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How do I fix android.os.NetworkOnMainThreadException?運行時間錯誤已停止
我剛剛建立了一個演示應用程序通過this tutorial，當我運行應用程序，我得到以下錯誤日誌貓和主應用程序停止。有誰知道我爲什麼得到這個錯誤？
05-11 15:52:06.492: E/AndroidRuntime(584): FATAL EXCEPTION: main
05-11 15:52:06.492: E/AndroidRuntime(584): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.jsonparsing/com.androidhive.jsonparsing.AndroidJSONParsingActivity}: android.os.NetworkOnMainThreadException
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.ActivityThread.access$600(ActivityThread.java:123)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.os.Handler.dispatchMessage(Handler.java:99)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.os.Looper.loop(Looper.java:137)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-11 15:52:06.492: E/AndroidRuntime(584): at java.lang.reflect.Method.invokeNative(Native Method)
05-11 15:52:06.492: E/AndroidRuntime(584): at java.lang.reflect.Method.invoke(Method.java:511)
05-11 15:52:06.492: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-11 15:52:06.492: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-11 15:52:06.492: E/AndroidRuntime(584): at dalvik.system.NativeStart.main(Native Method)
05-11 15:52:06.492: E/AndroidRuntime(584): Caused by: android.os.NetworkOnMainThreadException
05-11 15:52:06.492: E/AndroidRuntime(584): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
05-11 15:52:06.492: E/AndroidRuntime(584): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
05-11 15:52:06.492: E/AndroidRuntime(584): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
05-11 15:52:06.492: E/AndroidRuntime(584): at java.net.InetAddress.getAllByName(InetAddress.java:220)
05-11 15:52:06.492: E/AndroidRuntime(584): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
05-11 15:52:06.492: E/AndroidRuntime(584): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
05-11 15:52:06.492: E/AndroidRuntime(584): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
05-11 15:52:06.492: E/AndroidRuntime(584): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
05-11 15:52:06.492: E/AndroidRuntime(584): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
05-11 15:52:06.492: E/AndroidRuntime(584): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
05-11 15:52:06.492: E/AndroidRuntime(584): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
05-11 15:52:06.492: E/AndroidRuntime(584): at com.androidhive.jsonparsing.JSONParser.getJSONFromUrl(JSONParser.java:38)
05-11 15:52:06.492: E/AndroidRuntime(584): at com.androidhive.jsonparsing.AndroidJSONParsingActivity.onCreate(AndroidJSONParsingActivity.java:54)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.Activity.performCreate(Activity.java:4465)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-11 15:52:06.492: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
05-11 15:52:06.492: E/AndroidRuntime(584): ... 11 more
歡迎來到StackOverlow。請在發佈問題之前進行搜索以查看您的問題是否曾被問過。你的問題是http://stackoverflow.com/questions/6343166/android-os-networkonmainthreadexception的副本，http://stackoverflow.com/questions/8612406/android-os-networkonmainthreadexception-need-to-use-async-任務， http://stackoverflow.com/questions/9413625/android-android-os-networkonmainthreadexception和 http://stackoverflow.com/questions/10208494/error-in-http-connection-android-os-networkonmainthreadexception， – THelper