我的 NAMES 表中有 3 个名字，Allakhazam、Beatbox 和 Cunning。
public Cursor fetchNamesByConstraint(String filter) {
mDb.query(true, DATABASE_NAMES_TABLE, new String[] { KEY_ROWID,
KEY_NAME }, KEY_NAME + " LIKE ?",
new String[] { filter }, null, null, null,
null);
return mCursor;
}
我使用“A”作为过滤器调用该函数，但我的光标返回 0 计数，而它应该至少返回 1。任何人都可以看到代码有什么问题？
【问题讨论】：
标签： android
此语句将返回所有keyname 等于string 指定的字符串的记录，如果使用通配符，则可以得到想要的结果。喜欢：
mDb.query(true, DATABASE_NAMES_TABLE, new String[] { KEY_ROWID,
KEY_NAME }, KEY_NAME + " LIKE ?",
new String[] { filter+"%" }, null, null, null,
null);
将列出过滤器中以单词开头的所有记录。
mDb.query(true, DATABASE_NAMES_TABLE, new String[] { KEY_ROWID,
KEY_NAME }, KEY_NAME + " LIKE ?",
new String[] {"%"+ filter+ "%" }, null, null, null,
null);
将列出过滤器中包含单词的所有记录。
【讨论】：
public java.util.Vector<Products> getsearch(String subcategory,String searchby)
{
SQLiteDatabase db=this.getReadableDatabase();
Cursor cursor = db.query(
TABLE_PRODUCTS,
new String[] { SUBCATEGORY, MAIN_CATEGORY, PRODUCT_ID, PRODUCT_NAME, BRAND, PACKAGE_SIZE, PRICE },
SUBCATEGORY + " LIKE '%" + subcategory + "%'",
null, null, null, null, null);
}
【讨论】：
你能试试这个.....代码.......
public static final String KEY_ROWID="row";
public static final String KEY_NAME="name";
public Cursor fetchNamesByConstraint(String filter) {
Cursor cursor=mDb.query(true, DATABASE_NAMES_TABLE, null,"row LIKE '%"+filter+"%' or name LIKE '%"+filter+"%'",null, null, null, null);
}
【讨论】：
你应该给过滤器加上通配符;)
"A%"
【讨论】：
您可以使用原始查询。
public Cursor fetchNamesByConstraint(String filter) {
String query = "SELECT * FROM " + TABLE_NAME + " WHERE " +
COLUMN_NAME + " LIKE '%" + filter + "%'" ;
SQLiteDatabase db = this.getReadableDatabase();
cursor = db.rawQuery(query, null);
return mCursor;
}
【讨论】：
public Cursor fetchNamesByConstraint(String filter) {
mDb.query(true, DATABASE_NAMES_TABLE, new String[] { KEY_ROWID,
KEY_NAME }, KEY_NAME + " LIKE ?",
new String[] {"%"+ filter +"%"}, null, null, null,
null);
return mCursor;
}
【讨论】：
剩下的看我们的设计，光标基本相同
public ArrayList<AboneDataList> getAllPasssiveAboneByDate(String mDate) {
ArrayList<AboneDataList> foodList = new ArrayList<>();
AboneDataList food;
SQLiteDatabase database = dbHelper.getReadableDatabase();
final String kolonlar[] = {DBHelper.COLUMN_A_ID,
DBHelper.COLUMN_A_ABONE_NO,
DBHelper.COLUMN_A_NAME,
DBHelper.COLUMN_A_IS_STUFF,
DBHelper.COLUMN_A_COUNTRY,
DBHelper.COLUMN_A_CITY,
DBHelper.COLUMN_A_TOWN,
DBHelper.COLUMN_A_ADDRESS,
DBHelper.COLUMN_A_PHONE,
DBHelper.COLUMN_A_MOBILE,
DBHelper.COLUMN_A_DATE_START,
DBHelper.COLUMN_A_DATE_END,
DBHelper.COLUMN_A_COUNT,
DBHelper.COLUMN_A_IS_ACTIVE,
DBHelper.COLUMN_A_CARGO,
DBHelper.COLUMN_A_YURT_ID,
DBHelper.COLUMN_A_JOURNAL,
DBHelper.COLUMN_A_MAIL,
DBHelper.COLUMN_A_BUSINESS,
DBHelper.COLUMN_A_BIRTH,
DBHelper.COLUMN_A_GENDER,
DBHelper.COLUMN_A_ABONE_TYPE,
DBHelper.COLUMN_A_MEDENI_TYPE};
//String whereClause = DBHelper.COLUMN_A_JOURNAL + " = ? AND " + DBHelper.COLUMN_A_IS_ACTIVE + " = ? ";
//final String whereArgs[] = {String.valueOf(mJournal),isActive};
//Cursor cursor = database.query(DBHelper.TABLE_ABONE, kolonlar, whereClause, whereArgs,
// null, null, DBHelper.COLUMN_A_ID + " ASC");
Cursor cursor = database.rawQuery("select * from " + DBHelper.TABLE_ABONE + " WHERE "
+ DBHelper.COLUMN_A_DATE_END + " LIKE '%" + mDate + "%'", null);
//Cursor cursor = database.query(DBHelper.TABLE_ABONE, kolonlar, null, null, null, null, DBHelper.COLUMN_A_NAME + " ASC");
while (cursor.moveToNext()) {
food = new AboneDataList();
food.setId(cursor.getInt(cursor.getColumnIndex(DBHelper.COLUMN_A_ID)));
food.setAbone_no(cursor.getInt(cursor.getColumnIndex(DBHelper.COLUMN_A_ABONE_NO)));
food.setName(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_NAME)));
food.setIs_stuff(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_IS_STUFF)));
food.setCountry(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_COUNTRY)));
food.setCity(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_CITY)));
food.setTown(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_TOWN)));
food.setAddress(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_ADDRESS)));
food.setPhone(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_PHONE)));
food.setMobile(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_MOBILE)));
food.setDate_start(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_DATE_START)));
food.setDate_end(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_DATE_END)));
food.setCount(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_COUNT)));
food.setIs_active(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_IS_ACTIVE)));
food.setCargo(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_CARGO)));
food.setYurt_id(cursor.getInt(cursor.getColumnIndex(DBHelper.COLUMN_A_YURT_ID)));
food.setJournal(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_JOURNAL)));
food.setMail(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_MAIL)));
food.setBusiness(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_BUSINESS)));
food.setBirth(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_BIRTH)));
food.setGender(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_GENDER)));
food.setAbone_type(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_ABONE_TYPE)));
food.setMedeni_hal(cursor.getString(cursor.getColumnIndex(DBHelper.COLUMN_A_MEDENI_TYPE)));
foodList.add(food);
}
database.close();
cursor.close();
return foodList;
}
【讨论】：