要计算Android Room数据库的平均查询时间,可以使用以下步骤:
@Entity(tableName = "data")
public class DataEntity {
@PrimaryKey(autoGenerate = true)
public int id;
public String name;
public String value;
}
@Dao
public interface DataDao {
@Query("SELECT * FROM data")
List getAllData();
}
@Database(entities = {DataEntity.class}, version = 1)
public abstract class AppDatabase extends RoomDatabase {
public abstract DataDao dataDao();
}
long startTime = System.currentTimeMillis();
AppDatabase db = Room.databaseBuilder(getApplicationContext(),
AppDatabase.class, "database-name").build();
DataDao dao = db.dataDao();
List data = dao.getAllData();
long endTime = System.currentTimeMillis();
long totalTime = endTime - startTime;
long averageTime = totalTime / data.size();
以上是使用Android Room数据库按毫秒计算平均查询时间的解决方法。