降序SQLite Integer而不是字符串

Question

我已經設法讓我的SQLite數據庫以降序出現在評分列中，但事情是我認爲它是將列識別爲字符串而不是int，因爲它出現了順序如下：

7，6，4，2，1，19，

，我不知道如何去改變它，即使我敢肯定它的東西很簡單。這裏是我當前的代碼：

public class CodeBreakerDB { 

public static final String KEY_ROWID = "_id"; //Referencing a specific row in the database. 
public static final String KEY_NAME = "player_name"; 
public static final String KEY_SCORE = "player_score"; 

private static final String DATABASE_NAME = "PlayerScoresdb"; //Labeling the database 
private static final String DATABASE_TABLE = "playerTable"; //Labeling the table 

private static final int DATABASE_VERSION = 1; 

private DbHelper scoreHelper; 
private final Context scoreContext; 
private SQLiteDatabase scoreDb; 

//databaseHelper to help set up database 
private static class DbHelper extends SQLiteOpenHelper { 

    public DbHelper(Context context) { 
     super(context, DATABASE_NAME , null, DATABASE_VERSION); 

    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { //Method only called on first use to generate db. 

     db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" + 
       KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + 
       KEY_NAME + " TEXT NOT NULL, " + 
       KEY_SCORE + " INTEGER);"); 


    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { //Method called after first use 

     db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); 
     onCreate(db); 
    } 

} 

public CodeBreakerDB(Context c){ 
    scoreContext = c; 
} 

public CodeBreakerDB open() throws SQLException{ 
    scoreHelper = new DbHelper(scoreContext); //Gets aspects set up for the database including name and version. 
    scoreDb = scoreHelper.getWritableDatabase(); //Opening of database through scoreHelper. 
    return this; 
} 

public void close(){ 
    scoreHelper.close(); //Closes the scoreHelper class. 
} 

public long createScoreEntry(String name, String score) { // Writing to the actual database. 

    ContentValues cv = new ContentValues(); 
    cv.put(KEY_NAME, name); 
    cv.put(KEY_SCORE, score); 
    return scoreDb.insert(DATABASE_TABLE, null, cv); 

} 

public String getRank() { 

    String[] rank = new String[]{ KEY_ROWID }; 
    Cursor c = scoreDb.query(DATABASE_TABLE, rank, null, null, null, null, KEY_SCORE+" DESC"); 
    String rankResult = ""; 

    int iRow2 = c.getColumnIndex(KEY_ROWID); //Cursor looking for column setting equal to these ints. 



    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { 
     //Move to first row - where cursor starts and moves to next row as long it is not after last row. 
     rankResult = rankResult + c.getString(iRow2) + "\n"; 
     //Returning value of row that it is currently on. 
    } 
    return rankResult; //returning result 
} 


public String getName() { 

    String[] name = new String[]{ KEY_NAME }; 
    Cursor c = scoreDb.query(DATABASE_TABLE, name, null, null, null, null, KEY_SCORE+" DESC"); //reading information from db. 
    String nameResult = ""; 

    int iRow1 = c.getColumnIndex(KEY_NAME); //Cursor looking for column setting equal to these ints. 


    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { 
     //Move to first row - where cursor starts and moves to next row as long it is not after last row. 
     nameResult = nameResult + c.getString(iRow1) + "\n"; 
     //Returning value of row that it is currently on. 
    } 
    return nameResult; //returning result 
} 

public String getScore() { 

    String[] score = new String[]{ KEY_SCORE }; 
    Cursor c = scoreDb.query(DATABASE_TABLE, score, null, null, null, null, KEY_SCORE+" DESC"); 
    String scoreResult = ""; 

    int iRow2 = c.getColumnIndex(KEY_SCORE); //Cursor looking for column setting equal to these ints. 



    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { 
     //Move to first row - where cursor starts and moves to next row as long it is not after last row. 
     scoreResult = scoreResult + c.getString(iRow2) + "\n"; 
     //Returning value of row that it is currently on. 
    } 
    return scoreResult; //returning result 
} 
} 

Answer 1

public long createScoreEntry(String name, String score) { // Writing to the actual database. 

    ContentValues cv = new ContentValues(); 
    cv.put(KEY_NAME, name); 
    cv.put(KEY_SCORE, score); 
    return scoreDb.insert(DATABASE_TABLE, null, cv); 

} 

你把KEY_SCORE爲字符串。注意score類型是String。

或許你應該使用這個

cv.put(KEY_SCORE, Integer.parseint(score)); 

編輯：

也改變你在哪裏提取值的代碼。即

rankResult = rankResult + c.getString(iRow2) + "\n"; 

到

rankResult = rankResult + Integer.toString(c.getInt(iRow2)) + "\n"; 

也放下你的表，並再次重新創建它。