Android greendao 的基本使用
阿新 • • 發佈:2018-12-14
1.新增依賴
在bulid.gradle檔案下的dependencies下新增所需依賴
compile 'org.greenrobot:greendao:3.2.2' // add library
compile 'org.greenrobot:greendao-generator:3.2.2'
2.在bulid.gradle下進行配置
apply plugin: 'org.greenrobot.greendao' buildscript { repositories { mavenCentral() } dependencies { classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' } }
3.對greendao的generator生成檔案進行配置
greendao {
schemaVersion 1 //版本
daoPackage '生成檔案包名' // 一般為app包名+生成檔案的資料夾名
targetGenDir 'src/main/java' //生成檔案路徑
}
4.建立實體類,生成dao檔案
@Entity public class dayStep { @Id private long id; private String date; private int step; private Long sportId; }
具體的欄位根據不同的需要進行修改
接下來就進行編譯 得到三個greendao自動生成的類
在application中進行呼叫就好,話不多說 直接上程式碼
public class MyApplication extends Application{ private final static String DB_NAME = "test.db"; private static DaoSession daoSession; @Override public void onCreate() { super.onCreate(); initGreenDao(); } private void initGreenDao() { //1、獲取DevOpenHelper 物件 2、獲取資料庫物件 構建DaoMaster物件 3、構建DaoSession 物件 DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this, DB_NAME); SQLiteDatabase database = helper.getWritableDatabase(); DaoMaster daoMaster = new DaoMaster(database); daoSession = daoMaster.newSession(); } public static DaoSession getDaoSession() { return daoSession; } }
接下來就直接進行呼叫就好
public class MainActivity extends AppCompatActivity {
private UserDao userDao;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
test();
testSearch();
}
private void init() {
DaoSession daoSession = MyApplication.getDaoSession();
userDao = daoSession.getUserDao();
}
private void testSearch() {
List<User> users = userDao.loadAll();
for (int i = 0; i < users.size(); i++) {
User user = users.get(i);
Log.e("myMessage"," name = "+user.getName());
}
}
private void test() {
User user = new User();
user.setName("yangruixiang");
user.setId(01l);
userDao.insert(user);
}
}
(部分為複製其他部落格,並進行了一些修改)
地址如下