Hi all,

Here I got a Sub-activity ,in which there are two buttons,one is OK button,the other is Cancel button.
In the Subactivity Class, the Cancel button implemented as follows

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cancel.setOnClickListener(new OnClickListener() {
         public void onClick(View arg0) {
            // Close this Activity
            MySubActivity.this.setResult(RESULT_CANCELED);
            MySubActivity.this.finish();
         }
      });

So when Cancel button been clicked, we got a RuntimeException:
Failure delivering result ResultInfo{who=null, request=1440, result=0, data=null, extras=null} to Original Activity: java.lang.NullPointerException

As far as I know, it seems that the cancel button didnt send back some arguments, which showed in ResultInfo, like who,result, data,extras. But Since the Cancel Button been CLICKed, why should send back the arguments?? OK, if follow the rules of API, what are needed and how to do this??

I got confused! Hope someone can HELP!!
Thanks!

Hello cyberrob,

you only called setResult(...) the others (except requestcode) are null, because you did not call them.

The funny thing is why the Exception occurs.
Did you try running it after a -wipe-data

Regards,
plusminus

My Run argument now is

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-sdcard d:sdcard.img -wipe-data

IT didnt change anything, and I also try just -wipe-data, result the same.

The key point is ,you said I only called setResult(), what else functions should I CALL??
Maybe in this page: android.app.Activity
Could u please point them out?
Thx
BTW which exception let u feel funny? Runtime or Null?

plusminus wrote:Hello cyberrob,

you only called setResult(...) the others (except requestcode) are null, because you did not call them.

The funny thing is why the Exception occurs.
Did you try running it after a -wipe-data

Regards,
plusminus

Hello cyberrob,

its funny, because I'm doing exactly the same and it works fine.




Regards,
plusminus