Why does my app force close on moving from one fragment to another on a ImageView click in Android? -

i trying move mycontacts extends fragment tasks extends fragment on clicking imageview. imageview in listview generated using simpleadapter.the ids of layouts follows:r.id.tasky tasks fragment,r.id.mycontacts mycontacts fragment. codes , error logs follows. new fragments kindly explain me step step.

mycontacts extends fragment

 purple.setonclicklistener(new onclicklistener() {  @override public void onclick(view v) {     // todo auto-generated method stub      android.app.fragmenttransaction t = getactivity().getfragmentmanager().begintransaction();         fragment fragment = new tasks();         fragmentmanager fragmentmanager = getactivity().getsupportfragmentmanager();         fragmenttransaction fragmenttransaction = fragmentmanager.begintransaction();         fragmenttransaction.replace(r.id.tasky, fragment);         fragmenttransaction.addtobackstack(null);         fragmenttransaction.commit(); } }); 

error logs:

04-22 04:41:52.486: e/fragmentmanager(3250): no view found id 0x7f04004f (com.example.taskmanager:id/tasky) fragment tasks{b4ee0f70 #1 id=0x7f04004f} 04-22 04:41:52.486: e/fragmentmanager(3250): activity state: 04-22 04:41:53.626: e/androidruntime(3250): fatal exception: main 04-22 04:41:53.626: e/androidruntime(3250): process: com.example.taskmanager, pid: 3250 04-22 04:41:53.626: e/androidruntime(3250): java.lang.illegalargumentexception: no view found id 0x7f04004f (com.example.taskmanager:id/tasky) fragment tasks{b4ee0f70 #1 id=0x7f04004f} 04-22 04:41:53.626: e/androidruntime(3250):     @ android.support.v4.app.fragmentmanagerimpl.movetostate(fragmentmanager.java:919) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.support.v4.app.fragmentmanagerimpl.movetostate(fragmentmanager.java:1104) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.support.v4.app.backstackrecord.run(backstackrecord.java:682) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.support.v4.app.fragmentmanagerimpl.execpendingactions(fragmentmanager.java:1467) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.support.v4.app.fragmentmanagerimpl$1.run(fragmentmanager.java:440) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.os.handler.handlecallback(handler.java:733) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.os.handler.dispatchmessage(handler.java:95) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.os.looper.loop(looper.java:136) 04-22 04:41:53.626: e/androidruntime(3250):     @ android.app.activitythread.main(activitythread.java:5017) 04-22 04:41:53.626: e/androidruntime(3250):     @ java.lang.reflect.method.invokenative(native method) 04-22 04:41:53.626: e/androidruntime(3250):     @ java.lang.reflect.method.invoke(method.java:515) 04-22 04:41:53.626: e/androidruntime(3250):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:779) 04-22 04:41:53.626: e/androidruntime(3250):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:595) 04-22 04:41:53.626: e/androidruntime(3250):     @ dalvik.system.nativestart.main(native method) 04-22 04:45:17.276: e/fragmentmanager(3351): no view found id 0x7f04004f (com.example.taskmanager:id/tasky) fragment tasks{b4ef7ac0 #1 id=0x7f04004f} 04-22 04:45:17.276: e/fragmentmanager(3351): activity state: 04-22 04:45:18.476: e/androidruntime(3351): fatal exception: main 04-22 04:45:18.476: e/androidruntime(3351): process: com.example.taskmanager, pid: 3351 04-22 04:45:18.476: e/androidruntime(3351): java.lang.illegalargumentexception: no view found id 0x7f04004f (com.example.taskmanager:id/tasky) fragment tasks{b4ef7ac0 #1 id=0x7f04004f} 04-22 04:45:18.476: e/androidruntime(3351):     @ android.support.v4.app.fragmentmanagerimpl.movetostate(fragmentmanager.java:919) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.support.v4.app.fragmentmanagerimpl.movetostate(fragmentmanager.java:1104) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.support.v4.app.backstackrecord.run(backstackrecord.java:682) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.support.v4.app.fragmentmanagerimpl.execpendingactions(fragmentmanager.java:1467) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.support.v4.app.fragmentmanagerimpl$1.run(fragmentmanager.java:440) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.os.handler.handlecallback(handler.java:733) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.os.handler.dispatchmessage(handler.java:95) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.os.looper.loop(looper.java:136) 04-22 04:45:18.476: e/androidruntime(3351):     @ android.app.activitythread.main(activitythread.java:5017) 04-22 04:45:18.476: e/androidruntime(3351):     @ java.lang.reflect.method.invokenative(native method) 04-22 04:45:18.476: e/androidruntime(3351):     @ java.lang.reflect.method.invoke(method.java:515) 04-22 04:45:18.476: e/androidruntime(3351):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:779) 04-22 04:45:18.476: e/androidruntime(3351):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:595) 04-22 04:45:18.476: e/androidruntime(3351):     @ dalvik.system.nativestart.main(native method) 

your mycontacts fragment xml not have viewgroup id r.id.tasky. can use interface call activity , replace existing fragment in container another.

you can find code snippets @

http://developer.android.com/training/basics/fragments/communicating.html

in example in docs there listfragment on listitemclick communicate value activity. in activity replace existing fragment new 1 , communicate value same.

similarly on imageview click communicate activity activity replace appropriate fragment in container.