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我有一個用於我的android應用程序的sqlite表。它有4個字段，Id，Name，ParseId，Mobile。在這裏，Id是一個int，每增加一個新用戶都會增加。然而，ParseId是一個字符串。在Sqlite中查詢Android
我想通過傳遞ParseId來查詢我的分貝。我想獲取我提供給查詢的ParseId用戶的Mobile和Name字段。
public class DatabaseHandlerLocal extends SQLiteOpenHelper {
// All Static variables
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "parseUsers";
// Contacts table name
private static final String TABLE_PARSE = "parse_users";
// Contacts Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_MOBILE = "mobile";
private static final String KEY_PARSE_USERID = "parseUserId";
private static final String KEY_PARSE_USERNAME = "parseUserName";
public DatabaseHandlerLocal(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_PARSE_TABLE = "CREATE TABLE " + TABLE_PARSE + "("+
KEY_ID + " INTEGER PRIMARY KEY," + KEY_MOBILE + " TEXT," + KEY_PARSE_USERID + " TEXT,"
+ KEY_PARSE_USERNAME + " TEXT" + ")";
db.execSQL(CREATE_PARSE_TABLE);
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_PARSE);
// Create tables again
onCreate(db);
}
/**
* All CRUD(Create, Read, Update, Delete) Operations
*/
// Adding new contact
public void addParseUser(Users users) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_ID, users.getId());
values.put(KEY_PARSE_USERID, users.getParseUserObjId());
values.put(KEY_PARSE_USERNAME, users.getParseUserName());
values.put(KEY_MOBILE, users.getMobile());
// Inserting Row
db.insert(TABLE_PARSE, null, values);
db.close(); // Closing database connection
}
// Getting single contact
public Users getUser(String id) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_PARSE, new String[] { KEY_ID,
KEY_PARSE_USERNAME, KEY_PARSE_USERID,KEY_MOBILE }, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
Users user = new Users(cursor.getString(0),
cursor.getString(1), cursor.getString(2),cursor.getString(3));
// return contact
return user;
}
// Getting All Contacts
public List<Users> getAllUsers() {
List<Users> userList = new ArrayList<Users>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_PARSE;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Users user = new Users();
user.setId(cursor.getString(0));
user.setParseUserName(cursor.getString(1));
user.setParseUserObjId(cursor.getString(2));
user.setMobile(cursor.getString(3));
// Adding contact to list
userList.add(user);
} while (cursor.moveToNext());
}
// return contact list
return userList;
}
// Updating single contact
public int updateUser(Users user) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_PARSE_USERID, user.getParseUserObjId());
values.put(KEY_PARSE_USERNAME, user.getParseUserName());
values.put(KEY_MOBILE, user.getMobile());
// updating row
return db.update(TABLE_PARSE, values, KEY_ID + " = ?",
new String[] { user.getId() });
}
// Deleting single contact
public void deleteContact(Users user) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_PARSE, KEY_ID + " = ?",
new String[]{String.valueOf(user.getId())});
db.close();
}
// Getting contacts Count
public int getUserCount() {
String countQuery = "SELECT * FROM " + TABLE_PARSE;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();
}
public boolean hasObject(String id) {
SQLiteDatabase db = getWritableDatabase();
String selectString = "SELECT * FROM " + TABLE_PARSE
+ " WHERE " + KEY_PARSE_USERID + " =? ";
Cursor cursor = db.rawQuery(selectString, new String[] {id}); //add the String your searching by here
boolean hasObject = false;
if(cursor.moveToFirst()){
hasObject = true;
//if you had multiple records to check for, use next 6 lines.
int count = 0;
while(cursor.moveToNext()){
count++;
}
//here, count is records found
Log.d("dbdbdbdbdbdbdb", String.format("%d records found", count));
}
cursor.close(); // Don't forget to close your cursor
db.close(); //AND your Database!
return hasObject;
}
public String getName(String id){
SQLiteDatabase db = getWritableDatabase();
String selectString = "SELECT * FROM " + TABLE_PARSE
+ " WHERE " + KEY_PARSE_USERID + " =? ";
Cursor cursor = db.rawQuery(selectString, new String[] {id});
String name = cursor.getString(cursor.getColumnIndexOrThrow(KEY_PARSE_USERNAME));
cursor.close(); // Don't forget to close your cursor
db.close();
return name;
}
/*public Cursor getNameValues(int index) {
SQLiteDatabase db = getWritableDatabase();
String from[] = { KEY_PARSE_USERNAME, KEY_MOBILE };
String where = + "=" + index;
Cursor cursor = db.query(true, WordsDB.TermTable, from, where, null, null, null, null, null);
return cursor;
}
public Cursor getTermValues(int index) {
String from[] = { "Term", "Type" };
String where = WordsDB.ID + "=?";
String[] whereArgs = new String[]{index+""};
Cursor cursor = db.query(WordsDB.TermTable, from, where, whereArgs, null, null, null, null);
return cursor;
}*/
}
我試過getName（）方法上面，也有一些方法，這些方法註釋，但沒有解決。我的表格正在獲取我提供的數據，這些數據是我在日誌中監控的。
u能說明如何？我是Sqlite的新手。或者在教程的方向指向我。 – asdec90
@ asdec90只需使用你的方法，並添加行，我發佈在答案中，就在你嘗試獲取字符串的行之前。 – Drobs
@ asdec90這是一個很好的[教程]（http://www.vogella.com/tutorials/AndroidSQLite/article.html） – Drobs