HELP! strange problem when sent background midlet to foreground.

[jx4245]

hi all.
from the doucment . i got know the method Display.setCurrent( nonNullDIsplayable) can send a background midlet to foreground . but in my practice .it didn't work well . what happend like this :
there is one backgroud thread hold a tcp connection in my midlet .there is two type msg come in . one is Type A .and another is B.
when my midlet rcv the Type A msg, it excute <code>Display.setCurrent( Form a )</code> .and when the Type B msg come .the midlet will excute <code>Display.setCurrent( Form b )</code>.

the problem is :
when two type A msg come in .then double excute the <code>Display.setCurrent( Form a )</code> . the midlet will be sent to the forground .
But when type B msg come in the .<code>Display.setCurrent( Form b )</code> is excuted . the midlet always in the background ..not sent to the foreground .


and after i do some search on this topic . i got know the AMS will not invoke the Midlet . pauseApp() .except added a jad property like : nokia-back-event: pause . so i follow the doucument 's guard . add this property in the jad .and try to use the method <code> midlet.resumeRequest()</code> to take the backgound midlet to forground .

but what happed let me sad .it's true the AMS invoke the pauseApp() and also invoke the s midlet.startApp() after excute the <code> midlet.resumeRequest()</code> .but the midlet always stay in background . and then i switch the backgroud midlet to the foreground by manually . i found the AMS don't invock the midlet.startApp() when foreground the midlet

[rdrincon]

Hello,
I think some important information is missing.

1. Please let us know what phone model you are using
2. Please include some relevant code of the startapp and pauseapp to check

[jx4245]

Hello,
I think some important information is missing.

1. Please let us know what phone model you are using
2. Please include some relevant code of the startapp and pauseapp to check

-----------------------------------------------------
all i test it on the s60_3thd_FP2_sdk simulator .

the code like this :

int midletState = 0;
startapp()
{
if(MainForm == null)
{
MainForm = new MainForm ()
Display.setCurrent(MainForm);
}else
{
/* do nothing here . when the midlet go background .
when the Thread rcv msg .it will try to display another screen .

*/

}



midletState = STATE_START;
}


pauseapp()
{
/* i just record the midlet's state .
off course it will in itselt place
when jad property <Nokia-midlet-background : pause> added
*/
midletState = STATE_PAUSE;

}
}


there is background thread also

class thread
{

public void run()
{
msg = getMsgfromTcp();

if(msg == Type A)
{
Display.setCurrent(screen A);
}else if(msg == Type B)
{
Display.setCurrent(screen b);
}

}

}

[ingsaurabh]

try changing your startApp() with this one

startapp()
{
if(MainForm == null)
{
MainForm = new MainForm ()
Display.setCurrent(MainForm);
}else
{
/* do nothing here . when the midlet go background .
when the Thread rcv msg .it will try to display another screen .

*/
Display.setCurrent(null);
}



midletState = STATE_START;
} 

[jx4245]

try changing your startApp() with this one

startapp()
{
if(MainForm == null)
{
MainForm = new MainForm ()
Display.setCurrent(MainForm);
}else
{
/* do nothing here . when the midlet go background .
when the Thread rcv msg .it will try to display another screen .

*/
Display.setCurrent(null);
}



midletState = STATE_START;
} 

the result no change . can't pop up the screen autoly .but i got the something new that it can pop up the screen from background at first time run after installed to the emulater .

[jx4245]

OH .sorry ..MY midlet is base on the j2mepolish .so maybe it's the polish's problem .

[jx4245]

ok .problem is over .it's the polish' problem .thx all .