HttpGetを使用すると、UnknownHostExceptionが発生する

Question

httpgetをリクエストして文字列に変換してテキストビューに入れるアンドロイドアプリケーションを開発していますが、エミュレータとAndroidデバイスの迷惑なエラーですそれは次のとおりです。

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 

そしてここでは私のコードです：

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(); 
      } 
     } 
    } 

間違って何イム？ ありがとう、素敵な一日を！

Answer 1

AndroidManifest.xmlファイルにインターネット権限を追加することを忘れないでください。

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

Answer 2

あなたのアプリがURLで設定されたホストに到達できなかった場合、UnknowHostsエラーが発生します。確実にする

手順は次のとおりです。これらのステップの

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. 

問題の一つの解決のお手伝いをする必要があります。