06-25 07:37:52.745: ERROR/AndroidRuntime(1722): Uncaught handler:
thread main exiting due to uncaught exception
06-25 07:37:52.774: ERROR/AndroidRuntime(1722):
java.lang.RuntimeException: Unable to start activity ComponentInfo
{goodteamstudio.rdc/goodteamstudio.rdc.MainMenu}:
java.lang.NullPointerException
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2268)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2284)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.app.ActivityThread.access$1800(ActivityThread.java:112)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.os.Handler.dispatchMessage(Handler.java:99)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.os.Looper.loop(Looper.java:123)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.app.ActivityThread.main(ActivityThread.java:3948)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
java.lang.reflect.Method.invokeNative(Native Method)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
java.lang.reflect.Method.invoke(Method.java:521)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:782)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
dalvik.system.NativeStart.main(Native Method)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): Caused by:
java.lang.NullPointerException
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
goodteamstudio.rdc.MainMenu.onCreate(MainMenu.java:314)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
1123)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2231)
06-25 07:37:52.774: ERROR/AndroidRuntime(1722): ... 11 more
===============================
XML
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android";
xmlns:app="http://schemas.android.com/apk/res/goodteamstudio.rdc";
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<goodteamstudio.game.CMainRun
android:id="@+id/mainmenu_id"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
=========================
public class CMainRun extends View
{
public CMainRun(Context contexts,AttributeSet attrs) {
super(contexts);
context = contexts;
……
}
=======================
setContentView(R.layout.main);
gamerun = (CMainRun)findViewById(R.id.mainmenu_id);
==========================
gamerun = null ????????????
why??
On May 18, 6:52 pm, steve_macleod <steven_macl...@hotmail.com> wrote:
> Hi Dianne - yup knocking up a wee pacman game to learn android....
> what gave it away? :)
>
> I was using standard drawables until I hit the issue of animating the
> drawables. Thats when I started looking at ImageViews.
> It was my understanding that I had to use an ImageView to achieve
> frame-by-frame animation. Can it be done without ImageViews? Are there
> any examples that I could look over?
>
> Thanks again
>
> On 18 May, 07:11, Dianne Hackborn <hack...@android.com> wrote:
>
>
>
> > Like I said in your other thread, you probably don't want to be doing this.
> > If I am to assume from your code-snippet that you have some kind of PacMan
> > game, where the game is implemented in a SurfaceView and the PacMan is an
> > ImageView... seriously, you don't want to do this.
>
> > The purpose of SurfaceView is to give you a dedicated drawing surface, which
> > you can render to directly, independently of the normal update mechanism of
> > the view hierarchy. Using an ImageView to render things completely defeats
> > that purpose. If you are writing a game, you should be drawing your
> > graphics into the SurfaceView yourself and not using the view hierarchy of
> > managing the element there.
>
> > On Sun, May 17, 2009 at 5:16 PM, steve_macleod
> > <steven_macl...@hotmail.com>wrote:
>
> > > So if I had:
>
> > > <FrameLayout xmlns:android="http://schemas.android.com/apk/res/
> > > android"
> > > android:layout_width="fill_parent"
> > > android:layout_height="fill_parent">
>
> > > <android.pacman.com.PacManMainView
> > > android:id="@+id/pacman_main_view"
> > > android:layout_width="fill_parent"
> > > android:layout_height="fill_parent">
> > > </android.pacman.com.PacManMainView>
>
> > > <ImageView android:id="@+id/pacAnim"
> > > android:src="@drawable/pac02"
> > > android:layout_width="20px"
> > > android:layout_height="20px"/>
> > > </FrameLayout>
>
> > > How would I go about getting a reference to the ImageView from
> > > PamManMainView?
>
> > > Thanks again
>
> > > On 18 May, 00:56, Marco Nelissen <marc...@android.com> wrote:
> > > > If this is indeed the case, then the ImageView isn't actually there,
> > > > so you can't get a reference to it.
>
> > > > On Sun, May 17, 2009 at 4:45 PM, steve_macleod
>
> > > > <steven_macl...@hotmail.com> wrote:
>
> > > > > Thanks for the reply.
> > > > > Ill look into this. What is the best way to get a reference to the
> > > > > ImageView from the custom view code, if this is the case?
>
> > > > > On 18 May, 00:19, Marco Nelissen <marc...@android.com> wrote:
> > > > >> I'm not 100% sure, but I don't think a SurfaceView can have child
> > > > >> views (since it's not a ViewGroup).
>
> > > > >> On Sun, May 17, 2009 at 2:53 PM, steve_macleod
>
> > > > >> <steven_macl...@hotmail.com> wrote:
>
> > > > >> > Hi,
> > > > >> > I have the following xml layout:
>
> > > > >> > <android.pacman.com.PacManMainView
> > > > >> > android:id="@+id/pacman_main_view"
> > > > >> > android:layout_width="fill_parent"
> > > > >> > android:layout_height="fill_parent">
>
> > > > >> > <ImageView android:id="@+id/pacAnim"
> > > > >> > android:src="@drawable/pac02"
> > > > >> > android:layout_width="20px"
> > > > >> > android:layout_height="20px"/>
>
> > > > >> > </android.pacman.com.PacManMainView>
>
> > > > >> > PacManMainView extends SurfaceView. I can draw to this, it works
> > > > >> > OK.
> > > > >> > However, when I attempt to get a reference to the ImageView from
> > > > >> > PacManMainView like this:
>
> > > > >> > @Override
> > > > >> > public void surfaceCreated(SurfaceHolder holder) {
> > > > >> > /* test reference to imageview
> > > > >> > ImageView pacImageV = (ImageView)findViewById(R.id.pacAnim);
> > > > >> > }
>
> > > > >> > I get a null each time. Is there something real simple Im missing?
>
> > > > >> > Thanks- Hide quoted text -
>
> > > > >> - Show quoted text -- Hide quoted text -
>
> > > > - Show quoted text -
>
> > --
> > Dianne Hackborn
> > Android framework engineer
> > hack...@android.com
>
> > Note: please don't send private questions to me, as I don't have time to
> > provide private support, and so won't reply to such e-mails. All such
> > questions should be posted on public forums, where I and others can see and
> > answer them.- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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