要动态决定要搜索哪些表,可以使用Android Room的查询构建器(Query Builder)来构建动态查询。以下是一个示例代码,演示了如何根据条件动态决定要搜索哪些表:
- 首先,创建一个接口来定义查询方法:
@Dao
public interface MyDao {
@Query("SELECT * FROM table1")
List getTable1Data();
@Query("SELECT * FROM table2")
List getTable2Data();
}
- 创建一个类来管理查询方法:
public class DatabaseManager {
private MyDao myDao;
private boolean searchTable1;
private boolean searchTable2;
public DatabaseManager(MyDao myDao) {
this.myDao = myDao;
}
public void setSearchTables(boolean searchTable1, boolean searchTable2) {
this.searchTable1 = searchTable1;
this.searchTable2 = searchTable2;
}
public List