Android SQLite数据库相关操作
1、创建数据库、表
publicclass SQLiteStorage extends SQLiteOpenHelper {
privatestaticfinal String name = "purchase_case";
privatestaticfinalintversion = 1;
public SQLiteStorage(Context context) {
super(context, name, null, version);
}
@Override
publicvoid onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE IF NOT EXISTS BABY_COLLECT("
+ "_id integerprimary key autoincrement,"
+ "baby_id varchar(30)," + "baby_descvarchar(100),"
+ "baby_namevarchar(30))");
}
@Override
publicvoid onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
this.onCreate(db);
}
}
2、实现数据表的基本操作方法
/**
*
* Class Name:
* <p>
* OrderService
* </p>
*
* Description:
* <p>
* 商品列表数据库操作类
* </p>
*
*/
publicclass BabyService {
private SQLiteStorage storageHandler;
public BabyService(Context context) {
this.storageHandler = new SQLiteStorage(context);
}
/***
* @Description本地数据库用户新增操作
*
* @param content
*/
publicvoid save(Content content) {
SQLiteDatabase database = storageHandler.getWritableDatabase();
database.beginTransaction();
try {
ContentValues contentvalues = new ContentValues();
contentvalues.put("baby_id", content.getId());
contentvalues.put("baby_desc", content.getDesc());
contentvalues.put("baby_name", content.getTitle());
database.insert("BABY_COLLECT", null, contentvalues);
database.setTransactionSuccessful();
} finally {
database.endTransaction();
database.close();
}
}
/***
* @Description本地数据库用户更改操作
*
* @param content
*/
publicvoid update(Content content) {
SQLiteDatabase database = storageHandler.getWritableDatabase();
database.beginTransaction();
try {
ContentValues contentvalues = new ContentValues();
contentvalues.put("baby_id", content.getId());
contentvalues.put("baby_desc", content.getDesc());
contentvalues.put("baby_name", content.getTitle());
database.update("BABY_COLLECT", contentvalues, "baby_id=?",
new String[] { String.valueOf(content.getId()) });
database.setTransactionSuccessful();
} finally {
database.endTransaction();
database.close();
}
}
/***
* @Description根据Id查询方法
*
* @param id
*
* @return content
*/
public Content findContentById(String id) {
Content content = null;
SQLiteDatabase database = storageHandler.getReadableDatabase();
Cursor cursor = null;
cursor = database.query("BABY_COLLECT", new String[] { "baby_id",
"baby_desc", "baby_name" }, "baby_id=?", new String[] { id },
null, null, null);
if (cursor.getCount() > 0) {
content = new Content();
while (cursor.moveToNext()) {
content.setTitle(cursor.getString(2));
content.setDesc(cursor.getString(1));
content.setId(Long.parseLong(cursor.getString(0)));
}
}
cursor.close();
database.close();
return content;
}
/***
* 本地数据库用户信息删除操作
*
* @param content
*
*/
publicvoid deleteContent(Content content) {
SQLiteDatabase database = storageHandler.getWritableDatabase();
database.delete("BABY_COLLECT", "baby_id=?",
new String[] { String.valueOf(content.getId()) });
database.close();
}
}
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