Caused by: java.lang.ClassNotFoundException: net.sf.json.JSONObject in loader da

05-31 14:27:06.466: WARN/System.err(654): java.lang.ClassNotFoundException: net.sf.json.JSONObject
05-31 14:27:06.466: WARN/System.err(654):     at java.lang.Class.classForName(Native Method)
05-31 14:27:06.476: WARN/System.err(654):     at java.lang.Class.forName(Class.java:235)
05-31 14:27:06.476: WARN/System.err(654):     at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:2590)
05-31 14:27:06.485: WARN/System.err(654):     at java.io.ObjectInputStream.readNewClassDesc(ObjectInputStream.java:1846)
05-31 14:27:06.496: WARN/System.err(654):     at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:826)
05-31 14:27:06.496: WARN/System.err(654):     at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:2066)
05-31 14:27:06.496: WARN/System.err(654):     at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:929)
05-31 14:27:06.496: WARN/System.err(654):     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2285)
05-31 14:27:06.496: WARN/System.err(654):     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2240)
05-31 14:27:06.506: WARN/System.err(654):     at com.hz.HttpActivity.onCreate(HttpActivity.java:51)
05-31 14:27:06.506: WARN/System.err(654):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-31 14:27:06.506: WARN/System.err(654):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
05-31 14:27:06.516: WARN/System.err(654):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-31 14:27:06.526: WARN/System.err(654):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-31 14:27:06.526: WARN/System.err(654):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-31 14:27:06.536: WARN/System.err(654):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-31 14:27:06.536: WARN/System.err(654):     at android.os.Looper.loop(Looper.java:123)
05-31 14:27:06.536: WARN/System.err(654):     at android.app.ActivityThread.main(ActivityThread.java:4627)
05-31 14:27:06.546: WARN/System.err(654):     at java.lang.reflect.Method.invokeNative(Native Method)
05-31 14:27:06.546: WARN/System.err(654):     at java.lang.reflect.Method.invoke(Method.java:521)
05-31 14:27:06.556: WARN/System.err(654):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-31 14:27:06.556: WARN/System.err(654):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-31 14:27:06.556: WARN/System.err(654):     at dalvik.system.NativeStart.main(Native Method)
05-31 14:27:06.556: WARN/System.err(654): Caused by: java.lang.NoClassDefFoundError: net.sf.json.JSONObject
05-31 14:27:06.566: WARN/System.err(654):     ... 23 more
05-31 14:27:06.566: WARN/System.err(654): Caused by: java.lang.ClassNotFoundException: net.sf.json.JSONObject in loader dalvik.system.PathClassLoader[/data/app/com.hz-1.apk]
05-31 14:27:06.599: WARN/System.err(654):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
05-31 14:27:06.599: WARN/System.err(654):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
05-31 14:27:06.599: WARN/System.err(654):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
05-31 14:27:06.606: WARN/System.err(654):     ... 23 more