android - 将自定义可打包对象额外或在 ArrayList 中传递给 RemoteViewsService 会中断 appwidget

Question

基本上我想做的是通过一个 Intent 将一个自定义的 parcelable 对象传递给 RemoteViewsService，从而传递给我的 RemoteViewsFactory。出于某种原因，这根本行不通:S 每当我尝试这样做时，小部件最终都会显示“问题加载小部件”文本。

当我尝试同样的事情时，我没有将它传递给 RemoteViewsService，而是将它传递给常规 Activity，它完全按预期工作。

我试图在网上找到我的答案，但我一直没有成功，因此我现在在这里发帖希望得到帮助。

一段时间以来，我一直试图让它在我的主程序中运行。但我就是想不通。所以我试着把它归结起来，看看我是否在某个时候做错了什么。我成功地重现了问题，我重现问题的基础来自 CommonsGuy 的 LoremWidget ( https://github.com/commonsguy/cw-advandroid/tree/master/AppWidget/LoremWidget ) 和一个随机的可打包示例 ( http://prasanta-paul.blogspot.dk/2010/06/android-parcelable-example.htm l)，我修改了它以显示我的问题。 (希望我不会遇到麻烦，已经使用了这两个链接上的代码)

这是上传到随机文件主机的完整代码，以防有人想测试我所说的内容: http://www.filedropper.com/remoteviewserviceparcelerrorexample

总结一下我的问题:

为什么我不能将我的可打包对象(单独或包装在 ArrayList 中)传递到我的 RemoteViewsService？ (当相同的代码适用于 Activity 时)

我真的希望有人能够帮助我。现在在我的主程序中，我正在序列化到内部存储，然后几乎立即从 RemoteViewsService 再次反序列化它，据我所知，这不是很有效!

编辑:只记得，出于某种原因，在我的主程序中，如果我传递一个自定义对象，并将 ArrayList 和 Strings 设置为 null，并且 bool 值全部为 false(基本上就是对象在创建时的样子)，小部件看起来正常(即没有“问题加载小部件”消息)。

编辑:在查看了外观(未过滤到我正在运行的应用程序)之后，我现在看到了一些错误(我想我最好学会在没有任何文件时查看所有未过滤的内容:)):

     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

Answer 1

我最终做了 TreKing 在这里谈论的事情: 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.

然后按照他的代码示例:

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);

就像我期望整个 Parcel 交易从一开始就做的那样工作! :)