The Logcat says that there is a 08-02 22:33:45.704:
ERROR/AndroidRuntime(6918): java.lang.NullPointerException
08-02 22:33:45.704:
ERROR/AndroidRuntime(6918): at
com.mobilevideoeditor.moved.EditorView.onClick(EditorView.java:82), which
is lv.setAdapter(new ArrayAdapter<String>(this,
R.layout.specialeffectsview, specialEffects)); but this would mean that
R.layout.specialeffectsview doesn't exist, or? And it definitely does (below
is the code I use for the specialeffectsview.xml)
<?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>
This is the entire logcat output:
08-02 22:33:45.694: ERROR/AndroidRuntime(6918): Uncaught handler: thread
main exiting due to uncaught exception
08-02 22:33:45.704: ERROR/AndroidRuntime(6918):
java.lang.NullPointerException
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
com.mobilevideoeditor.moved.EditorView.onClick(EditorView.java:82)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.View.performClick(View.java:2364)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.View.onTouchEvent(View.java:4179)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.View.dispatchTouchEvent(View.java:3709)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1695)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1116)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.app.Activity.dispatchTouchEvent(Activity.java:2068)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1679)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.view.ViewRoot.handleMessage(ViewRoot.java:1724)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.os.Handler.dispatchMessage(Handler.java:99)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.os.Looper.loop(Looper.java:123)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
android.app.ActivityThread.main(ActivityThread.java:4603)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
java.lang.reflect.Method.invokeNative(Native Method)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
java.lang.reflect.Method.invoke(Method.java:521)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
08-02 22:33:45.704: ERROR/AndroidRuntime(6918): at
dalvik.system.NativeStart.main(Native Method)
On Mon, Aug 2, 2010 at 9:30 PM, Mark Murphy <[email protected]> wrote:
> If your error report is accurate, you are not setting lv to a value,
> and so it is null.
>
> On Mon, Aug 2, 2010 at 4:25 PM, kivy <[email protected]> wrote:
> > Hi
> >
> > I am trying to populate a ViewFlipper with a ListView when a certain
> > button is clicked...but I only get a NullPointerException for
> > lv.setAdapter(new ArrayAdapter<String>(this,
> > R.layout.specialeffectsview, specialEffects));
> >
> > To be honest I don't really know how to do this, I just learned about
> > the ViewFlipper today and I haven't fully understood how to use it
> > yet. If anyone could help me find how what I have done wrong, that
> > would be great.
> >
> > Thanks in advance.
> >
> > Here is the code I use:
> >
> > 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);
> > }
> >
> > }
> >
> > --
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> > Groups "Android Developers" group.
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> >
>
>
>
> --
> Mark Murphy (a Commons Guy)
> http://commonsware.com | http://github.com/commonsguy
> http://commonsware.com/blog | http://twitter.com/commonsguy
>
> _Android Programming Tutorials_ Version 2.9 Available!
>
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