Android本地数据存储

SharedPreferences

SharedPreferences preferences;
SharedPreferences.Editor editor;
preferences = getPreferences(Activity.MODE_PRIVATE);
editor = preferences.edit();
//写入数据
editor.putString("name","Ricky");
editor.commit();
//读取数据
preferences.getString("name","No")

public class Db extends SQLiteOpenHelper {

public Db(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, "db", factory, 1);
}

@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE user (" +
"name TEXT DEFAULT \"\"," +
"sex TEXT DEFAULT \"\")");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}
}

Db db = new Db(this,"user",null,1);
SQLiteDatabase dbWrite = db.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put("name","Ricky");
cv.put("sex", "Male");
dbWrite.insert("user", null, cv);
cv = new ContentValues();
cv.put("name","Hady");
cv.put("sex", "Female");
dbWrite.insert("user", null, cv);
dbWrite.close();

SQLiteDatabase dbRead = db.getReadableDatabase();
Cursor c = dbRead.query("user", null, null, null, null, null, null);
while (c.moveToNext()) {
String name = c.getString(c.getColumnIndex("name"));
String sex = c.getString(c.getColumnIndex("sex"));
System.out.print(String.format("name=%s,sex=%s",name,sex));
}