Hello Mark,
thanks for looking into that with me.
The problem is the Button Object which does not get instantiated correctly,
i guess this is what null is. i can let it crash now like this:
theButtonBtn = (Button) findViewById(R.id.ButtonTheButton);
Log.d("EditYourSettings","Before accessing ID");
Log.d("EditYourSettings",""+theButtonBtn .getId()); // it crashed here -
first access to the Button Object.
Is there anything I do wrong getting the Button?
How do you actually debug an android app with eclipse? Can you step through
the code and check if a variable is null? Like on a normal java app? When i
click on debug and set a breakpoint, it never stops. It just installs it on
the device.
Toby
On Sat, Aug 22, 2009 at 6:59 AM, Mark Murphy <[email protected]>wrote:
>
> Tobias Eisentraeger wrote:
> > Hello,
> >
> > I have trouble launching the WebBrowser with an Intent with a Button
> > Click. I try doing this in the onCreate Method of my Activity:
> >
> > final Button getTheButtonBtn = (Button)
> > this.findViewById(R.id.ButtonTheButton);
> > getTheButtonBtn.setOnClickListener(new View.OnClickListener() {
> > public void onClick(View view) {
> > // Browser oeffnen mit url
> > Intent i = new Intent(Intent.ACTION_VIEW ,
> > Uri.parse("http://www.url.com) );
> > startActivity(i);
> > }
> > });
> >
> > Its in the View like this:
> > <Button android:text="@string/button_ButtonTheButton_hint"
> > android:id="@+id/ButtonTheButton" android:layout_width="wrap_content"
> > android:layout_height="wrap_content"></Button>
> >
> > When i launch the Activity i get a force close with this in the log:
> >
> > 08-22 12:47:35.832: ERROR/AndroidRuntime(1826): Uncaught handler: thread
> > main exiting due to uncaught exception
> > 08-22 12:47:35.942: ERROR/AndroidRuntime(1826):
> > java.lang.RuntimeException: Unable to start activity
> >
> ComponentInfo{com.mycompany.APPName/com.mycompany.APPName.EditYourSettingActivity}:
> > java.lang.NullPointerException
>
> <snip>
>
> > 08-22 12:47:35.942: ERROR/AndroidRuntime(1826): Caused by:
> > java.lang.NullPointerException
> > 08-22 12:47:35.942: ERROR/AndroidRuntime(1826): at
> >
> com.mycompany.APPName.EditYourSettingActivity.onCreate(EditYourSettingActivity.java:43)
>
> Look at line 43 of EditYourSettingActivity -- it should be in onCreate()
> -- and figure out why you are trying to use a null pointer.
>
> --
> Mark Murphy (a Commons Guy)
> http://commonsware.com | http://twitter.com/commonsguy
>
> Android Development Wiki: http://wiki.andmob.org
>
> >
>
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