[android-developers] Error while parsing the JSON response.

Suneel Dasari Fri, 09 Jul 2010 11:01:03 -0700

Hi I am getting the below error while parsing JSON.

MY CODE:


Overridden method in POJO RootCategories;

        public String toString(){
                return "Category ID: " + catId
                         + "Category Name: " + catName
                         + "Description: " + description
                         + "isPP: " + isPP
                         + "isRootCategory: " + isRootCategory
                         + "isTerminalCategory: " + isTerminalCategory;
        }

Parser in my Activity:

private List<RootCategories> parse(String jsonString) throws Exception
{

                java.lang.reflect.Type collectionType = new
TypeToken<List<RootCategories>>() {
                }.getType();
                List<RootCategories> rootCategories = new
Gson().fromJson(jsonString,
                                collectionType);
                return rootCategories;
        }

Please help

Thanks
Suneel


07-08 19:21:00.016: WARN/ActivityManager(69): Launch timeout has
expired, giving up wake lock!
07-08 19:21:00.367: WARN/ActivityManager(69): Activity idle timeout
for HistoryRecord{43f8ed70 com.jcp.androidpoc/.CategoryHomeActivity}
07-08 19:21:09.537: DEBUG/dalvikvm(1072):   JDWP invocation returning
with exceptObj=0x43e270c0 (Ljava/lang/NullPointerException;)
07-08 19:21:15.967: DEBUG/dalvikvm(1072): GC_FOR_MALLOC freed 2799
objects / 181800 bytes in 127ms
07-08 19:21:16.228: WARN/System.err(1072):
java.lang.NullPointerException
07-08 19:21:16.247: WARN/System.err(1072):     at
org.apache.harmony.luni.lang.reflect.ListOfTypes.length(ListOfTypes.java:
47)
07-08 19:21:16.268: WARN/System.err(1072):     at
org.apache.harmony.luni.lang.reflect.ImplForType.toString(ImplForType.java:
83)
07-08 19:21:16.286: WARN/System.err(1072):     at
java.lang.StringBuilder.append(StringBuilder.java:203)
07-08 19:21:16.306: WARN/System.err(1072):     at
com.google.gson.JsonDeserializerExceptionWrapper.deserialize(JsonDeserializerExceptionWrapper.java:
56)
07-08 19:21:16.327: WARN/System.err(1072):     at
com.google.gson.JsonDeserializationVisitor.visitUsingCustomHandler(JsonDeserializationVisitor.java:
65)
07-08 19:21:16.327: WARN/System.err(1072):     at
com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:96)
07-08 19:21:16.356: WARN/System.err(1072):     at
com.google.gson.JsonDeserializationContextDefault.fromJsonObject(JsonDeserializationContextDefault.java:
73)
07-08 19:21:16.398: WARN/System.err(1072):     at
com.google.gson.JsonDeserializationContextDefault.deserialize(JsonDeserializationContextDefault.java:
49)
07-08 19:21:16.427: WARN/System.err(1072):     at
com.google.gson.Gson.fromJson(Gson.java:379)
07-08 19:21:16.457: WARN/System.err(1072):     at
com.google.gson.Gson.fromJson(Gson.java:329)
07-08 19:21:16.487: WARN/System.err(1072):     at
com.jcp.androidpoc.CategoryHomeActivity.parse(CategoryHomeActivity.java:
137)
07-08 19:21:16.507: WARN/System.err(1072):     at
com.jcp.androidpoc.CategoryHomeActivity.onCreate(CategoryHomeActivity.java:
76)
07-08 19:21:16.547: WARN/System.err(1072):     at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
1047)
07-08 19:21:16.597: WARN/System.err(1072):     at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2627)
07-08 19:21:16.607: WARN/System.err(1072):     at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2679)
07-08 19:21:16.648: WARN/System.err(1072):     at
android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-08 19:21:16.677: WARN/System.err(1072):     at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-08 19:21:16.717: WARN/System.err(1072):     at
android.os.Handler.dispatchMessage(Handler.java:99)
07-08 19:21:16.756: WARN/System.err(1072):     at
android.os.Looper.loop(Looper.java:123)
07-08 19:21:16.807: WARN/System.err(1072):     at
android.app.ActivityThread.main(ActivityThread.java:4627)
07-08 19:21:16.818: WARN/System.err(1072):     at
java.lang.reflect.Method.invokeNative(Native Method)
07-08 19:21:16.846: WARN/System.err(1072):     at
java.lang.reflect.Method.invoke(Method.java:521)
07-08 19:21:16.867: WARN/System.err(1072):     at
com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-08 19:21:16.887: WARN/System.err(1072):     at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-08 19:21:16.887: WARN/System.err(1072):     at
dalvik.system.NativeStart.main(Native Method)

07-08 19:21:00.016: WARN/ActivityManager(69): Launch timeout has
expired, giving up wake lock!
07-08 19:21:00.367: WARN/ActivityManager(69): Activity idle timeout
for HistoryRecord{43f8ed70 com.jcp.androidpoc/.CategoryHomeActivity}
07-08 19:21:09.537: DEBUG/dalvikvm(1072):   JDWP invocation returning
with exceptObj=0x43e270c0 (Ljava/lang/NullPointerException;)
07-08 19:21:15.967: DEBUG/dalvikvm(1072): GC_FOR_MALLOC freed 2799
objects / 181800 bytes in 127ms
07-08 19:21:16.228: WARN/System.err(1072):
java.lang.NullPointerException
07-08 19:21:16.247: WARN/System.err(1072):     at
org.apache.harmony.luni.lang.reflect.ListOfTypes.length(ListOfTypes.java:
47)
07-08 19:21:16.268: WARN/System.err(1072):     at
org.apache.harmony.luni.lang.reflect.ImplForType.toString(ImplForType.java:
83)
07-08 19:21:16.286: WARN/System.err(1072):     at
java.lang.StringBuilder.append(StringBuilder.java:203)
07-08 19:21:16.306: WARN/System.err(1072):     at
com.google.gson.JsonDeserializerExceptionWrapper.deserialize(JsonDeserializerExceptionWrapper.java:
56)
07-08 19:21:16.327: WARN/System.err(1072):     at
com.google.gson.JsonDeserializationVisitor.visitUsingCustomHandler(JsonDeserializationVisitor.java:
65)
07-08 19:21:16.327: WARN/System.err(1072):     at
com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:96)
07-08 19:21:16.356: WARN/System.err(1072):     at
com.google.gson.JsonDeserializationContextDefault.fromJsonObject(JsonDeserializationContextDefault.java:
73)
07-08 19:21:16.398: WARN/System.err(1072):     at
com.google.gson.JsonDeserializationContextDefault.deserialize(JsonDeserializationContextDefault.java:
49)
07-08 19:21:16.427: WARN/System.err(1072):     at
com.google.gson.Gson.fromJson(Gson.java:379)
07-08 19:21:16.457: WARN/System.err(1072):     at
com.google.gson.Gson.fromJson(Gson.java:329)
07-08 19:21:16.487: WARN/System.err(1072):     at
com.jcp.androidpoc.CategoryHomeActivity.parse(CategoryHomeActivity.java:
137)
07-08 19:21:16.507: WARN/System.err(1072):     at
com.jcp.androidpoc.CategoryHomeActivity.onCreate(CategoryHomeActivity.java:
76)
07-08 19:21:16.547: WARN/System.err(1072):     at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
1047)
07-08 19:21:16.597: WARN/System.err(1072):     at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2627)
07-08 19:21:16.607: WARN/System.err(1072):     at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2679)
07-08 19:21:16.648: WARN/System.err(1072):     at
android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-08 19:21:16.677: WARN/System.err(1072):     at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-08 19:21:16.717: WARN/System.err(1072):     at
android.os.Handler.dispatchMessage(Handler.java:99)
07-08 19:21:16.756: WARN/System.err(1072):     at
android.os.Looper.loop(Looper.java:123)
07-08 19:21:16.807: WARN/System.err(1072):     at
android.app.ActivityThread.main(ActivityThread.java:4627)
07-08 19:21:16.818: WARN/System.err(1072):     at
java.lang.reflect.Method.invokeNative(Native Method)
07-08 19:21:16.846: WARN/System.err(1072):     at
java.lang.reflect.Method.invoke(Method.java:521)
07-08 19:21:16.867: WARN/System.err(1072):     at
com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-08 19:21:16.887: WARN/System.err(1072):     at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-08 19:21:16.887: WARN/System.err(1072):     at
dalvik.system.NativeStart.main(Native Method)
07-08 19:23:15.039: DEBUG/AndroidRuntime(1072): Shutting down VM
07-08 19:23:15.039: WARN/dalvikvm(1072): threadid=1: thread exiting
with uncaught exception (group=0x4001d800)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072): FATAL EXCEPTION: main
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.jcp.androidpoc/
com.jcp.androidpoc.CategoryHomeActivity}:
java.lang.NullPointerException: println needs a message
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2663)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2679)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.os.Handler.dispatchMessage(Handler.java:99)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.os.Looper.loop(Looper.java:123)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.app.ActivityThread.main(ActivityThread.java:4627)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
java.lang.reflect.Method.invokeNative(Native Method)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
java.lang.reflect.Method.invoke(Method.java:521)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
dalvik.system.NativeStart.main(Native Method)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072): Caused by:
java.lang.NullPointerException: println needs a message
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.util.Log.println_native(Native Method)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.util.Log.e(Log.java:215)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
com.jcp.androidpoc.CategoryHomeActivity.onCreate(CategoryHomeActivity.java:
127)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
1047)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2627)
07-08 19:23:15.307: ERROR/AndroidRuntime(1072):     ... 11 more
07-08 19:23:15.537: WARN/ActivityManager(69):   Force finishing
activity com.jcp.androidpoc/.CategoryHomeActivity
07-08 19:23:16.106: WARN/ActivityManager(69): Activity pause timeout
for HistoryRecord{43f8ed70 com.jcp.androidpoc/.CategoryHomeActivity}

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[android-developers] Error while parsing the JSON response.

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