android json/xml api'ye bağlanıyor

Question

JSON belgesi almak için bir dinlenme api ile iletişim kurmaya çalışıyorum, ancak uygulamayı Eclipse Android öykünücüsü'nde çalıştırdığımda, uygulama başlatılır başlatılmaz kapanıyor ("Ne yazık ki TestRest var) "durdu. HttpClient.execute yöntemine yapılan çağrı nedeniyle kapanmış gibi görünüyor.

ana aktivite için kod aşağıda: gerçekten android geliştirme ve birlikte

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="org.john.testRes" 
    android:versionCode="1" 
    android:versionName="1.0" > 
    <uses-permission android:name="android.permission.INTERNET" /> 

çok tanıdık değil:

Ayrıca

public class TestRestActivity extends Activity { 
    /** Called when the activity is first created. */ 
    TextView info; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     info = (TextView) findViewById(R.id.debug); 

     String testUri = "http://www.entireweb.com/xmlquery?pz=MYAPIKEY&ip=IP&q=pizza&n=50&format=json"; 
     // print the uri to the screen - (not seen if rest of code runs) 
     info.setText(testUri); 

     HttpClient httpclient = new DefaultHttpClient(); 
     HttpContext localContext = new BasicHttpContext(); 
     HttpGet httpget = new HttpGet(testUri); 


     HttpResponse response = null; 
     try { 
      // TODO fails on this line 
      response = httpclient.execute(httpget, localContext); 

      HttpEntity entity = response.getEntity(); 
      if (entity != null) { 
       info.setText("got it"); 
      } 

     } catch (ClientProtocolException e) { 
      // Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // Auto-generated catch block 
      e.printStackTrace(); 
     } finally { 
     } 

    } 
} 

Ben aşağıda benim manifest dosyasında web izinleri dahil ettik soruna neyin sebep olduğu konusunda clueless. Kullanıyorum api iyi ve tarayıcımdan beklenen json belgeyi döndürür. Kullandığım AVD tarayıcısında internete bağlanabilir ve uygulamayı birkaç farklı AVD'de denedim.

Soruna neden olan herhangi bir öneriniz var mı? Teşekkürler.

Düzenleme: eklenen hatalar

11-22 18:13:14.221: D/AndroidRuntime(556): Shutting down VM 
11-22 18:13:14.221: W/dalvikvm(556): threadid=1: thread exiting with uncaught exception (group=0x409951f8) 
11-22 18:13:14.251: E/AndroidRuntime(556): FATAL EXCEPTION: main 
11-22 18:13:14.251: E/AndroidRuntime(556): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.john.testRes/org.john.testRes.TestRestActivity}: android.os.NetworkOnMainThreadException 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.ActivityThread.access$600(ActivityThread.java:122) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.os.Handler.dispatchMessage(Handler.java:99) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.os.Looper.loop(Looper.java:137) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.ActivityThread.main(ActivityThread.java:4340) 
11-22 18:13:14.251: E/AndroidRuntime(556): at java.lang.reflect.Method.invokeNative(Native Method) 
11-22 18:13:14.251: E/AndroidRuntime(556): at java.lang.reflect.Method.invoke(Method.java:511) 
11-22 18:13:14.251: E/AndroidRuntime(556): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
11-22 18:13:14.251: E/AndroidRuntime(556): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
11-22 18:13:14.251: E/AndroidRuntime(556): at dalvik.system.NativeStart.main(Native Method) 
11-22 18:13:14.251: E/AndroidRuntime(556): Caused by: android.os.NetworkOnMainThreadException 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1084) 
11-22 18:13:14.251: E/AndroidRuntime(556): at java.net.InetAddress.lookupHostByName(InetAddress.java:391) 
11-22 18:13:14.251: E/AndroidRuntime(556): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242) 
11-22 18:13:14.251: E/AndroidRuntime(556): at java.net.InetAddress.getAllByName(InetAddress.java:220) 
11-22 18:13:14.251: E/AndroidRuntime(556): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 
11-22 18:13:14.251: E/AndroidRuntime(556): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
11-22 18:13:14.251: E/AndroidRuntime(556): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
11-22 18:13:14.251: E/AndroidRuntime(556): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
11-22 18:13:14.251: E/AndroidRuntime(556): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
11-22 18:13:14.251: E/AndroidRuntime(556): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
11-22 18:13:14.251: E/AndroidRuntime(556): at org.john.testRes.TestRestActivity.onCreate(TestRestActivity.java:41) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.Activity.performCreate(Activity.java:4465) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
11-22 18:13:14.251: E/AndroidRuntime(556): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 
11-22 18:13:14.251: E/AndroidRuntime(556): ... 11 more 
11-22 18:13:48.321: I/Process(556): Sending signal. PID: 556 SIG: 9 
11-22 18:14:01.552: D/AndroidRuntime(597): Shutting down VM 

Answer 1

sorun ana UI iş parçacığı üzerinde ağ işlemleri yapmaya çalışıyor olmasıdır. Bunları ayrı bir iş parçacığında yapmanız gerekir. Bir AsyncTask veya sadece standart bir Thread kullanabilirsiniz. İşte

basit bir örnek:

final Handler handler = new Handler(); 
new Thread(new Runnable() { 

    @Override 
    public void run() { 
      // Do something long running 
      handler.post(new Runnable() { 

       @Override 
       public void run() { 
        // Do something on the UI Thread 
       } 
      }); 
    } 
}).start();