Koj tuaj yeem txav mus rau lwm ntu los ntawm kev siv FragmentManager kev lag luam. Fragment tsis tuaj yeem hu ua xws li kev ua ub no,. Fragments muaj nyob rau ntawm lub neej ntawm kev ua ub no.
Yuav ua li cas koj pib ib feem ntawm lwm tus?
Ua ntej koj xav tau ib qho piv txwv ntawm 2nd fragment. Tom qab ntawd koj yuav tsum muaj cov khoom ntawm FragmentManager thiab FragmentTransaction. Cov lej tiav yog raws li hauv qab no, Fragment2 fragment2 = tshiab Fragment2(); FragmentManager fragmentManager=getActivity().
Yuav ua li cas kuv txav ntawm ib feem mus rau lwm qhov hauv Kotlin?
Qhov piv txwv no qhia tau hais tias yuav xa cov ntaub ntawv ntawm ib Fragment mus rau lwm qhov siv Kotlin. Kauj ruam 1 - Tsim ib qhov project tshiab hauv Android Studio, mus rau File ⇉ New Project thiab sau tag nrho cov ntsiab lus xav tau los tsim ib txoj haujlwm tshiab. Kauj Ruam 3 - Tsim ob FragmentActivity thiab ntxiv cov lej uas tau muab hauv qab no.
Yuav ua li cas koj hu ib tug fragment los ntawm lwm fragment?
Android FragmentManager thiab FragmentTransaction Piv txwv | Hloov Fragment nrog lwm Fragment siv khawm OnClickListener
- beginTransaction(): Los ntawm kev hu rau txoj kev no, peb pib fragment pauv thiab xa rov qab FragmentTransaction .
- findFragmentById(int id): Los ntawm kev hla id, nws rov qab fragment piv txwv.
9 июн ib. Xyoo 2015.
Yuav ua li cas koj nkaum ib feem?
Tsis txhob cuam tshuam nrog cov cim pom pom ntawm lub thawv - FragmentTransaction. zais / qhia ua qhov ntawd sab hauv rau koj. Nyob zoo koj ua nws los ntawm kev siv txoj hauv kev no, tag nrho cov seem yuav nyob hauv lub thawv ib zaug ntxiv thiab tom qab ntawd peb tsuas yog nthuav tawm cov seem uas xav tau thiab zais lwm tus hauv lub thawv.
Yuav ua li cas koj tua ib feem?
fragmentManager. pibTransaction(). hloov (R.
Yuav ua li cas koj yuav kis tau cov ntaub ntawv los ntawm ib feem mus rau lwm lub fragment nyob rau hauv Android siv interface?
Ib txoj hauv kev zoo los ua qhov ntawd yog txhawm rau txheeb xyuas qhov kev hu rov qab hauv qhov tawg thiab xav kom tus tswv tsev ua haujlwm siv nws. Thaum cov haujlwm tau txais kev hu rov qab los ntawm lub interface, nws tuaj yeem qhia cov ntaub ntawv nrog lwm cov fragments hauv qhov kev teeb tsa raws li qhov tsim nyog.
Yuav ua li cas koj navigate los ntawm ib feem mus rau lwm qhov seem hauv Android siv navigation?
Yuav ua li cas txav ntawm Fragments siv cov Navigation Cheebtsam
- Ntxiv cov dependencies rau cov navigation tivthaiv.
- Tsim cov peev txheej navigation graph.
- Ntxiv rau NavHostFragment rau MainActivity layout.
- Tsim Kev Ua kom muaj kev taw qhia ntawm qhov chaw nyob hauv Navigation Graph.
- Siv lub NavController rau Programmatically Navigation ntawm Fragments.
Yuav ua li cas xa cov ntaub ntawv los ntawm fragment mus rau kev ua si hauv Android?
Txhawm rau tso cai rau Fragment sib txuas lus txog nws Txoj Haujlwm, koj tuaj yeem txhais qhov cuam tshuam hauv Fragment chav kawm thiab siv nws hauv Kev Ua Haujlwm. Lub Fragment captures lub interface siv thaum nws onAttach() lifecycle txoj kev thiab ces hu rau lub Interface txoj kev thiaj li yuav sib txuas lus nrog cov kev ua.
Kuv yuav hloov ib qho fragment li cas?
Siv hloov () los hloov cov seem uas twb muaj lawm hauv ib lub thawv nrog piv txwv ntawm cov chav kawm tawg tshiab uas koj muab. Kev hu xov tooj hloov () yog sib npaug rau kev hu tshem tawm () nrog ib feem ntawm lub thawv thiab ntxiv ib qho tshiab rau hauv tib lub thawv. kev lag luam. cog lus();
Peb tuaj yeem tsim qhov sib cuam tshuam ntawm kev ua si thiab tawg paj li cas?
Koj tuaj yeem tsim kev tshaj tawm rau pej xeem cuam tshuam nrog kev tshaj tawm ua haujlwm hauv qhov tawg thiab siv qhov cuam tshuam hauv cov haujlwm. Tom qab ntawd koj tuaj yeem hu rau lub luag haujlwm los ntawm qhov tawg. Kuv tab tom siv Intent los sib txuas lus ua haujlwm rov qab mus rau cov haujlwm tseem ceeb.
Dab tsi yog ib qho fragment in English?
Fragments yog cov kab lus tsis tiav. Feem ntau, fragments yog cov kab lus uas tau dhau los ua kev cuam tshuam los ntawm cov ntsiab lus tseem ceeb. Ib txoj hauv kev yooj yim tshaj plaws los kho lawv yog tshem tawm lub sijhawm ntawm qhov tawg thiab cov ntsiab lus tseem ceeb. Lwm yam kev sau ntawv yuav xav tau rau cov kab lus tshiab ua ke.
Yuav ua li cas koj thiaj paub yog tias ib feem puas pom?
Tsuas yog Resumed() ua kom paub tseeb tias koj cov khoom tawg yog nyob rau hauv pem hauv ntej ntawm tus neeg siv thiab cov neeg siv tuaj yeem cuam tshuam nrog nws yog tias qhov ntawd yog qhov koj tab tom nrhiav. Ib yam uas yuav tsum paub txog, yog tias yogVisible() rov qab pom lub xeev ntawm cov ntu tam sim no.
Lub fragment Android yog dab tsi?
Ib Fragment sawv cev rau ib feem rov siv tau ntawm koj lub app's UI. Ib qho fragment txhais thiab tswj nws tus kheej layout, muaj nws tus kheej lifecycle, thiab muaj peev xwm lis nws tus kheej input txheej xwm. Fragments tsis tuaj yeem nyob ntawm lawv tus kheej - lawv yuav tsum tau tuav los ntawm ib qho kev ua ub no los yog lwm qhov tawg.
Kuv yuav ua li cas txuas ib feem rau ib qho kev ua si?
Ntxiv ib feem rau ib qho haujlwm
Koj tuaj yeem ntxiv koj cov khoom seem rau qhov kev ua haujlwm saib hierarchy los ntawm kev txhais cov fragment hauv koj cov kev ua ub ua no cov ntaub ntawv layout lossis los ntawm kev txhais cov thawv ntim hauv koj cov haujlwm cov ntaub ntawv layout thiab tom qab ntawd programmatically ntxiv cov fragment los ntawm koj qhov kev ua ub no.