我正在创建一个表名为message的SQLite数据库。创建表后，我添加了一个名为MUD的列。
它给我一个像这样的错误
android.database.sqlite.SQLiteException: table message has no column named MUD (code 1)
：
INSERT INTO message(MUD,FROM_ID,TO_ID,TO1,MSG_TYPE,FROM1,MSG_DATE,MSG_BODY,STATUs) VALUES (?,?,?,?,?,?,?,?,?)
这是我的database.java类： -
public class Database extends SQLiteOpenHelper{
public Database(Context context) {
super(context, "School", null, 10677);
// TODO Auto-generated constructor stub
}
String r="CREATE TABLE login(sno INTEGER PRIMARY KEY, USER_ID VARCHAR, USERTYPE VARCHAR,MOBILE VARCHAR,SCHOOL VARCHAR,PASSWORD VARCHAR,DEVICE VARCHAR,NAME VARCHAR,DEVI VARCHAR)";
String s="Create TABLE message(MESSAGEID integer primary key autoincrement ,TO_ID VARCHAR,FROM_ID VARCHAR,MSG_BODY VARCHAR,MSG_TYPE VARCHAR,MSG_DATE VARCHAR,FROM1 VARCHAR,TO1 VARCHAR,STATUS VARCHAR,MUD VARCHAR)";
@Override
public void onCreate(SQLiteDatabase tm) {
tm.execSQL(r);
tm.execSQL(s);
}
@Override
public void onUpgrade(SQLiteDatabase tm, int OldVersion, int NewVersion) {
tm.execSQL("DROP TABLE IF EXISTS login" );
tm.execSQL("DROP TABLE IF EXISTS message" );
onCreate(tm);
}
public void store(String user_id,String user_type,String mobile,String school,String pass,String device,String name,String devi)
{
SQLiteDatabase tm = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("USERTYPE", user_type);
values.put("USER_ID", user_id);
values.put("MOBILE",mobile);
values.put("SCHOOL",school);
values.put("PASSWORD", pass);
values.put("DEVICE", device);
values.put("NAME",name);
values.put("DEVI",devi);
tm.insert("login", null, values);
tm.close(); // Closing database connection
}
public int getintval(String myq)
{
int Id=0;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(myq, null);
if (cursor.moveToFirst()) {
do {
Id = cursor.getInt(0);
} while (cursor.moveToNext());
}
return Id;
}
public void storeMessage(String to_id, String from_id,String msg_body,String msg_type,String msg_date,String from1,String to1,String status,String mud)
{
SQLiteDatabase tm = this.getWritableDatabase();
ContentValues values = new ContentValues();
// values.put("MESSAGEID",msgid);
values.put("TO_ID", to_id);
values.put("FROM_ID", from_id);
values.put("MSG_BODY",msg_body);
values.put("MSG_TYPE",msg_type);
values.put("MSG_DATE",msg_date);
values.put("FROM1",from1);
values.put("TO1",to1);
values.put("STATUs", status);
values.put("MUD",mud);
tm.insert("message", null, values);
tm.close();
}
public void storeMessageNew(String to_id, String from_id,String msg_body,String msg_type,String msg_date,String status)
{
SQLiteDatabase tm = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("TO_ID", to_id);
values.put("FROM_ID", from_id);
values.put("MSG_BODY",msg_body);
values.put("MSG_TYPE",msg_type);
values.put("MSG_DATE",msg_date);
values.put("STATUs", status);
tm.insert("message", null, values);
tm.close();
}
// Updating single contact
public void updateMessageBody(int msg_id, String msg_body){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("MSG_BODY", msg_body);
db.update("message", values, "MESSAGEID"+"="+msg_id, null);
}
public String [] check(String school)
{
SQLiteDatabase tm = this.getReadableDatabase();
Cursor cursor = tm.query("login", new String[] {"SCHOOL","DEVI"},"SCHOOL=?",new String[] { String.valueOf(school) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
return new String[]{cursor.getString(1)};
}
public String getSchool_id(String device_id){
String Id="";
// String Table_Name="login";
String selectQuery = "SELECT * FROM login where DEVI= '"+device_id+"'";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Id = cursor.getString(4);
} while (cursor.moveToNext());
}
return Id;
}
public String getAllData(String device_id){
String Id="";
// String Table_Name="login";
String selectQuery = "SELECT * FROM login where DEVICE= '"+device_id+"'";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Id = cursor.getString(0);
} while (cursor.moveToNext());
}
return Id;
}
public void deleteMsg(String msg_id)
{
Log.d("MessageID", msg_id);
String selectQuery = "Delete FROM message where MESSAGEID= '"+msg_id+"'";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
}
public List<FetchData> getAllContacts() {
Cursor cursor;
List<FetchData> contactList = new ArrayList<FetchData>();
// Select All Query
String selectQuery = "SELECT * FROM login ";
SQLiteDatabase db = this.getWritableDatabase();
cursor = db.rawQuery(selectQuery, null);
{
if (cursor.moveToFirst()) {
do {
FetchData fetchdata = new FetchData();
//contact.setID(Integer.parseInt(cursor.getString(0)));
fetchdata.setID(cursor.getInt(1));
fetchdata.setType(cursor.getString(2));
fetchdata.setMobile(cursor.getString(3));
fetchdata.setSchool_Id(cursor.getString(4));
fetchdata.setPassword(cursor.getString(5));
fetchdata.set_reg_id(cursor.getString(6));
fetchdata.set_name(cursor.getString(7));
contactList.add(fetchdata);
} while (cursor.moveToNext());
}
cursor.close();
}
return contactList;
}
public Cursor getData(String myq)
{ Cursor cursor;
SQLiteDatabase db = this.getWritableDatabase();
cursor = db.rawQuery(myq, null);
return cursor;
}
}
我正在使用它
db.storeMessage(to_id, from_id + "", message1, "text", localTime, "ST", "F", "R", roomId);
任何人都可以帮助我。
答案 0 :(得分：1)
每次更改架构时都应该增加数据库版本
public Database(Context context) {
super(context, "School", null, 10678);
// TODO Auto-generated constructor stub
}