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LOOKIE_FRONT_2023

2023 ver.

Week 07. OkHttp()์— ๋Œ€ํ•˜์—ฌ ์•Œ์•„๋ณด์ž.

  1. OkHttp์™€ Retrofit ์ฐจ์ด ์กฐ์‚ฌํ•˜๊ธฐ
  2. OKHttp์— ๋Œ€ํ•œ ์กฐ์‚ฌํ•˜๊ณ  ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ ์˜ฌ๋ฆฌ๊ธฐ
  • ์ด๋ฒˆ ์ฃผ๋Š” ์‰ฌ์–ด๊ฐ€๋Š” ๊ฐœ๋… ์ •๋ฆฌ ๊ณผ์ œ!(๊ณผ์ œ ๊ด€๋ จ ํŒจ์ŠคํŠธ ์บ ํผ์Šค ๊ฐ•์˜ ๋“ค์„ ํ•„์š”์—†์Šต๋‹ˆ๋‹ค.)

Week6. ์•ˆ๋“œ๋กœ์ด๋“œ Network ์‹ค์Šต

  1. ํŒจ์ŠคํŠธ ์บ ํผ์Šค 05 Essential 69๊ฐ•๊นŒ์ง€ ์ˆ˜๊ฐ•
  2. ํŒจ์ŠคํŠธ ์บ ํผ์Šค ๊ฐ•์˜ ๋‚ด์— ์žˆ๋Š” Network 61~67๊ฐ• ์‹ค์Šต ํ™”๋ฉด ์บก์ณ ๋ฐ ๊ฐ•์˜ ๋‚ด์šฉ ์ •๋ฆฌ Issue ์— ์˜ฌ๋ฆฌ๊ธฐ
  • ์•ˆ๋“œ๋กœ์ด๋“œ ๋„คํŠธ์›Œํฌ ๊ด€๋ จ ๊ฐœ๋…

Week5. ์•ˆ๋“œ๋กœ์ด๋“œ RecyclerView ์‹ค์Šต

  1. ํŒจ์ŠคํŠธ ์บ ํผ์Šค 05 Essential 50๊ฐ•๊นŒ์ง€ ์ˆ˜๊ฐ•(Tablayout, Pager๊นŒ์ง€)
  2. ๋‚˜๋งŒ์˜ ์—ฌ๋ฆ„๋ฐฉํ•™ ๊ณ„ํšํ‘œ ์ž‘์„ฑํ•˜๊ธฐ
    • ๊ธฐ๋Šฅ 1. Recycler View ๋กœ ๊ณ„ํšํ‘œ ๋‚ ์งœ, ๋‚ด์šฉ์ด ๋ณด์ด๋„๋ก ํ•จ

    • ๊ธฐ๋Šฅ 2. ์ƒˆ๋กœ์šด ๊ณ„ํš์„ ์ถ”๊ฐ€ํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•จ

    • class file 3๊ฐœ (main, plan, planAdapter), XML file 3๊ฐœ (main, planview, dialogview)

      `class | main: (-)
              plan: ๊ณ„ํš์˜ ์ •๋ณด (๋‚ ์งœ, ๋‚ด์šฉ)์„ ๋‹ด์„ ํด๋ž˜์Šค
              planAdapter: main์˜ RecyclerView์— ์žฅ์ฐฉํ•  CustomAdapter
      XML   | main: Button 1๊ฐœ,RecyclerView 1๊ฐœ
              planview: TextView 2๊ฐœ (๋‚ ์งœ, ๋‚ด์šฉ)
              dialogview: EditText 3๊ฐœ (๋‚ ์งœ, ๋‚ด์šฉ)`
      
    • ์„ค๋ช… :

      `mainํ™”๋ฉด์˜ Button ํด๋ฆญ ์‹œ Dialog ๋ณด์—ฌ์ง„๋‹ค.
      Dialog๋‚ด์—์„œ 2๊ฐœ์˜ ๊ฐ’ ์ž…๋ ฅํ›„ ์ถ”๊ฐ€ ๋ฒ„ํŠผ ํด๋ฆญ ์‹œ mainํ™”๋ฉด์— ํ•ด๋‹น ๊ณ„ํš์ •๋ณด๊ฐ€ ์ถ”๊ฐ€๋˜๊ณ  Dialog๊ฐ€ ์ข…๋ฃŒ๋œ๋‹ค.
      ์ทจ์†Œ ๋ฒ„ํŠผ ํด๋ฆญ ์‹œ ์•„๋ฌด๋Ÿฐ ๋™์ž‘์—†์ด Dialog๊ฐ€ ์ข…๋ฃŒ๋œ๋‹ค.`
      
    • ์กฐ๊ฑด :

      `๊ณ„ํš ์ •๋ณด๋Š” ํ•ญ์ƒ ๋ฆฌ์ŠคํŠธ์˜ ๊ฐ€์žฅ ์œ„์— ์ถ”๊ฐ€๋œ๋‹ค. Dialog์˜ editText๊ฐ’๋“ค์ด ์ฑ„์›Œ์ง€์ง€ ์•Š์€ ๊ฒฝ์šฐ๋Š” ๊ณ ๋ คํ•˜์ง€ ์•Š๋Š”๋‹ค.(์˜ˆ์™ธ์ฒ˜๋ฆฌ ํ•„์š”์—†์Œ)`
      
  • Dialog๊ฐ€ ์–ด๋ ค์šด ๊ฒฝ์šฐ https://juyeop.tistory.com/7 ์‚ฌ์ดํŠธ ์ฐธ๊ณ ํ•˜์—ฌ ๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•ด๋„ ๋ฉ๋‹ˆ๋‹ค.

Week4. ์•ˆ๋“œ๋กœ์ด๋“œ Fragment ์‹ค์Šต

  1. ํŒจ์ŠคํŠธ ์บ ํผ์Šค 05 Essential 24๊ฐ•๊นŒ์ง€ ์ˆ˜๊ฐ•
  2. MainActivity์—์„œ ๋ฒ„ํŠผ ์ œ์–ด๋กœ ์—ฐ๊ฒฐ๋œ Fragment ๋„์šฐ๊ธฐ ๊ธฐ๋Šฅ ๊ตฌํ˜„ํ•˜๊ธฐ
    • ๋ฒ„ํŠผ ์ตœ์†Œ 4๊ฐœ โ†’ fragment 4๊ฐœ ๊ตฌํ˜„
    • 4๊ฐœ์˜ fragment ๋””์ž์ธ ๋‹ค ๋‹ค๋ฅด๊ฒŒ ํ•  ๊ฒƒ
  3. ํŒŒ์ผ pull requestํ•˜๊ณ  issue์— ๋นŒ๋“œ๋œ ํ™”๋ฉด์„ ์บก์ณํ•ด์„œ ์˜ฌ๋ฆฌ๊ธฐ

**Week3. ์•ˆ๋“œ๋กœ์ด๋“œ ์•กํ‹ฐ๋น„ํ‹ฐ ๋ฐ Intent ์‹ค์Šต. **

  1. 05 Essential ์ˆ˜๊ฐ• 19๊ฐ•๊นŒ์ง€ ์ˆ˜๊ฐ•
  2. Activity ์—์„œ ๋ฒ„ํŠผ์„ ๋ˆ„๋ฅผ ์‹œ ๋‹ค๋ฅธ Activity๋กœ ์ „ํ™˜ ๋˜๋Š” ๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•˜์—ฌ ๋นŒ๋“œ

ex)

1) MainActivity - A,B,C ๋ฒ„ํŠผ ์ƒ์„ฑ - A๋ฒ„ํŠผ ํด๋ฆญ ์‹œ AActivity๋กœ ์ด๋™ - B๋ฒ„ํŠผ ํด๋ฆญ ์‹œ BActivity๋กœ ์ด๋™ - C๋ฒ„ํŠผ ํด๋ฆญ ์‹œ CActivity๋กœ ์ด๋™ 2) AActivity - ๋’ค๋กœ ๊ฐ€๊ธฐ ๋ฒ„ํŠผ ์ƒ์„ฑ โ†’ ํด๋ฆญ ์‹œ MainActivity๋กœ ์ด๋™ 3) BActivity - ๋’ค๋กœ ๊ฐ€๊ธฐ ๋ฒ„ํŠผ ์ƒ์„ฑ โ†’ ํด๋ฆญ ์‹œ MainActivity๋กœ ์ด๋™ 4) CActivity - ๋’ค๋กœ ๊ฐ€๊ธฐ ๋ฒ„ํŠผ ์ƒ์„ฑ โ†’ ํด๋ฆญ ์‹œ MainActivity๋กœ ์ด๋™

  1. ์กฐ๊ฑด : ์•กํ‹ฐ๋น„ํ‹ฐ ๊ฐ„ Intent๋กœ ์—ฐ๊ฒฐํ•  ๊ฒƒ.
  2. ํ”„๋กœ์ ํŠธ ํŒŒ์ผ์„ fork๋œฌ ์ž์‹ ์˜ ๋ ˆํฌ์ง€ํ† ๋ฆฌ์— pushํ›„ ์Šคํ„ฐ๋”” ๋ ˆํฌ์ง€ํ† ๋ฆฌ/์ž์‹ ์˜ LOOKIE ๋ธŒ๋žœ์น˜์— Pull request๊นŒ์ง€ ํ•˜๊ธฐ

Week 2) ์•ˆ๋“œ๋กœ์ด๋“œ UI.

  1. ํŒจ์ŠคํŠธ ์บ ํผ์Šค 04 ์•ˆ๋“œ๋กœ์ด๋“œ Essential - UI ๋ถ€๋ถ„ ํ•™์Šตํ•˜๊ธฐ (ํ•ต์‹ฌ ๊ฐœ๋… : Scrollview, Imageview, Linearlayout)
  2. ์ž์‹ ์˜ ์ทจํ–ฅ or ์นœํ•œ์นœ๊ตฌ๊ฐ€ ๋‹ด๊ธด Image๋ฅผ ๋“ฑ๋กํ•˜๊ณ  Scroll ํ•˜์—ฌ Image๋ฅผ ๋ณผ ์ˆ˜ ์žˆ๋„๋ก ๋งŒ๋“ค๊ธฐ
  3. build ํ•œ ํ™”๋ฉด ์บก์ณํ•ด์„œ issue์— ์˜ฌ๋ฆฌ๊ธฐ

Week 1) Kotlin์ž…๋ฌธ ๋ฐ Git ์‹ค์Šต.

  1. ํŒจ์ŠคํŠธ ์บ ํผ์Šค 03 ์•ˆ๋“œ๋กœ์ด๋“œ Essential - Kotlin ๋ถ€๋ถ„ ํ•™์Šตํ•˜๊ธฐ
  2. Kotlin์˜ ์žฅ์ ์— ๋Œ€ํ•ด ์ ์–ด๋ณด์ž.
  3. Kotlin์˜ ๊ธฐ๋ณธ ๋ฌธ๋ฒ•์„ ์ •๋ฆฌํ•ด๋ณด์ž.
  • ๋ณ€์ˆ˜
  • ์ž๋ฃŒํ˜•
  • ํ•จ์ˆ˜
  • ๋ถ„๊ธฐ๋ฌธ
  • ๋ฐ˜๋ณต๋ฌธ.
  1. Github 2022 Lookie Front ๋ฅผ fork ํ•ด์„œ ์ž์‹ ์˜ ๋ ˆํฌ์ง€ํ† ๋ฆฌ์— pushํ•ด๋ณด๊ธฐ

Week 0) ํ”„๋ก ํŠธ ์Šคํ„ฐ๋”” OT.

  1. 8์ฃผ ์ปค๋ฆฌํ˜๋Ÿผ ์†Œ๊ฐœ ๋ฐ ํŒจ์ŠคํŠธ์บ ํผ์Šค ์•„์ด๋”” ๊ณต์œ 
  2. GitHub ์‚ฌ์šฉ๋ฒ• ๊ต์œก
  3. ์Šคํ„ฐ๋”” ์ง„ํ–‰ ๋ฐฉ๋ฒ• ์†Œ๊ฐœ ใ…ก ใ…กใ…ก

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[์‹œ์Šน์—ฐ] Week 1) Kotlin์ž…๋ฌธ ๋ฐ Git ์‹ค์Šต ๊ณผ์ œ ์ œ์ถœ

  1. Kotlin์˜ ์žฅ์ 
    Kotlin์€ ์•ˆ๋“œ๋กœ์ด๋“œ ์•ฑ ๊ฐœ๋ฐœ, ์„œ๋ฒ„ ์‚ฌ์ด๋“œ ๊ฐœ๋ฐœ ๋“ฑ ๋‹ค์–‘ํ•œ ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ์— ์‚ฌ์šฉ๋˜๋Š” ์–ธ์–ด๋กœ,
    Java๋ณด๋‹ค ๊ฐ„๊ฒฐํ•˜๊ณ  ํ‘œํ˜„๋ ฅ์ด ๋†’์œผ๋ฉฐ ์œ ์ง€ ๋ณด์ˆ˜๊ฐ€ ์šฉ์ดํ•œ ์ฝ”๋“œ ๊ฐœ๋ฐœ์„ ์ง€์›ํ•œ๋‹ค.
    ๋˜ํ•œ Java์™€์˜ ํ˜ธํ™˜์„ฑ์ด ๋›ฐ์–ด๋‚˜๊ธฐ ๋•Œ๋ฌธ์— Kotlin์„ ๊ธฐ์กด Java project์—์„œ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๊ณ , Java ์ฝ”๋“œ์—์„œ๋„ Kotlin ์ฝ”๋“œ๋ฅผ ํ˜ธ์ถœํ•  ์ˆ˜ ์žˆ๋‹ค. ๋”ฐ๋ผ์„œ ์ž๋ฐ”์— ์ต์ˆ™ํ•œ ๊ฐœ๋ฐœ์ž๋“ค์—๊ฒŒ ์œ ์šฉํ•˜๋‹ค.
    ๊ทธ๋ฆฌ๊ณ  Kotlin์˜ Null ์•ˆ์ „ ๊ธฐ๋Šฅ์„ ํ†ตํ•ด Null ํฌ์ธํ„ฐ ์˜ˆ์™ธ๋ฅผ ๋ฐฉ์ง€ํ•˜๋Š” ๋ฐ์— ๋„์›€์ด ๋œ๋‹ค.

  2. Kotlin์˜ ๊ธฐ๋ณธ ๋ฌธ๋ฒ•
    -๋ณ€์ˆ˜
    ๋ณ€์ˆ˜ ์„ ์–ธ์€ var(variable) / val(value) ๋ณ€์ˆ˜๋ช… = ๊ฐ’
    ์„ ํ†ตํ•ด ์„ ์–ธํ•  ์ˆ˜ ์žˆ๋‹ค. Variable์€ ๊ฐ’์„ ์ž์œ ๋กญ๊ฒŒ ๋ณ€๊ฒฝํ•  ์ˆ˜ ์žˆ์œผ๋‚˜, Value๋Š” ๊ฐ’์„ ํ•œ ๋ฒˆ ๋„ฃ์œผ๋ฉด ๋ฐ”๊ฟ€ ์ˆ˜ ์—†๋‹ค.

๋ณ€์ˆ˜ ๋’ค์— '?'๋ฅผ ์‚ฌ์šฉํ•˜๋ฉด Null ๊ฐ’์„ ๊ฐ€์งˆ ์ˆ˜ ์žˆ๋Š” ๋ณ€์ˆ˜๊ฐ€ ๋œ๋‹ค.

-์ž๋ฃŒํ˜•
์ •์ˆ˜ํ˜• -> Long > Int > Short > Byte
์‹ค์ˆ˜ํ˜• -> Double > Float
๋ฌธ์ž -> Char
๋ฌธ์ž์—ด -> String
๋…ผ๋ฆฌํ˜•(T/F) -> Boolean

Kotlin์—์„œ๋Š” ์ž๋ฃŒํ˜•์„ ์ •ํ•˜์ง€ ์•Š์œผ๋ฉด ์Šค์Šค๋กœ ์ž๋ฃŒํ˜•์„ ์ •ํ•œ๋‹ค.

-ํ•จ์ˆ˜
ํ•จ์ˆ˜๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์ด ์„ ์–ธํ•œ๋‹ค.
fun ํ•จ์ˆ˜๋ช… (๋ณ€์ˆ˜๋ช…: ํƒ€์ž…, ๋ณ€์ˆ˜๋ช…: ํƒ€์ž…, โ€ฆ ) : ๋ฐ˜ํ™˜ํ˜• {
ํ•จ์ˆ˜ ๋‚ด์šฉ
return ๋ฐ˜ํ™˜๊ฐ’
}

return first * second * third์™€ ๊ฐ™์ด
return์— ์—ฐ์‚ฐ์„ ๋„ฃ์–ด๋„ ๋œ๋‹ค.

-๋ถ„๊ธฐ๋ฌธ

//if

if(์กฐ๊ฑด){
๋‚ด์šฉ
} else {
๋‚ด์šฉ
}

ํ˜น์€

var hamster: a
if (a < b) hamster = b

ํ˜น์€

val hamster = if (a > b) a else b (์ฒ˜๋ฆฌ ๊ตฌ๋ฌธ์ด ํ•œ ์ค„์ด์–ด์•ผ ํ•จ)

//when()

when (x) {
1 -> print(โ€œx == 1โ€)
2 -> print(โ€œx == 2โ€)
else -> {
print(โ€œx is neither 1 nor 2โ€)
}
}

-๋ฐ˜๋ณต๋ฌธ

//for()

  • ๊ตฌ๋ถ„์ž๋กœ๋Š” โ€˜inโ€™์„ ์“ด๋‹ค.

for (i in 1..9) { // 0~9๊นŒ์ง€ ์ด 10๋ฒˆ ๋ฐ˜๋ณต
println(i)
}

for (i in 10 downTo 0 step 1){ //10์—์„œ 0๊นŒ์ง€ 1์”ฉ ๊ฐ์†Œ
println(i)
}

//while()

while(์กฐ๊ฑด){
์ˆ˜ํ–‰
}

while (x > 0){
xโ€”
}

do{
val y = Hamster()
} while (y != null)

while๊ณผ do while์˜ ์ฐจ์ด
do while์€ ์กฐ๊ฑด์ด ๋งŒ์กฑํ•˜์ง€ ์•Š์•„๋„ ํ•œ ๋ฒˆ์€ ์‹คํ–‰ํ•˜๋„๋ก ์„ค๊ณ„๋จ.

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