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Basically what i want to do, is to pass a custom parcelable object via an intent, to the RemoteViewsService and thus to my RemoteViewsFactory. For some reason, this simply doesnt work :S Whenever i attempt to do this, the widget ends up displaying the "Problem loading widget" text instead.
When i try the same thing, but instead of passing it to the RemoteViewsService, i just pass it to a regular Activity, it works exactly as expected.
I've tried to find my answer online, but I've been unsuccessfull, hence i now post here in hope of being helped.
I've been trying to get this to work in my main program for a while. But i just couldnt figure it out. So i tried to boil it down, to see if somehow i did something wrong at some point. I succeded in recreating the problem, and the base on which i recreated my problem is from CommonsGuy's LoremWidget ( https://github.com/commonsguy/cw-advandroid/tree/master/AppWidget/LoremWidget ) and a random parcelable example ( http://prasanta-paul.blogspot.dk/2010/06/android-parcelable-example.htm l) which i've modified to work to show my problem. (hope i wont get into trouble, having used the code on these two links)
Heres the full code uploaded on random filehost in case anyone wants to testrun what i'm talking about: http://www.filedropper.com/remoteviewserviceparcelerrorexample
So to sum up my question:
Why can't i pass my parcelable objects (either alone, or wrapped in an ArrayList) to my RemoteViewsService? (When the same code works just fine with an Activity)
I really hope someone will be able to help me out. Right now in my main program im serializing to internal storage and then deserializing it again from the RemoteViewsService pretty much immedietly after, which from all I've read, can't be very effecient!
Edit: Just remembered, that for some reason in my main program, if i pass one of the custom objects, with the ArrayList and Strings set to null, and the booleans all to false (basically exactly how the object looks upon creation), the widget looks normal (ie. no "Problem loading widget" message).
Edit: After having looked at the look (not filtered to the app i was running) i now see some errors (guess i better learn to look at it all unfiltered when i get nothing filered :)):
11-13 17:14:27.268: D/AndroidRuntime(8840): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
11-13 17:14:27.268: D/AndroidRuntime(8840): CheckJNI is ON
11-13 17:14:27.340: D/AndroidRuntime(8840): Calling main entry com.android.commands.pm.Pm
11-13 17:14:27.348: W/ActivityManager(90): No content provider found for permission revoke: file:///data/local/tmp/com.commonsware.android.appwidget.lorem.LoremActivity.apk
11-13 17:14:27.348: W/ActivityManager(90): No content provider found for permission revoke: file:///data/local/tmp/com.commonsware.android.appwidget.lorem.LoremActivity.apk
11-13 17:14:27.356: I/PackageManager(90): Removing non-system package:com.commonsware.android.appwidget.lorem
11-13 17:14:27.360: I/ActivityManager(90): Force stopping package com.commonsware.android.appwidget.lorem uid=10034
11-13 17:14:27.360: I/ActivityManager(90): Killing proc 8798:com.commonsware.android.appwidget.lorem/10034: force stop
11-13 17:14:27.400: D/dalvikvm(90): GC_CONCURRENT freed 511K, 17% free 8611K/10311K, paused 0ms+0ms
11-13 17:14:27.400: I/PackageManager(90): Package com.commonsware.android.appwidget.lorem codePath changed from /data/app/com.commonsware.android.appwidget.lorem-2.apk to /data/app/com.commonsware.android.appwidget.lorem-1.apk; Retaining data and using new
11-13 17:14:27.404: I/PackageManager(90): Running dexopt on: com.commonsware.android.appwidget.lorem
11-13 17:14:27.440: D/dalvikvm(8850): DexOpt: load 12ms, verify+opt 4ms
11-13 17:14:27.448: W/PackageManager(90): Code path for pkg : com.commonsware.android.appwidget.lorem changing from /data/app/com.commonsware.android.appwidget.lorem-2.apk to /data/app/com.commonsware.android.appwidget.lorem-1.apk
11-13 17:14:27.448: W/PackageManager(90): Resource path for pkg : com.commonsware.android.appwidget.lorem changing from /data/app/com.commonsware.android.appwidget.lorem-2.apk to /data/app/com.commonsware.android.appwidget.lorem-1.apk
11-13 17:14:27.452: I/ActivityManager(90): Force stopping package com.commonsware.android.appwidget.lorem uid=10034
11-13 17:14:27.460: D/PackageManager(90): New package installed in /data/app/com.commonsware.android.appwidget.lorem-1.apk
11-13 17:14:27.472: I/ActivityManager(90): Force stopping package com.commonsware.android.appwidget.lorem uid=10034
11-13 17:14:27.496: D/dalvikvm(266): GC_EXPLICIT freed 127K, 9% free 6766K/7367K, paused 0ms+0ms
11-13 17:14:27.512: D/dalvikvm(221): GC_EXPLICIT freed 878K, 57% free 15010K/34119K, paused 0ms+0ms
11-13 17:14:27.584: D/dalvikvm(90): GC_EXPLICIT freed 385K, 18% free 8558K/10311K, paused 0ms+0ms
11-13 17:14:27.588: D/PackageManager(90): generateServicesMap(android.accounts.AccountAuthenticator): 2 services unchanged
11-13 17:14:27.620: D/PackageManager(90): generateServicesMap(android.content.SyncAdapter): 4 services unchanged
11-13 17:14:27.620: D/BackupManagerService(90): Received broadcast Intent { act=android.intent.action.PACKAGE_REMOVED dat=package:com.commonsware.android.appwidget.lorem flg=0x10000010 (has extras) }
11-13 17:14:27.620: D/PackageManager(90): generateServicesMap(android.accounts.AccountAuthenticator): 2 services unchanged
11-13 17:14:27.620: D/PackageManager(90): generateServicesMap(android.content.SyncAdapter): 4 services unchanged
11-13 17:14:27.628: W/ResourceType(90): Failure getting entry for 0x7f060000 (t=5 e=0) in package 0 (error -75)
11-13 17:14:27.632: D/BackupManagerService(90): Received broadcast Intent { act=android.intent.action.PACKAGE_ADDED dat=package:com.commonsware.android.appwidget.lorem flg=0x10000010 (has extras) }
11-13 17:14:27.636: V/BackupManagerService(90): updatePackageParticipantsLocked: #1
11-13 17:14:27.640: W/RecognitionManagerService(90): no available voice recognition services found
11-13 17:14:27.652: D/dalvikvm(8854): Not late-enabling CheckJNI (already on)
11-13 17:14:27.684: I/ActivityManager(90): Start proc com.commonsware.android.appwidget.lorem for broadcast com.commonsware.android.appwidget.lorem/.WidgetProvider: pid=8854 uid=10034 gids={}
11-13 17:14:27.688: D/BackupManagerService(90): Received broadcast Intent { act=android.intent.action.PACKAGE_REPLACED dat=package:com.commonsware.android.appwidget.lorem flg=0x10000010 (has extras) }
11-13 17:14:27.688: V/BackupManagerService(90): updatePackageParticipantsLocked: #1
11-13 17:14:27.740: I/dalvikvm(8854): Turning on JNI app bug workarounds for target SDK version 11...
11-13 17:14:27.756: D/dalvikvm(90): GC_EXPLICIT freed 409K, 16% free 8687K/10311K, paused 0ms+4ms
11-13 17:14:27.792: D/AndroidRuntime(8840): Shutting down VM
11-13 17:14:27.796: D/dalvikvm(8840): GC_CONCURRENT freed 99K, 79% free 447K/2048K, paused 0ms+0ms
11-13 17:14:27.796: D/dalvikvm(8840): Debugger has detached; object registry had 1 entries
11-13 17:14:27.812: I/AndroidRuntime(8840): NOTE: attach of thread 'Binder Thread #3' failed
11-13 17:14:27.820: D/WidgetProvider(8854): ParcelData=ParcelData [id=0, name=null, desc=null, cities=[suwon, delhi]]
11-13 17:14:27.820: D/WidgetProvider(8854): ArrayList<ParcelData>=[ParcelData [id=0, name=null, desc=null, cities=[suwon, delhi]]]
11-13 17:14:27.824: V/ParcelData(8854): writeToParcel...0
11-13 17:14:27.824: V/ParcelData(8854): writeToParcel...0
11-13 17:14:27.828: V/ParcelData(8854): writeToParcel...0
11-13 17:14:27.828: V/ParcelData(8854): writeToParcel...0
11-13 17:14:27.828: E/Parcel(221): Class not found when unmarshalling: com.commonsware.android.appwidget.lorem.ParcelData, e: java.lang.ClassNotFoundException: com.commonsware.android.appwidget.lorem.ParcelData
11-13 17:14:27.832: W/AppWidgetHostView(221): updateAppWidget couldn't find any view, using error view
11-13 17:14:27.832: W/AppWidgetHostView(221): android.os.BadParcelableException: ClassNotFoundException when unmarshalling: com.commonsware.android.appwidget.lorem.ParcelData
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Parcel.readParcelable(Parcel.java:1966)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Parcel.readValue(Parcel.java:1854)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Parcel.readListInternal(Parcel.java:2103)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Parcel.readArrayList(Parcel.java:1544)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Parcel.readValue(Parcel.java:1875)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Parcel.readMapInternal(Parcel.java:2094)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Bundle.unparcel(Bundle.java:223)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Bundle.putInt(Bundle.java:436)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.content.Intent.putExtra(Intent.java:4695)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.widget.RemoteViews$SetRemoteViewsAdapterIntent.apply(RemoteViews.java:401)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.widget.RemoteViews.performApply(RemoteViews.java:1606)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.widget.RemoteViews.apply(RemoteViews.java:1583)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.appwidget.AppWidgetHostView.updateAppWidget(AppWidgetHostView.java:289)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.appwidget.AppWidgetHost.updateAppWidgetView(AppWidgetHost.java:283)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.appwidget.AppWidgetHost$UpdateHandler.handleMessage(AppWidgetHost.java:84)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Handler.dispatchMessage(Handler.java:99)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.os.Looper.loop(Looper.java:137)
11-13 17:14:27.832: W/AppWidgetHostView(221): at android.app.ActivityThread.main(ActivityThread.java:4424)
11-13 17:14:27.832: W/AppWidgetHostView(221): at java.lang.reflect.Method.invokeNative(Native Method)
11-13 17:14:27.832: W/AppWidgetHostView(221): at java.lang.reflect.Method.invoke(Method.java:511)
11-13 17:14:27.832: W/AppWidgetHostView(221): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
11-13 17:14:27.832: W/AppWidgetHostView(221): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
11-13 17:14:27.832: W/AppWidgetHostView(221): at dalvik.system.NativeStart.main(Native Method)
11-13 17:14:28.116: D/AndroidRuntime(8872): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
11-13 17:14:28.116: D/AndroidRuntime(8872): CheckJNI is ON
11-13 17:14:28.200: D/AndroidRuntime(8872): Calling main entry com.android.commands.am.Am
11-13 17:14:28.204: I/ActivityManager(90): START {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.commonsware.android.appwidget.lorem/.LoremActivity} from pid 8872
11-13 17:14:28.208: W/WindowManager(90): Failure taking screenshot for (192x135) to layer 21020
11-13 17:14:28.220: W/NetworkManagementSocketTagger(90): setKernelCountSet(10034, 1) failed with errno -2
11-13 17:14:28.240: D/AndroidRuntime(8872): Shutting down VM
11-13 17:14:28.244: D/dalvikvm(8872): GC_CONCURRENT freed 100K, 77% free 475K/2048K, paused 4ms+0ms
11-13 17:14:28.244: D/dalvikvm(8872): Debugger has detached; object registry had 1 entries
11-13 17:14:28.244: I/AndroidRuntime(8872): NOTE: attach of thread 'Binder Thread #1' failed
11-13 17:14:28.252: W/InputManagerService(90): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@b38c3ef0
11-13 17:14:28.504: W/NetworkManagementSocketTagger(90): setKernelCountSet(10034, 0) failed with errno -2
656
This is a simple object which keeps user related data. User object implements as Parcelable. There are two methods to override from Parcelable interface describeContents and writeToParcel. Actual object serialization do in writeToParcel method. Object need to have Parcelable.Creator.
The idea of a parcelable object Android is similar to Serialization in core Java. The differences are the parcelable is more optimized to pass data between activties or fragments in Android, so it is much faster than serialization. A parcelable object does the marshaling and unmarshaling of the data to avoid creating garbage objects.
The differences are the parcelable is more optimized to pass data between activties or fragments in Android, so it is much faster than serialization. A parcelable object does the marshaling and unmarshaling of the data to avoid creating garbage objects.
When need to pass custom object between activities we can mark the object as Parcelable (Implement the Parcelable interface). Then object capable to put in to an intent with intent.putExtra method
I ended up doing what TreKing talks about here: https://groups.google.com/d/msg/android-developers/KX0BUAbOTKY/jqW_ZokCH3gJ
What I've done is create a "Bundleable" interface that basically does what Parcelable is intended to do. Objects extending this interface can put themselves and recreate themselves from a Bundle object, which is itself Parcelable so you can send it around just like your object - except with the minor fact that the system always knows how to load a Bundle type so you don't run into this error.
And following his code example:
public interface Bundleable
{
public Bundle toBundle();
public void fromBundle(Bundle b);
}
public class MyClass implements Bundleable
{
public Bundle toBundle()
{
Bundle b = new Bundle();
// Fill b with data
return b;
}
public void from Bundle(Bundle b)
{
// set properties from data in b
}
}
// ...
MyClass m = new MyClass();
Intent i = new Intent();
i.putBundleExtra("MyClass", m.toBundle());
// ... Elsewhere
Bundle b = intent.getBundleExtra("MyClass");
MyClass m = new MyClass(b); // Constructor calls fromBundle(b);
Worked like i'd expected the whole Parcel deal to do from the beginning! :)
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