AndroidでOKHTTPを使用してASP.NET WebApiからGETサービスをリクエストする

Question

私はこの問題を抱えていて、OkHTTpを使用してWebAPiサービスに接続しています。問題は "null"アンドロイド側で結果。ここではAndroidの側のコードです：

public class OkHttpHandlerIncoming extends AsyncTask<String, Void, String> { 

    OkHttpClient client = new OkHttpClient(); 
    String URL = "http://localhost:8306/api/uconnectservice"; 

    String JsonStringObject; 

    public OkHttpHandlerIncoming() { 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    protected String doInBackground(String... params) { 



     Request request = new Request.Builder().url(params[0]).build(); 
     // Request request = new 
     // Request.Builder().url(params[0]).post(formBody).build(); 
     try { 
      Response response = client.newCall(request).execute(); 
      Log.e("Execute Request", request.toString()); 
      if (!response.isSuccessful()) 
       throw new IOException("Unexpected code " + response.toString()); 
      return response.body().string(); 

     } catch (Exception e) { 
     } 

     return null; 
    } 

} 

はと

public void DATAFROMSERVICE(){ 
     StringBuilder outputText = new StringBuilder("Result:"); 

     OkHttpHandlerIncoming client = new OkHttpHandlerIncoming(); 

     String result = null; 
     try { 
      result = client.execute().get(); 
     } catch (InterruptedException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (ExecutionException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     Log.e("From Service", outputText.append(result + "\n").toString()); 

    } 
//////////////////////////////////////// 
Also here is the code from the server side 

    public class UConnectServiceController : ApiController 
    { 
     private IUconnectRepository _UconnectHandler; 

     public UConnectServiceController() 
     { 
      _UconnectHandler = new UconnectRepository(); 
     } 

     public UConnectServiceController(IUconnectRepository repository) 
     { 
      if (_UconnectHandler == null) 
      { 
       throw new ArgumentNullException("repository"); 
      } 
      _UconnectHandler = repository; 
     } 

     /////I am calling this service-> GET api/uconnectservice 
     public List<AcountTypesRegistered> Get() 
     { 
      return _UconnectHandler.GetAll(); 
     } 

コードが続くが...

誰かが間違って何を起こっているの私を導くことができますしてください、次のように私はメインスレッドから呼び出しを行います

：または任意のより良い提案 ところで、ここでthnks

は私のログの猫です

12-13 03:20:54.360: W/System.err(26811): at java.util.concurrent.FutureTask.report(FutureTask.java:93) 
12-13 03:20:54.360: W/System.err(26811): at java.util.concurrent.FutureTask.get(FutureTask.java:163) 
12-13 03:20:54.360: W/System.err(26811): at android.os.AsyncTask.get(AsyncTask.java:483) 
12-13 03:20:54.360: W/System.err(26811): at com.nickSoft.unics_alpha.accountdetails.DATAFROMSERVICE(accountdetails.java:198) 
12-13 03:20:54.360: W/System.err(26811): at com.nickSoft.unics_alpha.accountdetails.onCreate(accountdetails.java:120) 
12-13 03:20:54.360: W/System.err(26811): at android.app.Activity.performCreate(Activity.java:5231) 
12-13 03:20:54.360: W/System.err(26811): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
12-13 03:20:54.360: W/System.err(26811): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2210) 
12-13 03:20:54.360: W/System.err(26811): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2296) 
12-13 03:20:54.360: W/System.err(26811): at android.app.ActivityThread.access$800(ActivityThread.java:145) 
12-13 03:20:54.360: W/System.err(26811): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1243) 
12-13 03:20:54.360: W/System.err(26811): at android.os.Handler.dispatchMessage(Handler.java:102) 
12-13 03:20:54.360: W/System.err(26811): at android.os.Looper.loop(Looper.java:136) 
12-13 03:20:54.360: W/System.err(26811): at android.app.ActivityThread.main(ActivityThread.java:5136) 
12-13 03:20:54.360: W/System.err(26811): at java.lang.reflect.Method.invokeNative(Native Method) 
12-13 03:20:54.360: W/System.err(26811): at java.lang.reflect.Method.invoke(Method.java:515) 
12-13 03:20:54.360: W/System.err(26811): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:819) 
12-13 03:20:54.360: W/System.err(26811): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:635) 
12-13 03:20:54.360: W/System.err(26811): at dalvik.system.NativeStart.main(Native Method) 
12-13 03:20:54.360: W/System.err(26811): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=0; index=0 
12-13 03:20:54.360: W/System.err(26811): at com.nickSoft.Connections.OkHttpHandlerIncoming.doInBackground(OkHttpHandlerIncoming.java:53) 
12-13 03:20:54.360: W/System.err(26811): at com.nickSoft.Connections.OkHttpHandlerIncoming.doInBackground(OkHttpHandlerIncoming.java:1) 
12-13 03:20:54.360: W/System.err(26811): at android.os.AsyncTask$2.call(AsyncTask.java:288) 
12-13 03:20:54.360: W/System.err(26811): at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
12-13 03:20:54.360: W/System.err(26811): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
12-13 03:20:54.360: W/System.err(26811): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
12-13 03:20:54.360: W/System.err(26811): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
12-13 03:20:54.360: W/System.err(26811): at java.lang.Thread.run(Thread.java:841) 
12-13 03:20:54.360: E/From Service(26811): Result:null 
12-13 03:20:54.360: W/dalvikvm(26811): threadid=11: thread exiting with uncaught exception (group=0x415ced88) 
12-13 03:20:54.360: E/test(26811): Exception 
12-13 03:20:54.370: E/AndroidRuntime(26811): FATAL EXCEPTION: AsyncTask #1 
12-13 03:20:54.370: E/AndroidRuntime(26811): Process: com.nickSoft.unics_alpha, PID: 26811 
12-13 03:20:54.370: E/AndroidRuntime(26811): java.lang.RuntimeException: An error occured while executing doInBackground() 
12-13 03:20:54.370: E/AndroidRuntime(26811): at android.os.AsyncTask$3.done(AsyncTask.java:300) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at java.util.concurrent.FutureTask.setException(FutureTask.java:222) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at java.util.concurrent.FutureTask.run(FutureTask.java:242) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at java.lang.Thread.run(Thread.java:841) 
12-13 03:20:54.370: E/AndroidRuntime(26811): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=0; index=0 
12-13 03:20:54.370: E/AndroidRuntime(26811): at com.nickSoft.Connections.OkHttpHandlerIncoming.doInBackground(OkHttpHandlerIncoming.java:53) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at com.nickSoft.Connections.OkHttpHandlerIncoming.doInBackground(OkHttpHandlerIncoming.java:1) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at android.os.AsyncTask$2.call(AsyncTask.java:288) 
12-13 03:20:54.370: E/AndroidRuntime(26811): at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
12-13 03:20:54.370: E/AndroidRuntime(26811): ... 4 more 

/// CODEを編集した後、私はこのLOGCAT ////////////////

12-13 03:58:36.640: I/ActivityManager(28324): Timeline: Activity_idle id: android.os.BinderProxy@41a7bde0 time:12169583 
12-13 03:59:30.560: W/System.err(29371): java.net.ConnectException: Failed to connect to localhost/127.0.0.1:8306 
12-13 03:59:30.560: W/System.err(29371): at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:189) 
12-13 03:59:30.560: W/System.err(29371): at okhttp3.internal.connection.RealConnection.buildConnection(RealConnection.java:173) 
12-13 03:59:30.560: W/System.err(29371): at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:114) 
12-13 03:59:30.560: W/System.err(29371): at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:193) 
12-13 03:59:30.560: W/System.err(29371): at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:129) 
12-13 03:59:30.560: W/System.err(29371): at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:98) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:109) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:124) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:170) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.RealCall.access$100(RealCall.java:33) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.RealCall$AsyncCall.execute(RealCall.java:120) 
12-13 03:59:30.570: W/System.err(29371): at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32) 
12-13 03:59:30.570: W/System.err(29371): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
12-13 03:59:30.570: W/System.err(29371): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
12-13 03:59:30.570: W/System.err(29371): at java.lang.Thread.run(Thread.java:841) 

Answer 1

あなたのエラーは、このラインから来ているGET -

Request request = new Request.Builder().url(params[0]).build(); 

あなたがStringここにあなたのAsyncTaskに渡していないので -

result = client.execute().get(); 

あなたのコードに基づいて、私はあなたのことを推測します

result = client.execute().get(URL); 

OkHttpはあなたのために、バックグラウンドでコマンドを実行することができます - rがそこにURLを渡します。 AsyncTaskでexecuteを呼び出す代わりに、asynchronous callを使ってOkHttpがenqueueを使ってバックグラウンドタスクを処理させるようにすれば、コードはもっと簡単になります。