i-invalidateOptionsMenu() isetshenziselwa ukusho ukuthi i-Android, lokho okuqukethwe kwimenyu kushintshile, futhi imenyu kufanele idwetshwe kabusha. Isibonelo, uchofoza inkinobho eyengeza enye into yemenyu ngesikhathi sokusebenza, noma efihla iqembu lezinto zemenyu. Kulokhu kufanele ushayele invalidateOptionsMenu() , ukuze uhlelo luyidwebe kabusha ku-UI.
Iyiphi indima yokubuyisela okuyiqiniso noma amanga endleleni yokuphinda ushaye kuCreateOptionsMenu?
Ibuyisela i-boolean You kumele abuyele ngokweqiniso imenyu ezoboniswa; uma ubuyisela amanga ngeke kuboniswe.
Iyiphi imenyu evumelekile ku-Android?
Kuzo zonke izinhlobo zemenyu, i-Android inikeza a ifomethi ye-XML ejwayelekile ukuchaza izinto zemenyu. Esikhundleni sokwakha imenyu kukhodi yakho yomsebenzi, kufanele uchaze imenyu nazo zonke izinto zayo kusisetshenziswa semenyu ye-XML. Ungakwazi ke ukufutha insiza yemenyu (yilayishe njengento Yemenyu) emsebenzini wakho noma esiqeshini.
Kuyini ukusetshenziswa kwe-Menuinflater ku-Android?
Leli klasi lisetshenziselwa faka amafayela e-XML emenyu ezintweni zeMenu. Ngenxa yezizathu zokusebenza, ukwehla kwamandla emali kwemenyu kuncike kakhulu ekucutshungulweni kwangaphambili kwamafayela e-XML okwenziwa ngesikhathi sokwakha.
Yiziphi izinhlobo ezimbili zemenyu ye-popup?
Ukusetshenziswa
- Izindlela Zesenzo Sokuqukethwe - "Imodi yesenzo" enikwa amandla lapho umsebenzisi ekhetha into. …
- I-PopupMenu – Imenyu ye-modal egxile ekubukeni okuthile ngaphakathi komsebenzi. …
- I-PopupWindow - Ibhokisi lengxoxo elilula elizuza ukugxila lapho livela esikrinini.
Yini i-ActionBar?
Kuzinhlelo zokusebenza ze-Android, i-ActionBar isici esikhona phezulu kwesikrini somsebenzi. Kuyisici esibalulekile sohlelo lokusebenza lweselula olunobukhona obungaguquki kuyo yonke imisebenzi yalo. Ihlinzeka ngesakhiwo esibonakalayo kuhlelo lokusebenza futhi iqukethe ezinye zezinto ezisetshenziswa njalo kubasebenzisi.
Kuyini ifIgumbi ku-android?
Incazelo. ifIgumbi. Beka le nto kubha yohlelo lokusebenza kuphela uma kukhona indawo yakho. Uma singekho indawo yazo zonke izinto ezimakwe ngokuthi “ifRoom” , izinto ezinamavelu e-oda eliphansiIsigaba aboniswa njengezenzo, futhi izinto ezisele ziboniswa kumenyu yakho konke.
Iyini imisebenzi ku-android?
Usebenzisa umsebenzi njengesigaba esingaphansi sekilasi Lomsebenzi. Umsebenzi inikeza iwindi lapho uhlelo lokusebenza ludonsa i-UI yalo. … Ngokuvamile, umsebenzi owodwa usebenzisa isikrini esisodwa kuhlelo lokusebenza. Ngokwesibonelo, omunye wemisebenzi yohlelo lokusebenza ungase usebenzise isikrini esithi Okuthandwayo, kuyilapho omunye umsebenzi usebenzisa okuthi Khetha isikrini sesithombe.
Iyiphi incazelo engcono kakhulu yesenzo ku-Android?
Encazelweni ye-Google, isenzo sithi: “Ukusebenzisana owakhela Umsizi osekela inhloso ethile futhi onokugcwaliseka okuhambisanayo okucubungula inhloso".
Kufanele siyisebenzise nini i-FrameLayout?
I-FrameLayout yakhelwe ukuvimba indawo esikrinini ukuze ibonise into eyodwa. Ngokuvamile, i-FrameLayout kufanele isetshenziswe ukubamba umbono wengane eyodwa, ngoba kungase kube nzima ukuhlela ukubukwa kwengane ngendlela enwebekayo kumasayizi wesikrini abahlukene ngaphandle kokuthi izingane zidlulelane.
Ngiyisebenzisa kanjani imenyu ye-pop up ku-Android?
Izibonisi ze-Android Popup Menu imenyu engezansi kombhalo wehange uma isikhala sitholakala ngenye indlela ngaphezu kwe umbhalo we-anchor.
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Isibonelo semenyu ye-Popup ye-Android
- <? …
- android:layout_width=”match_parent”
- android:layout_height=”match_parent”
- tools:context="example.javatpoint.com.popupmenu.MainActivity">
- <Inkinobho.