Thanks, I fixed that still have the same error though, here's my new
code.
package com.drawing;
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;
import android.util.Log;
public class NotesDbAdapter {
public static final String KEY_ROWID = "_id";
public static final String KEY_X = "x";
public static final String KEY_Y = "y";
public static final String KEY_Size = "size";
private static final String TAG = "NotesDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_NAME = "data";
private static final String DATABASE_TABLE = "notes";
private static final int DATABASE_VERSION = 2;
private static final String DATABASE_CREATE =
" create table " +DATABASE_TABLE+ " ("
+KEY_ROWID+ " integer primary key autoincrement, "
+KEY_X+ " integer, "
+KEY_Y+ " integer, "
+KEY_Size+ " integer);";
private final Context mCtx;
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
try {
db.execSQL(DATABASE_CREATE);
} catch (Exception e) {
Log.e("dbAdapter", e.getMessage().toString());
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int
newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion
+ " to "
+ newVersion + ", which will destroy all old
data");
db.execSQL("DROP TABLE IF EXISTS notes");
onCreate(db);
}
}
public NotesDbAdapter(Context ctx) {
this.mCtx = ctx;
}
public NotesDbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
mDbHelper.close();
}
public long createNote(float f, float g, int size) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_X, f);
initialValues.put(KEY_Y, g);
initialValues.put(KEY_Size, size);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
public boolean deleteNote(long rowId) {
return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId,
null) > 0;
}
public Cursor fetchAllNotes() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID,
KEY_X,KEY_Y,KEY_Size}, null, null, null, null, null);
}
public Cursor fetchNote(long rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
KEY_X,KEY_Y,KEY_Size}, KEY_ROWID + "=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public boolean updateNote(long rowId, int x, int y, int size) {
ContentValues args = new ContentValues();
args.put(KEY_X, x);
args.put(KEY_Y, y);
args.put(KEY_Size, size);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" +
rowId, null) > 0;
}
}
On Dec 28, 2:57 pm, Kostya Vasilyev <[email protected]> wrote:
> Are all these supposed to be mapped to the same column, "_id", or is this a
> copy / paste artifact?
>
> public static final String KEY_ROWID = "_id";
> public static final String KEY_X = "_id";
> public static final String KEY_Y = "_id";
> public static final String KEY_Size = "_id";
>
> 29 декабря 2011 г. 1:50 пользователь Jeresam515
> <[email protected]>написал:
>
>
>
>
>
>
>
> > I did the notepad tutorials, and am using a modified version of that
> > for my database. I don't understand why my program isn't correctly
> > writing to it. Help would be greatly appreciated.
>
> > package com.drawing;
>
> > 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;
> > import android.util.Log;
>
> > public class NotesDbAdapter {
>
> > public static final String KEY_ROWID = "_id";
> > public static final String KEY_X = "_id";
> > public static final String KEY_Y = "_id";
> > public static final String KEY_Size = "_id";
> > private static final String TAG = "NotesDbAdapter";
> > private DatabaseHelper mDbHelper;
> > private SQLiteDatabase mDb;
> > private static final String DATABASE_CREATE =
> > "create table notes (_id integer primary key autoincrement, "
> > + "title text not null, body text not null);";
>
> > private static final String DATABASE_NAME = "data";
> > private static final String DATABASE_TABLE = "notes";
> > private static final int DATABASE_VERSION = 2;
>
> > private final Context mCtx;
>
> > private static class DatabaseHelper extends SQLiteOpenHelper {
>
> > DatabaseHelper(Context context) {
> > super(context, DATABASE_NAME, null, DATABASE_VERSION);
> > }
>
> > @Override
> > public void onCreate(SQLiteDatabase db) {
>
> > db.execSQL(DATABASE_CREATE);
> > }
>
> > @Override
> > public void onUpgrade(SQLiteDatabase db, int oldVersion, int
> > newVersion) {
> > Log.w(TAG, "Upgrading database from version " + oldVersion
> > + " to "
> > + newVersion + ", which will destroy all old
> > data");
> > db.execSQL("DROP TABLE IF EXISTS notes");
> > onCreate(db);
> > }
> > }
>
> > public NotesDbAdapter(Context ctx) {
> > this.mCtx = ctx;
> > }
>
> > public NotesDbAdapter open() throws SQLException {
> > mDbHelper = new DatabaseHelper(mCtx);
> > mDb = mDbHelper.getWritableDatabase();
> > return this;
> > }
>
> > public void close() {
> > mDbHelper.close();
> > }
>
> > public long createNote(float f, float g, int size) {
> > ContentValues initialValues = new ContentValues();
> > initialValues.put(KEY_X, f);
> > initialValues.put(KEY_Y, g);
> > initialValues.put(KEY_Size, size);
> > return mDb.insert(DATABASE_TABLE, null, initialValues);
> > }
>
> > public boolean deleteNote(long rowId) {
>
> > return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId,
> > null) > 0;
> > }
>
> > public Cursor fetchAllNotes() {
>
> > return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID,
> > KEY_X,KEY_Y,KEY_Size}, null, null, null, null, null);
> > }
>
> > public Cursor fetchNote(long rowId) throws SQLException {
>
> > Cursor mCursor =
>
> > mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
> > KEY_X,KEY_Y,KEY_Size}, KEY_ROWID + "=" + rowId, null,
> > null, null, null, null);
> > if (mCursor != null) {
> > mCursor.moveToFirst();
> > }
> > return mCursor;
>
> > }
>
> > public boolean updateNote(long rowId, int x, int y, int size) {
> > ContentValues args = new ContentValues();
> > args.put(KEY_X, x);
> > args.put(KEY_Y, y);
> > args.put(KEY_Size, size);
> > return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" +
> > rowId, null) > 0;
> > }
> > }
>
> > --
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