java - passing self writting Object via putExtra() -


i trying pass on selfwritten object "data" of data.class newly created activity "settingsscreen" main activity "mainscreen"

data:

public class data implements serializable {     private string ende;     private string anfang;     private string protocol;     private string urlkomplett;      private string username;     private string password;      private string manufacturer;     private string type;     private string productnr;     private string rfid;      private int scanart;      private sharedpreferences prefs;     private mainscreen main;     private editor edit;     private connectivitymanager connmanager; }

method in mainscreen:

public void optionsbutton(view v) {     intent intent = new intent(this, settingsscreen.class);     intent.putextra("data", data); // crashes here, data object not null     startactivity(intent); }

and oncreate-method of settingsscreen:

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_settings_screen);     data = (data) getintent().getserializableextra("data"); }

and here logcat output:

05-14 09:35:04.040: e/trace(1623): error opening trace file: no such file or directory (2) 05-14 09:35:04.340: d/dalvikvm(1623): gc_for_alloc freed 41k, 9% free 7256k/7939k, paused 65ms, total 66ms 05-14 09:35:04.370: i/dalvikvm-heap(1623): grow heap (frag case) 9.017mb 1536016-byte allocation 05-14 09:35:04.560: d/dalvikvm(1623): gc_concurrent freed <1k, 8% free 8755k/9479k, paused 87ms+3ms, total 190ms 05-14 09:35:04.680: d/dalvikvm(1623): gc_for_alloc freed 0k, 8% free 8755k/9479k, paused 27ms, total 27ms 05-14 09:35:04.690: i/dalvikvm-heap(1623): grow heap (frag case) 10.169mb 1209856-byte allocation 05-14 09:35:04.870: d/dalvikvm(1623): gc_concurrent freed 0k, 8% free 9936k/10695k, paused 125ms+3ms, total 175ms 05-14 09:35:05.100: d/libegl(1623): loaded /system/lib/egl/libegl_emulation.so 05-14 09:35:05.191: d/(1623): hostconnection::get() new host connection established 0x2a13f270, tid 1623 05-14 09:35:05.223: d/libegl(1623): loaded /system/lib/egl/libglesv1_cm_emulation.so 05-14 09:35:05.230: d/libegl(1623): loaded /system/lib/egl/libglesv2_emulation.so 05-14 09:35:05.401: w/egl_emulation(1623): eglsurfaceattrib not implemented 05-14 09:35:05.410: d/openglrenderer(1623): enabling debug mode 0 05-14 09:35:07.715: w/egl_emulation(1623): eglsurfaceattrib not implemented 05-14 09:35:10.301: d/androidruntime(1623): shutting down vm 05-14 09:35:10.301: w/dalvikvm(1623): threadid=1: thread exiting uncaught exception (group=0x40a13300)  05-14 09:35:10.401: e/androidruntime(1623): fatal exception: main 05-14 09:35:10.401: e/androidruntime(1623): java.lang.illegalstateexception: not execute method of activity 05-14 09:35:10.401: e/androidruntime(1623):     @ android.view.view$1.onclick(view.java:3591) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.view.view.performclick(view.java:4084) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.view.view$performclick.run(view.java:16966) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.handler.handlecallback(handler.java:615) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.handler.dispatchmessage(handler.java:92) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.looper.loop(looper.java:137) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.app.activitythread.main(activitythread.java:4745) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.lang.reflect.method.invokenative(native method) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.lang.reflect.method.invoke(method.java:511) 05-14 09:35:10.401: e/androidruntime(1623):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:786) 05-14 09:35:10.401: e/androidruntime(1623):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:553) 05-14 09:35:10.401: e/androidruntime(1623):     @ dalvik.system.nativestart.main(native method) 05-14 09:35:10.401: e/androidruntime(1623): caused by: java.lang.reflect.invocationtargetexception 05-14 09:35:10.401: e/androidruntime(1623):     @ java.lang.reflect.method.invokenative(native method) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.lang.reflect.method.invoke(method.java:511) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.view.view$1.onclick(view.java:3586) 05-14 09:35:10.401: e/androidruntime(1623):     ... 11 more 05-14 09:35:10.401: e/androidruntime(1623): caused by: java.lang.runtimeexception: parcelable encountered ioexception writing serializable object (name = com.test.app.data) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.parcel.writeserializable(parcel.java:1279) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.parcel.writevalue(parcel.java:1233) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.parcel.writemapinternal(parcel.java:591) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.bundle.writetoparcel(bundle.java:1619) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.parcel.writebundle(parcel.java:605) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.content.intent.writetoparcel(intent.java:6470) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.app.activitymanagerproxy.startactivity(activitymanagernative.java:1741) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.app.instrumentation.execstartactivity(instrumentation.java:1411) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.app.activity.startactivityforresult(activity.java:3351) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.app.activity.startactivityforresult(activity.java:3312) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.app.activity.startactivity(activity.java:3522) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.app.activity.startactivity(activity.java:3490) 05-14 09:35:10.401: e/androidruntime(1623):     @ com.test.app.mainscreen.optionsbutton(mainscreen.java:140) 05-14 09:35:10.401: e/androidruntime(1623):     ... 14 more 05-14 09:35:10.401: e/androidruntime(1623): caused by: java.io.notserializableexception: android.net.connectivitymanager 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writenewobject(objectoutputstream.java:1364) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writeobjectinternal(objectoutputstream.java:1671) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writeobject(objectoutputstream.java:1517) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writeobject(objectoutputstream.java:1481) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writefieldvalues(objectoutputstream.java:979) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.defaultwriteobject(objectoutputstream.java:368) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writehierarchy(objectoutputstream.java:1074) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writenewobject(objectoutputstream.java:1404) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writeobjectinternal(objectoutputstream.java:1671) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writeobject(objectoutputstream.java:1517) 05-14 09:35:10.401: e/androidruntime(1623):     @ java.io.objectoutputstream.writeobject(objectoutputstream.java:1481) 05-14 09:35:10.401: e/androidruntime(1623):     @ android.os.parcel.writeserializable(parcel.java:1274) 05-14 09:35:10.401: e/androidruntime(1623):     ... 26 more 05-14 09:35:12.700: i/process(1623): sending signal. pid: 1623 sig: 9

in order serialiable class must:

  1. implements serializable interface
  2. every member inside class must implements serializable

if 2 requirements not meet class can not serialized.

in case private connectivitymanager connmanager; not implements serializable can not serialized. causing exception. if want keep inside class , want serialize class can add transient keyoword

private transient connectivitymanager connmanager;

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