Android 数据库操作（SQLite）
- [Android 数据库操作（SQLite）](#Android 数据库操作（SQLite）)
Android 数据库操作（SQLite）
数据库封装，方便使用。实现了数据库拷贝，实体类注解配置表及字段，并实现数据封装返回实体类，简化了sql编写和对游标的操作。
动态预览
使用
初始化
QuickDb dbHelper;
dbHelper = new QuickDb(this, "quick_db1.db", "quick_db2.db", null, 10, this);
生成表
dbHelper.createTable(User.class);
实体类
@DBTable(name = "user")
public class User {
@SQLObj(name = "id",constraints = @Constraints(primaryKey = true))
private int id;
@SQLObj(name = "name")
private String name;
@SQLObj(name = "header")
private String header;
private int age;
private int sex;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getHeader() {
return header;
}
public void setHeader(String header) {
this.header = header;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public int getSex() {
return sex;
}
public void setSex(int sex) {
this.sex = sex;
}
}
插入数据
User user = new User();
user.setName("张三");
user.setAge(18);
dbHelper.insert(user);
批量插入
List<Member> members = new ArrayList<>();
for (int i = 1; i <= 10; i++) {
Member member1 = new Member();
member1.setAge(i);
member1.setName("M_" + i);
members.add(member1);
}
dbHelper.insertArray(members);
删除数据
User user_d = new User();
user_d.setId(2);
dbHelper.delete(user_d);
删除全部
dbHelper.deleteAll(Member.class);
修改数据
Member member = members.get(0);
member.setName("sb");
member.setAge(18);
dbHelper.modify(member);
查找（列表）
Member member1 = new Member();
member1.setId(1);
List<Member> members = dbHelper.findArray(member1);
查找（单条）
User user_t = new User();
user_t.setId(3);
User user2 = dbHelper.findOne(user_t);
条件查找（列表）
List<Member> members = new ArrayList<>();
members = dbHelper.findArray("select * from member", Member.class);
条件查找（单条）
Member member = dbHelper.findOne("select * from member", Member.class);