Simple ImageViewYouTube↗  IA↗(long shot)
Education  150K views 82 likes 1 dislikes   26 May 2015
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we played around a little bit with
Biz TextView bilan ba‘zi metodlarni sinab ko‘rdik.
TechSoup and the other view we want to learn about now to make our birthday
Endi biz o‘rganmoqchi bo‘lgan boshqa bir view bu mening tug‘ilgan kunim
card is the image view now here's the
kartasiga ImageView yaratish.
XML for image view let's look at the
Mana bu yerda ImageView uchun XML kod berilgan.
lines one at a time the XML element
Keling, biroz vaqt qatorlarga qarab chiqamiz.
starts with an open angle bracket thing
XML elementi ochiq burchakli qavs bilan boshlanadi
and then the name of the view and then the list of attributes
Undan keyin ko‘rinishning nomi, [TOVUSH] keyin esa atributlar ro‘yxati,
pew-pew pew-pew then it's followed by a
[Tovush].
forward slash and then a closing angle
keyin yotiq chiziq bilan ochiq burchakli qavs keladi.
bracket boom when we wrote the XML for text view it displayed text on the
[TOVUSH] Bum. Biz TextView uchun XML yozganimizda, u ekranda matnni tasvirladi.
screen so now when we write image view here it displays an image on the screen
Endi esa, biz mana bu yerda ImageView ni yozganimizda, u ekranda rasmni ko‘rsatadi.
the first attribute is something we
Birinchisi biz oldin ko‘rmagan qandaydir atribut.
haven't seen before it says Android source equals at drawable slash cake this is saying that
U yerda android:src teng drawable/cake deb yozilgan.
the source for this image should be found in this file here the file name is
Bu yerda ko‘rsatilishicha, bu rasm uchun manba mana bu fayldan topilishi kerak.
called cake we use the @ symbol to say
O‘sha faylning nomi cake .
that we're referencing a resource in the
Android dasturidagi biron bir manbaga ishora qilayotganimizni ko‘rsatish uchun
Android app and drawable is the resource
kuchukcha belgisidan va manba turi bo‘lgan drawable dan foydalanamiz.
type a drawable is like a graphic that will be shown on screen and Android and
drawable bu Android ekranida ko‘rsatilib turadigan grafikka o‘xxshaydi.
again cake is the file image name we
Yana bir bor, cake bu rasm turgan faylning nomi.
don't include the file extension but you
Bu yerda faylning kengaytmasini keltirib o‘tmaymiz.
don't need to say if it's a JPEG or a
Rasm JPEG yoki PNG formatdaligini yozishingiz shart emas.
PNG image just say the file name if
Shunchaki fayl nomini ko‘rsatib o‘tsangiz bo‘ldi.
you're wondering where this image came
Agar siz bu rasm qayerdan kelib qolganiga qiziqayotgan bo‘lsangiz, biz buni XML Vizualizator da
from well we handle this a little bit differently in the XML visualizer compared to the app but basically we
ushbu dasturga qaraganda biroz boshqacharoq qilib bajaramiz.
load it in a bunch of images beforehand
Lekin asosan, biz bir muncha rasmlarni oldindan yuklab qo‘ydik,
so that you can use them to practice in the XML visualizer when you build your
shunday ekan, siz ular bilan XML Vizualizator da mashq qilaversangiz bo‘ladi.
app in Android studio you're going to
Siz Android Studio da dastur yaratayotganingizda,
have to add images manually into your app into the drawable folder now if I
dasturga rasmlarni drawable faylga qo‘lda qo‘shib chiqasiz.
try to reference an image that doesn't
Agar hozir men mavjud bo‘lmagan biron rasmga ishora qilmoqchi bo‘lsam,
exist for example the toys image does not
misol uchun, o‘yinchoqlar rasmi mavjud emas.
exist then there will be an error because toys is not a valid image so
U holda, toys yaroqli rasm bo‘lmagani uchun xatolik ro‘y beradi.
make sure that you only reference images that are available so let's change it
Shuning uchun siz yaroqli bo‘lgan rasmlargagina ishora qilayotganingizga amin bo‘ling.
back by hitting undo now we have the
Demak, orqaga qaytish tugmasini bosish orqali buni to‘g‘rilab qo‘yamiz.
width and height which are set to be
Hozirda bizda wrapped content ga joylashtirilgan kenglik va balandlik bor.
wrapped content so that the image view is only as big as the cake image inside
Shuning uchun ImageView ning kattaligi o‘sha cake rasmining kattaligicha bo‘la oladi.
of it lastly we have this attribute called Android scale type and it's set
Nihoyat, Android:scaledType deb nomalanadigan mana bu atribut mavjud
to be Center scale type tells the device
va u markazga qo‘yish uchun ishlatiladi. O‘lchov turi ImageView ning chegarasiga qarab qurilmaga o‘lchovni
how to scale up or scale down the image based on the bounds of the image view
qanaqa qilib oshirishni yoki kamayatirishni aytib turadi.
let's see what that looks like now you
Keling bu qanaqa ko‘rinishini ko‘zdan kechiramiz.
can see the cake image showing up on the
Hozirda qurilmada tort rasmi ko‘rsatilib turganini ko‘rayapsiz.
device the cake image is actually pretty large and it's larger than the screen
Tort rasmi aslida juda ham katta, va u ekrandan kattaroq bo‘lib turibdi.
sighs so when we say scale type it
Demak, biz scaleType ni ishlatsak,
doesn't change the size of the image it just centers it so we see that the cake
u rasmning o‘lchamini o‘zgartirmaydi, u shunchaki uni markazga olib kelib qo‘yadi.
image is actually really big but this is
Shuning qilib, biz ushbu tort rasmi kattaligini ko‘rib turibmiz,
the center of the cake image we can set
ammo bu tort rasmining o‘rtasi.
other values for scale type such as center crop this scales down the image
Biz scaleType uchun boshqa qiymatlar ham bera olamiz, misol uchun centerCrop .
to fit the height and width of the view
Bu o‘lchov ko‘rinishning balandligi va eniga moslash uchun rasmning o‘lchovlarini kamaytiradi.
in this case we're constrained by the sides of the screen we also maintain the
Bu holatda, biz ekranning tomonlari bilan cheklanganmiz.
aspect ratio of the original image so it
Biz yana rasm buzilib ketmasligi uchun
doesn't get distorted
uning tomonlari nisbatini saqlab qolamiz.
once we scale it down we also Center the
Bir marta o‘lchovni kamaytirgandan keyin, biz rasmni yana markazlashtiramiz,
image and then crop it so that it fits this view size when displaying
va keyin bu ViewSize ga mos kelishi uchun uni kesamiz.
photographs I like to use center crop
Fotosuratlarni tasvirlayotganda men markazidan kesib olishni afzal ko‘raman.
this is because it's typically okay to crop off the edges of the photograph in
Bu fotosuratlarning mana bu chekkalarini chetki ko‘rinishga
order to achieve this edge to edge look
keltirish yaxshi deb o‘ylaganim uchundir balki.
when images go edge to edge without any
Biz rasmlarni hech qanaqangi oq yoki qanaqangidir chegaralarsiz chetidan chekka chiqarilsa,
white border or anything this is what we call a full bleed image we use a lot of
bunday rasmlar to‘laqonli rasmlar deb ataladi.
full bleed images in a material design guide here are some examples you see how
Material dizayn qo‘llanmasida biz juda ko‘plab to‘laqonli rasmlardan foydalanamiz. Bu yerda ba’zi misollar keltirilgan.
the images go edge to edge here and it
Bu yerda siz rasmlar qanday qilib chekkadan ckekkaga o‘tishini ko‘rishingiz mumkin,
gives it a nice immersive feel okay now
va u sizga ajoyib ruhlantirish beradi.
it's time for you to try specifically we
Yaxshi, harakat qilib ko‘radigan vaqtingiz keldi.
would love for you to be able to change
Biz sizni rasm ko‘rinishinig balandligi va enini o‘zgarmas
the height and width of the image view to be a fixed DP value try something
dp qiymatga o‘zgartira olishga qodir bo‘lishingizni xohlardik.
like 100 DP then change the scale type
100dp qilishga urinib ko‘ring.
between Center and center crop and you
Undan keyin center va center crop o‘rtasidagi o‘lchov turini o‘zgartiring,
can also adjust the height and width of the image accordingly for example what
va siz rasmning balandligi va kengligini ham mos ravishda o‘zgartira olasiz.
happens if you change the height and
Misol uchun, agar siz rasm ko‘rinishining bo‘yi va enini
width of the image view to be greater than the size of the device or what
qurilmaning tomonlaridan katta bo‘ladigan qilib o‘zgartirsangiz, nima bo‘ladi,
happens if you set the height and width to be something smaller than the size of
yoki qurilmaning o‘lchamlaridan kichik bo‘ladigan qilib o‘zgartirsangizchi unda nima bo‘ladi?
the device in those cases you may see different behavior for center and center
>> Bu holda siz center va center crop ning boshqacha
crop also try to change the image to
xususiyatini ko‘rishingiz mumkin. >> Bundan tashqari, rasmlar uchun yaroqli havolalarni tekshirib ko‘rib,
something else by checking the available images link
rasmni yana boshqacharoq narsaga o‘zgartirishga harakat qilib ko‘ring.
we've included a small version of the
Biz tort rasmining kichkina variantini berib o‘tganmiz,
cake image as well as a larger version so that you can try the different scale
shuningdek kattaroq variantini ham, demak, siz turli xildagi o‘lchovlar bilan urinib ko‘rsangiz bo‘ladi.
types we also included an Android icon
Biz yana Android ikonkasini ham kiritganmiz.
use the link below to get to the XML visualizer
XML Vizualizator ga o‘tish uchun quyidagi havoladan foydalaning.
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