Question

基本上我想做的是将自定义的parcelable对象通过intent传递给RemoteViewsService，从而传递给我的RemoteViewsFactory。出于某种原因，这根本不起作用：S每当我尝试这样做时，小部件最终会显示“问题加载小部件”文本。

当我尝试相同的事情，但我没有将它传递给RemoteViewsService，而是将其传递给常规的Activity，它完全按照预期工作。

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

我一直试图让这个在我的主程序中运行一段时间。但我无法弄明白。所以我试着将它煮沸，看看我是否在某种程度上做错了什么。我成功地重新创建了这个问题，我重新创建问题的基础是来自CommonsGuy的LoremWidget（https://github.com/commonsguy/cw-advandroid/tree/master/AppWidget/LoremWidget）和一个随机的可以说明的例子（http://prasanta-paul.blogspot.dk/2010/06/android-parcelable-example.htm l），我已经修改过它以显示我的问题问题。（希望我不会遇到麻烦，在这两个链接上使用了代码）

下载随机文件主机上的完整代码，以防有人想要测试我正在谈论的内容： http://www.filedropper.com/remoteviewserviceparcelerrorexample

总结一下我的问题：

为什么我不能将我的parcelable对象（单独或包含在ArrayList中）传递给我的RemoteViewsService？（当相同的代码与Activity一起使用时）

我真的希望有人能够帮助我。现在，在我的主程序中，我将序列化到内部存储，然后从RemoteViewsService再次反序列化，几乎是在我读完之后，这是非常有效的！

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

编辑：在看了一下外观（没有过滤到我正在运行的应用程序）后，我现在看到了一些错误（猜测我最好学会在未获得任何文件的情况下将其全部未经过滤：））:( / p>

     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在这里谈到的事情： https://groups.google.com/d/msg/android-developers/KX0BUAbOTKY/jqW_ZokCH3gJ

我所做的是创建一个基本上可以实现的“Bundleable”界面 Parcelable打算做什么。扩展此接口的对象可以放置自己并从Bundle对象中重新创建自己它本身是Parcelable所以你可以像对象一样发送它 - 除了系统总是知道如何加载一个小事实捆绑类型，因此您不会遇到此错误。

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);

工作就像我期望整个包裹交易从一开始就做！：）

Answer 2

我遇到了与Serializable对象ArrayList相同的问题。当我试图像这样在AppWidgetManager中传递列表时

Intent listIntent = new Intent(context, WidgetService.class);
listIntent.putExtra("list", myList);

它只是没有用。但是将相同的数据放在一个包中，然后将其作为一个额外的工作。

Intent listIntent = new Intent(context, WidgetService.class);
Bundle extrasBundle = new Bundle();
extrasBundle.putSerializable("list", myList);
listIntent.putExtra("bundle", extrasBundle);

我在堆栈溢出处找到了一篇文章，用户解释了直接或捆绑中添加额外内容之间的区别： Advantages of using Bundle instead of direct Intent putExtra() in Android 它看起来很有效，因为只有将一个额外的东西放入一个包中，才有可能通过多个意图传递它。

Answer 3

如果使用Parcelable无法使用此功能，请自行完成。将ParcelData改为String。只需将writeToParcel()和ParcelData(Parcel source)方法转换为类似的内容（穷人的“序列化”）：

public String serializeToString() {
    StringBuilder sb = new StringBuilder();
    sb.append(Integer.toString(id)).append('|').append(name).append('|').append(desc)
        .append('|');
    for (String c : cities) {
        sb.append(c).append(';');
    }
    sb.append('|');
    return sb.toString();
}

ParcelData(String source) {
    String[] parts = source.split("|");
    id = Integer.parseInt(parts[0]);
    name = parts[1];
    desc = parts[2];
    cc = parts[3].split(";");
    if (cc.length == 0) {
        cities = new String[0]; // No cities
    } else {
        cities = new String[cc.length - 1]; // Last element is empty
        for (int i = 0; i < cc.length - 1; i++) {
            cities[i] = cc[i];
        }
    }
}

我没有通过编译器运行它，所以它可能有愚蠢的语法错误。你应该明白这个想法。

Answer 4

我知道为时已晚，我的意思是太晚了，但今天我遇到了同样的问题，找到了一个最小代码行的解决方案。决定与解决方案分享。因此，基本上您可以使用Google的Gson API将任何对象（甚至是对象列表）转换为字符串。看看：

ComplextObject object=new ComplexObject();
Type type = new TypeToken<ComplextObject>() {}.getType();
intent.putExtra("key",convertToJsonString(object,type)); //that's it

或者“在另一边”阅读此对象：

String jsonString=intent.getStringExtra("key");
Type type = new TypeToken<ComplexObject>() {}.getType();
ComplexObject object=convertFromJsonString(jsonString,type);

以下是convertToJsonString和convertFromJsonString方法：

public static <T> T convertFromJsonString(String jsonString, Type type){
    if(jsonString==null) return null;
    Gson gson=new Gson();
    return gson.fromJson(jsonString,type);
}

public static String convertToJsonString(Object object, Type type){
    if(object==null) return null;
    Gson gson=new Gson();
    return gson.toJson(object,type);
}

将自定义parcelable对象extra或在ArrayList中传递给RemoteViewsService会破坏appwidget

4 个答案: