检索失败在包图标 [英] Failure retrieving icon in package

问题描述

我的Andr​​oid应用程序最近显示了一些奇怪的行为。下面包含的NullPointerException仅在特定设备抛出，例如采用Android 2.3.4一个摩托罗拉Defy装置产生此异常。虽然它工作正常上一个升级Froyo 2.3.6 Nexus One和2.2。 HTC Desire的，以及在Honeycomb平板电脑。有趣的是，我没有在任何地方访问APPICON自己在code。这里是堆栈跟踪，由摩托罗拉Defy抛出：

my Android app recently shows some strange behavior. The below included NullPointerException is thrown only on specific devices, for example a Motorola Defy device with Android 2.3.4 produces this Exception. Although it works fine on a Froyo 2.3.6 Nexus One and 2.2. HTC Desire, as well on Honeycomb tablet devices. The interesting thing is, I do not access the AppIcon myself anywhere in the code. Here is the Stack trace, thrown by the Motorola Defy:

W/PackageManager(14947): Failure retrieving icon 0x7f020004 in package com.a.project
W/PackageManager(14947): java.lang.NullPointerException
W/PackageManager(14947):    at android.app.ActivityThread$ResourcesKey.<init>(ActivityThread.java:1138)
W/PackageManager(14947):    at android.app.ActivityThread.getTopLevelResources(ActivityThread.java:1207)
W/PackageManager(14947):    at android.app.ActivityThread.getTopLevelResources(ActivityThread.java:1266)
W/PackageManager(14947):    at android.app.ContextImpl$ApplicationPackageManager.getResourcesForApplication(ContextImpl.java:2439)
W/PackageManager(14947):    at android.app.ContextImpl$ApplicationPackageManager.getDrawable(ContextImpl.java:2332)
W/PackageManager(14947):    at android.content.pm.PackageItemInfo.loadIcon(PackageItemInfo.java:140)
W/PackageManager(14947):    at android.app.ContextImpl$ApplicationPackageManager.getApplicationIcon(ContextImpl.java:2387)
W/PackageManager(14947):    at com.motorola.filemanager.utils.IconifiedText.buildIconItem(IconifiedText.java:287)
W/PackageManager(14947):    at com.motorola.filemanager.local.DirectoryScanner.run(DirectoryScanner.java:83)

之后做一些研究，我发现下面的文章，导致没有具体的答案，这可能是问题的原因：
结果 HTTP：//$c$c.google。 COM / p /安卓/问题/细节？ID = 9151

我确信设置以下权限清单文件：

I made sure to set the following permission in the Manifest file:

android.permission.WRITE_EXTERNAL_STORAGE

唯一的地方，在那里我访问软件包管理系统在我的code是retreival的versionName用途：

The only place, where I access the PackageManager in my code is for versionName retreival purposes:

try {
    PackageManager manager = context.getPackageManager();
    return manager.getPackageInfo(context.getPackageName(), 0).versionCode;
} catch (Exception e) {
    e.printStackTrace();
}

没有任何人有什么线索可能会导致这个问题？

Does anybody have a clue what could cause this problem?

最好的问候，结果
米蒂亚

Best regards,
Mitja

推荐答案

空指针异常是

om.motorola.filemanager.utils.IconifiedText.buildIconItem(IconifiedText.java:287).
android.content.pm.PackageItemInfo.loadIcon(PackageItemInfo.java:140). 

所以我猜你的项目在某处加载的apk文件的图标。之前 loadIcon 您应该添加以下两行：

pkg.applicationInfo.sourceDir = "apkpath";  //"apkpath" is your apk's absolute path
pkg.applicationInfo.publicSourceDir = "apkpath";

这篇关于检索失败在包图标的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！