java - how to check if fragment exists and is Visible in a container? how to remove it if it exists? -

-

i calling method displays data on button click everytime. each time button clicked call method that

  • creates frag object
  • bundles data frag
  • puts data in frag
  • adds frag view in main activity
  • commits transaction

i'm facing 'caused by: java.lang.illegalstateexception: commit called'

on button click need check if frag exists , either replace or something. i'm confused.

here's code.

public void retrieve_and_display_data(string co) {      string res = null;       try {          res = new getvaluefromservicecall().execute(co, "", "").get();      } catch (interruptedexception e) {          e.printstacktrace();      } catch (executionexception e) {          e.printstacktrace();      }       list < string > company_stock_details = arrays.aslist(res.split(",(?=([^\"]*\"[^\"]*\")*[^\"]*$)", -1));       stock_price_frag frag_obj = new stock_price_frag();         bundle b = new bundle();      b.putstring("co_name", "data1");      b.putstring("co_first", "data2");      b.putstring("co_last", "data3");       frag_obj.setarguments(b);        ft.add(r.id.frag_container, frag_obj, "fragment");       ft.commit();       //error on commit  } 

fragmenttransaction.replace(r.id.fragment_container, fragment, mainactivity.tag);

use tag when add fragment frame layout

and add check when button click 

if (getsupportfragmentmanager().findfragmentbytag(mainactivity.tag) instanceof myfragment)       //my fragment visible  else       //other fragment visibile

Comments

Post a Comment

Popular posts from this blog

Spring Boot + JPA + Hibernate: Unable to locate persister -

-
i trying work entity inside request method of spring boot application. entity in project , pom.xml has dependencies it. why error message?: org.hibernate.unknownentitytypeexception: unable locate persister: com.ric.bill.model.bs.par package com.ric.web; import java.util.concurrent.atomic.atomiclong; import javax.persistence.entitymanager; import javax.persistence.persistencecontext; import net.sf.ehcache.cachemanager; import net.sf.ehcache.management.cache; import net.sf.ehcache.management.cachestatistics; import org.hibernate.stat.statistics; import org.springframework.beans.factory.annotation.autowired; import org.springframework.boot.autoconfigure.domain.entityscan; import org.springframework.cache.annotation.enablecaching; import org.springframework.transaction.annotation.enabletransactionmanagement; import org.springframework.transaction.annotation.propagation; import org.springframework.transaction.annotation.transactional; import org.springframework.web.bind.annotati
Read more

go - Golang: panic: runtime error: invalid memory address or nil pointer dereference using bufio.Scanner -

-
i implementing go program uses bufio.scanner , bufio.writer have packaged code follows package main import ( "fmt" "player/command" "strings" ) func main() { //enter code here. read input stdin. print output stdout commands.scanner.scan() { //scan new line , send comand variable check command exist or not input := strings.split(strings.trim(commands.scanner.text(), " "), " ") command := input[0] if command == "" { fmt.printf("$ %s:", commands.pwd) continue } if !commands.commands[command] { commands.throwerror("cannot recognize input.") } else { commands.execute(command, input[1:], nil) } fmt.printf("$ %s:", commands.pwd) } } i using init.go file in main package follows package main import ( "flag" "player/sourc
Read more

c - double free or corruption (fasttop) -

-
this code reads null terminated string file (file containing null terminated strings & should provide index wanted string). error: *** error in `./main': double free or corruption (fasttop): 0x090a4a80 *** aborted code: char *tmp_realloc=null; char *sstring=null; int i=1; /*set file pointer point string*/ fseek(fh,index,seek_set); sstring=(char*)malloc(sizeof(char)); if(sstring == null) return null; tmp_realloc=sstring; while( (*(sstring+i-1)=(char)fgetc((file*)fh)) != 0x0 ) { /*reallocate more memory*/ tmp_realloc=(char*)realloc((char*)sstring,++i); /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strcpy((char*)tmp_realloc,(char*)sstring); free(sstring); sstring=tmp_realloc; } } could tell me pointer causing issue (& reason) ? remove part /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strc
Read more