{"id":1313,"date":"2025-05-23T08:04:07","date_gmt":"2025-05-22T23:04:07","guid":{"rendered":"https:\/\/itstudy365.com\/blog\/?p=1313"},"modified":"2025-05-27T22:02:04","modified_gmt":"2025-05-27T13:02:04","slug":"android-application-development-%e7%ac%ac23%e7%ab%a0%ef%bc%9ajava%e3%82%a8%e3%83%b3%e3%82%b8%e3%83%8b%e3%82%a2%e3%81%ab%e5%90%91%e3%81%91%e3%81%9fdi%e3%81%ae%e5%be%a9%e7%bf%92","status":"publish","type":"post","link":"https:\/\/itstudy365.com\/blog\/2025\/05\/23\/android-application-development-%e7%ac%ac23%e7%ab%a0%ef%bc%9ajava%e3%82%a8%e3%83%b3%e3%82%b8%e3%83%8b%e3%82%a2%e3%81%ab%e5%90%91%e3%81%91%e3%81%9fdi%e3%81%ae%e5%be%a9%e7%bf%92\/","title":{"rendered":"Android application development \u7b2c23\u7ae0\uff1aJava\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u5411\u3051\u305fDI\u306e\u5fa9\u7fd2"},"content":{"rendered":"\n<button id=\"bb1\" type=\"button\" value=\"Play\" class=\"responsivevoice-button\" title=\"ResponsiveVoice Tap to Start\/Stop Speech\"><span>&#128266; Play<\/span><\/button>\n        <script>\n            bb1.onclick = function(){\n                if(responsiveVoice.isPlaying()){\n                    responsiveVoice.cancel();\n                }else{\n                    responsiveVoice.speak(\"\ud83d\udd27 \u305d\u3082\u305d\u3082DI\uff08\u4f9d\u5b58\u6027\u6ce8\u5165\uff09\u3068\u306f\uff1f DI\uff08Dependency Injection\uff09\u3068\u306f\u3001\u300c\u3042\u308b\u30af\u30e9\u30b9\u304c\u5fc5\u8981\u3068\u3059\u308b\u4ed6\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u4f9d\u5b58\u7269\uff09\u3092\u3001\u81ea\u5206\u3067\u4f5c\u308b\u306e\u3067\u306f\u306a\u304f\u5916\u90e8\u304b\u3089\u63d0\u4f9b\u3057\u3066\u3082\u3089\u3046\u8a2d\u8a08\u624b\u6cd5\u300d\u3067\u3059\u3002 \u274c \u5f93\u6765\u306e\u66f8\u304d\u65b9\uff08\u5bc6\u7d50\u5408\uff09 public class UserService { private final UserRepository repository = new UserRepository(); \/\/ \u2190 \u81ea\u5206\u3067\u4f9d\u5b58\u3092\u751f\u6210\u3057\u3066\u3057\u307e\u3063\u3066\u3044\u308b } \u2705 DI\u3092\u4f7f\u3063\u305f\u66f8\u304d\u65b9\uff08\u758e\u7d50\u5408\uff09 public class UserService { private final UserRepository repository; public UserService(UserRepository repository) { this.repository = repository; \/\/ \u2190 \u5916\u90e8\u304b\u3089\u6ce8\u5165\u3057\u3066\u3082\u3089\u3046 } } \u3053\u306e\u3088\u3046\u306b\u3059\u308b\u3068\u3001\u30c6\u30b9\u30c8\u3057\u3084\u3059\u304f\u306a\u308a\u3001\u4f9d\u5b58\u95a2\u4fc2\u306e\u5909\u66f4\u306b\u3082\u5f37\u304f\u306a\u308a\u307e\u3059\u3002 \ud83e\uddf1 Android\u3067DI\u304c\u91cd\u8981\u306a\u7406\u7531 Java\u3067\u306fSpring\u306e\u3088\u3046\u306aDI\u30b3\u30f3\u30c6\u30ca\u3092\u4f7f\u3046\u3053\u3068\u3067DI\u304c\u5f53\u305f\u308a\u524d\u306b\u306a\u308a\u307e\u3059\u304c\u3001Android\u3067\u306f\u660e\u793a\u7684\u306bDI\u306e\u8a2d\u8a08\u3092\u610f\u8b58\u3057\u306a\u3044\u3068\u3001\u3059\u3050\u306b\u5bc6\u7d50\u5408\u306a\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002 \u307e\u305f\u3001Android\u30a2\u30d7\u30ea\u3067\u306f\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u304c\u8907\u96d1\u306a\u305f\u3081\u3001\u30b9\u30b3\u30fc\u30d7\uff08Activity\u5358\u4f4d\u30fb\u30a2\u30d7\u30ea\u5168\u4f53\u306a\u3069\uff09\u3092\u610f\u8b58\u3057\u305f\u4f9d\u5b58\u6027\u7ba1\u7406\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002 \ud83e\uddf0 Android\u3067\u306eDI\u306e\u624b\u6bb5 1. \u624b\u52d5DI\uff08\u57fa\u672c\u5f62\uff09 \u6700\u521d\u306f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3084\u30bb\u30c3\u30bf\u30fc\u3067\u624b\u52d5\u3067\u4f9d\u5b58\u6027\u3092\u6e21\u3059\u5f62\u3067\u3082\u5341\u5206\u5b66\u3079\u307e\u3059\u3002 public class MainViewModel { private final TaskRepository repository; public MainViewModel(TaskRepository repository) { this.repository = repository; } } Activity \u304b\u3089 ViewModel \u3092\u751f\u6210\u3059\u308b\u969b\u306b\u6e21\u3059\uff1a TaskRepository repository = new TaskRepository(); MainViewModel vm = new MainViewModel(repository); 2. Dagger2 \/ Hilt \u3092\u4f7f\u3063\u305f\u81ea\u52d5DI Dagger2 \u306f Google \u516c\u5f0f\u306e DI \u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3001Hilt \u306f\u305d\u306e\u4e0a\u306b\u69cb\u7bc9\u3055\u308c\u305f\u7c21\u6613\u5316\u3055\u308c\u305f DI \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u3002 Hilt \u306e\u69cb\u6210\u4f8b @HiltAndroidApp public class MyApp extends Application { } @AndroidEntryPoint public class MainActivity extends AppCompatActivity { @Inject TaskRepository repository; \/\/ \u2190 Hilt\u304c\u6ce8\u5165\u3057\u3066\u304f\u308c\u308b } \u4f9d\u5b58\u95a2\u4fc2\u3092\u63d0\u4f9b\u3059\u308b\u30af\u30e9\u30b9\uff1a @Module @InstallIn(SingletonComponent.class) public class RepositoryModule { @Provides public static TaskRepository provideRepository() { return new TaskRepository(); } } \ud83d\udca1 Hilt\u306f\u3001Spring\u3067\u3044\u3046\u3068\u3053\u308d\u306e@Autowired\u3084@ComponentScan\u306e\u3088\u3046\u306a\u81ea\u52d5\u6ce8\u5165\u3092\u3001Android\u5411\u3051\u306b\u6700\u9069\u5316\u3057\u305f\u4ed5\u7d44\u307f\u3060\u3068\u8003\u3048\u308b\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002 \ud83c\udfaf Java\u30a8\u30f3\u30b8\u30cb\u30a2\u5411\u3051\u88dc\u8db3 Java\uff08Spring\u306a\u3069\uff09Android\uff08Hilt\/Dagger\u306a\u3069\uff09@Autowired@Inject@Component@Module + @Provides\u30b3\u30f3\u30c6\u30ca\uff1aSpring\u30b3\u30f3\u30c6\u30ca\uff1aHilt\/Dagger \u30b9\u30b3\u30fc\u30d7\u306e\u5236\u5fa1\uff08@Singleton \u306a\u3069\uff09\u3082Hilt\u3067\u53ef\u80fd\u3067\u3059\u3002 Android\u3067\u306fActivity\u30b9\u30b3\u30fc\u30d7\u3001ViewModel\u30b9\u30b3\u30fc\u30d7\u3001Application\u30b9\u30b3\u30fc\u30d7\u306a\u3069\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002 \u2705 \u307e\u3068\u3081 DI\u3068\u306f\u300c\u4f9d\u5b58\u6027\u3092\u5916\u304b\u3089\u6e21\u3059\u300d\u8a2d\u8a08\u624b\u6cd5\u3002 Android\u3067\u306f\u758e\u7d50\u5408\u306a\u8a2d\u8a08\u3092\u5b9f\u73fe\u3057\u3001\u30c6\u30b9\u30c8\u53ef\u80fd\u6027\u30fb\u62e1\u5f35\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u91cd\u8981\u3002 \u307e\u305a\u306f\u624b\u52d5DI\u3067\u7406\u89e3\u3092\u6df1\u3081\u3001\u305d\u306e\u5f8c Hilt \u306b\u3088\u308b\u81ea\u52d5DI\u306b\u79fb\u884c\u3057\u3066\u3044\u304f\u3068\u30b9\u30e0\u30fc\u30ba\u3002\", \"Japanese Female\");\n                }\n            };\n        <\/script>\n    <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd27 \u305d\u3082\u305d\u3082DI\uff08\u4f9d\u5b58\u6027\u6ce8\u5165\uff09\u3068\u306f\uff1f<\/h2>\n\n\n\n<p>DI\uff08Dependency Injection\uff09\u3068\u306f\u3001\u300c\u3042\u308b\u30af\u30e9\u30b9\u304c\u5fc5\u8981\u3068\u3059\u308b\u4ed6\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u4f9d\u5b58\u7269\uff09\u3092\u3001\u81ea\u5206\u3067\u4f5c\u308b\u306e\u3067\u306f\u306a\u304f<strong>\u5916\u90e8\u304b\u3089\u63d0\u4f9b\u3057\u3066\u3082\u3089\u3046<\/strong>\u8a2d\u8a08\u624b\u6cd5\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c \u5f93\u6765\u306e\u66f8\u304d\u65b9\uff08\u5bc6\u7d50\u5408\uff09<\/h3>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-csharp\" data-lang=\"C#\" data-show-lang=\"0\"><code>public class UserService {\n    private final UserRepository repository = new UserRepository(); \/\/ \u2190 \u81ea\u5206\u3067\u4f9d\u5b58\u3092\u751f\u6210\u3057\u3066\u3057\u307e\u3063\u3066\u3044\u308b\n}<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 DI\u3092\u4f7f\u3063\u305f\u66f8\u304d\u65b9\uff08\u758e\u7d50\u5408\uff09<\/h3>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-csharp\" data-lang=\"C#\" data-show-lang=\"0\"><code>public class UserService {\n    private final UserRepository repository;\n\n    public UserService(UserRepository repository) {\n        this.repository = repository; \/\/ \u2190 \u5916\u90e8\u304b\u3089\u6ce8\u5165\u3057\u3066\u3082\u3089\u3046\n    }\n}<\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3059\u308b\u3068\u3001\u30c6\u30b9\u30c8\u3057\u3084\u3059\u304f\u306a\u308a\u3001\u4f9d\u5b58\u95a2\u4fc2\u306e\u5909\u66f4\u306b\u3082\u5f37\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\uddf1 Android\u3067DI\u304c\u91cd\u8981\u306a\u7406\u7531<\/h2>\n\n\n\n<p>Java\u3067\u306fSpring\u306e\u3088\u3046\u306aDI\u30b3\u30f3\u30c6\u30ca\u3092\u4f7f\u3046\u3053\u3068\u3067DI\u304c\u5f53\u305f\u308a\u524d\u306b\u306a\u308a\u307e\u3059\u304c\u3001<strong>Android\u3067\u306f\u660e\u793a\u7684\u306bDI\u306e\u8a2d\u8a08\u3092\u610f\u8b58\u3057\u306a\u3044\u3068\u3001\u3059\u3050\u306b\u5bc6\u7d50\u5408\u306a\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<p>\u307e\u305f\u3001Android\u30a2\u30d7\u30ea\u3067\u306f\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u304c\u8907\u96d1\u306a\u305f\u3081\u3001<strong>\u30b9\u30b3\u30fc\u30d7\uff08Activity\u5358\u4f4d\u30fb\u30a2\u30d7\u30ea\u5168\u4f53\u306a\u3069\uff09\u3092\u610f\u8b58\u3057\u305f\u4f9d\u5b58\u6027\u7ba1\u7406<\/strong>\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\uddf0 Android\u3067\u306eDI\u306e\u624b\u6bb5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>\u624b\u52d5DI\uff08\u57fa\u672c\u5f62\uff09<\/strong><\/h3>\n\n\n\n<p>\u6700\u521d\u306f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3084\u30bb\u30c3\u30bf\u30fc\u3067\u624b\u52d5\u3067\u4f9d\u5b58\u6027\u3092\u6e21\u3059\u5f62\u3067\u3082\u5341\u5206\u5b66\u3079\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-csharp\" data-lang=\"C#\" data-show-lang=\"0\"><code>public class MainViewModel {\n    private final TaskRepository repository;\n\n    public MainViewModel(TaskRepository repository) {\n        this.repository = repository;\n    }\n}<\/code><\/pre><\/div>\n\n\n\n<p><code>Activity<\/code> \u304b\u3089 ViewModel \u3092\u751f\u6210\u3059\u308b\u969b\u306b\u6e21\u3059\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-csharp\" data-lang=\"C#\" data-show-lang=\"0\"><code>TaskRepository repository = new TaskRepository();\nMainViewModel vm = new MainViewModel(repository);<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>Dagger2 \/ Hilt \u3092\u4f7f\u3063\u305f\u81ea\u52d5DI<\/strong><\/h3>\n\n\n\n<p>Dagger2 \u306f Google \u516c\u5f0f\u306e DI \u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3001Hilt \u306f\u305d\u306e\u4e0a\u306b\u69cb\u7bc9\u3055\u308c\u305f<strong>\u7c21\u6613\u5316\u3055\u308c\u305f DI \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Hilt \u306e\u69cb\u6210\u4f8b<\/h4>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-csharp\" data-lang=\"C#\" data-show-lang=\"0\"><code>@HiltAndroidApp\npublic class MyApp extends Application { }\n\n@AndroidEntryPoint\npublic class MainActivity extends AppCompatActivity {\n    @Inject\n    TaskRepository repository; \/\/ \u2190 Hilt\u304c\u6ce8\u5165\u3057\u3066\u304f\u308c\u308b\n}<\/code><\/pre><\/div>\n\n\n\n<p>\u4f9d\u5b58\u95a2\u4fc2\u3092\u63d0\u4f9b\u3059\u308b\u30af\u30e9\u30b9\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-csharp\" data-lang=\"C#\" data-show-lang=\"0\"><code>@Module\n@InstallIn(SingletonComponent.class)\npublic class RepositoryModule {\n    @Provides\n    public static TaskRepository provideRepository() {\n        return new TaskRepository();\n    }\n}<\/code><\/pre><\/div>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p>\ud83d\udca1 Hilt\u306f\u3001Spring\u3067\u3044\u3046\u3068\u3053\u308d\u306e<code>@Autowired<\/code>\u3084<code>@ComponentScan<\/code>\u306e\u3088\u3046\u306a\u81ea\u52d5\u6ce8\u5165\u3092\u3001Android\u5411\u3051\u306b\u6700\u9069\u5316\u3057\u305f\u4ed5\u7d44\u307f\u3060\u3068\u8003\u3048\u308b\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udfaf Java\u30a8\u30f3\u30b8\u30cb\u30a2\u5411\u3051\u88dc\u8db3<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Java\uff08Spring\u306a\u3069\uff09<\/th><th>Android\uff08Hilt\/Dagger\u306a\u3069\uff09<\/th><\/tr><\/thead><tbody><tr><td><code>@Autowired<\/code><\/td><td><code>@Inject<\/code><\/td><\/tr><tr><td><code>@Component<\/code><\/td><td><code>@Module<\/code> + <code>@Provides<\/code><\/td><\/tr><tr><td>\u30b3\u30f3\u30c6\u30ca\uff1aSpring<\/td><td>\u30b3\u30f3\u30c6\u30ca\uff1aHilt\/Dagger<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul>\n<li>\u30b9\u30b3\u30fc\u30d7\u306e\u5236\u5fa1\uff08<code>@Singleton<\/code> \u306a\u3069\uff09\u3082Hilt\u3067\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li>Android\u3067\u306f<strong>Activity\u30b9\u30b3\u30fc\u30d7\u3001ViewModel\u30b9\u30b3\u30fc\u30d7\u3001Application\u30b9\u30b3\u30fc\u30d7<\/strong>\u306a\u3069\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 \u307e\u3068\u3081<\/h2>\n\n\n\n<ul>\n<li><strong>DI\u3068\u306f\u300c\u4f9d\u5b58\u6027\u3092\u5916\u304b\u3089\u6e21\u3059\u300d\u8a2d\u8a08\u624b\u6cd5\u3002<\/strong><\/li>\n\n\n\n<li><strong>Android\u3067\u306f\u758e\u7d50\u5408\u306a\u8a2d\u8a08\u3092\u5b9f\u73fe\u3057\u3001\u30c6\u30b9\u30c8\u53ef\u80fd\u6027\u30fb\u62e1\u5f35\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u91cd\u8981\u3002<\/strong><\/li>\n\n\n\n<li><strong>\u307e\u305a\u306f\u624b\u52d5DI\u3067\u7406\u89e3\u3092\u6df1\u3081\u3001\u305d\u306e\u5f8c Hilt \u306b\u3088\u308b\u81ea\u52d5DI\u306b\u79fb\u884c\u3057\u3066\u3044\u304f\u3068\u30b9\u30e0\u30fc\u30ba\u3002<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[54],"_links":{"self":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1313"}],"collection":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/comments?post=1313"}],"version-history":[{"count":2,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1313\/revisions"}],"predecessor-version":[{"id":1410,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1313\/revisions\/1410"}],"wp:attachment":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/media?parent=1313"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/categories?post=1313"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/tags?post=1313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}