How to finish an activity from BaseAdapter in android? -
explanation: know repeated question.understand flow of application. have multiple fragments in navigationdrawer when in 1 of fragment.this fragment call baseadapter adapter , select value fragment.after selected item fragment goes mainactivity
here adapter code
package com.angelnx.angelnx.holidays.adapter; import android.app.activity; import android.content.context; import android.content.intent; import android.support.v7.app.appcompatactivity; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.baseadapter; import android.widget.radiobutton; import android.widget.textview; import android.widget.toast; import com.angelnx.angelnx.holidays.handler.databasehandler; import com.angelnx.angelnx.holidays.mainactivity; import com.angelnx.angelnx.holidays.r; import com.angelnx.angelnx.holidays.model.state; import com.angelnx.angelnx.holidays.model.users; import java.util.list; public class stateselectionadapter extends baseadapter{ private context context; private list<state> state_list; private int mselectedvariant; private layoutinflater inflater; private databasehandler db; public stateselectionadapter(context context,list<state> state_list,int mselectedvariant){ this.context=context; this.state_list=state_list; this.mselectedvariant=mselectedvariant; inflater=(layoutinflater)context.getsystemservice(context.layout_inflater_service); } @override public int getcount() { return state_list.size(); } @override public object getitem(int position) { return state_list.get(position); } @override public long getitemid(int position) { return position; } private class holder{ textview state_name; radiobutton radiobutton; } @override public view getview(final int position, view convertview, viewgroup parent) { holder holder=new holder(); if(convertview==null){ convertview=inflater.inflate(r.layout.radiolistviewrow,null); holder.state_name=(textview)convertview.findviewbyid(r.id.tv_maintext); holder.radiobutton=(radiobutton)convertview.findviewbyid(r.id.rb_choice); holder.state_name.settext(this.state_list.get(position).getstate_name()); if(holder.radiobutton.ischecked()){ } convertview.settag(holder); } else{ holder=(holder)convertview.gettag(); } if(position==mselectedvariant){ holder.radiobutton.setchecked(true); } else{ holder.radiobutton.setchecked(false); } convertview.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { mselectedvariant=position; db=new databasehandler(context); users user=new users(); user.setid("1"); user.setselectstate(state_list.get(position).getid()); int no=db.updateuser(user); if(no > 0){ toast.maketext(context, "your state is:"+state_list.get(position).getstate_name(), toast.length_short).show(); } else{ toast.maketext(context, "your state"+state_list.get(position).getstate_name(), toast.length_short).show(); } stateselectionadapter.this.notifydatasetchanged(); intent i=new intent(context, mainactivity.class); i.setflags(intent.flag_activity_clear_top|intent.flag_activity_new_task); context.startactivity(i); ((activity)(context)).finish(); } }); return convertview; } } here error got
fatal exception: main
process: com.angelnx.angelnx.holidays, pid: 14827 java.lang.classcastexception: com.angelnx.angelnx.holidays.app.myapplication cannot cast android.app.activity @ com.angelnx.angelnx.holidays.adapter.stateselectionadapter$1.onclick(stateselectionadapter.java:105) @ android.view.view.performclick(view.java:4438) @ android.view.view$performclick.run(view.java:18422) @ android.os.handler.handlecallback(handler.java:733) @ android.os.handler.dispatchmessage(handler.java:95) @ android.os.looper.loop(looper.java:136) @ android.app.activitythread.main(activitythread.java:5001) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:515) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:785) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:601) @ dalvik.system.nativestart.main(native method) here singleton class namely myapplication.java
package com.angelnx.angelnx.holidays.app; import android.app.application; import android.content.intent; import android.text.textutils; import com.android.volley.request; import com.android.volley.requestqueue; import com.android.volley.toolbox.volley; import com.angelnx.angelnx.holidays.loginactivity; import com.angelnx.angelnx.holidays.helper.mypreferencemanager; public class myapplication extends application{ public static final string tag = myapplication.class .getsimplename(); private static myapplication minstance; private requestqueue mrequestqueue; private mypreferencemanager pref; @override public void oncreate() { super.oncreate(); minstance = this; } public static synchronized myapplication getinstance() { return minstance; } public mypreferencemanager getprefmanager() { if (pref == null) { pref = new mypreferencemanager(this); } return pref; } public requestqueue getrequestqueue() { if (mrequestqueue == null) { mrequestqueue = volley.newrequestqueue(getapplicationcontext()); } return mrequestqueue; } public <t> void addtorequestqueue(request<t> req, string tag) { req.settag(textutils.isempty(tag) ? tag : tag); getrequestqueue().add(req); } public <t> void addtorequestqueue(request<t> req) { req.settag(tag); getrequestqueue().add(req); } public void cancelpendingrequests(object tag) { if (mrequestqueue != null) { mrequestqueue.cancelall(tag); } } }
pass activity reference context in baseadapter class. work perfectly.
here passing application reference context application not casting activity.
use activity reference creating instance of adapter , if creating adapter in fragment use getactivity() method context.
