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>
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