我认为我Cursor
不太了解我几乎可以肯定我的代码可能是错误的,所以我将链接我的整个代码
package com.tanukiproductions.battleforchristmas;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class SQLiteTable {
public static final String KEY_ROWID = "_id";
public static final String KEY_LEVEL = "level";
public static final String KEY_HEALTH = "health";
public static final String KEY_NAME = "name";
public static final String KEY_CRIT = "crit";
public static final String KEY_CRIT_RANGE = "crit_range";
public static final String KEY_CRIT_INC = "crit_increment";
public static final String KEY_HIT_RANGE = "hit_range";
public static final String KEY_HIT_INC = "hit_increment";
public static final String KEY_CHAR_IMG = "character_image";
public static final String KEY_TOTAL_XP = "total_xp";
public static final String KEY_XP = "xp";
public static final String KEY_XP_NEEDED = "xp_needed";
public static final String KEY_COINS = "coins";
public static final String KEY_SMALL_POTS = "small_pots";
public static final String KEY_LARGE_POTS = "large_pots";
private static DbHelper ourHelper;
private final Context ourContext;
private static SQLiteDatabase ourDatabase;
private static final String DB_NAME = "battle_for_christams";
private static final String DB_TBL = "stats";
private static final int DATABASE_VERSION = 1;
private static class DbHelper extends SQLiteOpenHelper{
public DbHelper(Context context) {
super(context, DB_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE " + DB_TBL + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_LEVEL + " INTEGER NOT NULL, " +
KEY_HEALTH + " INTEGER NOT NULL, " +
KEY_NAME + " TEXT NOT NULL, " +
KEY_CRIT + " INTEGER NOT NULL, " +
KEY_CRIT_RANGE + " INTEGER NOT NULL, " +
KEY_CRIT_INC + " INTEGER NOT NULL, " +
KEY_HIT_RANGE + " INTEGER NOT NULL, " +
KEY_HIT_INC + " INTEGER NOT NULL, " +
KEY_CHAR_IMG + " INTEGER NOT NULL, " +
KEY_TOTAL_XP + " INTEGER NOT NULL, " +
KEY_XP + " INTEGER NOT NULL, " +
KEY_XP_NEEDED + " INTEGER NOT NULL, " +
KEY_COINS + " INTEGER NOT NULL, " +
KEY_SMALL_POTS + " INTEGER NOT NULL, " +
KEY_LARGE_POTS + " INTEGER NOT NULL)"
);
ContentValues values = new ContentValues();
values.put(KEY_NAME, "User1");
values.put( KEY_LEVEL, 1);
values.put(KEY_HEALTH, 10);
values.put(KEY_CRIT, 5);
values.put(KEY_CRIT_RANGE, 2);
values.put(KEY_CRIT_INC, 2);
values.put(KEY_HIT_RANGE, 2);
values.put(KEY_HIT_INC, 0);
values.put(KEY_TOTAL_XP, 0);
values.put(KEY_XP, 0);
values.put(KEY_XP_NEEDED, 5);
values.put(KEY_COINS, 5);
values.put(KEY_SMALL_POTS, 0);
values.put(KEY_LARGE_POTS, 0);
values.put(KEY_CHAR_IMG, 1);
db.insert(DB_TBL, null, values);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXIST " + DB_TBL);
onCreate(db);
}
}
public SQLiteTable(Context c){
ourContext = c;
ourHelper = new DbHelper(ourContext);
}
public static void open() throws SQLException{
ourDatabase = ourHelper.getWritableDatabase();
}
public static void close() throws SQLException{
ourHelper.close();
}
public int getLevel() {
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_LEVEL}, null, null, null, null, null);
int level = cursor.getInt(0);
cursor.close();
close();
return level;
}
public int getHealth() {
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_HEALTH}, null, null, null, null, null);
int health = cursor.getInt(0);
cursor.close();
close();
return health;
}
public int getCrit() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_CRIT}, null, null, null, null, null);
int crit = cursor.getInt(0);
cursor.close();
close();
return crit;
}
public int getCritRange() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_CRIT_RANGE}, null, null, null, null, null);
int critRange = cursor.getInt(0);
cursor.close();
close();
return critRange;
}
public int getCritInc() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_CRIT_INC}, null, null, null, null, null);
int critInc = cursor.getInt(0);
cursor.close();
close();
return critInc;
}
public int getHitInc() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_HIT_INC}, null, null, null, null, null);
int hitInc = cursor.getInt(0);
cursor.close();
close();
return hitInc;
}
public int getHitRange() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_HIT_RANGE}, null, null, null, null, null);
int hitRange = cursor.getInt(0);
cursor.close();
close();
return hitRange;
}
public int getXp() {
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_XP}, null, null, null, null, null);
int xp = cursor.getInt(0);
cursor.close();
close();
return xp;
}
public void setXp(int xp){
open();
ContentValues values = new ContentValues();
int xpNeeded = getXpNeeded();
int XP = getXp() + xp;
int totalXp = getTotalXp() + xp;
if ( XP >= xpNeeded ){
XP = XP - xpNeeded;
levelUp();
}
values.put(KEY_XP, XP);
values.put(KEY_TOTAL_XP, totalXp);
ourDatabase.update(DB_TBL, values, null, null);
close();
}
public int getXpNeeded() {
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_XP_NEEDED}, null, null, null, null, null);
int xpNeeded = cursor.getInt(0);
cursor.close();
close();
return xpNeeded;
}
public int getTotalXp() {
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_TOTAL_XP}, null, null, null, null, null);
int totalXp = cursor.getInt(0);
cursor.close();
close();
return totalXp;
}
public int getCoins() {
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_COINS}, null, null, null, null, null);
int coins = cursor.getInt(0);
cursor.close();
close();
return coins;
}
public String getName() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_NAME}, null, null, null, null, null);
String name = cursor.getString(0);
cursor.close();
close();
return name;
}
public void levelUp() {
// TODO Auto-generated method stub
ContentValues values = new ContentValues();
int level = getLevel() + 1;
int health = getHealth() + 5;
double crit = getCrit() + 0.1;
int xpNeeded = getXpNeeded() + 5;
int critInc = getCritInc() + 1;
int hitInc;
int hitRange;
int critRange;
values.put(KEY_LEVEL, level);
values.put(KEY_HEALTH, health);
values.put(KEY_CRIT, crit);
values.put(KEY_XP_NEEDED, xpNeeded);
values.put(KEY_CRIT_INC, critInc);
if(level % 2 == 0){
hitInc = getHitInc() + 1;
values.put(KEY_HIT_INC, hitInc);
}
if(level % 4 == 0){
hitRange = getHitRange() + 1;
critRange = getCritRange() + 1;
values.put(KEY_HIT_RANGE, hitRange);
values.put(KEY_CRIT_RANGE, critRange);
}
ourDatabase.update(DB_TBL, values, null, null );
}
private int getLargePots() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_LARGE_POTS}, null, null, null, null, null);
int largePots = cursor.getInt(0);
cursor.close();
close();
return largePots;
}
private int getSmallPots() {
// TODO Auto-generated method stub
open();
Cursor cursor = ourDatabase.query(DB_TBL, new String[] {KEY_SMALL_POTS}, null, null, null, null, null);
int smallPots = cursor.getInt(0);
cursor.close();
close();
return smallPots;
}
public void updateSmallPots() {
// TODO Auto-generated method stub
ContentValues values = new ContentValues();
open();
int smallPots = getSmallPots() + 1;
int coins = getCoins() - 1;
values.put(KEY_SMALL_POTS, smallPots);
values.put(KEY_COINS, coins);
ourDatabase.update(DB_TBL, values, null, null);
close();
}
public void updateLargePots(){
ContentValues values = new ContentValues();
open();
int largePots = getLargePots() + 1;
int coins = getCoins() - 2;
values.put(KEY_LARGE_POTS, largePots);
values.put(KEY_COINS, coins);
ourDatabase.update(DB_TBL, values, null, null);
close();
}
}
这是我的日志猫
01-04 16:12:25.596: E/AndroidRuntime(29517): android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1
01-04 16:12:25.596: E/AndroidRuntime(29517): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
01-04 16:12:25.596: E/AndroidRuntime(29517): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)