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我被困在我的代码上，一直在关注 Youtube 上的 newboston 教程。下面是我的代码，但由于某种原因，我遇到了错误，我无法弄清楚，有什么提示吗？

这是我的 RedemptionDB.java 类，在这段代码中就行

public RedemptionDB(Context c){
Context = c;
}

我收到一个错误，告诉我设置方法返回类型为 void，但在代码中，Bucky 没有那样做。

我得到的下一个错误是：

public RedmptionDB open(){

它告诉我：Creat Class RedemptionDB，它是我在代码开头想到的创建的！

package com.aloadofbs.redemptioncardmanager;

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class RedemptionDB {


private static final String DB_NAME = "RedempDB";
private static final int DB_VERSION = 1;
private static final String TABLE = "cards";

public static final String KEY_ID = "_id"; // Special for id
public static final String KEY_CARDNUMBER = "card_number";
public static final String KEY_CARDNAME = "card_name";
public static final String KEY_BRIGCOLOR = "brig_color";
public static final String KEY_CARDPT = "power_toughness";
public static final String KEY_QTY = "qty";
public static final String KEY_VALUE = "value";
public static final String KEY_C = "C";
public static final String KEY_TYPE = "card_type";
public static final String KEY_SET = "card_set";
public static final String KEY_RARITY = "card_rarity";
public static final String KEY_VERSE = "card_verse";
public static final String KEY_IDENTIFIER = "card_identifiers";
public static final String KEY_ABILITIES = "card_special_ability";

private static DbHelper ourHelper;
private static Context ourContext;
private static SQLiteDatabase ourDatabase;

private static class DbHelper extends SQLiteOpenHelper{

public DbHelper(Context context) {
        super(context, DB_NAME, null, DB_VERSION);
        // TODO Auto-generated constructor stub
    }



@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL("CREATE TABLE" + TABLE + " ("+ KEY_ID + "INTEGER PRIMARY KEY ATOINCREMENT, " + KEY_CARDNUMBER + "TEXT NOT NULL, " + KEY_CARDNAME + "TEXT NOT NULL, " + KEY_BRIGCOLOR + "TEXT NOT NULL, " + KEY_CARDPT + "TEXT, " + KEY_QTY + "INTEGER, " + KEY_VALUE + "INTEGER, " + KEY_C + "TEXT, " + KEY_TYPE + "TEXT, " + KEY_SET + "TEXT, " + KEY_RARITY + "TEXT, " + KEY_VERSE + "TEXT NOT NULL, " + KEY_IDENTIFIER + "TEXT NOT NULL, " + KEY_ABILITIES + " TEXT NOT NULL);"
            );  

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS " + TABLE);
    onCreate(db);

}

public RedemptionDB (Context c){
Context = c;
}

public RedmptionDB open(){
    ourHelper = new DbHelper(ourContext);
    ourDatabase = ourHelper.getWritableDatabase();
    return this;

}

public void close(){
    ourHelper.close();
    ourDatabase.close();

}
}

public long createEntry(String cardname, String cardset,
        String cardcolor, String cardtype) {
    // TODO Auto-generated method stub
    ContentValues cv = new ContentValues();
    cv.put(KEY_CARDNAME, cardname);
    cv.put(KEY_BRIGCOLOR, cardcolor);
    cv.put(KEY_TYPE, cardtype);
    cv.put(KEY_SET, cardset);
    return ourDatabase.insert(TABLE, null, cv);

}

}
4

1 回答 1

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一些更改应该可以解决您的问题：

改变这个：

public RedemptionDB(Context c){  
    Context = c;  
}

为此（您指定ourContext，而不是Context）：

public RedemptionDB(Context c){  
    this.ourContext = c;  
}

改变这个：

public DbHelper(Context context) { 
    super(context, DB_NAME, null, DB_VERSION); 
    // TODO Auto-generated constructor stub 
}

为此（您真的不希望它成为公共方法）：

DbHelper(Context context) { 
    super(context, DB_NAME, null, DB_VERSION); 
    // TODO Auto-generated constructor stub 
}
于 2012-06-01T03:56:33.933 回答