关于 Cannot install platform packages to user storage

原创于 2012-01-18 13:30:38 发布 · 2.4k 阅读

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文章标签：

#user #null #object #android

本文探讨了Android 2.3.7系统中对于带有platform签名的APK包安装到用户存储区的限制机制。通过分析核心源码，揭示了系统如何判断并阻止这类安装行为。

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Cannot install platform packages to user storage

这是由于android2.3.7上限制用户安装有platform签名的apk包

源码在

ANDROID/frameworks/base/services/java/com/android/server/PackageManagerService.java

        if (!pkg.applicationInfo.sourceDir.startsWith(Environment.getRootDirectory().getPath()) &&
                !pkg.applicationInfo.sourceDir.startsWith("/vendor")) {
            Object obj = mSettings.getUserIdLP(1000);
            Signature[] s1 = null;
            if (obj instanceof SharedUserSetting) {
                s1 = ((SharedUserSetting)obj).signatures.mSignatures;
            }
            if ((checkSignaturesLP(pkg.mSignatures, s1) == PackageManager.SIGNATURE_MATCH)) {
                Slog.w(TAG, "Cannot install platform packages to user storage");
                mLastScanError = PackageManager.INSTALL_FAILED_INVALID_INSTALL_LOCATION;
                return null;
            }
        }