1
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2
00:00:09,620 --> 00:00:11,550
>> FRED WIDJAJA: Kull dritt.

3
00:00:11,550 --> 00:00:12,600
Hi, kulħadd.

4
00:00:12,600 --> 00:00:19,450
Grazzi welcome għall
tgħaqqad miegħi fl dan is-seminar.

5
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Allura llum aħna ser tkun jitkellem dwar
kif jiżviluppaw apps għall Android,

6
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u partikolarment, aħna qed tmur biex
tkun qed tuża Android Studio sabiex

7
00:00:26,870 --> 00:00:29,490
biex jiżviluppaw apps tagħna.

8
00:00:29,490 --> 00:00:32,150
>> Allura kif inti kollha tista 'taf.

9
00:00:32,150 --> 00:00:36,750
Android użi Java, u hekk aħna ser tkun
għaddejjin introduzzjoni qasira

10
00:00:36,750 --> 00:00:39,860
fuq Java innifsu.

11
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So I know ħafna inti biss għandek
programmazzjoni esperjenza fl C. Allura

12
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li l-totalment multa, u li l-
għaliex Java huwa ħafna, ħafna

13
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simili għal C, b'differenzi ftit.

14
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>> Allura t-tipi in Java huma
iffissat fl-numru ta 'bytes.

15
00:01:00,040 --> 00:01:04,290
Allura fil-C, għandna xorts
u twal, u li dawn

16
00:01:04,290 --> 00:01:07,880
jvarjaw fin-numru ta 'bits
minn magna għall-magna.

17
00:01:07,880 --> 00:01:10,990
Fil Java, huwa diġà stabbilita bħala standard.

18
00:01:10,990 --> 00:01:16,320
Allura bytes jkollhom tmien bits, xorts
jkollhom 16-bits, u l-bqija u ibqa 'sejjer hekk.

19
00:01:16,320 --> 00:01:22,780
Għandna wkoll Chars, Booleans,
u wkoll sufruni u doubles.

20
00:01:22,780 --> 00:01:27,150
Allura l-mod inti programm fil
Java, huwa simili ħafna.

21
00:01:27,150 --> 00:01:30,150
Hekk per eżempju, għandna
għal-linji u filwaqt loops,

22
00:01:30,150 --> 00:01:39,090
u jekk u dikjarazzjonijiet inkella huma
eżattament l-istess kif inti tagħmel fil C.

23
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>> Dritt Kollha, sabiex il-ħaġa speċjali dwar
Java huwa li huwa għandu bħala għan orjentati.

24
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Issa, dak li huma oġġetti?

25
00:01:46,560 --> 00:01:49,220
Mela jekk inti tħares lejn l-
affarijiet ta 'madwarek, inti ser

26
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avviż li kull oġġett fid-dinja reali
għandha żewġ karatteristiċi komuni.

27
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U li hija li jkollhom l-istat
u dawn għandhom xi tip ta 'mġieba.

28
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>> Allura per eżempju, klieb
jkollhom stati li

29
00:02:02,510 --> 00:02:07,360
huma l-isem, kulur, razza, forsi
jekk il-kelb huwa bil-ġuħ jew le.

30
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U xi imgieba li l-klieb jkollhom
Ikun Barking, jew wagging denb,

31
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jew fetching ballun.

32
00:02:14,340 --> 00:02:18,120
Allura nistgħu wkoll japplikaw din
għal oġġetti inanimate.

33
00:02:18,120 --> 00:02:23,130
Hekk per eżempju, karozzi, huma għandhom
il-mudell, is-sena, il-veloċità max,

34
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u hekk u ibqa 'sejjer hekk.

35
00:02:25,500 --> 00:02:27,450
U dawn ikollhom xi mġieba.

36
00:02:27,450 --> 00:02:33,050
Per eżempju, l-aċċellerazzjoni, jew
ibbrejkjar, jew li jmorru fir-reverse.

37
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>> Allura Java joġġezzjona tentattiv għall-mudell
dan billi jkollu l-oqsma u l-metodi.

38
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Allura l-oqsma huma l-istati li
il Java oġġett jista 'jkollhom,

39
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filwaqt metodu jirrappreżenta l-
imġieba li Java oġġett ikollu.

40
00:02:51,440 --> 00:02:53,770
Allura meta I say metodi
u l-oqsma, I really

41
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jfissirx biss varjabbli u l-funzjonijiet.

42
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Dawn huma eżattament l-istess, ħlief
li dawn japplikaw għal ċertu oġġett.

43
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>> OK, hekk jimxu fuq għal klassijiet.

44
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Klassijiet Java huma simili l-
blueprints għal oġġett.

45
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Huma jgħidulek liema metodi
hija għandha, dak għelieqi hija għandha,

46
00:03:12,270 --> 00:03:17,750
u anke hawn, aħna għandna xi ħaġa
imsejħa modifikaturi aċċess għalihom

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aħna ser nikseb fil-waqt.

48
00:03:19,570 --> 00:03:26,930
Allura biex tiddikjara klassi Java, huwa
simili ħafna fil-sintassi għal Struct C.

49
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>> Here we tibda off ma Car klassi pubblika,
u mbagħad għandna Brace miftuħa u mbagħad

50
00:03:34,350 --> 00:03:38,800
xi numru ta 'oqsma li
inti tixtieq l-oġġett li jkollu.

51
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U allura hawnhekk għandna xi metodi,
u aħna għandna wkoll kostruttur oġġett.

52
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Issa dak dan l-oġġett kostruttur
ma huwa jirrakkonta l-oġġett,

53
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OK, I tixtieq li initialize din
joġġezzjonaw ma 'xi tip ta' oqsma.

54
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>> Allura hawnhekk, irridu kull Car
li jkollhom mudell u sena.

55
00:03:58,310 --> 00:04:01,480
Allura aħna għandna kostruttur
biss speċifikament

56
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għall-mudell u s-sena, u
dan se jiffissa l-kamp mudell

57
00:04:06,560 --> 00:04:12,510
li ċertu valur, u
qasam sena kif ukoll.

58
00:04:12,510 --> 00:04:16,019
>> Issa dwar l-aċċess
modifikaturi I kien jitkellem dwar.

59
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Hawnhekk għandna l-pubbliku u
modifikaturi aċċess privati.

60
00:04:21,560 --> 00:04:27,730
Allura inti tista 'taħseb ta' dan bħala
l RWX fid-direttorji tiegħek.

61
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Allura dawn jippermettu ċertu nies
biex jaqraw, u jkollhom aċċess

62
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għal dawn l-oqsma u l-metodi.

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>> Mela jekk jien ngħid dak il-mudell u l-
sena u l-veloċità huma privati,

64
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dan ifisser li oġġetti oħra ma tistax
tentattiv biex jaċċessaw l-oqsma dan l-oġġett tal-

65
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hemm privat.

66
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Imma meta I stabbiliti l-aċċess
modifikatur li jkun pubbliku,

67
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issa dan ifisser li oġġetti oħra
huma ħielsa għall-aċċess u anki

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użat l-metodi li huma definiti hawn.

69
00:05:00,770 --> 00:05:04,160

70
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>> Allura dan huwa l-bażiku
Oġġett karozza li għandi.

71
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Għandna l-taċċellera,
break, u l-metodi getSpeed.

72
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Biex dan il-punt, huwa kulħadd ċar fuq
Java oġġetti u kif jiddikjaraw lilhom?

73
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Kessaħ, id-dritt.

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Mela jekk inti tixtieq li tuża l-Java
joġġezzjonaw fi programm innifsu,

75
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allura nistgħu nużaw dan
kostruttur ġdida Car.

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Allura hawnhekk aħna qed tgħid irridu li jiddikjaraw
oġġett ġdid, li hija ta 'tip Car.

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U hawn huwa li tapplika
il-mudell u s-sena,

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li għandna definit fl
dan l-oġġett dritt hawn.

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>> Allura dan huwa wkoll ieħor
joġġezzjonaw, jekk tinnota.

80
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Huwa klassi għall-
programm prinċipali innifsu.

81
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U aħna għandna dan PSVM, jew pubblika
statiku null prinċipali, il-funzjoni,

82
00:06:04,660 --> 00:06:08,200
u l-bidu tagħha
punt ta 'programm tiegħek,

83
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simili għall-mejn
funzjoni fil-programm C tiegħek.

84
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Hawnhekk, nistgħu aċċess u
jużaw funzjonijiet tal-oġġett

85
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tuża l-dot u allura l-
isem funzjoni notazzjoni.

86
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U nistgħu anki jispeċifikaw
ċerti argumenti jew il-parametri

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għal dik il-funzjoni.

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>> OK, hekk issa jimxu fuq wirt.

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Allura oġġetti fid-dinja reali jista
jaqsmu l-istess karatteristiċi.

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Hekk per eżempju, hemm
tipi differenti ta 'biċikletti.

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Per eżempju, bike muntanji,
bikes belt, jew bikes tandem.

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00:06:47,280 --> 00:06:50,320
Allura dawn ikollhom din komuni
karatteristika li tkun a bike.

93
00:06:50,320 --> 00:06:55,740
>> U hekk bikes jista 'jkollhom żewġ roti u
dawn jista 'jkollhom maqbad, forsi anke

94
00:06:55,740 --> 00:06:58,750
dawl denb jew xi ħaġa bħal dik.

95
00:06:58,750 --> 00:07:04,930
Allura Java jagħtina din
setgħa li jirrappreżenta oġġetti

96
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li għandhom ċerta komuni
Karatteristiċi b'wirt.

97
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Issa, dak wirt ma, huwa
jgħaddi l-oqsma u l-metodi ta 'l-oġġett

98
00:07:18,370 --> 00:07:20,920
fuq oġġett wild.

99
00:07:20,920 --> 00:07:24,080
>> Għalhekk, per eżempju, jekk I
għandek karrozza, u għandu

100
00:07:24,080 --> 00:07:28,570
l-istat ta 'wara erbgħa
roti u steering wheel wieħed,

101
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allura nistgħu jgħaddi dan lil
ċerti tipi differenti ta 'karozzi.

102
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Per eżempju, aħna għandna l-
sedan, sportivi tal-karozzi, u SUV.

103
00:07:35,470 --> 00:07:38,940
Issa, dawn it-tliet differenti
tipi ta 'karozzi kieku xorta

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00:07:38,940 --> 00:07:42,050
jkollhom erba 'roti u wieħed
isteering wheel, iżda imbagħad dawn

105
00:07:42,050 --> 00:07:43,900
jista 'jkollhom ċerta
karatteristiċi speċjali,

106
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bħal li ħames siġġijiet u
a għal sedan, per eżempju.

107
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>> Allura biex jagħmlu użu minn din wirt
Karatteristika, nużaw dan jestendi keyword.

108
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Mela ftakar lura għall-Karozza
joġġezzjonaw li I definit preċedentement.

109
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Now I jiddefinixxu oġġett Sedan.

110
00:08:06,730 --> 00:08:09,930

111
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Allura dan l-oġġett Sedan ikollu l-
istess oqsma u funzjonijiet, jew metodi,

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li l-Karozza jkollhom.

113
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Iżda mbagħad, here I jispeċifika
ċerti funzjonijiet addizzjonali,

114
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per eżempju, is-sett
Numru ta 'passiġġieri

115
00:08:26,830 --> 00:08:29,150
u n-numru ta 'passiġġieri jiksbu.

116
00:08:29,150 --> 00:08:32,000
>> Hawnhekk, inti tista 'wkoll avviż
li nistgħu jiskarta metodi,

117
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u dan ifisser li aħna qed biss
li tissostitwixxi l-imġieba

118
00:08:34,840 --> 00:08:38,549
biex jaġixxi b'mod differenti f'ċerti każijiet.

119
00:08:38,549 --> 00:08:42,710
Għalhekk, per eżempju, nixtieq li
jistabbilixxu veloċità max għall-karozza tagħna.

120
00:08:42,710 --> 00:08:49,840
U biex tagħmel dan, I tiċċekkja jekk dan
veloċità imur fuq il-veloċità max.

121
00:08:49,840 --> 00:08:54,180
U jekk ma jiġrix dan, allura I-sejħa l-
klassi super "jaċċelleraw il-metodu.

122
00:08:54,180 --> 00:09:00,350
Allura dan huwa l-super.accelerate () sejħiet
il-klassi super "jaċċelleraw il-metodu.

123
00:09:00,350 --> 00:09:05,390

124
00:09:05,390 --> 00:09:09,940
>> Fl-aħħarnett, aħna qed tmur biex
jitkellmu dwar interfaces.

125
00:09:09,940 --> 00:09:18,090
Allura interfaces huma mod biex jesponu biss
ċerti metodi għall-dinja ta 'barra.

126
00:09:18,090 --> 00:09:19,980
Allura dawn qed simili tabella
tal-kontenut, u int

127
00:09:19,980 --> 00:09:25,900
tista 'taħseb minnhom bħala simili
il-fajls header C, biss

128
00:09:25,900 --> 00:09:33,680
Metodi bħal ma 'korpi vojta, u huma
tispeċifika liema l-oġġett jew il-klassi

129
00:09:33,680 --> 00:09:37,710
għandu jkollu, jew liema metodi
l-oġġett jew il-klassi irid ikollhom.

130
00:09:37,710 --> 00:09:41,360
>> Għalhekk, per eżempju, jekk I
jkollu interface Bicycle,

131
00:09:41,360 --> 00:09:46,530
u għandu tliet metodi differenti,
u hawn jekk I jimplimentaw dan interface,

132
00:09:46,530 --> 00:09:49,864
allura dan ifisser li din Bicycle
jeħtieġ li jimplimentaw l-istess tlieta

133
00:09:49,864 --> 00:09:51,530
Metodi li jien definiti fil-interface.

134
00:09:51,530 --> 00:09:57,076

135
00:09:57,076 --> 00:10:01,390
>> Sa dan il-punt, xi mistoqsijiet oħra?

136
00:10:01,390 --> 00:10:03,240
Dritt Kollha, berred.

137
00:10:03,240 --> 00:10:07,770
Allura dan kien qasir ħafna
u tutorja malajr dwar Java.

138
00:10:07,770 --> 00:10:14,560
Hemm mod aktar karatteristiċi u suġġetti fuq
Java, li inti tista 'attwalment tmur permezz.

139
00:10:14,560 --> 00:10:17,690
Per eżempju, hemm
ġeneriċi, hemm tipi ta 'data,

140
00:10:17,690 --> 00:10:19,780
hemm anke enums u l-għalf.

141
00:10:19,780 --> 00:10:23,400
Mela jekk inti tixtieq titgħallem aktar
dwar dan, do segwi dawn ir-rabtiet,

142
00:10:23,400 --> 00:10:25,840
u dawn ser jgħallmu inti aktar dwarhom.

143
00:10:25,840 --> 00:10:30,220
>> OK, iva, ejja jimxu fuq il-
laħam attwali tas-seminar,

144
00:10:30,220 --> 00:10:34,080
u li hija attwalment
Programmazzjoni Android.

145
00:10:34,080 --> 00:10:37,660
Allura qabel we attwalment
nikseb għall-ipprogrammar,

146
00:10:37,660 --> 00:10:40,800
I trid titkellem dwar xi lingwaġġ.

147
00:10:40,800 --> 00:10:46,980
Allura attività huwa
Mod Android ta 'tgħid

148
00:10:46,980 --> 00:10:52,870
huwa skrin wieħed
fi ħdan l-applikazzjoni.

149
00:10:52,870 --> 00:11:01,100
>> Għalhekk, per eżempju, jekk għandek Gmail
app, aħna għandna l-attività view emails.

150
00:11:01,100 --> 00:11:02,990
U mbagħad jekk inti ikklikkja
email ċerta, li

151
00:11:02,990 --> 00:11:08,850
se juru attività oħra fejn
it'sa attività ħsieb email.

152
00:11:08,850 --> 00:11:14,740
U allura għandna wkoll l compose
attività, jew l-attività jeditjaw messaġġ.

153
00:11:14,740 --> 00:11:18,380
U hekk l-attivitajiet huma
ġeneralment biss skrin wieħed

154
00:11:18,380 --> 00:11:21,800
fi ħdan il-rikors innifsu.

155
00:11:21,800 --> 00:11:28,410
>> Issa, l-opinjonijiet huma l-komponenti li jagħmlu
l-iskrin, jew l-attività nnifisha.

156
00:11:28,410 --> 00:11:34,430
Allura dawn jiġbed ċertu
ħaġa fil-iskrin tiegħek.

157
00:11:34,430 --> 00:11:37,840
Hekk per eżempju, din tista 'tkun
qasam tat-test, din tista 'tkun tikketta,

158
00:11:37,840 --> 00:11:40,090
din tista 'tkun kaxxa kontrolli.

159
00:11:40,090 --> 00:11:44,110
Għalhekk huwa ħafna tipi differenti ta 'fehmiet.

160
00:11:44,110 --> 00:11:47,780
Allura issa għandna buon,
u li l-messaġġ

161
00:11:47,780 --> 00:11:51,070
li tkun mgħoddija lill attività oħra.

162
00:11:51,070 --> 00:11:58,997
U huma fihom informazzjoni dwar
dak li tixtieq din l-attività biex tesegwixxi.

163
00:11:58,997 --> 00:12:00,830
Fl-aħħarnett, aħna għandna l-
fajl manifest, u li

164
00:12:00,830 --> 00:12:07,900
huwa fajl XML li tagħti telefon tiegħek
l-informazzjoni kollha dwar app tiegħek.

165
00:12:07,900 --> 00:12:12,230
Allura dak jinkludi l-verżjoni, u
l-attivitajiet li inti ser ikollok.

166
00:12:12,230 --> 00:12:17,480
>> OK, so ejja nibdew.

167
00:12:17,480 --> 00:12:21,460
Allura aħna qed tmur biex tkun
jużaw Android Studio.

168
00:12:21,460 --> 00:12:26,960
Mela jekk inti guys jkollhom din diġà
installat, tħossok liberu biex isegwu flimkien.

169
00:12:26,960 --> 00:12:29,790
Aħna ser jippruvaw u tibda fuq mill-bidunett.

170
00:12:29,790 --> 00:12:35,260
U hekk jien ser jippruvaw
u joħolqu proġett ġdid.

171
00:12:35,260 --> 00:12:40,370
U jien ser sejħa
proġett tiegħi Android 101.

172
00:12:40,370 --> 00:12:45,770
U hawn aħna tpoġġi l-isem tal-
proġett fil-qasam isem applikazzjoni.

173
00:12:45,770 --> 00:12:48,500
>> Kumpanija Dominju, inti ma
verament ikollhom għalfejn tinkwieta dwar dan.

174
00:12:48,500 --> 00:12:57,000
Dan huwa kemm Android
jidentifika l-applikazzjoni tiegħek.

175
00:12:57,000 --> 00:13:01,350
Allura inti għandek isem ta 'dominju, inti tista tip
fl-isem tad-dominju tiegħek ġewwa tal hemmhekk.

176
00:13:01,350 --> 00:13:05,370
Imma jekk inti ma, inti tista 'tħossok
liberu li tip fil xi ħaġa li trid.

177
00:13:05,370 --> 00:13:08,226
So here I biss tip frederickw.com.

178
00:13:08,226 --> 00:13:14,660
>> U mbagħad, finalment, I jagħżlu fejn
I tixtieq li taħżen proġett tiegħi fil.

179
00:13:14,660 --> 00:13:21,080
U jien ser biss jagħżlu desktop tiegħi.

180
00:13:21,080 --> 00:13:28,670
Allura Utenti, Frederick
Widjaja, u Desktop.

181
00:13:28,670 --> 00:13:31,340
OK.

182
00:13:31,340 --> 00:13:34,090
Imbagħad ikklikkja Next.

183
00:13:34,090 --> 00:13:39,630
Hawnhekk, jien ser jagħżlu l-
API minimu li għandhom jiġu appoġġjati.

184
00:13:39,630 --> 00:13:44,910
Allura f'dan il-każ, jien
ser jagħżlu API 15.

185
00:13:44,910 --> 00:13:51,530
U huwa multa jekk int attwalment biss
jagħżlu 4.4 li hija l-aħħar API.

186
00:13:51,530 --> 00:13:53,560
Jew 5, fil-fatt.

187
00:13:53,560 --> 00:13:57,714
Iżda mbagħad inti biss bżonn ninkwetaw dwar
li telefowns int verament ta 'sostenn,

188
00:13:57,714 --> 00:13:59,130
u li telefowns int immirar.

189
00:13:59,130 --> 00:14:04,230

190
00:14:04,230 --> 00:14:06,260
Ikklikkja Next.

191
00:14:06,260 --> 00:14:09,780
>> OK, hekk aħna jaslu għal dan il-
screen, u aħna qed biss

192
00:14:09,780 --> 00:14:15,110
ser tuża tinħoloq
attività permezz ta 'dan.

193
00:14:15,110 --> 00:14:19,890
Allura jien ser ikklikkja blank
attività u mbagħad Next.

194
00:14:19,890 --> 00:14:23,110
Aħna ser sejħa hija prinċipali
attività, naħseb li l-multa.

195
00:14:23,110 --> 00:14:27,800
Just tmur biex sejħa,
istampa Finish dritt hawn.

196
00:14:27,800 --> 00:14:36,250
Stenna għal din it-tagħbija, u hemm immorru.

197
00:14:36,250 --> 00:14:40,600
>> Allura hawnhekk aħna Avviż tlieta
folders differenti.

198
00:14:40,600 --> 00:14:44,290
Għandna l-folder manifest
li fih manifest tagħna.

199
00:14:44,290 --> 00:14:48,360
Jekk inti tiftaħ dan, aħna ser tara pakkett tagħna.

200
00:14:48,360 --> 00:14:54,000
Jew tidentifika kif Android
applikazzjoni tiegħek

201
00:14:54,000 --> 00:14:58,990
u allura għandna dan
tag applikazzjoni, li

202
00:14:58,990 --> 00:15:05,420
fih it-titolu ta 'applikazzjoni tagħna
kif ukoll l-ikona għall-applikazzjoni.

203
00:15:05,420 --> 00:15:08,050

204
00:15:08,050 --> 00:15:11,950
>> Nistgħu tmexxi effettivament din
applikazzjoni straight.

205
00:15:11,950 --> 00:15:14,600
Allura għaliex ma we tipprova tagħmel dan?

206
00:15:14,600 --> 00:15:16,310
Jien ser tuża Genymotion.

207
00:15:16,310 --> 00:15:22,150
Jekk inti miġjuba telefon tiegħek stess, inti tista '
kollegata ma 'u run jekk inti tixtieq li.

208
00:15:22,150 --> 00:15:31,213
Imma jien biss ser tuża
emulator, u jien ser tibda din.

209
00:15:31,213 --> 00:15:31,713
Ooh.

210
00:15:31,713 --> 00:15:41,030

211
00:15:41,030 --> 00:15:42,780
Well I think thats
ser tieħu filwaqt,

212
00:15:42,780 --> 00:15:49,580
hekk naħseb aħna ser biss tikseb straight
fis tispjega aktar dwar dan.

213
00:15:49,580 --> 00:15:56,200
Allura hawnhekk għandna l-direttorju Java, jew
fejn fajls sors tiegħek jinsabu.

214
00:15:56,200 --> 00:16:02,500
Hawnhekk għandna l-attività ewlenija innifsu.

215
00:16:02,500 --> 00:16:07,120
Tista 'tara li huwa
testendi l-klassi ta 'attività.

216
00:16:07,120 --> 00:16:12,750
Allura attività prinċipali tagħna huwa skrin
li se jkun fl-applikazzjoni tagħna.

217
00:16:12,750 --> 00:16:21,790
U allura hawnhekk aħna avviż li numru
tal-funzjonijiet huma auto iġġenerat għalina.

218
00:16:21,790 --> 00:16:26,037
Għandna l-funzjoni onCreate,
u li se tissejjaħ whenever--

219
00:16:26,037 --> 00:16:27,870
STUDENT: Do you mind
jagħmel it-test akbar?

220
00:16:27,870 --> 00:16:28,940
FRED WIDJAJA: OK, żgur.

221
00:16:28,940 --> 00:16:38,380

222
00:16:38,380 --> 00:16:41,640
I ser jippruvaw u jiżdied id-daqs tat-tipa.

223
00:16:41,640 --> 00:17:03,570

224
00:17:03,570 --> 00:17:06,490
Jaħsbu li għandha tkun tajba.

225
00:17:06,490 --> 00:17:07,020
Li tajba?

226
00:17:07,020 --> 00:17:09,480
>> STUDENT: Just ftit
ogħla, bħall 20 jew xi ħaġa.

227
00:17:09,480 --> 00:17:09,829
>> FRED WIDJAJA: 20?

228
00:17:09,829 --> 00:17:10,329
OK.

229
00:17:10,329 --> 00:17:17,380

230
00:17:17,380 --> 00:17:20,990
OK, id-dritt.

231
00:17:20,990 --> 00:17:24,740
Allura hawnhekk għandna onCreate
Metodu li kieku

232
00:17:24,740 --> 00:17:29,750
jissejjaħ meta l-attività tagħna
huwa maħluq fit-[? juru?].

233
00:17:29,750 --> 00:17:32,100
Għandna l-
onCreateOptionsMenu, u aħna ser

234
00:17:32,100 --> 00:17:38,370
tara li hemm attwalment
bar azzjoni, u mbagħad

235
00:17:38,370 --> 00:17:42,920
nistgħu żid ċerti oġġetti menu fuqha.

236
00:17:42,920 --> 00:17:45,710
U allura hawnhekk għandna l-
onOptionsItemSelected.

237
00:17:45,710 --> 00:17:52,210
Allura dan huwa simili avveniment semmiegħ, so
kull meta l-għażla fil-bar-azzjoni tagħna

238
00:17:52,210 --> 00:17:58,450
huwa għafast, dan
funzjoni se jiġu msejħa,

239
00:17:58,450 --> 00:18:01,270
u din għandha tingħadda bi
ċerta oġġett li kien għafast.

240
00:18:01,270 --> 00:18:05,670

241
00:18:05,670 --> 00:18:11,576
>> OK, jien ser see--
li mhux qed jaħdem sew.

242
00:18:11,576 --> 00:18:13,028
Ejja nippruvaw u tibda.

243
00:18:13,028 --> 00:18:16,416

244
00:18:16,416 --> 00:18:17,384
Oh qalb.

245
00:18:17,384 --> 00:18:21,740

246
00:18:21,740 --> 00:18:23,560
OK.

247
00:18:23,560 --> 00:18:24,320
Dan huwa inkwetanti.

248
00:18:24,320 --> 00:18:39,390

249
00:18:39,390 --> 00:18:41,500
OK, so xorta waħda.

250
00:18:41,500 --> 00:18:44,940
Hawnhekk għandna l-format
għall-attività tagħna innifsu.

251
00:18:44,940 --> 00:18:50,150
Dan huwa l-attività prinċipali tagħna, u hawn
aħna avviż li hemm il-bar-azzjoni.

252
00:18:50,150 --> 00:18:54,460
U allura aħna għandna dan bonjour
tikketta dinja, u nistgħu attwalment

253
00:18:54,460 --> 00:18:57,830
jeditjaw test dritt hawn.

254
00:18:57,830 --> 00:19:03,260
Jekk inti tmur u scroll
l isfel għall-Dinja Hello,

255
00:19:03,260 --> 00:19:06,360
nistgħu bidla li xi rridu.

256
00:19:06,360 --> 00:19:10,070
Per eżempju, jista 'jkun, Hi hemmhekk.

257
00:19:10,070 --> 00:19:12,820
Merħba.

258
00:19:12,820 --> 00:19:14,345
U hemm immorru, dan jinbidel.

259
00:19:14,345 --> 00:19:20,380

260
00:19:20,380 --> 00:19:20,880
Oh qalb.

261
00:19:20,880 --> 00:19:24,310

262
00:19:24,310 --> 00:19:26,010
Dan l-istil ma tkunx qed taħdem.

263
00:19:26,010 --> 00:19:28,320
OK, thats inkwetanti.

264
00:19:28,320 --> 00:19:32,000
OK, xorta waħda, nistgħu jimxu fuq mingħajr ma dak.

265
00:19:32,000 --> 00:19:38,560
Allura għal issa, ejja jippruvaw u
jagħmlu xi għalf verament bażiku.

266
00:19:38,560 --> 00:19:42,450
Allura hawnhekk għandna se jkollhom
tikketta, u allura aħna qed

267
00:19:42,450 --> 00:19:47,005
se jkollhom test view--
sorry, mhux ħsieb test,

268
00:19:47,005 --> 00:19:49,310
aħna qed tmur biex ikollhom test jeditjaw.

269
00:19:49,310 --> 00:19:53,900
U li huwa komponent
għalik biex tip u l-għalf.

270
00:19:53,900 --> 00:19:56,590

271
00:19:56,590 --> 00:20:07,240
Allura aħna għandna test sempliċi, u mbagħad
aħna biss iżżidhiex fuq interface tagħna.

272
00:20:07,240 --> 00:20:13,520
>> Hawnhekk, nixtieq li jżidu wkoll xi marġini
għall-quċċata hekk li jidher nicer.

273
00:20:13,520 --> 00:20:19,190
Allura aħna qed tmur biex jmorru fuq il-
proprjetajiet, u mbagħad fl-marġini quċċata,

274
00:20:19,190 --> 00:20:23,120
aħna qed tmur biex iżżid fil-20 DPs.

275
00:20:23,120 --> 00:20:28,170
Allura issa, DPs huma biss
unità tal-kejl fil Android,

276
00:20:28,170 --> 00:20:31,240
u dawn joqgħod għal densità
pixels indipendenti.

277
00:20:31,240 --> 00:20:35,380
Allura, kif inti tista 'taf, Android, hemm
ħafna tipi differenti ta 'skrinijiet

278
00:20:35,380 --> 00:20:38,410
u mbagħad dawn ikollhom
densitajiet differenti iskrin.

279
00:20:38,410 --> 00:20:42,584
Allura hawnhekk huwa biss se tkun
pixel indipendenti densità,

280
00:20:42,584 --> 00:20:44,750
hekk li għaddej biex tkun istess
matul kollha l-iskrins.

281
00:20:44,750 --> 00:20:49,046

282
00:20:49,046 --> 00:20:55,270
>> Going biex testendi dan it-test teditja, u
allura jien wkoll ser iżżid buttuna.

283
00:20:55,270 --> 00:21:02,900

284
00:21:02,900 --> 00:21:04,370
U li għaddej biex ngħid OK.

285
00:21:04,370 --> 00:21:09,639

286
00:21:09,639 --> 00:21:10,597
20 DPs.

287
00:21:10,597 --> 00:21:14,430

288
00:21:14,430 --> 00:21:16,630
OK.

289
00:21:16,630 --> 00:21:20,060
Allura issa għandna tliet
komponenti differenti.

290
00:21:20,060 --> 00:21:25,630
U l-mod nistgħu jirreferu għall
dawn fil-klassi tagħna attività prinċipali

291
00:21:25,630 --> 00:21:29,620
huwa billi tuża dan il-metodu
imsejħa findViewByID.

292
00:21:29,620 --> 00:21:36,790
Allura jien ser jiddefinixxu xi oqsma.

293
00:21:36,790 --> 00:21:48,290
Allura aħna għandna fil TextView,
hekk ejja ngħidu helloText.

294
00:21:48,290 --> 00:21:55,400

295
00:21:55,400 --> 00:21:59,930
U mbagħad jekk inti qed tuża Android Studio,
inti tista 'tuża is-supplent shortcut,

296
00:21:59,930 --> 00:22:01,120
jidħol.

297
00:22:01,120 --> 00:22:07,400
U kklikkja Importazzjoni Klassi awtomatikament
jimportaw il-klassijiet korrispondenti

298
00:22:07,400 --> 00:22:07,950
li għandna bżonn.

299
00:22:07,950 --> 00:22:10,590

300
00:22:10,590 --> 00:22:20,800
U allura hawnhekk jien ser żid identità biex
dan TextView u sejħa hija text_hello.

301
00:22:20,800 --> 00:22:28,320

302
00:22:28,320 --> 00:22:32,050
Issa li għandna definiti
ID għal dan TextView,

303
00:22:32,050 --> 00:22:38,020
nistgħu nużaw dan jirreferi għall-
textview li aħna biss iddefinita.

304
00:22:38,020 --> 00:22:47,970
Allura helloText ugwali
TextView findViewByID,

305
00:22:47,970 --> 00:22:52,630
u allura aħna jispeċifikaw il-ID li
irridu, li huwa r.ID.text_hello.

306
00:22:52,630 --> 00:22:55,360

307
00:22:55,360 --> 00:22:59,560
>> Allura dan huwa simili ħafna għal JavaScript
u jQuery, fejn nistgħu attwalment biss

308
00:22:59,560 --> 00:23:05,430
jirreferu għal ċerti elementi
fil-format eżatt

309
00:23:05,430 --> 00:23:08,330
billi tuża l-ID li għandna speċifikati.

310
00:23:08,330 --> 00:23:17,240
Allura b'mod ġenerali, għall-aċċess ta '
ċerti oġġett jew qasam partikolari

311
00:23:17,240 --> 00:23:22,030
fi tqassim tagħna, int ser ikollhom
biex jużaw dan il-metodu findViewByID.

312
00:23:22,030 --> 00:23:26,290
U allura aħna qed tmur biex jagħmlu l-istess
affarijiet għall-żewġ elementi l-oħra.

313
00:23:26,290 --> 00:23:29,570

314
00:23:29,570 --> 00:23:36,683
Hawnhekk, I vais
żid il-text_name ID.

315
00:23:36,683 --> 00:23:40,760

316
00:23:40,760 --> 00:23:42,770
Iva.

317
00:23:42,770 --> 00:23:46,610
Kif ukoll għal dan wieħed.

318
00:23:46,610 --> 00:23:49,345

319
00:23:49,345 --> 00:23:49,845
Button_ok.

320
00:23:49,845 --> 00:23:53,570

321
00:23:53,570 --> 00:23:58,120
>> Issa dak li nixtieq dan tagħmel hu
meta aħna ikklikkja l-buttuna OK,

322
00:23:58,120 --> 00:24:02,110
u għandna inputted xi tip
tal insemmu fil-qasam tat-test,

323
00:24:02,110 --> 00:24:10,880
allura huwa għaddej biex jaġġornaw din
tikketta li tgħid, hi, l-isem, welcome.

324
00:24:10,880 --> 00:24:16,520
Allura, lura fl ewlenija tagħna
klassi ta 'attività, aħna qed

325
00:24:16,520 --> 00:24:23,210
wkoll se tipprova u li jirreferu għal
dawk l-elementi li għandna biex isibu.

326
00:24:23,210 --> 00:24:30,860
>> Allura aħna għandna l-nameText EditText.

327
00:24:30,860 --> 00:24:33,615

328
00:24:33,615 --> 00:24:36,000
Oops.

329
00:24:36,000 --> 00:24:38,500
Ikteb u supplenti, klassi ta 'importazzjoni.

330
00:24:38,500 --> 00:24:41,060
U allura wkoll il-buttuna OK.

331
00:24:41,060 --> 00:24:45,660

332
00:24:45,660 --> 00:24:48,980
Bl-istess mod, aħna qed tmur biex
jagħmlu l-istess ħaġa aktar hawn.

333
00:24:48,980 --> 00:24:54,900
nameText ugwali EditText
findViewByID, r.ID.text_name.

334
00:24:54,900 --> 00:25:01,430

335
00:25:01,430 --> 00:25:03,380
U allura l-buttuna OK.

336
00:25:03,380 --> 00:25:10,180

337
00:25:10,180 --> 00:25:13,840
findViewByID, r.ID, u mbagħad button_ok.

338
00:25:13,840 --> 00:25:16,400

339
00:25:16,400 --> 00:25:22,240
>> OK, hekk issa għandna tlieta
Elementi li aħna rridu li jirreferu għall.

340
00:25:22,240 --> 00:25:27,630
Allura issa jien ser jehmeż
fuq ikklikkja semmiegħ biex buttuna tagħna

341
00:25:27,630 --> 00:25:30,440
biex jisimgħu għal klikks utent.

342
00:25:30,440 --> 00:25:35,780
Għal dak aħna biss jużaw il-
avveniment setOnClickListener.

343
00:25:35,780 --> 00:25:38,860

344
00:25:38,860 --> 00:25:44,010
Issa, hawnhekk huwa qal għandna bżonn
li tispeċifika setOnClickListener,

345
00:25:44,010 --> 00:25:51,030
u inti tista 'tagħmel dan billi biss li jkollhom
ġdid onClickListener, u l-istampa Ikteb.

346
00:25:51,030 --> 00:25:56,935
>> U allura inti għandek din anonima
klassi, jew oġġett anonima.

347
00:25:56,935 --> 00:25:59,530

348
00:25:59,530 --> 00:26:02,790
U għandna wkoll dan onclick
metodu, u li bażikament

349
00:26:02,790 --> 00:26:05,580
dak li għaddej biex jiġu msejħa
kulmeta għafast buttuna tagħna.

350
00:26:05,580 --> 00:26:15,860
>> Allura hawnhekk, nixtieq nikseb l-isem li
kien input fi qasam tat-test l-ewwel Allura

351
00:26:15,860 --> 00:26:17,700
Isem String ugwali għal
nameText.getText ().

352
00:26:17,700 --> 00:26:21,670

353
00:26:21,670 --> 00:26:26,400
Għal darb'oħra, dan huwa bħall-
Java sintassi għall jirreferi

354
00:26:26,400 --> 00:26:29,130
funzjonijiet fi ħdan l-oġġett.

355
00:26:29,130 --> 00:26:36,290
Allura nameText.getText, u allura aħna qed
ser jaqilbu għal string.

356
00:26:36,290 --> 00:26:41,090
Issa għandna l-isem li
kienet input mill-utent.

357
00:26:41,090 --> 00:26:46,140
>> U allura aħna qed tmur biex
jiġġeneraw string ġdida,

358
00:26:46,140 --> 00:26:48,980
hekk li għaddej biex jiġu msejħa bonjour.

359
00:26:48,980 --> 00:26:56,325
Jien se ngħid, hi, l-isem, welcome.

360
00:26:56,325 --> 00:27:00,810

361
00:27:00,810 --> 00:27:05,265
U fl-aħħarnett, inti tixtieq
li taġġorna l-helloText.

362
00:27:05,265 --> 00:27:09,190
Allura biex tagħmel dan, aħna sempliċiment sejħa
helloText.setText (bonjour).

363
00:27:09,190 --> 00:27:16,940

364
00:27:16,940 --> 00:27:17,440
OK.

365
00:27:17,440 --> 00:27:20,430

366
00:27:20,430 --> 00:27:22,770
Oops.

367
00:27:22,770 --> 00:27:30,645
>> Jien ser jippruvaw u run-ri Genymotion
finali żmien wieħed u ara jekk xogħlijiet.

368
00:27:30,645 --> 00:27:35,160

369
00:27:35,160 --> 00:27:38,810
Jekk ma jiġrix dan, huwa totalment multa.

370
00:27:38,810 --> 00:27:39,730
OK.

371
00:27:39,730 --> 00:27:41,970
So I raden ma jaħdimx.

372
00:27:41,970 --> 00:27:48,960

373
00:27:48,960 --> 00:27:52,955
Attwalment, let me tipprova tagħmel dan.

374
00:27:52,955 --> 00:27:56,188

375
00:27:56,188 --> 00:27:57,174
Jista jkun dan.

376
00:27:57,174 --> 00:28:05,548

377
00:28:05,548 --> 00:28:06,048
Genymotion.

378
00:28:06,048 --> 00:28:25,761

379
00:28:25,761 --> 00:28:26,261
OK.

380
00:28:26,261 --> 00:28:33,240

381
00:28:33,240 --> 00:28:33,980
Kull dritt.

382
00:28:33,980 --> 00:28:35,170
Iva, hija taħdem.

383
00:28:35,170 --> 00:28:38,020
OK.

384
00:28:38,020 --> 00:28:39,250
Dan kien biża.

385
00:28:39,250 --> 00:28:40,890
OK.

386
00:28:40,890 --> 00:28:43,270
I ma jfissirx li tagħmel dan.

387
00:28:43,270 --> 00:28:46,570
OK, hekk aħna jkollhom din emulator Android.

388
00:28:46,570 --> 00:28:49,070
Let me dawran dan off.

389
00:28:49,070 --> 00:28:52,290

390
00:28:52,290 --> 00:28:55,720
Allura aħna għandna emulator Android tagħna.

391
00:28:55,720 --> 00:28:59,750
Allura aħna qed tmur biex jippruvaw u
run dan app li għamilna.

392
00:28:59,750 --> 00:29:04,100
Just tmur biex ikklikkja l-buttuna Play,
u li għaddej biex ngħid, stennija għall ADB.

393
00:29:04,100 --> 00:29:10,580

394
00:29:10,580 --> 00:29:12,780
Oh, raġel.

395
00:29:12,780 --> 00:29:13,280
Nerġgħu.

396
00:29:13,280 --> 00:29:25,419

397
00:29:25,419 --> 00:29:30,150
OK, I raden dan xorta ma jaħdimx.

398
00:29:30,150 --> 00:29:31,280
OK, nevermind, imbagħad.

399
00:29:31,280 --> 00:29:33,841

400
00:29:33,841 --> 00:29:38,150
din se tkun ħasra.

401
00:29:38,150 --> 00:29:41,030
Iżda hekk ejja ngħidu li rridu
biex joħolqu attività ġdida,

402
00:29:41,030 --> 00:29:45,730
u aħna qed tmur biex ikollhom
stampa f'din l-attività.

403
00:29:45,730 --> 00:29:52,120
Biex tagħmel dan, nistgħu sempliċement ikklikkja
dan File, u mbagħad Ġdid.

404
00:29:52,120 --> 00:29:57,760
U allura hawnhekk nistgħu jagħżlu
Attività, u l-Attività mbagħad Blank.

405
00:29:57,760 --> 00:29:59,840
Hawnhekk, aħna qed tmur biex sejħa
forsi CatActivity.

406
00:29:59,840 --> 00:30:03,030

407
00:30:03,030 --> 00:30:06,537
>> OK, hekk issa li jiġġenera żewġ fajls oħra.

408
00:30:06,537 --> 00:30:08,245
Wieħed huwa msejjaħ
activity_cat, u l-oħra

409
00:30:08,245 --> 00:30:10,630
huwa msejjaħ catActivity, li huwa klassi.

410
00:30:10,630 --> 00:30:13,250

411
00:30:13,250 --> 00:30:18,648
Mela ejja ngħidu li aħna tixtieq iżżid
stampa ta 'qattus dritt hawn.

412
00:30:18,648 --> 00:30:21,790

413
00:30:21,790 --> 00:30:25,220
Allura meta inti tagħmel dan, aħna qed tmur
biex jużaw il-klassi ImageView.

414
00:30:25,220 --> 00:30:28,076

415
00:30:28,076 --> 00:30:31,340
Aħna ser iżżidhiex fuq hawnhekk.

416
00:30:31,340 --> 00:30:35,350
U mbagħad stabbiliti l-marġini li jkun 20 DP.

417
00:30:35,350 --> 00:30:37,920

418
00:30:37,920 --> 00:30:41,240
>> U issa aħna qed tmur biex issib
immaġni ta 'qattus fuq l-internet.

419
00:30:41,240 --> 00:30:43,270
Mela ejja tara.

420
00:30:43,270 --> 00:30:43,770
Cat.

421
00:30:43,770 --> 00:30:48,280

422
00:30:48,280 --> 00:30:50,270
OK.

423
00:30:50,270 --> 00:30:51,145
I raden dan huwa multa.

424
00:30:51,145 --> 00:30:59,070

425
00:30:59,070 --> 00:31:01,032
OK.

426
00:31:01,032 --> 00:31:02,780
Allura issa għandna immaġini tagħna.

427
00:31:02,780 --> 00:31:07,720
Allura aħna qed tmur biex iżżid
hija fis-proġett tagħna.

428
00:31:07,720 --> 00:31:16,140
Tista 'tagħmel dan billi dritt
tikklikkja, u then-- aħna

429
00:31:16,140 --> 00:31:25,965
jistgħu attwalment biss tiftaħ dan,
go downloads, sorry, desktop.

430
00:31:25,965 --> 00:31:28,310
Going biex jippruvaw u jsibuha.

431
00:31:28,310 --> 00:31:28,810
Cat.

432
00:31:28,810 --> 00:31:34,580

433
00:31:34,580 --> 00:31:35,790
Dritt hawn.

434
00:31:35,790 --> 00:31:42,820
Jien ser jibagħtu kopja tagħha fis folder tiegħi.

435
00:31:42,820 --> 00:31:46,800
Issa, li għaddej biex jistaqsu lili ftit għażliet.

436
00:31:46,800 --> 00:31:49,250
Issa, I biss tixtieq li dan
jkun fil-folder drawable,

437
00:31:49,250 --> 00:31:54,390
u li għaddej biex tkun għal kulħadd
riżoluzzjonijiet iskrin differenti.

438
00:31:54,390 --> 00:31:57,100
Alternattivament, nistgħu
attwalment tagħżel biss

439
00:31:57,100 --> 00:32:01,270
li screen riżoluzzjoni inti
tixtieq din id-dehra li tkun fil.

440
00:32:01,270 --> 00:32:06,150
Allura jmorru biex tagħżel l-
folder drawable, ikklikkja OK.

441
00:32:06,150 --> 00:32:08,660

442
00:32:08,660 --> 00:32:09,910
Just tmur biex insemmu dan cat.jpg.

443
00:32:09,910 --> 00:32:12,560

444
00:32:12,560 --> 00:32:15,970
>> OK, iva, issa huwa miżjud
fis-għan immaġini tagħna.

445
00:32:15,970 --> 00:32:18,800

446
00:32:18,800 --> 00:32:22,020
aħna qed tmur biex ikollhom tuża
dan is-sors dritt hawn,

447
00:32:22,020 --> 00:32:27,420
u mbagħad nistgħu nużaw dan dot dot dot
buttuna, u jagħżel l-immaġni qattus.

448
00:32:27,420 --> 00:32:30,010

449
00:32:30,010 --> 00:32:32,620
OK.

450
00:32:32,620 --> 00:32:39,480
Allura issa I tixtieq li tagħmel dan bħal
li huwa biss id-dritt daqs.

451
00:32:39,480 --> 00:32:50,050
Allura jien ser tagħżel din taġġusta
ħsieb limiti għażla dritt hawn,

452
00:32:50,050 --> 00:32:54,960
u li awtomatikament
settijiet lill-daqs dritt.

453
00:32:54,960 --> 00:32:55,460
OK.

454
00:32:55,460 --> 00:33:02,410

455
00:33:02,410 --> 00:33:09,380
Issa, li attwalment tniedi dan
attività mill-attività preċedenti tagħna,

456
00:33:09,380 --> 00:33:15,470
int ser jkollhom jużaw
xi ħaġa imsejħa l-intenzjoni.

457
00:33:15,470 --> 00:33:19,115
Mela ejja ngħidu jien ser iżżid ieħor
buttuna li tniedi l-attività.

458
00:33:19,115 --> 00:33:26,640

459
00:33:26,640 --> 00:33:29,150
Jien ser iżżid hawnhekk, dritt hawn.

460
00:33:29,150 --> 00:33:36,160
U allura li għaddej biex
ikollhom it-test jattivaw dan.

461
00:33:36,160 --> 00:33:38,711

462
00:33:38,711 --> 00:33:39,210
Oops.

463
00:33:39,210 --> 00:33:42,470

464
00:33:42,470 --> 00:33:43,320
OK.

465
00:33:43,320 --> 00:33:47,560
>> Issa, kif do we attwalment tiftaħ il-
attività ġdida fi ħdan din l-attività?

466
00:33:47,560 --> 00:33:52,280

467
00:33:52,280 --> 00:33:54,650
Allura istess jittrattaw bħal qabel.

468
00:33:54,650 --> 00:34:01,120
Għandna bżonn li jżid ID għal dan
buttuna, u sejħa hija button_activate.

469
00:34:01,120 --> 00:34:09,489

470
00:34:09,489 --> 00:34:16,880
U mbagħad fl-attività ewlenija tagħna, li jmorru
li jkollhom din Button activateButton ġdida.

471
00:34:16,880 --> 00:34:21,630

472
00:34:21,630 --> 00:34:26,150
U allura wkoll tuża l-
Metodu findViewByID.

473
00:34:26,150 --> 00:34:29,449

474
00:34:29,449 --> 00:34:33,960
activateButton ugwali Button
findViewByID r.ID.button_activate.

475
00:34:33,960 --> 00:34:43,960

476
00:34:43,960 --> 00:34:45,830
>> OK.

477
00:34:45,830 --> 00:34:48,500
U allura aħna wkoll se
żid fi onClickListener.

478
00:34:48,500 --> 00:34:56,360

479
00:34:56,360 --> 00:34:57,294
New onClickListener.

480
00:34:57,294 --> 00:35:01,870

481
00:35:01,870 --> 00:35:07,145
U allura aħna qed tmur biex tuża
dan ħaġa imsejħa Intenzjoni.

482
00:35:07,145 --> 00:35:10,070

483
00:35:10,070 --> 00:35:11,905
Intenzjoni ugwali Intenzjoni ġdid (dan).

484
00:35:11,905 --> 00:35:17,260

485
00:35:17,260 --> 00:35:20,699
U allura l-isem tal-
attività li aħna rridu li juru up.

486
00:35:20,699 --> 00:35:22,990
Allura hawn f'dan, aħna qed tmur
li jkollhom catActivity.class.

487
00:35:22,990 --> 00:35:30,412

488
00:35:30,412 --> 00:35:31,147
Jiddispjacini.

489
00:35:31,147 --> 00:35:33,230
Aħna qed tmur biex ikollhom
tispeċifika @ MainActivity.this.

490
00:35:33,230 --> 00:35:36,100

491
00:35:36,100 --> 00:35:41,910
Allura issa l-proprjetà .Din hija tirreferi
biex l-istanza attwali tal-oġġett

492
00:35:41,910 --> 00:35:43,271
innifsu.

493
00:35:43,271 --> 00:35:43,770
OK.

494
00:35:43,770 --> 00:35:48,020
Sa dan il-punt, xi mistoqsijiet?

495
00:35:48,020 --> 00:35:48,890
Kollha tajba?

496
00:35:48,890 --> 00:35:49,390
Kull dritt.

497
00:35:49,390 --> 00:35:52,890

498
00:35:52,890 --> 00:35:57,430
>> U mbagħad jekk inti tixtieq li tibda
l-attività, huwa pjuttost sempliċi.

499
00:35:57,430 --> 00:35:59,904
Aħna biss sejħa l-il-
Metodu startActivity.

500
00:35:59,904 --> 00:36:04,260

501
00:36:04,260 --> 00:36:07,355
U allura aħna jgħaddu fil-Intenzjoni
oġġett li għadna kemm definiti.

502
00:36:07,355 --> 00:36:10,640

503
00:36:10,640 --> 00:36:16,140
Sfortunatament, aħna
ma tistax verament juru din.

504
00:36:16,140 --> 00:36:23,000
I kien jittama li nistgħu tmexxi effettivament
dan u juru dan flimkien fis-seminar,

505
00:36:23,000 --> 00:36:26,661
imma sfortunatament mhux.

506
00:36:26,661 --> 00:36:28,980
Oh, raġel.

507
00:36:28,980 --> 00:36:29,480
Nara.

508
00:36:29,480 --> 00:36:32,134
Oh, aħna qed tmur biex tipprova u joqtlu ATB.exe.

509
00:36:32,134 --> 00:36:43,510

510
00:36:43,510 --> 00:36:45,214
OK.

511
00:36:45,214 --> 00:36:45,714
Nerġgħu.

512
00:36:45,714 --> 00:36:53,490

513
00:36:53,490 --> 00:36:56,262
Did taħdem?

514
00:36:56,262 --> 00:36:57,710
Oh, OK.

515
00:36:57,710 --> 00:37:00,660
Allura issa huwa attwalment kumpilazzjoni.

516
00:37:00,660 --> 00:37:02,410
Oh.

517
00:37:02,410 --> 00:37:04,420
Sfortunatament, hemm
ebda tagħmir running.

518
00:37:04,420 --> 00:37:06,040
Ejja nippruvaw u jerġgħu jibdew emulator tiegħi.

519
00:37:06,040 --> 00:37:56,335

520
00:37:56,335 --> 00:37:57,880
Ah, hemm immorru.

521
00:37:57,880 --> 00:37:59,050
Deher.

522
00:37:59,050 --> 00:38:00,070
OK.

523
00:38:00,070 --> 00:38:06,010
Allura jien ser tniedi tiegħi
app fuq emulator Android tiegħi.

524
00:38:06,010 --> 00:38:08,330
U aħna għandna l-affarijiet
li aħna definita heure.

525
00:38:08,330 --> 00:38:13,620
Allura aħna għandna t-tikketta, il-fehma test,
l-qasam tat-test, u mbagħad buttuna.

526
00:38:13,620 --> 00:38:18,449
Allura jien ser input
isem tiegħi dritt hawn,

527
00:38:18,449 --> 00:38:19,990
u hemm immorru, dan bidlet it-test.

528
00:38:19,990 --> 00:38:25,980
Allura jekk aħna tip fil Foo, huwa
se jibdlu l Foo.

529
00:38:25,980 --> 00:38:29,040
>> U jekk I ikklikkja l-
Jattiva buttuna, li

530
00:38:29,040 --> 00:38:34,560
għandna marbuta ma attwalment tniedi
attività ġdida, wieħed jittama li dan se taħdem,

531
00:38:34,560 --> 00:38:35,190
hemm immorru.

532
00:38:35,190 --> 00:38:36,760
Hija tniedi l-attività l-ġdida.

533
00:38:36,760 --> 00:38:40,001

534
00:38:40,001 --> 00:38:47,010
Biex tmur lura, nistgħu istampa
il-buttuna Lura dritt hawn.

535
00:38:47,010 --> 00:38:47,510
Jew le.

536
00:38:47,510 --> 00:38:49,610
Oh, hemm immorru.

537
00:38:49,610 --> 00:38:51,450
Oops.

538
00:38:51,450 --> 00:38:52,611
Dan kien ħażin.

539
00:38:52,611 --> 00:38:53,890
OK.

540
00:38:53,890 --> 00:38:58,550
>> Allura issa li aħna għandna implimentati
xi għalf bażiku Android,

541
00:38:58,550 --> 00:39:04,800
nistgħu nippruvaw u jagħmlu xi
Jittieħed aktar ikkumplikat.

542
00:39:04,800 --> 00:39:10,070
Allura l-ewwel, ejja ipprova u jgħaddu messaġġi
minn attività waħda għall-ieħor.

543
00:39:10,070 --> 00:39:13,760
Mela ejja ngħidu li rridu jgħaddu
isem mill-attività ewlenija

544
00:39:13,760 --> 00:39:16,710
għall-attività qattus.

545
00:39:16,710 --> 00:39:19,740
U isem ikun
miksuba minn dan nameText.

546
00:39:19,740 --> 00:39:23,510

547
00:39:23,510 --> 00:39:30,160
>> OK, so ewwel, aħna qed tmur biex
irkuprata l-isem dritt hawn.

548
00:39:30,160 --> 00:39:32,230
Isem String ugwali
nameText.getText (). toString ().

549
00:39:32,230 --> 00:39:39,588

550
00:39:39,588 --> 00:39:41,420
OK.

551
00:39:41,420 --> 00:39:52,260
U allura nistgħu nużaw dan il-ħaġa
imsejħa intent.putExtra (isem),

552
00:39:52,260 --> 00:39:57,650
u allura effettivament irid ukoll
ewlieni għal dan il-qasam żejda.

553
00:39:57,650 --> 00:40:05,520
>> Allura jien ser jiddefinixxu ġdida
ċavetta, aħna ser sejħa hija EXTRA_NAME.

554
00:40:05,520 --> 00:40:11,570

555
00:40:11,570 --> 00:40:17,160
Allura jien ser tuża dan
ewlenin, CatActivity.EXTRA_NAME,

556
00:40:17,160 --> 00:40:21,010
u mbagħad jgħaddu fl-isem innifsu.

557
00:40:21,010 --> 00:40:26,370
>> OK, hekk issa nistgħu ngħidu irkuprata
dan fi ħdan il-CatActivity ġdid.

558
00:40:26,370 --> 00:40:38,650
Biex tagħmel dan, irridu nużaw l-
intenzjoni ugwali metodu getIntent.

559
00:40:38,650 --> 00:40:41,360
Allura issa li għaddej biex
irkuprata l-intenzjoni li

560
00:40:41,360 --> 00:40:45,070
kien jintuża għas-sejħiet din l-attività l-ġdida.

561
00:40:45,070 --> 00:40:50,340
Mela jekk inti tixtieq li tkun irkuprata l-sekwenza
li għandna attwalment tpoġġi ġewwa l-intenzjoni,

562
00:40:50,340 --> 00:41:00,255
inti tista 'tuża intent.getStringExtra
u mbagħad jgħaddu fl-istess ċavetta,

563
00:41:00,255 --> 00:41:04,080

564
00:41:04,080 --> 00:41:10,570
>> OK, hekk issa ejja ngħidu aħna inti
trid tibdel il-qasam.

565
00:41:10,570 --> 00:41:14,422

566
00:41:14,422 --> 00:41:15,630
Bidla dan il-qasam dritt hawn.

567
00:41:15,630 --> 00:41:18,400

568
00:41:18,400 --> 00:41:20,900
U ejja jagħmlu l-font
daqs ta 'dan il-qasam akbar.

569
00:41:20,900 --> 00:41:26,480
Mela ejja ngħidu Irrid li dan ikun 20 DP.

570
00:41:26,480 --> 00:41:28,340
OK.

571
00:41:28,340 --> 00:41:32,070
U jien ser iżżid
ID għal dan TextView,

572
00:41:32,070 --> 00:41:35,690
u jien ser sejħa hija text_cat.

573
00:41:35,690 --> 00:41:41,170

574
00:41:41,170 --> 00:41:41,670
Jiddispjacini.

575
00:41:41,670 --> 00:41:45,630

576
00:41:45,630 --> 00:41:51,310
>> U lura fil CatActivity,
istess jittrattaw bħal qabel.

577
00:41:51,310 --> 00:41:55,090
Aħna qed tmur biex jiddefinixxu xi oqsma.

578
00:41:55,090 --> 00:41:58,890
Hawnhekk huwa għaddej biex tkun
a catText TextView.

579
00:41:58,890 --> 00:42:03,500

580
00:42:03,500 --> 00:42:11,750
U mbagħad catText ugwali TextView
findViewByID, r.ID.text_cat.

581
00:42:11,750 --> 00:42:17,230

582
00:42:17,230 --> 00:42:18,780
OK.

583
00:42:18,780 --> 00:42:24,100
U mbagħad lura fil hawn, jien
ser tiffissa d-dritt test

584
00:42:24,100 --> 00:42:28,120
wara we irkuprata għal
mis-intenzjoni.

585
00:42:28,120 --> 00:42:30,207

586
00:42:30,207 --> 00:42:30,790
setText (isem).

587
00:42:30,790 --> 00:42:36,020

588
00:42:36,020 --> 00:42:38,056
>> OK, so ejja jippruvaw li l-.

589
00:42:38,056 --> 00:42:39,070
Ikklikkja l-buttuna Play.

590
00:42:39,070 --> 00:42:41,830

591
00:42:41,830 --> 00:42:43,445
Jien ser jużaw l-istess apparat.

592
00:42:43,445 --> 00:42:47,770

593
00:42:47,770 --> 00:42:50,380
Lura fil hawn.

594
00:42:50,380 --> 00:42:57,030
Mela ejja ngħidu I ma input--
jekk aħna ma jispeċifika l-ebda isem,

595
00:42:57,030 --> 00:42:59,330
ejja ara dak li jiġri.

596
00:42:59,330 --> 00:43:02,150
Allura issa hemm xejn li jidher.

597
00:43:02,150 --> 00:43:10,390
Allura aħna mur lura u input isem tagħna,
huwa biss se ngħid Fred.

598
00:43:10,390 --> 00:43:14,670
Allura nistgħu attwalment jgħaddu messaġġi
minn attività waħda għall-ieħor.

599
00:43:14,670 --> 00:43:15,170
OK.

600
00:43:15,170 --> 00:43:18,040

601
00:43:18,040 --> 00:43:22,590
>> Hekk hemm mazz ta 'fehmiet oħrajn
li tista 'tuża fil Android.

602
00:43:22,590 --> 00:43:29,740
Allura issa għandna bars progress, aħna għandna
lista fehmiet, għandna buttuni toggle,

603
00:43:29,740 --> 00:43:33,950
u jekk int verament riedu
biex jitgħallmu aktar dwar dan,

604
00:43:33,950 --> 00:43:36,790
inti tista 'attwalment iżuru dawn il-paġni web.

605
00:43:36,790 --> 00:43:41,160
Huma fihom ir-riżorsi differenti ħafna.

606
00:43:41,160 --> 00:43:45,230
Hekk per eżempju, l-API
jiggwidaw dritt hawn fil-fatt

607
00:43:45,230 --> 00:43:50,885
jagħtik xi eżempji kodiċi għall
ċerti karatteristiċi fil-librerija Android.

608
00:43:50,885 --> 00:43:53,692

609
00:43:53,692 --> 00:43:57,560
>> U xi tutorials ftit sibt utli
meta tagħlim dwar Android.

610
00:43:57,560 --> 00:44:06,890
Dik hija l-tutorja uffiċjali innifsu,
u wkoll dan tutorja ieħor dritt hawn.

611
00:44:06,890 --> 00:44:10,200
U fl-aħħarnett, inti tista 'attwalment
użu minn libreriji differenti

612
00:44:10,200 --> 00:44:12,710
għall-applikazzjoni Android tiegħek.

613
00:44:12,710 --> 00:44:16,370
Issa, dawn attwalment jestendu
l-funzjonalità ta 'app tiegħek

614
00:44:16,370 --> 00:44:19,665
mingħajr ma jkollhom
really jikteb il-kodiċi ferm.

615
00:44:19,665 --> 00:44:21,540
L-tnaqqis hija, ta '
course, li inti fil-fatt

616
00:44:21,540 --> 00:44:23,890
jkollhom biex jitgħallmu l-libreriji yourself.

617
00:44:23,890 --> 00:44:29,170
>> Hekk per eżempju, jekk inti tixtieq li tagħmel
użu ta 'Dropbox teknoloġija sħaba,

618
00:44:29,170 --> 00:44:33,400
allura inti tista 'tuża l-API Dropbox.

619
00:44:33,400 --> 00:44:36,530
Simili mal-API Facebook.

620
00:44:36,530 --> 00:44:40,490
U allura hemm attwalment ftit
libreriji differenti oħra mixxellanji

621
00:44:40,490 --> 00:44:41,700
li tista 'tuża.

622
00:44:41,700 --> 00:44:45,560
Jekk inti qed tipprova tikseb, bħal,
JSON minn ċertu websajt,

623
00:44:45,560 --> 00:44:49,560
allura naħseb li l-JSON Google
librerija tkun pretty utli.

624
00:44:49,560 --> 00:44:56,200
Allura issa, li jikkonverti JSON
formattjati test ġo Java oġġett,

625
00:44:56,200 --> 00:44:58,600
u viċi versa.

626
00:44:58,600 --> 00:45:01,110
>> U allura hemm Aġġornament Retroattiv u Picasso.

627
00:45:01,110 --> 00:45:07,240
U li jekk inti tixtieq li use--
li għall jekk inti qed tuża API mistrieħ.

628
00:45:07,240 --> 00:45:13,300
U Picasso, jekk inti qed tuża stampi
għall-applikazzjoni Android tiegħek.

629
00:45:13,300 --> 00:45:14,350
Kull dritt.

630
00:45:14,350 --> 00:45:18,030
Grazzi ħafna,
u jkollhom kodifikazzjoni gost.

631
00:45:18,030 --> 00:45:19,723