Yuav Ua Li Cas Tso Ib Daim Duab Dua Hauv Android

Yuav Ua Li Cas Tso Ib Daim Duab Tshaj Rau Lwm Tus ntawm Android

Hauv Android mobile thov kev txhim kho, feem ntau tshwm sim qhov yuav tsum tau muab cov duab sib tshooj txhawm rau tsim cov duab pom lossis sib txuas cov duab ntse, Android muab ntau yam cuab yeej thiab cov yam ntxwv uas ua rau nws yooj yim rau kev tso ⁤ ntawm ib qho duab dhau⁢ lwm qhov. . Hauv tsab xov xwm no, peb yuav tshawb xyuas cov kauj ruam los ntawm kauj ruam yuav ua li cas ua tiav cov txiaj ntsig no siv ntau txoj hauv kev thiab cov tswv yim muaj nyob hauv Android programming ib puag ncig.

1. Siv cov chav kawm Drawable

Thawj txoj hauv kev peb yuav tshawb⁢ yog siv chav kawm Drawable ntawm Android. Cov chav kawm no sawv cev rau txhua yam khoom uas tuaj yeem kos rau ntawm daim ntaub thiab tuaj yeem ua ib qho duab lossis duab geometric. Txhawm rau overlay cov duab,⁤ peb yuav xub thauj ob cov duab los ntawm lawv qhov xwm txheej Drawable thiab tom qab ntawd muab lawv⁢ siv txoj kev setBounds(). Thaum cov duab tau muab tso rau kom raug, peb tuaj yeem siv txoj kev kos() kos lawv rau ntawm daim ntaub.

2. Siv cov chav kawm ImageView⁤

Lwm txoj hauv kev nrov rau overlay dluab ntawm Android yog siv cov chav kawm ImageView. Chav kawm no tshwj xeeb hauv ⁤ duab tso saib tuaj yeem txuas ntxiv los kho nws tus cwj pwm. Txhawm rau overlay cov duab siv ImageView, peb yuav xub thauj cov duab los ntawm cov peev txheej lossis los ntawm ⁢ ib qhov URL. Tom qab ntawd, peb yuav siv txoj hauv kev zoo li setImageBitmap() o setImageResource() los teeb⁤ cov duab hauv ImageView. Android: layout_margin ⁢ thiab android: layout_width hauv ⁤ XML ntawv ntawm kev tsim.

3. Siv cov chav kawm Canvas

Chav kawm Canvas Android muab peb txoj hauv kev zoo tshaj plaws rau overlay dluab thiab ntxiv cov teebmeem pom. Nrog Canvas, peb tuaj yeem ua cov duab kos xws li kos duab kab, voj voog, duab plaub thiab, tau kawg, overlaying dluab. Txhawm rau ua tiav qhov no, peb yuav xub tsim ib yam khoom ntawm hom Bitmap khaws peb cov duab thiab tom qab ntawd siv txoj hauv kev zoo li drawBitmap() y kosText() ⁢ kos⁤ cov ntsiab lus xav tau ntawm daim ntaub.

Nyob rau hauv luv luv, lub peev xwm los overlay cov duab ntawm Android yog qhov tseem ceeb los tsim txaus nyiam cov neeg siv interfaces nplua nuj nyob rau hauv cov ntsiab lus pom. Los ntawm kev siv chav kawm Drawable thiab ImageView kom tau txais txiaj ntsig ntawm ntau yam ntawm Canvas chav kawm, muaj ntau txoj kev xaiv kom ua tiav cov txiaj ntsig no. Los ntawm kev paub txog cov tswv yim no, cov neeg tsim khoom tuaj yeem yooj yim ntxiv cov yam ntxwv no rau lawv Cov kev siv hauv xov tooj ntawd, yog li txhim kho cov neeg siv kev paub.

- Taw qhia rau Duab Overlay ntawm Android

Duab overlay ntawm Android yog cov txheej txheem muaj txiaj ntsig zoo uas tso cai rau koj los ua ke cov duab sib txawv los tsim cov duab zoo nkauj hauv koj daim ntawv thov nrog cov txheej txheem no, koj tuaj yeem tso ib daim duab rau ntawm lwm tus kom ob lub ntsiab lus ⁢ yog ⁤ tso rau ntawm qhov screen. tib lub sijhawm. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog thaum koj xav qhia cov ntsiab lus tshwj xeeb lossis thaum koj xav tsim cov teebmeem pom tseeb lossis sib koom ua ke cov duab. Nrog rau cov lus qhia no, koj yuav kawm paub yuav ua li cas ua cov duab overlay ntawm Android thiab yuav ua li cas kom tau txais txiaj ntsig zoo tshaj plaws hauv koj cov apps.

Txhawm rau overlay cov duab ntawm Android, koj yuav tsum tau siv cov chav kawm ImageView thiab coj kom zoo dua ntawm nws cov cwj pwm tshwj xeeb thiab cov hau kev. Koj tuaj yeem pib los ntawm kev tsim ib txoj haujlwm tshiab hauv Android Studio thiab ntxiv cov duab koj xav kom dhau mus rau koj qhov project cov peev txheej folder. Tom qab ntawd, hauv koj cov ntaub ntawv layout XML, koj tuaj yeem ntxiv ImageView rau txhua daim duab uas koj xav tau tshaj. Nco ntsoov teem "src" cwj pwm ntawm txhua ImageView nrog rau txoj hauv kev rau cov duab sib xws.

Thaum koj tau ntxiv ImageViews rau koj cov ntaub ntawv layout XML, koj tuaj yeem siv cov cwj pwm zoo li hauv: layout_width thiab android: layout_height los teeb qhov loj thiab txoj hauj lwm ntawm cov duab ntawm lub vijtsam. Koj tseem tuaj yeem siv "Android: scaleType" tus cwj pwm los tswj cov duab li cas hauv ImageViews. Nco ntsoov kho cov cwj pwm no kom ua tau raws li qhov xav tau ⁤ overlay effect. Tsis tas li ntawd, koj tuaj yeem ua si nrog lwm tus cwj pwm, xws li "Android: alpha", los tswj cov duab pom, lossis "Android: kev sib hloov" los siv cov kev sib hloov rau lawv.

- Yuav ua li cas ntxiv ib daim duab nyob rau sab saum toj ntawm lwm yam ntawm Android

Overlay Ib daim duab saum toj ntawm lwm qhov hauv daim ntawv thov Android tuaj yeem ua tau txoj kev zoo rau txhim khu qhov pom kev thov ntawm koj lub app. Hmoov zoo, Android muab ntau yam txoj kev thiab cov cuab yeej uas tso cai rau developers ua tiav qhov no nrog yooj yim. Hauv tsab ntawv no, peb yuav tshawb txawv mus kom ze rau ntxiv ib daim duab nyob rau sab saum toj ntawm lwm yam hauv Android.

Ib qho kev xaiv rau overlay ib daim duab ntawm lwm tus hauv Android yog siv cov⁤ ImageView thiab NumLayout chav kawm. Lub ⁤ ImageView chav kawm yog dav siv los tso saib cov duab, thaum lub NumLayout Cov chav kawm ua rau cov neeg tsim khoom tsim kom muaj ntau qhov kev pom nyob rau sab saum toj ntawm ⁤ txhua⁤ lwm tus. Los ntawm kev tso ob ImageView piv txwv hauv ib NumLayout thawv, koj tuaj yeem sib tshooj ib daim duab saum toj ntawm lwm tus.

Lwm txoj hauv kev rau ntxiv ⁢ ib daim duab tshaj lwm qhov hauv Android yog los ntawm kev siv lub Canvas class. Cov Canvas chav kawm ⁢ muab a 2D duab lub moj khaum qhov twg koj tuaj yeem siv ntau yam haujlwm,⁤ xws li kos duab kab, voj voog, thiab cov duab, ntawm qhov chaw sib txawv. Los ntawm kev siv lub Canvas chav kawm, koj tuaj yeem ua tau kos ib daim duab saum toj ntawm lwm tus⁢ thiab tswj lawv txoj haujlwm, qhov ntau thiab tsawg, thiab qhov pom tseeb. Txoj kev no ua rau koj ntau dua tswj tshaj lub pom kev cuam tshuam ntawm daim duab overlay.

Raws li koj tau pom, muaj⁢ muaj ntau yam txoj kev rau ntxiv ib daim duab ⁢ nyob rau sab saum toj ntawm lwm qhov hauv Android. Seb koj puas xav siv lub ImageView thiab NumLayout cov chav kawm los yog cov Canvas chav kawm, nws⁤ txhua yam nyob ntawm koj kev cai tshwj xeeb thiab cov xav tau koj xav ua kom tiav.⁤ Los ntawm kev sib txuas ua ke cov txheej txheem no nrog lwm cov nta muaj los ntawm Android platform, koj tuaj yeem tsim visually captivating apps⁤ uas yeej impress koj⁤ cov neeg siv.

- Xaiv lub tsev qiv ntawv duab rau overlay

Xaiv cov tsev qiv ntawv duab rau Overlay

Yog tias koj tab tom nrhiav txoj hauv kev yooj yim los tso ib daim duab rau saum lwm tus hauv koj lub ⁢Android app, ⁢ koj ⁤ nyob rau hauv qhov chaw. Hauv qhov kev qhia no, kuv yuav qhia koj yuav ua li cas siv lub tsev qiv ntawv duab kom ua tiav qhov kev ua haujlwm overlay no sai thiab ua tau zoo.

Ib lub tsev qiv ntawv nrov tshaj plaws thiab txhim khu kev qha rau cov duab overlaying ntawm Android yog Picasso. Lub tsev qiv ntawv no tso cai rau koj thauj cov duab los ntawm ntau qhov chaw, xws li URL, cov ntaub ntawv hauv zos, lossis cov peev txheej Drawable, thiab yooj yim overlay lawv. Tsis tas li ntawd, Picasso tseem muaj cov duab zoo tshaj plaws, xws li resizing thiab cropping, muab koj tswj ntau dua li cas cov overlay yuav tshwm sim.

Lwm qhov kev xaiv nrov yog Glide. Zoo li Picasso, Glide ⁤ tso cai rau koj los thauj cov duab los ntawm ntau qhov chaw thiab muab tso rau lawv. Txawm li cas los xij, Glide kuj suav nrog cov yam ntxwv ntxiv, xws li muaj peev xwm upload cov duab animated thiab kev txhawb nqa rau GIF dluab Qhov no tuaj yeem pab tau tshwj xeeb yog tias koj ua haujlwm nrog cov duab dynamic uas yuav tsum muaj cov animated overlay.

xaus

Hauv luv luv, yog tias koj tab tom nrhiav txoj hauv kev yooj yim thiab muaj txiaj ntsig rau txheej ib daim duab saum toj ntawm lwm tus hauv koj lub Android app, koj tuaj yeem siv cov tsev qiv ntawv duab zoo li Picasso lossis Glide. Cov tsev qiv ntawv no tso cai rau koj thauj cov duab los ntawm ntau qhov chaw thiab yooj yim overlay Ntxiv rau lawv, lawv muab cov duab ntxiv rau kev tswj hwm ntau dua. Txawm hais tias koj xav tau overlay cov duab zoo li qub lossis cov duab animated, cov tsev qiv ntawv no muab cov cuab yeej rau koj ua kom sai thiab ua tau zoo yog li tsis txhob yig mus sim lawv thiab coj koj cov apps hauv Android mus rau qib tom ntej.

- Qauv ⁤code rau overlay ⁢ duab ntawm Android

Txhawm rau superimpose ib daim duab nyob rau sab saum toj ntawm lwm tus ntawm Android, nws yog qhov yuav tsum tau siv lub tswv yim ntawm txheej txheej. Qhov no tso cai rau peb tso ib daim duab rau sab saum toj ntawm lwm tus thiab tswj nws txoj haujlwm thiab qhov zoo li no qauv code ⁤ uas⁢ yuav ua lub hauv paus pib kom ua tiav ⁢ cov nyhuv no.

Ua ntej tshaj plaws, koj yuav tsum tsim ib qho layout hauv koj cov ntaub ntawv XML uas koj tuaj yeem tso cov duab. Koj tuaj yeem siv RelativeLayout ua lub thawv loj los pab kom pom cov duab. Tom qab ntawd, nyob rau hauv qhov layout, tsim ob ImageViews, ib qho rau txhua ⁢ duab koj xav overlay. Nco ntsoov tias koj muab lawv tus ID tshwj xeeb kom koj tuaj yeem siv lawv los ntawm cov cai.

Thaum cov duab nyob rau hauv qhov chaw, koj tuaj yeem tswj lawv txoj haujlwm siv layout_width, layout_height, layout_margin, layout_alignParentStart attributes, thiab lwm yam. Koj tuaj yeem kho cov txiaj ntsig no raws li koj xav tau kom ua tiav cov txiaj ntsig xav tau Ntxiv rau, nws tuaj yeem siv cov txiaj ntsig pom tseeb siv cov khoom siv alpha, uas nyob ntawm 0 (tag nrho pob tshab) mus rau 1 (opaque).

Este qauv code muab koj lub hauv paus tsim nyog rau overlay dluab ntawm Android. Nco ntsoov⁢ tias⁤ koj tuaj yeem kho nws raws li koj qhov yuav tsum tau ua thiab tshawb xyuas cov txheej txheem sib txawv kom ua tiav cov txiaj ntsig nyuaj dua. Muaj kev lom zem sim nrog cov khaubncaws sab nraud povtseg thiab tsim cov teebmeem pom kev zoo nkauj hauv koj cov apps hauv Android!

- Duab Overlay Customization thiab Kho

Hauv Android, koj tuaj yeem hloov kho thiab kho cov duab overlays kom ua tiav qhov pom kev zoo nkauj hauv koj cov apps. Duab overlaying tso cai rau koj tso ib daim duab rau saum lwm tus, tsim cov khaubncaws sab nraud povtseg thiab muab lub peev xwm los sib xyaw cov duab sib txawv. Hauv tsab ntawv no, peb yuav piav qhia koj yuav ua li cas thiaj ua tiav qhov no siv HTML thiab Java code.

Yuav pib, koj yuav tsum muaj cov dluab koj xav kom overlay. Npaj thiab khaws cia rau hauv koj lub cuab yeej Android Thaum koj muaj lawv, koj tuaj yeem siv cov ntsiab lus HTML ntxiv cov duab rau koj lub app. Koj tuaj yeem ⁤ siv cov duab tags⁢ HTML () thiab muab lawv ⁤an ID kom muaj peev xwm tswj tau lawv hauv Java code. Koj tuaj yeem siv ⁢CSS cov qauv los tswj ⁤ txoj haujlwm thiab qhov loj ntawm cov duab.

Hauv Java ⁢code⁢, koj tuaj yeem ua haujlwm nrog IDs ⁢ muab rau cov duab hauv HTML los siv cov overlay. Siv txoj hauv kev zoo li setImageBitmap(), koj tuaj yeem thauj cov duab los ntawm koj cov ntaub ntawv khaws cia thiab muab lawv rau ImageView. Tom qab ntawd, koj tuaj yeem siv txoj hauv kev xws li setX() thiab setY() los tso cov duab ntawm lub vijtsam. Tsis tas li ntawd, koj yuav muaj kev xaiv ntxiv pob tshab rau cov duab siv txoj hauv kev xws li setAlpha().

Thaum kawg, koj tuaj yeem kho qhov overlay ntawm cov duab raws li koj xav tau. Koj tuaj yeem siv txoj hauv kev xws li setLayoutParams() txhawm rau hloov qhov loj ntawm cov duab Koj tuaj yeem ntxiv cov teebmeem sib xyaw siv cov txheej txheem xws li ColorMatrix(), uas yuav tso cai rau koj los sib xyaw cov xim ntawm cov duab Tsis tas li ntawd, koj tuaj yeem ⁢ ntxiv ⁤ sib cuam tshuam cov xwm txheej. yuav ua li cas Nyem hauv ib daim duab kom pom lossis zais lwm daim duab overlay. Nrog me ntsis kev sim, koj yuav muaj peev xwm tsim stunning pom teebmeem siv cov duab overlay ntawm Android.

- Kev txiav txim siab rau kev ua tau zoo thiab ⁢ optimization ntawm⁢ duab overlay

Duab overlay yog ⁢ thev naus laus zis⁤ feem ntau siv hauv Android daim ntawv thov kev txhim kho kom ua tiav cov txiaj ntsig zoo nkauj ⁤ thiab txhim kho cov neeg siv kev paub. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tau xav txog qee qhov kev txiav txim siab txhawm rau txhim kho kev ua haujlwm ntawm qhov kev ua haujlwm no. Nov yog qee qhov tseem ceeb uas yuav tsum nco ntsoov:

1. Qhov loj ntawm cov duab: Nws yog ib qho tseem ceeb los xyuas kom meej tias cov duab yuav tsum tau muab tso rau ntawm qhov loj me kom tsis txhob muaj teeb meem kev ua haujlwm. Yog tias cov duab loj dhau lawm, cov cuab yeej yuav tsum tau ua ntau dua thiab qhov no tuaj yeem ua rau kev ua haujlwm qeeb. Nws yog ib advisable mus resize thiab optimize cov duab ua ntej overlaying lawv.

2. Kev pab cim xeeb: Thaum overlaying dluab, nws yog ib qho tseem ceeb kom xav txog kev siv nco. Txhua daim duab uas siv yuav siv qee qhov cim xeeb, yog li sib tshooj ntau cov duab ib zaug tuaj yeem ua rau muaj teeb meem kev ua haujlwm vim tsis nco. Nws raug nquahu kom tso lub cim xeeb dawb thaum cov duab tsis xav tau ntxiv lawm siv txoj kev tsim nyog kom tsis txhob nco nco.

3. Yam khoom tsim: Lwm qhov tseem ceeb uas yuav tau xav txog yog qhov tsim ntawm cov khoom tsis tsim nyog thaum lub sij hawm overlay ntawm cov duab. ⁤Txhua lub sijhawm⁢ ib daim duab yog overlayed, ib qho tshiab ⁢object⁢ tuaj yeem tsim tau, uas tuaj yeem raug nqi ⁢ hauv ⁢ cov ntsiab lus ntawm kev ua haujlwm thiab kev siv peev txheej. Nws raug nquahu kom rov siv cov khoom uas twb muaj lawm tsis yog tsim cov tshiab, thaum twg los tau. Qhov no yuav pab txhim kho kev ua tau zoo thiab txo cov load ntawm qhov system.

-⁤ daws teeb meem tshwm sim thaum overlaying dluab ntawm⁤ Android

Kev daws teeb meem tshwm sim thaum overlaying dluab ntawm Android

Muaj ntau qhov kev sib tw thaum sim overlay cov duab hauv Android app. Hauv qab no yog cov kev daws teeb meem rau qee qhov teeb meem uas cov neeg tsim khoom yuav ntsib thaum siv cov haujlwm no:

1. Alignment thiab scale teeb meem: Thaum overlaying dluab, nws yog ib qho tseem ceeb kom ua tau raws li kev sib raug zoo thiab scaling kom tsis txhob pom distortions. Txhawm rau ua qhov no, nws raug nquahu kom siv HTML "style" tus cwj pwm thiab cov khoom sib xws CSS hauv cov duab keeb. Qhov no yuav tso cai rau koj los kho qhov loj thiab txoj hauj lwm ntawm txhua daim duab nyob rau hauv kev sib raug zoo rau lwm tus. Koj tseem tuaj yeem siv "cov qoob loo" hais kom ua los ntawm Android los cog qoob loo cov duab ua ntej overlaying lawv, kom ntseeg tau tias kev sib raug zoo thiab kev ntsuas.

2. Qhov teeb meem pob tshab: Lwm qhov teeb meem tshwm sim thaum overlaying dluab ntawm Android yog tswj lub pob tshab ntawm cov txheej. Yog tias ib qho ntawm ⁢ duab ⁤ muaj pob tshab lossis pob tshab, koj yuav tsum xyuas kom meej tias ⁤ nws tsis ploj thaum⁢ overlaying lawv. Txhawm rau ua qhov no, koj tuaj yeem siv "alpha" tus cwj pwm hauv Android los "kho qhov opacity ntawm txhua daim duab" thiab tso cai rau cov khaubncaws sab nraud povtseg kom pom los ntawm sab saud. Tsis tas li ntawd, nws raug nquahu kom ua haujlwm nrog cov duab tawm tswv yim uas txhawb cov pob tshab, xws li PNG, thiab siv cov cuab yeej kho duab los teeb tsa cov pob tshab.

3. Qhov teeb meem kev ua haujlwm: Overlaying dluab tuaj yeem muaj kev cuam tshuam rau kev ua haujlwm ntawm daim ntawv thov, tshwj xeeb tshaj yog tias koj ua cov haujlwm overlay complex los yog tuav cov duab siab. ⁢ Txhawm rau txhim kho kev ua tau zoo, koj tuaj yeem siv lub tsev qiv ntawv Android Glide, uas muab cov duab ua haujlwm tau zoo thiab ua haujlwm caching. Tsis tas li ntawd, nws raug nquahu kom siv kev tswj hwm kev nco tsim nyog, tso cov peev txheej los ntawm cov duab uas tsis xav tau ntxiv lawm thiab siv cov tswv yim zoo, xws li kev ntsuas duab. nyob rau tom qab, kom tsis txhob muaj kev sib tsoo lossis qeeb hauv cov neeg siv interface.

Thaum ntsib cov duab overlay hauv Android app, nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo mloog. txoj kev zoo Cov teeb meem ntawm kev sib tw thiab kev ntsuas, pob tshab, thiab kev ua haujlwm los ntawm kev ua raws li cov kev daws teeb meem uas tau hais los saum toj no, cov neeg tsim khoom tuaj yeem xyuas kom meej tias cov duab tau muab tso rau hauv qhov tsim nyog thiab cov kev ua haujlwm xav tau ua tiav yam tsis muaj kev cuam tshuam qhov pom kev zoo lossis kev ua haujlwm ntawm koj daim ntawv thov.