lostinai的专栏

public class SharedPreferencesTest extends Activity { SharedPreferences preferences; SharedPreferences.Editor editor; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate

1.SQLite介绍： （1）SQLite支持 NULL、INTEGER、REAL（浮点数字）、TEXT(字符串文本)和BLOB(二进制对象)数据类型，虽然它支持的类型只有五种，但实际上sqlite3也接受varchar(n)、char(n)、decimal(p,s)等数据类型，只不过在运算或保存时会转成对应的五种数据类型。 （2）SQLite最大的特点是你可以把各种类型的数据保存到任何字

public class FileTest extends Activity { final String FILE_NAME = "lostinai.bin"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVie

public class DBTest extends Activity { SQLiteDatabase db; Button bn = null; ListView listView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

创建数据库 public class MyDatabaseHelper extends SQLiteOpenHelper { final String CREATE_TABLE_SQL = "create table dict(_id integer primary key autoincrement , word , detail)"; /** * @param context

创建数据库 public class DBHelper extends SQLiteOpenHelper { private static final String DB_NAME = "coll.db"; private static final String TBL_NAME = "CollTbl"; private static final String CREATE_TBL = "