreamReader(response.getEntity().getContent())); 
     StringBuffer sb = new StringBuffer(""); 
     String line = ""; 
     String NL = System.getProperty("line.separator"); 
     while ((line = in.readLine()) != null) { 
      sb.append(line + NL); 
     } 
     in.close(); 
     String page = sb.toString(); 
     System.out.println(page); 
     } finally { 
     if (in != null) { 
      try { 
       in.close(); 
       } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
    }

什么即时做错了什么？谢谢你，祝你有美好的一天！

来源

2012-01-26 Enrique Benitez

不要忘了在AndroidManifest.xml文件中添加Internet权限。

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

来源

2012-01-26 05:46:13 Arslan

它像一个魅力工作！非常感谢！ –

请不要忘记将我的答案标记为已接受。如果它适合你。谢谢 – Arslan

UnknowHosts错误发生在您的应用无法访问URL中配置的主机的情况下。

步骤，以确保有：

1) INTERNET permission enabled in manifest file 
2) Are you able to access the same url from phone browser 
3) The ports (if any) are open on the server 
4) If you are using host name, try with IP address.

其中一个步骤应该可以帮助您解决这个问题。

来源

2012-01-26 05:59:16 kosa

Android UnknownHostException当使用HttpGet

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