animation - Exception while removing a view from a LinearLayout in Android -


im trying animate custom view before removing linearlayout container. keep getting nullpointerexception can't trace anywhere specific.

the exception happens when have added 2 views , remove first one.

my code is:

protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.form_alg);     fadeinanimation = animationutils.loadanimation(getapplicationcontext(),             r.anim.witness_fade_in);      list = (linearlayout) this.findviewbyid(r.id.alg_list_getuigen);      addwitness = (imagebutton)             .findviewbyid(r.id.alg_getuige_toevoegen);     addwitness.setonclicklistener(new onclicklistener() {         @override         public void onclick(view v) {             final view w = view.inflate(getapplicationcontext(),                     r.layout.form_getuige, null);              imagebutton button = (imagebutton) w                     .findviewbyid(r.id.getuige_verwijderen);             button.setonclicklistener(new android.view.view.onclicklistener() {                  @override                 public void onclick(view v) {                     log.d(tag, "deleteview");                     animation fadeoutanimation = animationutils                             .loadanimation(getapplicationcontext(),                                     r.anim.witness_fade_out);                     fadeoutanimation                             .setanimationlistener(new animationlistener() {                                 @override                                 public void onanimationend(                                         animation animation) {                                     list.removeview(w);                                     list.invalidate();                                 }                                  @override                                 public void onanimationrepeat(                                         animation animation) {                                 }                                  @override                                 public void onanimationstart(                                         animation animation) {                                 }                             });                     w.setvisibility(view.visible);                     w.startanimation(fadeoutanimation);                     w.setvisibility(view.invisible);                 }             });             log.d(tag, "addview");              w.setvisibility(view.invisible);             list.addview(w);             w.startanimation(fadeinanimation);             w.setvisibility(view.visible);             list.invalidate();         }      }); }

here stacktrace:

07-03 03:17:30.335: warn/dalvikvm(343): threadid=1: thread exiting uncaught exception (group=0x40015560) 07-03 03:17:30.365: error/androidruntime(343): fatal exception: main 07-03 03:17:30.365: error/androidruntime(343): java.lang.nullpointerexception 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.dispatchdraw(viewgroup.java:1372) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.drawchild(viewgroup.java:1644) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.dispatchdraw(viewgroup.java:1373) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.view.draw(view.java:6986) 07-03 03:17:30.365: error/androidruntime(343):     @ android.widget.framelayout.draw(framelayout.java:357) 07-03 03:17:30.365: error/androidruntime(343):     @ android.widget.scrollview.draw(scrollview.java:1409) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.drawchild(viewgroup.java:1646) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.dispatchdraw(viewgroup.java:1373) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.drawchild(viewgroup.java:1644) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.dispatchdraw(viewgroup.java:1373) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.view.draw(view.java:6883) 07-03 03:17:30.365: error/androidruntime(343):     @ android.widget.framelayout.draw(framelayout.java:357) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.drawchild(viewgroup.java:1646) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.dispatchdraw(viewgroup.java:1373) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.drawchild(viewgroup.java:1644) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewgroup.dispatchdraw(viewgroup.java:1373) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.view.draw(view.java:6883) 07-03 03:17:30.365: error/androidruntime(343):     @ android.widget.framelayout.draw(framelayout.java:357) 07-03 03:17:30.365: error/androidruntime(343):     @ com.android.internal.policy.impl.phonewindow$decorview.draw(phonewindow.java:1862) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewroot.draw(viewroot.java:1522) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewroot.performtraversals(viewroot.java:1258) 07-03 03:17:30.365: error/androidruntime(343):     @ android.view.viewroot.handlemessage(viewroot.java:1859) 07-03 03:17:30.365: error/androidruntime(343):     @ android.os.handler.dispatchmessage(handler.java:99) 07-03 03:17:30.365: error/androidruntime(343):     @ android.os.looper.loop(looper.java:123) 07-03 03:17:30.365: error/androidruntime(343):     @ android.app.activitythread.main(activitythread.java:3683) 07-03 03:17:30.365: error/androidruntime(343):     @ java.lang.reflect.method.invokenative(native method) 07-03 03:17:30.365: error/androidruntime(343):     @ java.lang.reflect.method.invoke(method.java:507) 07-03 03:17:30.365: error/androidruntime(343):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:839) 07-03 03:17:30.365: error/androidruntime(343):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:597) 07-03 03:17:30.365: error/androidruntime(343):     @ dalvik.system.nativestart.main(native method)

i had same problem. have use handler execute code modifies ui (removeview() in case). add handler field , construct in oncreate() method. then, in onanimationend(), this:

fhandler.post(new runnable() {     @override     public void run() {         list.removeview(w);         list.invalidate();     } }

Comments

Post a Comment

Popular posts from this blog

c++ - Is it possible to compile a VST on linux? -

for class project i'm attempting write vst plugin backed cuda. current cuda workflow on linux box, i'd prefer compile , link there. according wikipedia , should possible (i couldn't find steinberg documentation relevant linux) can't find makefile or instructions on how build if aren't using xcode or visual studio. i'm vst 3 sdk doesn't support linux. when try compile plugin under linux, error: ./base/source/fatomic.cpp:39:30: fatal error: libkern/osatomic.h: no such file or directory this issue caused following code in "vst3 sdk/base/source/fatomic.cpp" #if mac #include <libkern/osatomic.h> #if mac_os_x_version_min_required > mac_os_x_version_10_4 #define native_atomic_type (volatile int32_t*) #else #define native_atomic_type (int32_t*) #endif #elif windows #include <windows.h> #endif but hope compiling under linux work vst sdk 2.4. reading. jvstwrapper seems run on lin...
Read more

java - Output of Eclipse is rubbish -

i want write program in eclipse language different english. when display output using system.out program, displays output correctly in console editor. when accept input console , output it, output rubbish. how can solve it. many thnaks i'm not sure if problem, have character encoding problem. make sure you're using unicode, utf-8. you can read more @ official docs converting non-unicode text .
Read more

jquery - Confused with JSON data and normal data in Django ajax request -

i read json internet still have not got grasp of it. reading article http://webcloud.se/log/ajax-in-django-with-jquery/ i not understood first part function using json def xhr_test(request, format): if request.is_ajax(): if format == 'xml': mimetype = 'application/xml' if format == 'json': mimetype = 'application/javascript' data = serializers.serialize(format, examplemodel.objects.all()) return httpresponse(data,mimetype) # if want prevent non xhr calls else: return httpresponse(status=400) my main problems are from function getting format variable does format json mean data given function json or data recived json can give me simple example ouput of function data = serializers.serialize(format, examplemodel.objects.all()) how use data when response in jquery function if don't use json in above function how input , response chnage thanks ...
Read more