I tried to close the record store.
But it also saves the record during the game is running, and the record will lost after I close the application.

Thanks for your reply

Thanks for your reply
And the memory profiler, there are 5 columns, which one that I should concern?
Thanks a lot!

I called closeRecordStore() already:
public class GameScreen extends Canvas {
..............
rs = RMSUtil.openRSAnyway(dbname);
.........
public void paint() {
................
rs = RMSUtil.openRSExisted(dbname);
if (rs==null)
{
g.setColor(255, 255, 255);
g.drawString("Your Score "+String.valueOf(spriteScore), 0, 20, Graphics.TOP|Graphics.LEFT);
}
else {
try {
if (spriteScore>=RMSUtil.readInt4RS(rs, r1)) {
r1 = spriteScore;
r1 = RMSUtil.writeInt2RS(rs, spriteScore);
g.setColor(255, 255, 255);
g.drawString("Highest Score" +String.valueOf(RMSUtil.readInt4RS(rs, r1)), 0, 40, Graphics.TOP|Graphics.LEFT);
rs.closeRecordStore();
}
else
{
g.setColor(255, 255, 255);
g.drawString("Highest Score " +String.valueOf(RMSUtil.readInt4RS(rs, r1)), 0, 40, Graphics.TOP|Graphics.LEFT);
rs.closeRecordStore();
}
} catch (Exception e) {}
}
.............
}
.............
..........
}

But it doesnt work, did I have another thing go wrong?
Thanks for your reply

After I installed an application to my phone, and the application contains a RMS. When I run this application, it can save my highest score.
However, after I closed my application, all data (record) will be lost.
Does it is possible to make a permanent database in the application?
Thanks a lot!
My RMS to open a database is:
public static RecordStore openRSAnyway (String rsname)
{

RecordStore rs = null;

if(rsname.length()>32)
return null;
try {
rs = RecordStore.openRecordStore(rsname, true);
return rs;
} catch (Exception e)
{
return null;
}
}

public static RecordStore openRSExisted(String rsname)
{
RecordStore rs = null;
if (rsname.length()>32)
return null;
try {
rs = RecordStore.openRecordStore(rsname, false);
return rs;
} catch (Exception e)
{
return null;
}
}

public static int writeInt2RS(RecordStore rs, int data)
{
byte []tmp = new byte[4];
tmp[0] = (byte)(0xff&(data>>24));
tmp[1] = (byte)(0xff&(data>>16));
tmp[2] = (byte)(0xff&(data>>);
tmp[3] = (byte)(0xff&(data>>0));
try
{
return rs.addRecord(tmp, 0, tmp.length);
} catch(Exception e)
{
}
return -1;
}

I discover that when I changed the Splash image to a text (i.e: g.drawString("GameABC", 0, 0, Graphics.TOP|Graphics.LEFT); )
then the problem will not occur.
But when I use an image to replace the text in the title Page, the problem will occur again.
P.S: The splash image only 1.2KB.
Can anyone help me?
Thank you very much!

The error message occurs every time after the title splash page changes to GameScreen, no matter the title page automatically changes to GameScreen or I click the start command manually.

Oh, sorry.
1) The error message is " ! Unable to run application"
    The message is displayed after I choose "start" in    the Splash image.
   
2) I use Nokia PC Suite to install my application
3) JAD file contains 3 classes, they are:
   a) GameMIDlet
   b) GameScreen (i.e. Canvas)
   c) RMSUtil (i.e recordstorage)
For the RMS, I create a database called "gamedb" which places in the constructor of GameScreen. And then it will compares the scores with the scores in the database every time. If the score is higher than the database, it will replace database's record.
   d) 11KB of png in res
4) I use Sun's KToolbar and Nokia S40 SDK to develop my application.

Thanks a lot~~

Hello everybody,
I use simulator to develop my game, but after install the program to my phone (Nokia 3120 and the file size of the game is 24KB), and the real phone tell me cannot be excuted.
So, could you tell me which factors can lead to this problem?  
Thank you very much~

Hello everybody,
If I want to produce the game that the enemy will attack the player randomly by calling the random integer (randInt) and when the enemy attack the player it will play an animation, that means:
eg)
if (randInt == 0) {
// enemy plays defense animation
}
if (randInt == 1) {
//enemy plays attack animation
}

And in the paint method, I use clipping for the animation.
In the while loop (i.e game loop), when the Thread sleep 100ms, the clipping will change one frame (i.e:repaint), the animation will be fully played until the 6th frame is displayed. However, the problem is after 100 ms, the random and animation will begin at the same time, that means when the attack animation is playing, it will suddenly change to defense animation in the middle of the attack animation and vice versa.
So, can anyone can teach me where the random method should be placed so that it can fix this problem?  
Thanks for your reply~~

The problem is solved after I opened a new Project and copied all the files from the old Project to the new Project.

My programs consumes 16KB, and my picture only consumes 6 KB, why it will be 76 KB after packaged?

But the original jar file consumed 63 KB already  

My phone contains 447KB spaces, but my jar only consumes about 75 KB, but I don't know why the Application Installer tells me "This application cannot be installed to the phone. The file is too big"??  

Thanks for your reply~
If I use DKU-5 cable by using Nokia PC Suite, do I need to use "Install Application" for installing the game to the mobile phone?

Thank you very much~
I just installed the software, but I forgot to buy the DKU-5 Cable
But it is an easy job, I will buy it tomorrow.  

Nokia: N-Gage,  3120, 7610
Thank you very much~

After developed the game, how to insert the game to my phone for real testing?
Thank you!

I see~ Thanks for David!!

Thanks for Mr ribot.
I tried to apply:
int n = ufoMissiles.length;
for(int i=0;i<n;i++) {
 ufoMissilies.doDraw(g);
 Thread.sleep(1000);
}
but it leads to the screen (all elements) hold a second and then run again.
Sorry, I may not provide very detailed information.
In my program, there is a paint method:
public void paint (Graphics g) {
// doing any drawing
..........................
for(int i=0; i < ufoMissiles.length; i++) {
ufoMissiles.doDraw(g);
}
}
And then my class implements Runnable method,
public void run() {
.............
.............

if(ufoMissileCount < ufoMissiles.length &&ufos.isDropBomb()) {
for(int j=0; j < ufoMissiles.length; j++) {
if(! ufoMissiles[j].isAlive()) {
ufoMissiles[j].setX(0);
ufoMissiles[j].setY(ufos.getY() + ufos.getHeight());
ufoMissiles[j].setAlive(true);
ufoMissileCount++;
break;
}
}
}

........}
So, when the condition is achieved, it will draw the ufoMissile, but the ufoMissiles are too closed when they are displayed, so I want to separate them so that they can be displayed one by one.
Thank you.

for(int i=0; i < ufoMissiles.length; i++) {
ufoMissiles.doDraw(g);
}

For above code, if I want to draw ufoMissiles[1] after 1 second of drawing ufoMissiles[0], which things that I should do?
Thanks for your reply!

Thanks for all your helps  !!!~

Could any one can tell me where can I find mobile 3D's source code or tutorial on the Internet?
Thanks a lot

I see
Thanks a lot~

It works now, thank you very much~
You are very helpful~
However, can you tell me what is the function of
super(true) and super(false)?
Why super(false) can work but not super(true)?
Thanks a lot~

Thanks a lot, but it also doesn't work.
I am using MIDP2.0 GameCanvas.
I use Sun.com's KToolbar for testing.
I apply this method:
public void keyReleased(int keycode)
{
// switch cases
}

Hello everybody,
I have a problem about the button (e.g KEY_NUM1, KEY_NUM2 .... etc), Why the buttons are disable (i.e. no action after pressing it) except KEY_STAR and KEY_POUND?
All are disable such as KEY_NUM1, KEY_NUM2 ..... KEY_NUM9.
My program like below:

switch(keycode){
case KEY_STAR:
System.out.println("CDE");
break;
}
switch(keycode)
{
case KEY_POUND:
System.out.println("ABC");
break;
}


Thank you very much~

How can I set a ID for each clipping?
eg)  ?? =g.drawRect(x, y, a, b)
Thank you very much!

Oh, thanks!
One more question, if I want to rotate, transform a clip, which method I should use?

Can Clipping can be rotated?
Thank you very much~~

How can I parse Sprite to Layer?
Thanks a lot~