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由于安装apk的VersionCode高于已有当前程序
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.my.test" android:versionCode="48" android:versionName="3.0.0" >
Installation error:INSTALL_FAILED_VERSION_DOWNGRADE
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原文地址:http://www.cnblogs.com/huangjianan/p/4221658.html