Where exactly does the NullPointerException occur? If you aren't sure you
can find this by looking for a "caused by" line in the logcat information
after your app crashes.
----------------------------------------------------------------------
There are only 10 types of people in the world...
Those who know binary and those who don't.
----------------------------------------------------------------------
On Mon, Aug 2, 2010 at 3:56 PM, Victoria <victoriasarabu...@gmail.com>wrote:
> Hi there,
>
> I am trying to set up a ViewFlipper that changes a SlidingDrawers
> content each time a button is pressed. So far every view I set up
> worked fine, but now I am trying to create a ListView (including
> single_choice_mode) within a child view of the ViewFlipper, but my
> attempt only let to a NullPointerException. As I only discovered
> ViewFlipper today, I am not yet familiar with it and may not have
> understood it completely...if someone could give me a hand and help me
> find out what I have done wrong, that would be great.
>
> Thank you in advance.
>
> Here is what I have done:
>
> The code for the onClick event of the ImageButtons:
>
> public void onClick(View v){
> if (v == btnExposure){
>
> mFlipper.setDisplayedChild(0);
>
> }
> else if (v == btnProperties){
> mFlipper.setDisplayedChild(1);
> }
>
> else if (v == btnSpecialEffects){
> mFlipper.setDisplayedChild(2);
> String[] specialEffects =
> getResources().getStringArray(R.array.special_effects_array);
> lv.setAdapter(new ArrayAdapter<String>(this,
> R.layout.specialeffectsview, specialEffects));
> lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
> }
>
> }
> The XML code of the ViewFlipper within my main xml file:
>
> <ViewFlipper
> android:layout_width="wrap_content"
> android:layout_height="wrap_content"
> android:id="@+id/flipper"
> android:layout_toRightOf="@id/button_exposure">
> <include android:id="@+id/view_exposure" layout="@layout/
> exposureview" />
> <include android:id="@+id/view_properties" layout="@layout/
> propertiesview" />
> <include android:id="@+id/view_special_effects" layout="@layout/
> specialeffectsview"/>
> </ViewFlipper>
> The string array within my strings.xml:
>
> <string-array name="special_effects_array">
> <item>None</item>
> <item>Greyscale</item>
> <item>Sepia</item>
> <item>Negative</item>
> <item>Solarize</item>
> <item>Polarize</item>
> </string-array>
>
> And finally the specialeffectsview.xml (the layout file for the
> ListView):
>
> <?xml version="1.0" encoding="utf-8"?>
> <LinearLayout android:id="@+id/view_special_effects_list"
> android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> xmlns:android="http://schemas.android.com/apk/res/android";>
> <ListView android:id="@+id/special_effects_list"
> android:layout_height="wrap_content"
> android:layout_width="fill_parent"></ListView>
> </LinearLayout>
>
> --
> You received this message because you are subscribed to the Google
> Groups "Android Beginners" group.
>
> ATTENTION: Android-Beginners will be permanently disabled on August 9 2010.
> For more information about this change, please read [http://goo.gl/xkfl]
> or visit the Group home page.
>
> Try asking and tagging your question on Stack Overflow at
> http://stackoverflow.com/questions/tagged/android
>
> To unsubscribe from this group, send email to
> android-beginners+unsubscr...@googlegroups.com<android-beginners%2bunsubscr...@googlegroups.com>
> For more options, visit this group at
> http://groups.google.com/group/android-beginners?hl=en
>
--
You received this message because you are subscribed to the Google
Groups "Android Beginners" group.
ATTENTION: Android-Beginners will be permanently disabled on August 9 2010. For
more information about this change, please read [http://goo.gl/xkfl] or visit
the Group home page.
Try asking and tagging your question on Stack Overflow at
http://stackoverflow.com/questions/tagged/android
To unsubscribe from this group, send email to
android-beginners+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-beginners?hl=en
