ኄ 3 ቦ Android ᮊᄬᝠ
వቦߦ˸ᄬಖ
җߙԅ Android ົં ॴࠓ Android ё༝ဈᆦߑ Ⴧไ Manifest ำߑઝఘ ༉؟ main.xml ำߑ Eclipse IDE ᓔথ⦃๗ЁᓎゟϔϾ Android ᑨ⫼ᑣПࠡˈ佪ܜ㽕߯ᓎϔϾ Android 乍 ⳂᎹˈᑊϨᓎゟϔϾਃࡼ䜡㕂ˈᓎゟ乍ⳂᎹⱘⳂⱘህᰃЎᓔথⱘᑨ⫼ᑣᨁᓎད䖤㸠⦃๗ 䳔㽕ⱘᬃᣕDŽℸПৢԴᠡৃҹᓔྟ㓪ݭǃ䇗䆩ˈҹঞ䖤㸠ᑨ⫼ᑣDŽᴀゴЏ㽕䗮䖛乍Ⳃⱘᓎ ゟˈњ㾷 Android 乍Ⳃᓎゟ䖛ҹঞϾ䞡㽕᭛ӊ᭛ӊݙᆍ䜡㕂DŽ
3.1 नݽኄʷ˔ Android ᮊᄬ Helloworld
1ĕߙົં
ᠧᓔ Eclipseˈ䗝ᢽ File -> New -> Project -> Android Projectˈབ 3-1 ᠔⼎DŽ
Ё䳔㽕⫼᠋฿ܹ䗝ᢽⱘ乍Ў˖
䕧ܹᎹৡ⿄˄project name˅˖Ꮉৡ⿄ᰃᑨ⫼ᑣ Eclipse ⦃๗Ё乍ⳂⳂᔩৡ⿄ˈ
བ HelloWorldDŽ
Contentֵᙃᷣ˖᳝Ͼ䗝乍ˈ࣒䗝 Create new project˄ᓎゟᮄ乍Ⳃ˅ Use default
location˄Փ⫼咬䅸Ꮉぎ䯈˅DŽ
PropertiesሲᗻᷣDŽሲᗻᷣЁࣙᣀ˖
˄1˅Package name˖Activity ㉏ⱘࣙৡ⿄ˈࣙৡᰃᑨ⫼ᑣੑৡぎ䯈˄䙉✻ Java 䇁㿔ੑ ৡॳ߭ᅮН˅ˈࣙৡ⿄ Android ㋏㒳Ёᖙ乏ଃϔDŽ
˄2˅Activity name ⌏ࡼৡ⿄˖߯ᓎ stub.java ᭛ӊㄝ᭛ӊᑣৡᄫDŽ
˄3˅Application name ᑨ⫼ᑣৡ⿄˖ᑨ⫼ᑣৡ⿄ᰃᑨ⫼ᑣਜ⦄㒭⫼᠋ⱘৡ⿄ˈབ HelloWorldDŽ ᅠ៤䕧ܹৢऩߏ Finish ᣝ䪂DŽ 2ĕၮё༝ ᔧϞ䴶ⱘ䖛ᅠ៤ৢˈADT ᦦӊӮḍԴⱘᎹ㉏ൟ߯ᓎড়䗖ⱘ᭛ӊ᭛ӊ།ˈ⫼᠋ৃ ҹ䖤㸠ᑨ⫼ᑣˈ៥Ӏৃҹ䗝ᢽᢳᴎЁ䆩䖤㸠ᑣDŽϡ䖛ܜⳟⳟ Android Ꮉ᭛ӊ㒧ᵘˈ њ㾷ϔϟᎹⱘϾ㒘៤䚼ߚҹঞᅗӀⱘ⫼DŽ
Eclipse ⱘ package Explorer ⌣㾜఼Ё䗝ᢽ߮ᠡᓎゟⱘ Helloworld 乍ⳂˈৃҹⳟࠄḍⳂ ᔩࣙಯϾᄤⳂᔩˈབ 3-2 ᠔⼎DŽ 3-2 src/üüJava ⑤ҷⷕᄬᬒⳂᔩˈ⫼Ѣㅵ⧚⬅ ADT˄Android ᓔথᎹ˅㞾ࡼ⫳៤ⱘ ActivityḚᶊҷⷕҹঞ⫼᠋㞾Ꮕ߯ᓎⱘҷⷕˈܕ䆌⫼᠋ׂᬍⱘ Java ᭛ӊ䛑ᬒ㕂䖭䞠ˈ བϞ䴶߯ᓎⱘᎹ HelloWorldDŽ res/üü䌘⑤᭛ӊ།˖ࣙᑣЁ᠔᳝ⱘ᭛ӊˈ䖭ϾⳂᔩЁᄬᬒᑨ⫼ᇚ⫼ࠄⱘ䌘⑤DŽ
བ res Ⳃᔩϟ᳝ res/drawable ⫼Ѣᬒ㕂⠛䌘⑤ˈres/layout ⫼Ѣᬒ㕂Ꮧሔ⫼ⱘ xml ᭛ ӊˈres/values ⫼Ѣᬒ㕂ϔѯᐌ䞣᭄DŽ
gen/üü㞾ࡼ⫳៤Ⳃᔩˈ乒ৡᗱНህᰃ㋏㒳㞾ࡼ⫳៤ⱘϔѯ᭛ӊᄬᬒѢℸˈ݊Ё᳔䞡 㽕ⱘ᭛ӊᰃ R.java ᭛ӊˈ⬅ ADT 㞾ࡼ⫳៤ˈ⫼Ѣᓩ⫼䌘⑤᭛ӊ།Ёⱘ䌘⑤᭛ӊDŽADT Ӯḍ䌘⑤།Ёⱘ xml Ꮧሔ᭛ӊˈᷛ᭛ӊᐌ䞣㞾ࡼৠℹ R.java ᭛ӊˈ᠔ҹˈᑨ 䙓ܡᎹׂᬍ R.java ᭛ӊݙᆍDŽ
assets/üü䌘ѻⳂᔩˈℸ⫼ѢᄬᬒॳᓣḐᓣ᭛ӊˈ՟བ䷇乥᭛ӊǃ㾚乥᭛ӊㄝѠ䖯ࠊ
Ḑᓣ᭛ӊDŽℸⳂᔩЁⱘ䌘⑤ϡ㛑㹿 R.java ᭛ӊ㋶ᓩˈϔ㠀ᚙމϟЎぎDŽ
ϔϾᑧ᭛ӊ˖android.jar ᑧ᭛ӊᰃ Android ᑣᑨ⫼ⱘߑ᭄ᑧ᭛ӊˈAndroid ᬃᣕⱘ API 䛑ࣙ䖭Ͼ᭛ӊ䞠DŽ ϸϾᎹ᭛ӊ˖ AndroidManifest.xmlüüᎹ⏙ऩ᭛ӊDŽᑨ⫼ᑣЁ᠔᳝ⱘࡳ㛑䛑ℸ߫ߎˈⳌᔧѢ 䜡㕂᭛ӊˈ䜡㕂⫼᠋ᑣৡ⿄ǃᷛǃActivtityǃServiceǃReceiver ㄝˈབᵰᑣ ЁՓ⫼ࠄњ㋏㒳ݙ㕂ⱘࡳ㛑˄GPSǃ⬉䆱᳡ࡵǃѦ㘨㔥᳡ࡵǃⷁֵ᳡ࡵㄝ˅ˈ䳔㽕 䖭Ͼ᭛ӊЁໄᯢՓ⫼ᴗ䰤DŽ default.propertiesüü乍Ⳃ⦃๗ֵᙃˈϔ㠀ϡׂᬍℸ᭛ӊDŽ
3.2 Android ऄၹሮऀੇ
Androidᑨ⫼⬅⾡ḋⱘ㒘ӊᵘ៤DŽ䖭ѯ㒘ӊ䚼ߚ䛑ᰃᵒᬷ䖲ⱘˈޚ⹂ഄ䇈ৃҹᡞ ϔϾᑨ⫼ᑣⳟ៤ᰃ㒘ӊⱘ㘨ড়㗠䴲ᰃϔϾऩϔⱘᑨ⫼DŽAndroid ЁϔϾḌᖗⱘὖᗉህᰃ㒘ӊ ⱘ䞡⫼ˈгህᰃ䇈ϔϾᑨ⫼ᑣЁՓ⫼ⱘ㒘ӊⱘᑨ⫼ᑣЁгৃҹՓ⫼DŽ Android ㋏㒳ЁˈЎњᬃᣕ㒘ӊ䞡⫼ⱘࡳ㛑ˈ㋏㒳ᖙ乏ৃҹਃࡼ䖭ѯ㒘ӊˈℸ Android ㋏㒳Ёᦤկњϔѯᖙ㽕ⱘ㒘ӊˈᐂࡽ㋏㒳ᅠ៤㒘ӊ䇗⫼ࡳ㛑DŽ ϔϾ Android ᑨ⫼ᑣϔ㠀᳝ಯ㒘ӊˈߚ߿ᰃ Activity˄⌏ࡼ˅ǃService˄᳡ࡵ˅ǃBroadcastContent Providers˄ݙᆍᦤկ㗙˅ǃReceiver˄ᑓ᪁ᬊ఼˅DŽAndroid ⱘ↣Ͼ䇋∖䛑⬅⡍ᅮⱘ㒘ӊ
ᴹ໘⧚DŽᑨ⫼ᑣЁ⫼ࠄⱘ䙷ѯ㒘ӊ᭛ӊ AndroidManifest.xm Ꮉ⏙ऩЁᇚӮ߫ߎDŽ ⌏ࡼ˄Activity˅˖⌏ࡼ˄Activity˅ህᰃϔϾ᳝⫳ੑ਼ᳳⱘᇍ䈵DŽϔϾ Activity ህᰃᅠ ៤ᶤѯᎹⱘҷⷕഫˈActivity ᰃЎ⫼᠋᪡㗠ሩ⼎ⱘৃ㾚࣪⫼᠋⬠䴶ˈ⫼᠋ৃҹϢ ᑣ䖯㸠ѸѦⱘ⬠䴶DŽൟഄˈԴᇚӮᣛᅮԴⱘᑨ⫼ᑣЁⱘϔϾ⌏ࡼЎᭈϾᑣⱘ ܹষ⚍DŽ ᳡ࡵ˄Service˅˖᳡ࡵᰃ䖤㸠ৢৄⱘϔ↉ҷⷕˈ⫼᠋ϡৃ㾕DŽᅗৃҹ䖤㸠ᅗ㞾Ꮕ ⱘ䖯ˈгৃҹ䖤㸠݊Ҫᑨ⫼ᑣ䖯ⱘϞϟ᭛˄context˅䞠䴶ˈ䖭পއѢ㞾䑿ⱘ 䳔㽕DŽ݊Ҫⱘ㒘ӊৃҹ㒥ᅮࠄϔϾ᳡ࡵ˄Service˅Ϟ䴶ˈ䗮䖛䖰䖛䇗⫼˄RPC˅ ᴹ䇗⫼䖭Ͼᮍ⊩DŽ՟བၦԧ᪁ᬒ఼ⱘ᳡ࡵˈᔧ⫼᠋䗔ߎၦԧ䗝ᢽ⫼᠋⬠䴶ˈҪҡ✊Ꮰ ᳯ䷇Фձ✊ৃҹ㒻㓁᪁ᬒˈ䖭ᯊህᰃ⬅᳡ࡵ˄Service˅ᴹֱ䆕ᔧ⫼᠋⬠䴶݇䯁ᯊ䷇Ф 㒻㓁᪁ᬒⱘDŽ
ݙᆍᦤկ㗙˄Content Providers˅˖ݙᆍᦤկ㗙˄Content Providers˅ᦤկᇍ䆒Ϟ᭄
䖯㸠䆓䯂ⱘ᭄ҧᑧDŽ Android Ёˈݙᆍᦤկ㗙㒳ϔњ᭄䆓䯂ᮍᓣDŽൟⱘ ՟ᄤህᰃՓ⫼ݙᆍᦤկ㗙ᴹ䆓䯂㘨㋏Ҏ߫㸼DŽᑨ⫼ᑣৃҹՓ⫼݊Ҫᑣ䗮䖛ݙᆍ ᦤկ㗙ᦤկⱘ᭄ˈৠᯊгৃҹᅮНԴ㞾Ꮕⱘݙᆍᦤկ㗙ᴹ݊Ҫᑨ⫼ᦤկ᭄䆓
䯂᳡ࡵDŽ ݙᆍᦤկ㗙᳝ϔϾᴀⱘᮍ⊩䲚ড়ᴹᐂࡽᑣП䯈ৃҹⳌѦՓ⫼ᄬټ᭄ˈᑨ⫼ ᑣ䗮䖛 ContentResolver ᇍ䈵ৃҹᮍ֓ഄ䇗⫼ݙᆍᦤկ㗙ⱘ᭄ݙᆍDŽ ᑓ᪁ᬊ㗙˄Broadcast Receiver˅˖ϔϾᑓ᪁ᬊ㗙ህᰃৃҹᬊᑓ᪁ᑊ㛑ߎডᑨ ⱘ㒘ӊDŽ Android ㋏㒳Ё᳝⾡ḋⱘᑓ᪁ˈབড⬉∴⬉䞣ব࣪ⱘᑓ᪁DŽϔϾᑨ ⫼ᑣৃҹ䗮䖛ᑓ᪁ᬊᴹⲥҪ݇ᖗⱘᯊ䯈ᑊߎডᑨDŽ ᑓ᪁ᬊ㗙ϡᰒ⼎⫼᠋⬠䴶ϞˈᅗৃҹਃࡼϔϾ⌏ࡼᴹডᑨᶤѯֵᙃDŽ㗙䗮䖛 Notification Managerᴹᦤ⼎⫼᠋ˈҪӀϔ㠀ᬒϔϾᷛ⢊ᗕᷣϞˈ↨བ៥Ӏⱘⷁֵ ֵᙃ⢊ᗕᷣDŽ
3.3 Android ї˔᧘᜶ᮊᄬ͈ᄊᝯᝍ
៥ӀϞ䴶ᓎゟњϔϾᑣ HelloWorldˈ៥Ӏⳟⳟ Android 㞾ࡼᓎゟⱘ᭛ӊݙᆍDŽ 3.3.1 ᯫЏथቡᄊ HelloWorld ዝ ᔧ៥ӀᓎゟϔϾ Helloworld ᑨ⫼ᑣᯊˈ src ᭛ӊ།ЁህӮЎ݊ᓎゟϔϾ⑤ҷⷕ᭛ӊ Helloword.javaˈᠧᓔ᭛ӊ៥Ӏৃҹⳟࠄ䞠䴶ⱘԧݙᆍDŽ 1: package com.android.Helloworld; 2: import android.app.Activity; 3: import android.os.Bundle;4: public class HelloWorld extends Activity { /* ᔧϔ߯ᓎᯊಲ䇗 Activity ᮍ⊩ */ 5: @Override
6: public void onCreate(Bundle savedInstanceState) { 7: super.onCreate(savedInstanceState); 8: setContentView(R.layout.main); 9: } 10: } 1 㸠㸼⼎ࣙⱘৡ⿄DŽ 2ǃ3 㸠ҷⷕᇐܹ Android ⱘࣙˈࣙЁࣙᇚ⫼ࠄⱘ㉏ⱘᅮНDŽ
4̚10 㸠ᰃ HelloWorld ㉏ⱘЏԧˈHelloWorld ㉏㒻ᡓ㞾 ActivityˈAndroid Ё᠔᳝ⱘ⫼᠋ ⬠䴶ሩ⼎ⱘ㉏䛑Ⳉ䯈㒻ᡓ㞾 ActivityDŽ
݊Ё 5̚8 㸠ᰃϔϾ䞡㽕ⱘߑ᭄ˈ䖭Ͼߑ᭄䞡ݭ Actitity Ёⱘ onCreateˈ↣ϔϾ㒻ᡓ㞾
Activityⱘᄤ㉏䛑㽕䞡ݭ䆹ᮍ⊩ᴹ߱ྟ࣪⬠䴶ˈ݊Ё 5 㸠Ё Override 㸼⼎ᮍ⊩ⱘĀ䞡ݭāˈ
ᰃ Java ⱘ݇䬂ᄫˈ 8 㸠䆒㕂њ HelloWorld 䖭Ͼ Activity 㽕ሩ⼎ⱘ⫼᠋⬠䴶ⱘ䜡㕂᭛ӊˈ
R.layout.mainᰃϔϾ䌘⑤ⱘᐌ䞣ˈ䖭Ͼ䌘⑤ᰃᇍ main.xml ⱘϔϾ䯈ᓩ⫼ˈᔧᑣਃࡼᯊᇚ
main.xml᭛ӊЁⱘݙᆍሩ⼎㒭⫼᠋DŽmain.xml ህᰃᬒ res ϟˈlayout ϟ䴶ⱘ᭛ӊ xml Ꮧሔ᭛
ӊˈ៥ӀৃҹⳈՓ⫼ R.layout.main 䖯㸠Ⳉഄᓩ⫼ˈ៥Ӏ㽕خⱘাᰃᡞ䖭Ͼ xml ᭛ӊⱘ㋶ ᓩ㒭 AndroidˈᅗӮ㞾ࡼᐂ៥ӀᡒࠄᑊՓ⫼DŽ
3.3.2 main.xml ࣋ࡍ͈Яࠔ AndroidЁⱘ main.xml Ꮧሔ᭛ӊݙᆍЏ㽕ᰃ᳝݇⫼᠋⬠䴶Ꮧሔ䆒䅵ⱘˈ߽⫼ XML 䇁㿔 ᦣ䗄⫼᠋⬠䴶ˈЏ㽕Ўᑨ⫼ᑣЁՓ⫼ⱘ㒘ӊ䖯㸠ᅮНǃ䆒㕂⬠䴶ሲᗻؐˈҹঞ㒘ӊՓ⫼ⱘ䌘 ⑤খ㗗䆒㕂ㄝDŽ՟བˈᏗሔ᭛ӊЁЎ㒘ӊ䆒㕂ሲᗻ˖ᅮН㒘ӊⱘ ID ো˖android:id="@+id/id ৡ⿄"˗Ꮧሔখ᭄˖android:ሲᗻ= "ሲᗻؐ"ㄝDŽ Ꮧሔ᭛ӊԡѢⳂᔩ res/layout ϟˈℸⳂᔩϟᡒࠄ main.xml ᭛ӊˈঠߏᠧᓔᅗˈᡒࠄ main.xmlҷⷕDŽ <?xml version="1.0" encoding="utf-8"?> //xml᭛ӊ༈ˈ↣Ͼ xml ᭛ӊⱘໄᯢ䇁হˈࣙᣀ⠜ᴀ㓪 ⷕᮍᓣ <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView //᭛ᴀ㒘ӊᦣ䗄 android:layout_width="fill_parent" //฿⒵ሣᐩ android:layout_height="wrap_content" //฿⒵㒘ӊӊ android:text="@string/hello" //ᑨ⫼䌘⑤᭛ӊ /> </LinearLayout> ݊Ёⱘ咥ԧᄫヺ㸼⼎Ꮧሔⱘ݇䬂ᄫˈЏ㽕㸼⼎㒘ӊሣᐩϞⱘᏗሔᅝᥦDŽ 3.3.3 AndroidManifest.xml Яࠔ AndroidManifest.xmlᰃ㋏㒳ⱘࠊ᭛ӊˈᰃᭈϾ乍Ⳃⱘ䜡㕂䌘⑤ˈᅗਞ䆝㋏㒳བԩ໘⧚Դ ᠔߯ᓎⱘ᠔᳝乊ሖ㒘ӊ˄ᇸ݊ᰃ Activitiyǃ᳡ࡵǃIntent ᬊ఼ݙᆍㅵ⧚఼˅DŽᑨ⫼ᑣ䖭 䞠߫ߎ䆹ᑣᅲ⦄ⱘ᠔᳝ࡳ㛑DŽВ՟ᴹ䇈ˈࠊ᭛ӊህᰃᡞԴⱘ⌏ࡼ˄Activities˅㽕ᬊⱘ Intents䖲ϔ䍋ⱘ䖲ᏺDŽ AndroidManifest.xml ᄬѢϔϾᑨ⫼ᑣⳂᔩⱘḍ ⳂᔩЁˈϡ㛑ׂᬍЎ݊Ҫৡ⿄DŽ᭛ӊЁࣙњᑨ⫼ᑣ ⍜ᙃᇍ䈵⫼ࠄⱘ᠔᳝݇㋏ˈা᳝ℸ᭛ӊЁ⊼ݠ䖛ⱘ API ᠡ㛑㹿Փ⫼DŽ Android ᑣᠻ㸠ࠡˈህӮ㦋প AndroidManifest.xml ᭛ӊЁⱘݙᆍˈབᵰᡒϡࠄ䆹᭛ӊ 㗙᭛ӊݙᆍ᳝䇃ˈAndroid ㋏㒳ᇚϡ㛑䖤㸠ᑣDŽ 3-3ᰃ AndroidManifest.xml ⱘݙᆍ㒧ᵘDŽ 3-3 ᦣ䗄њ AndroidManifest.xml ᭛ӊⱘ㒘៤㒧ᵘˈ <manifest> ᭛ӊḍ㡖⚍⫼ᴹᦣ䗄.apk ᭛ӊˈ݊Ё package ࣙሲᗻᖙ乏㒭ߎˈࣙᣀࣙৡ⿄ǃ⠜ᴀোㄝሲᗻDŽpermission ᴗ䰤䇈ᯢ⫼ᴹᅮНࠊ݊Ҫࣙᇍᵓݙⱘ㒘ӊ䆓䯂ⱘᴗ䰤 ᇍ䈵DŽapplication ᑨ⫼ᦣ䗄ᰃᑨ⫼㒘ӊⱘ䇈ᯢ䚼ߚˈࣙ 3-3 manifest permission use-permission instrumentation application activity service receiver provider gᑨ⫼ᑣ gᴗ䰤ࠊ gḍ㡖⚍
њࣙЁⱘ᠔᳝ᑨ⫼㒘ӊⱘሲᗻᦣ䗄ˈབᵰᑨ⫼ЁՓ⫼ⱘ㒘ӊ≵᳝ℸ䇈ᯢ⊼ݠˈ䙷М㋏㒳䖤 㸠ℸᑨ⫼ᑣᯊ᮴⊩ᡒࠄ䖭Ͼᑨ⫼㒘ӊDŽ ϟ䴶ᰃ AndroidManifest.xml ⱘݙᆍ՟ᄤ˖ 1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android=http://schemas.android.com/apk/res/android 3 package="com.android.helloworld "> //ᅮНᑨ⫼ᑣⱘࣙৡ⿄ 4 <application android:icon="@drawable/icon"> 5 <activity //ᅮН⌏ࡼⱘݙᆍ 6 android:name="test" //ᅮН⌏ࡼⱘৡ⿄ 7 android:label="@string/app_name"> //ࠀН Android ᑨ⫼ሮऀᄊಖኤՐሦ 8 <intent-filter> 9 <action android:name="android.intent.action.MAIN" /> 10 <category android:name="android.intent.category.LAUNCHER" /> 11 </intent-filter> 12 </activity> 13 </application> 14 </manifest> 2 㸠<manifest>ܗ㋴ᰃ᭛ӊⱘḍܗ㋴ˈᰃᖙ乏᳝ⱘDŽxmlns:android ᅮНњ Android ⱘੑ ৡぎ䯈ˈՓ⫼ᣛ http://schemas.android.com/apk/res/android ᭛ӊDŽ 3 㸠 package ሲᗻᰃᣛᅮ Android ᑨ⫼᠔ⱘࣙDŽ 4 㸠<application>ܗ㋴ˈ䖭ᰃ䴲ᐌ䞡㽕ⱘϔϾܗ㋴ˈᓔথⱘ㒘ӊ䛑Ӯ䖭Ͼܗ㋴ϟᅮНDŽ 䖭䞠ᰃ Android ᑨ⫼ᑣⱘᷛˈ݊Ё@drawable/icon ᰃϔ⾡䌘⑤ᓩ⫼ᮍᓣˈ㸼⼎䌘⑤㉏ൟᰃ ڣˈ䌘⑤ৡ⿄Ў iconˈᇍᑨⱘ䌘⑤᭛ӊЎ res/drawable Ⳃᔩϟⱘ icon.pngDŽ
5̚12 㸠ᅮН<activity>ᑨ⫼ᑣ㒘ӊˈ䖭Ͼܗ㋴ⱘ⫼ᰃ⊼ݠϔϾ Activity ֵᙃˈ
Activity Android ЁሲѢ㒘ӊˈ䳔㽕ࡳ㛑⏙ऩ᭛ӊЁ䖯㸠䜡㕂DŽ
ࠡ䴶ゴ㡖Ёˈᔧ៥Ӏ߯ᓎϔϾᮄⱘ乍Ⳃⱘᯊˈ᳝ϔϾ䗝Ḛᦤ⼎ᰃ৺ create Activity, ᣛᅮњϔϾᣛᅮⱘ⌏ࡼⱘৡ⿄˄NameActivity˅ˈ㋏㒳㞾ࡼ߯ᓎњϔϾৡЎ NameActivity.java ⱘ᭛ӊDŽ
݊Ё 8̚11 㸠ᰃ Android Intent ᅮНˈintent-filter ᦣ䗄њℸ Activity ਃࡼⱘԡ㕂ᯊ䯈DŽ ↣ᔧϔϾ Activity˄㗙᪡㋏㒳˅㽕ᠻ㸠ϔϾ᪡ᯊˈᅗᇚ߯ᓎߎϔϾ Intent ⱘᇍ䈵ˈ䖭Ͼ
Intentᇍ䈵㛑ᡓ䕑ⱘֵᙃৃᦣ䗄ԴᛇخҔМǃԴᛇ໘⧚ҔМ᭄ǃ᭄ⱘ㉏ൟҹঞϔѯ݊Ҫֵ
ᙃDŽ㗠 Android ߭Ӯ↣Ͼ Application ᦤկⱘ intent-filter ⱘ᭄䖯㸠↨䕗ˈᡒࠄ᳔ড়䗖ⱘ
Activityᴹ໘⧚䇗⫼㗙᠔ᣛᅮⱘ᭄᪡ˈԧᣛ⼎៥Ӏৢ䴶ゴ㡖ҟ㒡DŽ
3.3.4 Х̵ᄊ͈ 1ĕstring.xml ำߑ
resⳂᔩϟ᳝ϔϾ value ᄤⳂᔩˈ݊ϟ᳝ϔϾ string.xml ᭛ӊˈ䖭Ͼ᭛ӊᰃ⫼ᴹᄬᬒ᠔᳝᭛
ᴀֵᙃ᭄ؐⱘDŽ
ϡৠˈ⬠䴶᭛ᄫⱘᰒ⼎ֵᙃህϡৠˈ↨བ䴶Ёⱘ⫼᠋ˈ៥Ӏⱘሣᐩᰒ⼎ህᑨ䆹Փ⫼Ё᭛ֵ ᙃˈ㗠Փ⫼݊Ҫ䇁㿔ⱘ⫼᠋ህ䳔㽕ᴀⱘ䇁㿔ᦤ⼎ˈ᠔ҹ⫼ϔϾ string.xml ᭛ӊᡞ᠔᳝ሣᐩЁ ߎ⦄ⱘ᭛ᄫֵᙃ䛑䲚Ёᄬټˈᔧ䳔㽕ᬍবᑣⱘ᭛ᄫᰒ⼎ᯊˈা䳔ׂᬍ sting.xml ᭛ӊݙᆍˈ ᮴䳔ׂᬍЏᑣDŽ݊ѠˈЏ㽕ᰃЎњޣᇥ᭛ᄫⱘ䞡Փ⫼ˈ䰡Ԣ᭄ݫԭˈᔧϔϾᦤ⼎ֵᙃ䳔 㽕ᑣЁՓ⫼ᯊˈህৃҹᬒ string.xml ᭛ӊЁˈ䳔㽕ⱘᯊা䳔㽕ᓩ⫼ህৃDŽ string.xml᭛ӊ䆺㾷˖ <?xml version="1.0"encoding="utf-8"?> <resources> <string name="hello">HelloWorld,HelloActivity!</string> <string name="app_name">Android,Դདʽ</string> </resources>
↣Ͼ string ᷛㅒໄᯢњϔϾᄫヺІˈname ሲᗻᣛᅮᓩ⫼ৡDŽᷛ⊼˖value ᭛ӊϟৃ᳝Ͼ
xml᭛ӊˈϡৠⱘ㉏߿ৃҹ⫼ϡৠৡᄫⱘ xml ᭛ӊݭˈԚḍܗ㋴ᖙ乏䛑ᰃ<resources>ˈা᳝䖭
ḋᠡ㛑䆚߿䇗⫼䌘⑤DŽ՟བ˖arrays.xmlˈcolors.xmlˈdimens.xml ㄝDŽ 2ĕR.java ำߑ
Androidᑨ⫼ᑣⳂᔩ gen ϟֱᄬⱘᰃ乍Ⳃⱘ᠔᳝ࣙঞ⑤᭛ӊ˄.java˅ˈgen Ⳃᔩϟࣙњ
乍ⳂЁⱘ᠔᳝䌘⑤DŽ
㗠.java Ḑᓣⱘ᭛ӊᰃᓎゟ乍Ⳃᯊ㞾ࡼ⫳៤ⱘˈ䖭Ͼ᭛ӊᰃা䇏ᓣˈϡ㛑ᬍDŽR.java ᭛ӊᰃᅮН䆹乍Ⳃ᠔᳝䌘⑤ⱘ㋶ᓩ᭛ӊDŽ
Sackage com.android.helloworld; public final class R {
public static final class attr { }
public static final class drawable {
public static final int icon=0x7f020000; }
public static final class layout {
public static final int main=0x7f030000; }
public static final class string {
public static final int app_name=0x7f040001; public static final int hello=0x7f040000; } } Ϟ䗄ҷⷕЁᅮНњᕜᐌ䞣ˈᑊϨ䖭ѯᐌ䞣ⱘৡᄫ䛑Ϣ res ᭛ӊ།Ёⱘ᭛ӊৡⳌৠˈ䖭 ᰃЎ.java ᭛ӊЁ᠔ᄬټⱘᰃ䆹乍Ⳃ᠔᳝䌘⑤ⱘ㋶ᓩDŽ᳝њ䖭Ͼ᭛ӊˈᑣЁՓ⫼䌘⑤ᇚ বᕫࡴᮍ֓ˈৃҹᕜᖿഄᡒࠄ㽕Փ⫼ⱘ䌘⑤DŽ⬅Ѣ䖭Ͼ᭛ӊϡ㛑㹿ࡼ㓪䕥ˈ᠔ҹᔧ乍Ⳃ Ёࡴܹᮄⱘ䌘⑤ᯊˈা䳔ࠋᮄϔϟ䆹乍Ⳃˈ.java ᭛ӊ֓㞾ࡼ⫳៤њ᠔᳝䌘⑤ⱘ㋶ᓩDŽ
3.4 ښവલ٨ʽᤂᛡᮊᄬ
ᓔথ⦃๗Ё䖤㸠 Android 乍ⳂˈऩߏᎹᷣⱘĀ䖤㸠āᣝ䪂ˈ䗝ᢽ㦰ऩ Run->Runˈে䬂 HelloWorld 乍Ⳃ᭛ӊ།ˈӮᔍߎ Run As ᇍ䆱Ḛˈ䗝ᢽ Android Applicationˈऩߏ OK ᣝ䪂DŽ䖤㸠ᬜᵰབ 3-4 ᠔⼎DŽ 3-4
3.5 ੪ӊ Android ሮऀ
ᔧϔϾ Android ᑣ㓪ݭᅠ៤ৢˈৃҹᇚᑣᠧࣙˈᮍ֓⿏ࡼᴎϞ䖤㸠ˈAndroid ᪡ ㋏㒳ৃҹᮍ֓ഄᅲ⦄ᠧࣙᑣˈϡӮЎᴎॖଚϡৠᅲ⦄ϡৠⱘᠧࣙᑣˈ䖭ḋৃҹᮍ֓ ᓔথҎਬ䖯㸠ᑣᠧࣙDŽ⫼᠋ Eclipse Ёৃҹᮍ֓ഄᅲ⦄ᑣⱘᠧࣙᎹDŽAndroid ᑨ⫼ᑣՓ⫼ Java خЎᓔ থ䇁㿔DŽaaptᎹᡞ㓪䆥ৢⱘ Java ҷⷕ䖲ৠ݊Ҫᑨ⫼ᑣ䳔㽕ⱘ᭄䌘⑤᭛ӊϔ䍋ᠧࣙࠄ ϔϾ Android ࣙ᭛ӊЁˈ᭛ӊՓ⫼.apk خЎᠽሩৡˈᅗᰃߚথᑨ⫼ᑣᑊᅝ㺙ࠄ⿏ࡼ䆒ⱘ ၦҟˈ⫼᠋া䳔ϟ䕑ᑊᅝ㺙ℸ᭛ӊࠄҪӀⱘ䆒DŽऩϔ.apk ᭛ӊЁⱘ᠔᳝ҷⷕ㹿䅸ЎᰃϔϾ ᑨ⫼ᑣDŽ
వቦ࠵ፇ
ၽ·Ⴣᄯēแਬࠚॴၽ Android ຂහᄯߙोྡྷّё༝ົંԅڶёēဈё༝ٝёͧۃԅ ᅖྑંৃۤำߑdဈё༝ٝё੦થЉೋྻރё༝ӕͧဈԅڶёēඹڶ·Ⴣ༰ēճ Android ё༝ಁޙঠёပྡྷّѺϤԅॴࠓd˸ᮥ 3
1ˊAndroid ᑨ⫼ᑣ㒘ӊ᳝ાѯ˛ 2ˊManifest ᭛ӊⱘЏ㽕⫼˛ 3ˊAndroid ಯ㒘ӊᰃҔМ˛ኄ 4 ቦ Android Activity ̮ፁ
వቦߦ˸ᄬಖ
Activityᆴဈ Activityё༝ԅݮ·ᆦю Activityူ Android ົંᄯᅖྑᆦюϦד Androidำߑࠒٲ4.1 Activity ̮ፁ
Android ㋏㒳ЁˈActivity ᰃϔϾৃ㾕ⱘǃҎᴎѸѦⱘ⬠䴶ˈЏ㽕໘⧚ࠡッџࡵˈᬊ ⫼᠋ⱘࡼᣛҸDŽ Activity ЁᄬᬒϾᰒ⼎ӊˈ䖭ѯӊৃҹᰃᰒ⼎㦰ऩǃϟᢝ㦰ऩǃ᭛ ᴀ䕧ܹㄝDŽᑣⱘ⬠䴶亢Ḑህᰃ Activity 䆒䅵亢ḐDŽActivity ᰃ Android ⱘᴀ㒘៤䚼ߚDŽActivityᰃᦤկ㾚˄View˅ӊ㒬ࠊⱘ⦃๗ˈ៥Ӏৃҹ䅸ЎϔϾ Activity ᰃ㾚㒘ӊⱘ
ϔϾᆍ఼DŽ䗮ᐌᑨ⫼ᑣЁϔϾ Activity ᰃऩ⣀ⱘϔϾሣᐩˈϔϾ Android ᑣᇚ⬅Ͼ
Activityᑣ㒘៤DŽ䗮ᐌϔϾᑨ⫼ᑣЁϔϾਜ⦄㒭⫼᠋ⱘ Activity˄⌏ࡼ˅⿄ЎЏ⌏ࡼ˄Main
Activity˅DŽ
Activity䋳䋷໘⧚㞾Ꮕᔧࠡሣᐩⱘݙᆍˈࣙᣀ⬠䴶ǃ㦰ऩǃ฿ߎ㦰ऩǃᑣᠻ㸠ㄝDŽᔧ៥
ӀҢϔϾሣᐩ⬏䴶ߛᤶࠄϔϾሣᐩ⬏䴶ⱘᯊˈህ⍝ঞњ Activity П䯈ⱘߛᤶDŽ
ᔧ Activity 䖯㸠ߛᤶᯊˈActivity ߛᤶ⌏ࡼ᳝ϸ⾡㉏ൟˈҹᰃ৺䳔㽕Ϣ݊Ҫ Activity Ѹᤶ 䌘᭭ߚЎĀ⣀ゟāActivity ϢĀⳌձāⱘ ActivityDŽϡৠ㉏ൟⱘ Activityˈ݊ࡼгϡሑⳌৠ˖
1ĕ՟ो Activity ݣՎ
⣀ゟⱘ Activity ᰃϡ䳔㽕Ң݊Ҫഄᮍপᕫֵᙃⱘ ActivityDŽাᰃऩ㒃ⱘҢϔϾሣᐩ䏇ࠄϟ Ͼሣᐩˈϡ⍝ঞֵᙃⱘѸᤶDŽҢϔϾ⣀ゟⱘ Activity িϔϾ⣀ゟⱘ Activity ᯊˈ៥Ӏা 㽕฿དᛣ˄Intentˈϔ⾡ᨎᏺখ᭄ֵᙃⱘ Android 㒘ӊ˅ⱘݙᆍࡼˈՓ⫼ startActivity() ߑ ᭄䇗⫼ˈेৃᓎゟ䍋⣀ゟⱘ ActivityDŽ
2ĕອྦྷԅ Activity ݣՎ
Ⳍձⱘ Activity ᰃ䳔㽕Ϣ݊Ҫ Activity Ѹᤶֵᙃⱘϔ⾡ ActivityDŽⳌձⱘ Activity জৃݡ ߚЎऩϢঠ˗ҢϔϾሣᐩ䏇ࠄϟϔϾሣᐩᯊˈᇚӮᡞϔѯখ᭄ᦤկ㒭ϟϔϾሣᐩ˄Activity˅ Փ⫼ˈህᰃऩⳌձⱘ Activity˗㽕ϸϾሣᐩП䯈ߛᤶˈሣᐩϞⱘֵᙃӮϔϾሣᐩⱘ᪡ 㗠ᬍবⱘˈህᰃঠⳌձⱘ ActivityDŽ
ѹथʷ˔ Activity
ᰃৃҹ䇗ᭈⱘDŽ
ϔϾ⌏ࡼⱘにষЁ᳝ᕜৃ㾕ݙᆍˈ៥Ӏ⿄ПЎӊ㗙 Viewˈ䖭ѯ View ϔ㠀᳝ሖ ݇㋏ˈ䛑㒻ᡓ View ㉏DŽ⫼᠋䗮䖛᪡䖭ѯ View ӊᦤѸ㽕∖㦋ᕫ䳔㽕ⱘֵᙃˈℸ Activity Ў⫼᠋ View П䯈ⱘѸѦᦤկњഎഄDŽAndroid ЁгЎᑣᓔথ㗙ᦤկњ䆌ৃҹⳈՓ⫼ ⱘ View ӊˈࣙᣀ buttons˄ᣝ䪂˅ǃtext fields˄᭛ᴀ䕧ܹ˅ǃmenu items˄㦰ऩ䗝乍˅ǃcheck boxes ˄䗝乍˅ㄝ㒘ӊDŽ
1ĕҗߙ Activity
߯ᓎ Activity ᴀ䑿ᕜㅔऩˈ䳔㽕ⱘℹ偸བϟ˖
˄1˅㒻ᡓ Activity ㉏DŽ߯ᓎϔϾ Activityˈᖙ乏㒻ᡓ Activity ㉏݊ᄤ㉏ˈᑊ䞡ݭⳌ݇ⱘ ಲ䇗ߑ᭄ˈ݊Ё᳔䞡㽕ⱘϸϾߑ᭄ᰃ onCreate() onPause()ߑ᭄DŽ
˄2˅ᅲ⦄ Activity ⱘಲ䇗ᮍ⊩˖↨བ onCreate()ᮍ⊩ˈϔᅮ㽕䆄ᕫ䞠䴶ಲ䇗⠊㉏ⱘ
onCreateᮍ⊩ setContentView ᮍ⊩ˈ⬅⠊㉏এᏗሔ⬠䴶DŽᬍݭ onCreate ᮍ⊩ˈҷⷕᅲ՟བϟ˖
package com.TestDemo.activity; import android.app.Activity; import android.os.Bundle;
public class MyActivity01Activity extends Activity { /* ᔧϔ߯ᓎᯊಲ䇗 Activity ᮍ⊩ */ @Override
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.main); }
}
˄3˅߯ᓎ Activity 䞠䴶ԧⱘ View 㒘ӊˈᑊ䆒㕂ᅗӀⱘሲᗻᏗሔᮍᓣDŽ՟བ⏏ࡴ
TextView ӊˈᠧᓔ Layout ᭛ӊϟⱘ main.xmlˈ᠔᳝ⱘӊ䛑㽕ℸ᭛ӊЁ⊼ݠDŽ
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" > <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello, world" /> </LinearLayout> ˄4˅ԧⱘ㒬ࠊ⬠䴶ⱘᎹDŽ 䖭ḋϔϾ Activity ህ߯ᓎདњDŽ߯ᓎདⱘ⌏ࡼ Activity 㽕㛑ℷᐌՓ⫼ˈ䳔㽕ᅠ៤ϟ䴶ϔѯ ᎹDŽ 2ĕರဈ Activity 㽕Փ⫼ Activity г↨䕗ㅔऩˈActivity ⱘՓ⫼᳝ϸ⾡ᮍᓣˈϔᰃЎᑣਃࡼৢሩ⦄ⱘ⬠
䴶˗ѠህᰃҢⱘഄᮍ䇗⫼DŽ ϡㅵᰃા⾡Փ⫼ᮍᓣˈӏԩ Activity 䛑ᖙ乏㽕 AndroidManifest.xml ᭛ӊЁ䖯㸠䜡㕂ˈг ህᰃ⊼ݠ䖛ˈ⊼ݠ䖛ⱘ Activity ᠡ㛑Փ⫼DŽ AndroidMainfest.xml Ё⊼ݠབϟ˖ …… <activity android:name=".MyActivity01Activity" //Activity ㉏ৡ android:label="@string/app_name"> //Activity ᷛㅒ
<intent-filter> //䆹 Activity ⱘᛣ䖛Ⓒֵᙃˈᣛᯢ䆹 Activity ܕ䆌ⱘࡼߚ㉏ <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> 3ĕ୳Վ Activity 䖤㸠ᑣབ 4-1 ᠔⼎ 4-1 4ĕڑΞ Activity
Activity ৃҹ䗮䖛䇗⫼ᅗ㞾Ꮕⱘᮍ⊩ finish()ᴹ݇䯁ˈৠᯊϔϾ Activity ৃҹ䗮䖛ᮍ⊩
finishActivity()ᴹ݇䯁ϔϾ ActivityDŽ
4.2 Activity ၷ֑ևర
᠔䇧਼ᳳህᰃҢᓔྟࠄ㒧ᴳⱘϔϾ䕂ಲˈActivity ⱘЏ㽕ࡳ㛑ᰃϢ⫼᠋ᠧѸ䘧ˈActivity ⱘ⫳ੑ਼ᳳህᰃҢᓎゟϔϾ Activity ࠄ䖭Ͼ Activity ⌏ࡼ㒧ᴳDŽϟ䴶ⱘᰒ⼎њ Activity ⱘ䞡 㽕⢊ᗕ䕀ᤶˈⶽᔶḚ㸼ᯢ Activity ⢊ᗕ䕀ᤶП䯈ⱘಲ䇗ষˈᓔথҎਬৃҹ䞡䕑ᅲ⦄ҹ֓ᠻ 㸠Ⳍ݇ҷⷕˈἁᔶ㸼ᯢ Activity ᠔໘ⱘ⢊ᗕDŽ
4-2 Ёⱘ Activity ϗϾ⫳ੑ਼ᳳߑ᭄˖ void onCreate(Bundle savedInstanceState) void onStart()
void onRestart() void onResume()
void onPause() void onStop() void onDestroy() 4-2 Ң 4-2 ៥Ӏⶹ䘧ˈϔϾ Activity Џ㽕᳝ 4 Ͼ⢊ᗕ˖ ˄1˅䖤㸠⢊ᗕDŽᔧ Activity ሣᐩࠡৄᯊ˄ԡѢᔧࠡӏࡵේᷜⱘ乊䚼˅ˈᅗᰃ⌏䎗䖤㸠 ⱘ⢊ᗕDŽℸᯊᅗᇍᑨ⫼᠋᪡ⱘ Activityˈ↨བ⫼᠋ᦤկֵᙃǃᤩ㦋ᤩ㦋⫼᠋ࡼㄝDŽ ˄2˅᱖ذ⢊ᗕDŽᔧϔϾ Activity ༅এ⛺⚍Ԛҡ✊ᇍ⫼᠋ৃ㾕ᯊˈᅗ໘Ѣ᱖ذ⢊ᗕDŽгህ ᰃ㹿ϔϾ Activity পҷDŽ䖭Ͼ Activity г䆌ᰃ䗣ᯢⱘˈ㗙㛑ᅠܼ䙂㬑ܼሣˈ᠔ҹ㹿᱖ ذˈԚᰃ䖭Ͼ Activity ҡᇍ⫼᠋ৃ㾕DŽ᱖ذⱘ Activity ҡ✊ᰃᄬ⌏⢊ᗕ˄ᅗֱ⬭ⴔ᠔᳝ⱘ⢊ᗕ ៤ਬֵᙃᑊ䖲㟇にষㅵ⧚఼˅ˈԚᔧ㋏㒳໘ѢᵕԢݙᄬⱘᚙމϟˈҡ✊ৃҹᴔ⅏䖭Ͼ ActivityDŽ Activity ᓔྟ onCreate()ᮍ⊩ onStart()ᮍ⊩ onResume()ᮍ⊩ 䖤㸠 Activity ϔϾ Activity ᴹࠄ Activityⱘࠡ䴶 onStop()ᮍ⊩ ⌏ࡼϡݡৃ㾕 onDestroy()ᮍ⊩ ⌏ࡼ㒧ᴳ onRestart()ᮍ⊩ ᴔᥝ䖯 ݊Ҫᑨ⫼ᑣ 䳔㽕ݙᄬ Activity ಲࠄࠡッ Activity ಲࠄࠡッ ⫼᠋ಲࠄ activity⌣㾜 onPause()ᮍ⊩
˄3˅ذℶ⢊ᗕDŽབᵰϔϾ Activity ᅠܼ㹿ϔϾ Activity 㽚Ⲫˈ䙷ᅗ໘Ѣذℶ⢊ᗕDŽᅗ ҡ✊ֱ⬭᠔᳝ⱘ⢊ᗕ៤ਬֵᙃDŽ✊㗠ᅗϡݡ㹿⫼᠋ৃ㾕ˈᅗⱘにষгᇚ㹿䱤㮣ˈབᵰ݊Ҫഄ ᮍ䳔㽕ݙᄬˈ߭㋏㒳㒣ᐌӮᴔ⅏䖭Ͼ ActivityDŽ ˄4˅kill ⢊ᗕDŽབᵰϔϾ Activity ໘Ѣ᱖ذذℶ⢊ᗕˈ㋏㒳ৃҹ䗮䖛㽕∖ᅗ㒧ᴳ˄䇗⫼ ᅗⱘ finish()ᮍ⊩˅Ⳉᴔ⅏ᅗⱘ䖯ᴹᇚᅗ偅ߎݙᄬDŽᔧᅗݡЎ⫼᠋ৃ㾕ⱘᯊˈᅗা 㛑ᅠܼ䞡ᮄਃࡼᑊᘶ㟇ҹࠡⱘ⢊ᗕDŽ Androidㅵ⧚ Activity 䗮䖛িᷜⱘᡔᴃ໘⧚ˈབ 4-3 ᠔⼎DŽ 4-3 ℷ䖤㸠ⱘ Activity ໘ᷜⱘ᳔乊ッˈᅗᰃ䖤㸠⢊ᗕⱘ˗ᔧ᳝ᮄ Activity 䖯ܹሣᐩ᳔Ϟッ ᯊˈॳᴹⱘ Activity ህӮ㹿य़ܹѠሖˈབᵰᅗⱘሣᐩ≵᳝㹿ᅠܼ䙂Ⲫˈ䙷Мᅗ໘Ѣ Pause ⢊ ᗕˈབᵰ㹿䙂Ⲫˈ䙷Мᅗ໘Ѣ Stop ⢊ᗕDŽԚᰃϡㅵᑣᔧࠡ໘Ѣાϔሖˈ䛑ৃ㛑㋏㒳㾝ᕫ 䌘⑤ϡ䎇ᯊ㹿ᔎ㸠݇䯁ˈ໘ᷜᑩⱘᑣ᳔ܜ㹿݇䯁DŽ Ǐ՟ 1ǐ䗮䖛ϔϾ Activity 䆆㾷⫳ੑ਼ᳳ䖛DŽ ϔℹˈ䖤㸠⢊ᗕDŽ བ 4-4 ᠔⼎ˈᔧᓔྟਃࡼᑨ⫼ᑣᯊˈActivity ⫳ੑ਼ᳳЁᠻ㸠ⱘᮍ⊩ᰃ OnCreate()ǃ onStart()Ϣ OnresumeDŽ 4-4
Ѡℹˈ᱖ذ⢊ᗕDŽ 䕧ܹ᭛ᄫৢˈᣝ Home 䬂ˈᑣӮৢৄ䖤㸠ˈᠻ㸠ⱘᮍ⊩Ӯᰃ˖onPause()ˈonStop()DŽ ᔧݡਃࡼ䆹ᑣˈᠻ㸠ⱘᮍ⊩Ӯᰃ˖onRestart()ˈonStart()ˈonResume()ˈᑊϨ߮ᠡ䕧ܹⱘ᭛ ᄫӮᰒ⼎᭛ᴀḚ䞠ˈབ 4-5 ᠔⼎DŽ 4-5 ϝℹˈذℶ⢊ᗕDŽ ᣝಲ䗔䬂ˈӮ䗔ߎᑣˈᠻ㸠ⱘᮍ⊩ᰃ˖onPause()ˈonStop()ˈonDestroy()DŽ ݡᠻ㸠䆹ᑣˈӮᠻ㸠ⱘᮍ⊩˖onStart()Ϣ Onresumeˈ⌏ࡼ䞡ᮄ㹿߯ᓎⱘDŽ
వቦ࠵ፇ
·Ⴣᅖྑࠚॴ Android ຂහᄯങӖᆦߑᄍྡྷ Activity ݣՎԅᅖྑᄉಭēࠚॴ Activity ԅಓᄻڶёcؠྻރֺ֥d
