我一直在努力解决这个问题一段时间，并认为我可能会寻求更有经验的程序员的帮助。基本上我用一行数据创建了一个SQLite数据库。我创建了一个用于测试目的的按钮，它将提取行值，编辑它们（在此测试中只有一列），然后使用新值更新数据库。单击按钮时出现错误。
这是单击按钮时调用的内容...
private void levelUpClick(){
DBHelper dbHandler = new DBHelper(this, null, null, 1);
String id = "1";
int exp;
CharStats charstats =
dbHandler.findCharStats(id);
exp = Integer.valueOf(charstats.getCharExperience());
exp += 500;
dbHandler.updateCharStats(Integer.valueOf(charstats.getID()), String.valueOf(charstats.getCharName()), String.valueOf(charstats.getCharClass()), Integer.valueOf(charstats.getCha`enter code here`rLevel()), Integer.valueOf(charstats.getCharHitPoints()), exp);
charExperience.setText("" + exp);
}
这是我创建的DBAdapter类，不幸的是，最好将所有内容粘贴到这里......
package com.bred.rpg;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
public class DBHelper extends SQLiteOpenHelper{
public static final String COLUMN_ID = "id";
public static final String COLUMN_CHAR_NAME = "charname";
public static final String COLUMN_CHAR_CLASS = "charclass";
public static final String COLUMN_CHAR_LEVEL = "charlevel";
public static final String COLUMN_CHAR_HITPOINTS = "charhitpoints";
public static final String COLUMN_CHAR_EXPERIENCE = "charexperience";
private static final String DATABASE_NAME = "RPG.db";
private static final String DATABASE_TABLE = "CharStats";
private static final int DATABASE_VERSION = 1;
public DBHelper(Context context, String name,
CursorFactory factory, int version) {
super(context, DATABASE_NAME, factory, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
String CREATE_CHAR_STATS_TABLE = "CREATE TABLE " +
DATABASE_TABLE + "("
+ COLUMN_ID + " INTEGER PRIMARY KEY," + COLUMN_CHAR_NAME
+ " TEXT unique, " + COLUMN_CHAR_CLASS + " TEXT," + COLUMN_CHAR_LEVEL +
" INTEGER, " + COLUMN_CHAR_HITPOINTS + " INTEGER," + COLUMN_CHAR_EXPERIENCE +
" INTEGER " + ")";
db.execSQL(CREATE_CHAR_STATS_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(db);
}
public void addCharacter(CharStats charstats) {
ContentValues values = new ContentValues();
values.put(COLUMN_CHAR_NAME, charstats.getCharName());
values.put(COLUMN_CHAR_CLASS, charstats.getCharClass());
values.put(COLUMN_CHAR_LEVEL, charstats.getCharLevel());
values.put(COLUMN_CHAR_HITPOINTS, charstats.getCharHitPoints());
values.put(COLUMN_CHAR_EXPERIENCE, charstats.getCharExperience());
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.query(DATABASE_TABLE, null, null, null, null, null, null);
if(cursor.moveToFirst()) {
String rowId = cursor.getString(cursor.getColumnIndex(COLUMN_ID));
db.delete(DATABASE_TABLE, COLUMN_ID + "=?", new String[]{rowId});
}
db.insert(DATABASE_TABLE, null, values);
db.close();
}
public CharStats findCharStats(String id) {
String query = "Select * FROM " + DATABASE_TABLE + " WHERE " + COLUMN_ID + " = \"" + id + "\"";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(query, null);
CharStats charstats = new CharStats();
if (cursor.moveToFirst()) {
cursor.moveToFirst();
charstats.setID(Integer.parseInt(cursor.getString(0)));
charstats.setCharName(cursor.getString(1));
charstats.setCharClass(cursor.getString(2));
charstats.setCharLevel(Integer.parseInt(cursor.getString(3)));
charstats.setCharHitPoints(Integer.parseInt(cursor.getString(4)));
charstats.setCharExperience(Integer.parseInt(cursor.getString(5)));
cursor.close();
} else {
charstats = null;
}
db.close();
return charstats;
}
public void updateCharStats(int id, String charName, String charClass, int charLevel, int charHitPoints, int charExperience) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValue = new ContentValues();
contentValue.put("COLUMN_ID", id);
contentValue.put("COLUMN_CHAR_NAME", charName);
contentValue.put("COLUMN_CHAR_CLASS", charClass);
contentValue.put("COLUMN_CHAR_LEVEL", charLevel);
contentValue.put("COLUMN_CHAR_HITPOINTS", charHitPoints);
contentValue.put("COLUMN_CHAR_EXPERIENCE", charExperience);
db.update(DATABASE_TABLE, contentValue, "id =" + id, null);
db.close();
}
}
然后当然是logcat：
01-28 22:57:42.008: I/Database(25962): sqlite returned: error code = 1, msg = no such column: COLUMN_CHAR_CLASS
01-28 22:57:42.008: E/Database(25962): Error updating COLUMN_CHAR_CLASS=Warrior COLUMN_CHAR_NAME=Dlgoth COLUMN_CHAR_EXPERIENCE=500 COLUMN_CHAR_HITPOINTS=15 COLUMN_CHAR_LEVEL=1 COLUMN_ID=1 using UPDATE CharStats SET COLUMN_CHAR_CLASS=?, COLUMN_CHAR_NAME=?, COLUMN_CHAR_EXPERIENCE=?, COLUMN_CHAR_HITPOINTS=?, COLUMN_CHAR_LEVEL=?, COLUMN_ID=? WHERE id =1
01-28 22:57:42.008: D/AndroidRuntime(25962): Shutting down VM
01-28 22:57:42.008: W/dalvikvm(25962): threadid=1: thread exiting with uncaught exception (group=0x40015560)
01-28 22:57:42.028: E/AndroidRuntime(25962): FATAL EXCEPTION: main
01-28 22:57:42.028: E/AndroidRuntime(25962): android.database.sqlite.SQLiteException: no such column: COLUMN_CHAR_CLASS: , while compiling: UPDATE CharStats SET COLUMN_CHAR_CLASS=?, COLUMN_CHAR_NAME=?, COLUMN_CHAR_EXPERIENCE=?, COLUMN_CHAR_HITPOINTS=?, COLUMN_CHAR_LEVEL=?, COLUMN_ID=? WHERE id =1
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:92)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:65)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:83)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:41)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1149)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteDatabase.updateWithOnConflict(SQLiteDatabase.java:1706)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.database.sqlite.SQLiteDatabase.update(SQLiteDatabase.java:1656)
01-28 22:57:42.028: E/AndroidRuntime(25962): at com.bred.rpg.DBHelper.updateCharStats(DBHelper.java:109)
01-28 22:57:42.028: E/AndroidRuntime(25962): at com.bred.rpg.Character.levelUpClick(Character.java:88)
01-28 22:57:42.028: E/AndroidRuntime(25962): at com.bred.rpg.Character.onClick(Character.java:67)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.view.View.performClick(View.java:2485)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.view.View$PerformClick.run(View.java:9080)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.os.Handler.handleCallback(Handler.java:587)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.os.Handler.dispatchMessage(Handler.java:92)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.os.Looper.loop(Looper.java:123)
01-28 22:57:42.028: E/AndroidRuntime(25962): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-28 22:57:42.028: E/AndroidRuntime(25962): at java.lang.reflect.Method.invokeNative(Native Method)
01-28 22:57:42.028: E/AndroidRuntime(25962): at java.lang.reflect.Method.invoke(Method.java:507)
01-28 22:57:42.028: E/AndroidRuntime(25962): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-28 22:57:42.028: E/AndroidRuntime(25962): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-28 22:57:42.028: E/AndroidRuntime(25962): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：2)
您正在使用
ContentValues contentValue = new ContentValues();
contentValue.put("COLUMN_ID", id);
contentValue.put("COLUMN_CHAR_NAME", charName);
contentValue.put("COLUMN_CHAR_CLASS", charClass);
contentValue.put("COLUMN_CHAR_LEVEL", charLevel);
contentValue.put("COLUMN_CHAR_HITPOINTS", charHitPoints);
contentValue.put("COLUMN_CHAR_EXPERIENCE", charExperience);
使用上面的意思是搜索名为COLUMN_ID，COLUMN_CHAR_NAME等的列，它们应该是id，charname等。只需从上面的代码中删除" "，Android就会正确识别您的列。
使用以下代码。
ContentValues contentValue = new ContentValues();
contentValue.put(COLUMN_ID, id);
contentValue.put(COLUMN_CHAR_NAME, charName);
contentValue.put(COLUMN_CHAR_CLASS, charClass);
contentValue.put(COLUMN_CHAR_LEVEL, charLevel);
contentValue.put(COLUMN_CHAR_HITPOINTS, charHitPoints);
contentValue.put(COLUMN_CHAR_EXPERIENCE, charExperience);
答案 1 :(得分：2)
问题在于：
public void updateCharStats(int id, String charName, String charClass, int charLevel, int charHitPoints, int charExperience) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValue = new ContentValues();
contentValue.put("COLUMN_ID", id);
contentValue.put("COLUMN_CHAR_NAME", charName);
contentValue.put("COLUMN_CHAR_CLASS", charClass);
contentValue.put("COLUMN_CHAR_LEVEL", charLevel);
contentValue.put("COLUMN_CHAR_HITPOINTS", charHitPoints);
contentValue.put("COLUMN_CHAR_EXPERIENCE", charExperience);
db.update(DATABASE_TABLE, contentValue, "id =" + id, null);
db.close();
}
删除所有列中的引号，此错误应该消失。错误日志指出了这个问题，因为它正在尝试编译以下内容：
> no such column: COLUMN_CHAR_CLASS: , while compiling: UPDATE CharStats
> SET COLUMN_CHAR_CLASS=?, COLUMN_CHAR_NAME=?, COLUMN_CHAR_EXPERIENCE=?,
> COLUMN_CHAR_HITPOINTS=?, COLUMN_CHAR_LEVEL=?, COLUMN_ID=? WHERE id =1