If you are using additional libraries (with uses-library) be aware that there is a bug in 1.5 where an app using a widget can have its process launched without those libraries being loaded.
On Mon, May 18, 2009 at 10:13 PM, JP <[email protected]> wrote: > > I am working my way through oh my first widget (so this is 1.5, > obviously) and I'm stuck. I've poked around a problem involving the > launch of an Activity when clicking on a widget. Scenario: User drags > widget on home screen without prior launch of the Activity in > question. I am following this post: > > http://android-developers.blogspot.com/2009/04/introducing-home-screen-widgets-and.html > Instead of launching the browser through ACTION_VIEW, I am trying to > launch an Activity by class. I've toyed around with different Intent > settings, but no luck. > > The following snipped shows the launch log > <------------------ Sanitized log launching Activity > ----------------------> > 05-19 04:28:56.173: INFO/ActivityManager(571): Starting activity: > Intent { action=android.intent.action.MAIN categories= > {android.intent.category.LAUNCHER} flags=0x10200000 comp= > {com.mycompany.myapp/com.mycompany.myapp.MainClass} } > <------------------ Sanitized log ----------------------> > This is identical to a regular launch from the home screen. Below the > code that I use to launch the Activity: > > <------------------ Sanitized code snipped from class that extends > AppWidgetProvider (MyWidgetProvider) -------> > @Override > public void onUpdate(Context context, AppWidgetManager > appWidgetManager, int[] appWidgetIds) { > > super.onUpdate(context, appWidgetManager, appWidgetIds); > > Intent defineIntent = new Intent(Intent.ACTION_MAIN); > defineIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK + > Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED); > defineIntent.addCategory("android.intent.category.LAUNCHER"); > defineIntent.setClassName(context, "com.mycompany.myapp.MainClass"); > > PendingIntent pendingIntent = PendingIntent.getActivity > (context, > 0 , defineIntent, 0); > updateViews.setOnClickPendingIntent(R.id.widget, > pendingIntent); > > // Push updates to the home screen > ComponentName thisWidget = new ComponentName(context, > MyWidgetProvider.class); > AppWidgetManager manager = AppWidgetManager.getInstance > (context); > manager.updateAppWidget(thisWidget, updateViews); > } > <------------------ Sanitized code snipped -------> > > Here's what happens (I test emulator only at this point): Upon the > first click, the Activity crashes. Dialog box: "Sorry! The application > MyApp (process (com.mycompany.myapp) has stopped unexpectedly. Please > try again." > With the second tap on the widget, the Activity launches. So I assume > I've got the correct intent filter settings. Below the log following > the first tap: > > <---------------- Sanitized class not found log -----------------> > 05-19 05:03:25.897: ERROR/AndroidRuntime(688): Uncaught handler: > thread main exiting due to uncaught exception > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): > java.lang.RuntimeException: Unable to instantiate activity > ComponentInfo{com.mycompany.myapp/com.mycompany.myapp.MainClass}: > java.lang.ClassNotFoundException: com.mycompany.myapp.MainClassin > loader dalvik.system.pathclassloa...@43594610 > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.app.ActivityThread.performLaunchActivity(ActivityThread.java: > 2194) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.app.ActivityThread.handleLaunchActivity(ActivityThread.java: > 2284) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.app.ActivityThread.access$1800(ActivityThread.java:112) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.os.Handler.dispatchMessage(Handler.java:99) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.os.Looper.loop(Looper.java:123) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.app.ActivityThread.main(ActivityThread.java:3948) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > java.lang.reflect.Method.invokeNative(Native Method) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > java.lang.reflect.Method.invoke(Method.java:521) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run > (ZygoteInit.java:782) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > dalvik.system.NativeStart.main(Native Method) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): Caused by: > java.lang.ClassNotFoundException: com.mycompany.myapp.MainClassin > loader dalvik.system.pathclassloa...@43594610 > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > java.lang.ClassLoader.loadClass(ClassLoader.java:573) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > java.lang.ClassLoader.loadClass(ClassLoader.java:532) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.app.Instrumentation.newActivity(Instrumentation.java:1097) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): at > android.app.ActivityThread.performLaunchActivity(ActivityThread.java: > 2186) > 05-19 05:03:25.996: ERROR/AndroidRuntime(688): ... 11 more > <---------------- Sanitized class not found log -----------------> > > After trying different configurations I've run out of ideas. Thanks in > advance for your help! > > > > -- Dianne Hackborn Android framework engineer [email protected] 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. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
