Android HttpGet請求不發送

Question

我試圖發送一個HTTP請求到http://www.google.com/，並且想要保存我的android應用程序中的所有響應。我嘗試了很多方法，但每次出現錯誤或logcat錯誤或我的模擬器停止。

你能指出我的代碼有什麼問題，給我一些配置提示嗎？我希望能夠同時使用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

請檢查您是否已經接入互聯網的模擬器。

如果你沒有得到的接入Internet，然後嘗試以下解決方案，它爲我工作:)

Issue in accessing internet through android applications.

Answer 2

你有NetworkOnMainThreadException。做一個AsyncTask聯網。

Answer 3

我覺得文檔描述不夠豐富，瞭解例外NetworkOnMainThreadException

當應用程序試圖在其主線程執行 聯網運行時所引發的異常。

這僅適用於針對Honeycomb SDK或 的應用程序。針對早期SDK版本的應用程序允許在其主要事件循環線程上執行聯網，但不鼓勵 。查看文檔

試試這個鏈接，讓你知道如何應對網絡操作http://developer.android.com/training/articles/perf-anr.html

Answer 4

當U面對像這些瑣碎的問題，這對你的學習的exception description通過google搜索總是最好先看看，然後通過查看像these這樣的解釋和鏈接來解決問題。它幾乎可以將您的開發時間以指數方式縮短。 只是一個誠實的建議，我不是專家:)

而雅，AsyncTask應該做的伎倆。