java - Update private ListFragment from parent activity -


i have fragmentactivity creates listfragment. inside listfragment custom adapter. when try make adapter public, wouldn't let me. so, don't have access adapter or i'm not sure how it. add data listview statically public arraylist of objects declare in lifecycle. however, other data want retrieve asynctask database. data in parent activity , know right when finished fetching data. so, can update listview within listfragment access arraylist, not access adapter? if so, can activity or need somehow call method in listfragment? if need call method in listfragment, how access method activity? if not possible without access adapter, how access adapter without public keyword? better move asyctask listfragment?

i know sounds lot, i'm wondering how refresh listview cicumstances. appreciated.

call method:

listfragment fragment = (listfragment) getsupportfragmentmanager().findfragmentbytag("fragtag");                 fragment.updatedata();

method refreshes:

public void updatedata(){     ((arrayadapter)this.getlistadapter()).notifydatasetchanged(); }

it in subclass of listfragment, not in methods.

**edit:**now following error:

error parsing data java.lang.classcastexception: com.dynamic_internet_solutions.scsinfo.app.speakerlistfragment$1speakerslistadapter cannot cast android.widget.arrayadapter

**edit - solved: ** did 

listfragment fragment = (listfragment) getsupportfragmentmanager().findfragmentbytag("fragtag"); baseadapter adapter = (baseadapter) fragment.getlistadapter(); adapter.notifydatasetchanged();

after set tag of fragment on initialization.

you have access listadapter of listfragment using getlistadapter() method. can grab list adapter , modify data in it. i'm not sure why having trouble making adapter public. declaring inline, or separate class? error getting compiler?

as aside, might want read 2 articles on view holder pattern , making reusable list adapters make listadapter more awesome.


Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based
Read more

thorough guide for profiling racket code -

did googling ("racket profiling", "racket measure performance"), didn't find , there no examples in docs. did google "profile" search on htdp - no luck. (profile (f ...)) output isn't obvious other small snippets. ideally want python's python -m cprofile usage examples. when search "python profiling", both duckduckgo , google give top result: 26.4. python profilers . (although scanned quickly, seems more of reference "thorough usage guide" examples. if had else in mind, perhaps please link that?) the equivalent racket documentation be: profile: statistical profiler . a usage example: #lang racket (require profile) (profile-thunk (thunk (function-to-profile arg0 arg1) )) here (thunk e) convenience (lambda () e) . bigger example: #lang racket (module mod racket (provide f) (define (f) (for/list ([i 10000]) i))) (require (prefix-in mod: 'mod)) (define (f) (for ([i 10000
Read more