{"id":975,"date":"2023-03-11T20:38:42","date_gmt":"2023-03-11T12:38:42","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=975"},"modified":"2023-04-29T13:25:58","modified_gmt":"2023-04-29T05:25:58","slug":"configuration-and-use-of-greendao-3","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/11\/configuration-and-use-of-greendao-3\/","title":{"rendered":"GreenDao 3 \u7684\u914d\u7f6e\u53ca\u4f7f\u7528"},"content":{"rendered":"

GreenDao\u662f\u4e00\u4e2a\u4f18\u8d28\u7684\u5f00\u6e90\u6570\u636e\u5e93\uff0c\u6bcf\u79d2\u652f\u6301\u4e0a\u5343\u6b21\u7684\u589e\u5220\u6539\u67e5\uff0c\u6548\u7387\u975e\u5e38\u9ad8\u3002\u66f4\u591a\u8be6\u7ec6\u4ecb\u7ecd\uff1ahttps:\/\/github.com\/greenrobot\/greenDAO<\/a><\/p>\n

\u4f9d\u8d56\u914d\u7f6e<\/h2>\n

<\/p>\n

\/\/ In your root build.gradle file:\nbuildscript {\n    repositories {\n        jcenter()\n        mavenCentral() \/\/ add repository\n    }\n    dependencies {\n        classpath 'com.android.tools.build:gradle:3.1.1'\n        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' \/\/ add plugin\n    }\n}\n\n\/\/ In your app projects build.gradle file:\napply plugin: 'com.android.application'\napply plugin: 'org.greenrobot.greendao' \/\/ apply plugin\n\nandroid {\n    ...\n\n    \/\/ \u914d\u7f6e\u6570\u636e\u5e93\n    greendao {\n        \/\/ \u6570\u636e\u5e93\u7248\u672c\u53f7\n        schemaVersion 1\n        \/\/ \u6570\u636e\u5e93\u6240\u5728\u5305\n        daoPackage 'me.yezhou.lib.app_base.db.dao'\n        \/\/ \u751f\u6210\u7684\u6570\u636e\u5e93\u6587\u4ef6\u7684\u76ee\u5f55\n        targetGenDir 'src\/main\/java'\n        \/\/ \u81ea\u52a8\u751f\u6210\u5355\u5143\u6d4b\u8bd5\n        \/\/ generateTests true\n        \/\/ \u751f\u6210\u7684\u5355\u5143\u6d4b\u8bd5\u76ee\u5f55\n        \/\/ targetGenDirTests\n    }\n}\n\ndependencies {\n    implementation 'org.greenrobot:greendao:3.2.2' \/\/ add library\n}<\/code><\/pre>\n
\u5b9e\u4f53\u6a21\u578b<\/h2>\n
\u5168\u90e8\u914d\u7f6e\u6210\u529f\u4e4b\u540e\uff0c\u5efa\u7acb\u6570\u636e\u5e93\u5b9e\u4f53\u6a21\u578b<\/p>\n
@Entity\npublic class Student {\n\n    @Id(autoincrement = true)\n    private Long _id;  \/\/\u52a1\u5fc5\u4f7f\u7528\u5bf9\u8c61\u7c7b\u578bLong\uff0c\u4e0d\u7528\u57fa\u672c\u6570\u636e\u7c7b\u578blong\n\n    @Unique\n    @NotNull\n    @Property(nameInDb = "username")\n    private String name;\n\n    @NotNull\n    private String age;\n\n    @Transient\n    private String info;\n\n    @Property(nameInDb = "country_id")\n    private Long countryId;\n    @ToOne(joinProperty = "countryId")\n    private Region country;\n}<\/code><\/pre>\n
\u6ce8\u89e3\u89e3\u6790<\/p>\n
    \n
  • @Entity<\/code>\uff1a\u6807\u8bb0\u8be5\u7c7b\u4e3a\u6570\u636e\u5e93\u5b9e\u4f53\u6a21\u578b\uff0c\u6307\u793aGreendDao\u751f\u6210\u4ee3\u7801<\/li>\n
  • @Id(autoincrement = true)<\/code>\uff1a\u914d\u7f6eid\u81ea\u589e<\/li>\n
  • @Unique<\/code>\uff1a\u5b57\u6bb5\u7ea6\u675f\uff0c\u4fdd\u8bc1\u503c\u552f\u4e00<\/li>\n
  • @NotNull<\/code>\uff1a\u5b57\u6bb5\u4e0d\u5141\u8bb8\u4e3a\u7a7a<\/li>\n
  • @Property(nameInDb = "username")<\/code>\uff1a\u8bbe\u7f6e\u8be5\u5217\u540d\u975e\u9ed8\u8ba4\uff0c\u91c7\u7528\u81ea\u5b9a\u4e49<\/li>\n
  • @Transient<\/code>\uff1a\u8bbe\u7f6e\u8be5\u952e\u5728\u6570\u636e\u5e93\u4e2d\u6392\u9664<\/li>\n
  • @ToOne(joinProperty = "countryId")<\/code>\uff1a\u5173\u8054\u53e6\u4e00\u5b9e\u4f53\u5e76\u6307\u5b9a\u5916\u8054\u952e<\/li>\n<\/ul>\n
    \u6784\u5efa\u4ee3\u7801<\/h2>\n
    \u5b8c\u6210\u521b\u5efa\u4e4b\u540e\uff0c\u70b9\u51fbSync Progect<\/code>\u6216GreenDao\u81ea\u5e26\u7684Gradle\u547d\u4ee4\uff0cGreenDao\u5c06\u4f1a\u81ea\u52a8\u751f\u6210\u4ee3\u7801\uff1a<\/p>\n
      \n
    • DaoMaster<\/code>\uff1a\u8be5\u7c7b\u4fdd\u5b58\u4e86\u6570\u636e\u5e93\u5bf9\u8c61\uff08SQLiteDatabase\uff09\uff0c\u5b83\u7684\u5185\u90e8\u7c7bOpenHelper\u548cDevOpenHelper\u662fSQLiteOpenHelper\u7684\u5b9e\u73b0<\/li>\n
    • DaoSession<\/code>\uff1a\u63d0\u4f9b\u5bf9\u6570\u636e\u5e93\u8fdb\u884c\u589e\u5220\u6539\u67e5\u7684\u65b9\u6cd5<\/li>\n
    • StudentDao<\/code>\uff1aGreenDao\u5bf9\u5e94\u4e8e\u6bcf\u4e2a\u5b9e\u4f53\u751f\u6210\u7684\u7c7b\uff0c\u5373\u914d\u7f6e@Entity<\/code>\u6807\u6ce8\u7684\u7c7b<\/li>\n<\/ul>\n
      \u7279\u522b\u6ce8\u610f\uff0c\u4e0d\u8981\u8f7b\u6613\u6539\u52a8\u81ea\u52a8\u751f\u6210\u7684\u4ee3\u7801\u3002<\/p>\n
      \u521d\u59cb\u5316<\/h2>\n
      \u521d\u59cb\u5316\u6838\u5fc3\u5bf9\u8c61<\/p>\n
      public class GreenDaoHelper {\n\n    private static DaoMaster.DevOpenHelper mHelper;\n    private static SQLiteDatabase mDatabase;\n    private static DaoMaster mDaoMaster;\n    private static DaoSession mDaoSession;\n\n    \/**\n     * \u8bbe\u7f6eGreenDao\n     *\/\n    public static void initDatabase() {\n        mHelper = new DaoMaster.DevOpenHelper(MyApp.mContext, "student.db", null);\n        mDatabase = mHelper.getWritableDatabase();\n        mDaoMaster = new DaoMaster(mDatabase);\n        mDaoSession = mDaoMaster.newSession();\n    }\n\n    public static DaoSession getDaoSession() {\n        return mDaoSession;\n    }\n\n    public static SQLiteDatabase getDatabase() {\n        return mDatabase;\n    }\n}<\/code><\/pre>\n
      \u5728Appliction\u4e2d\u5e94\u7528<\/p>\n
      public class MyApp extends Application {\n\n    public static Context mContext;\n\n    @Override\n    public void onCreate() {\n        super.onCreate();\n        mContext = getApplicationContext();\n        GreenDaoHelper.initDatabase();\n    }\n}<\/code><\/pre>\n
      \u6570\u636e\u5e93\u64cd\u4f5c<\/h2>\n
      \/\/\u83b7\u53d6\u6570\u636e\u5e93\u5bf9\u8c61\nmStudentDao = GreenDaoHelper.getDaoSession().getStudentDao();\n\n\/\/\u63d2\u5165\u4e00\u6761\u6570\u636e\uff0c\u4f20\u5165null\uff0cid\u4f1a\u81ea\u589e\nmStudentDao.insert(new Student(null, "Joe.Ye", "28"));\n\n\/\/\u5220\u9664\u4e00\u6761\u6570\u636e\nmStudentDao.delete(new Student(null, "Joe.Ye", "28"));\n\n\/\/\u6839\u636e\u4e3b\u952e\u5220\u9664\u4e00\u6761\u6570\u636e\nmStudentDao.deleteByKey(1L);\n\n\/\/\u5220\u9664\u5168\u90e8\u6570\u636e\nmStudentDao.deleteAll();\n\n\/\/\u4fee\u6539\u4e00\u6761\u6570\u636e\nmStudentDao.update(new Student(null, "Joe.Ye", "25"));\n\n\/\/\u67e5\u8be2\u5168\u90e8\u6570\u636e\nmStudentDao.loadAll();\n\n\/\/\u67e5\u8be2\u4e00\u6761\u6570\u636e\uff0cwhere\u4e2d\u586b\u5199\u6761\u4ef6\nmStudentDao.queryBuilder().where(StudentDao.Properties.Name.eq("Joe.Ye")).unique();<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
      GreenDao\u662f\u4e00\u4e2a\u4f18\u8d28\u7684\u5f00\u6e90\u6570\u636e\u5e93\uff0c\u6bcf\u79d2\u652f\u6301\u4e0a\u5343\u6b21\u7684\u589e\u5220\u6539\u67e5\uff0c\u6548\u7387\u975e\u5e38\u9ad8\u3002\u66f4\u591a\u8be6\u7ec6\u4ecb\u7ecd\uff1ahttps:\/\/g […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[205],"tags":[204],"class_list":["post-975","post","type-post","status-publish","format-standard","hentry","category-android-database-library","tag-greendao"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=975"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/975\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}