Android HttpGet请求不发送

Question

我试图发送一个HTTP请求到http://www.google.com/，并且想要保存我的android应用程序中的所有响应。我尝试了很多方法，但每次出现错误或logcat错误或我的模拟器停止。

你能指出我的代码有什么问题，给我一些配置提示吗？我希望能够同时使用GET和POST。

public void executeHttpGet() throws Exception { 
    BufferedReader in = null; 
     try { 
      HttpClient client = new DefaultHttpClient(); 
      HttpGet request = new HttpGet(); 
      request.setURI(new URI("http://www.google.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); 
      } 
      result.setText(sb.toString()); 

      in.close(); 
      String page = sb.toString(); 
      System.out.println(page); 
      Debug.out(sb.toString()); 

      } finally { 
      if (in != null) { 
       try { 
        in.close(); 
        } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } 
     } 
    } 

---

的logcat：

04-09 20:56:07.730: E/AndroidRuntime(9128): FATAL EXCEPTION: main 
04-09 20:56:07.730: E/AndroidRuntime(9128): java.lang.RuntimeException: Unable to start activity ComponentInfo{mainpackage.rest_client/mainpackage.rest_client.GetResponse}: android.os.NetworkOnMainThreadException 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.os.Looper.loop(Looper.java:137) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.ActivityThread.main(ActivityThread.java:5041) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at java.lang.reflect.Method.invoke(Method.java:511) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at dalvik.system.NativeStart.main(Native Method) 
04-09 20:56:07.730: E/AndroidRuntime(9128): Caused by: android.os.NetworkOnMainThreadException 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at java.net.InetAddress.getAllByName(InetAddress.java:214) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at mainpackage.rest_client.GetResponse.QueryGooglePlus(GetResponse.java:75) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at mainpackage.rest_client.GetResponse.onCreate(GetResponse.java:61) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.Activity.performCreate(Activity.java:5104) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
04-09 20:56:07.730: E/AndroidRuntime(9128):  ... 11 more 
04-09 20:56:08.330: D/dalvikvm(9128): GC_CONCURRENT freed 204K, 11% free 2889K/3216K, paused 6ms+44ms, total 417ms 
04-09 20:56:11.640: I/Process(9128): Sending signal. PID: 9128 SIG: 9 

Answer 1

请检查您是否已经接入互联网的模拟器。

如果你没有得到的接入Internet，然后尝试以下解决方案，它为我工作:)

Issue in accessing internet through android applications.

Answer 2

你有NetworkOnMainThreadException。做一个AsyncTask联网。

Answer 3

我觉得文档描述不够丰富，了解例外NetworkOnMainThreadException

当应用程序试图在其主线程执行 联网运行时所引发的异常。

这仅适用于针对Honeycomb SDK或 的应用程序。针对早期SDK版本的应用程序允许在其主要事件循环线程上执行联网，但不鼓励 。查看文档

试试这个链接，让你知道如何应对网络操作http://developer.android.com/training/articles/perf-anr.html

Answer 4

当U面对像这些琐碎的问题，这对你的学习的exception description通过google搜索总是最好先看看，然后通过查看像these这样的解释和链接来解决问题。它几乎可以将您的开发时间以指数方式缩短。 只是一个诚实的建议，我不是专家:)

而雅，AsyncTask应该做的伎俩。