这可能是sdk更新不完全造成的，需要重新手动更新一下。
1、Eclipse--->Window--->Android SDK And AVD Manager(或者直接在Android解压目录底下运行SDK Setup.exe)
2、选择installed packages，在右边列表中选择SDK tools ，点击 update all
等待更新完毕就OK了！
原因：
SDK不完整。
解决方法：
方法一
可在 /android-sdk-windows/tools/lib/目录下新建一个proguard.cfg文件
然后添下以下内容：
proguard.cfg - optimizationpasses 5 - dontusemixedcaseclassnames - dontskipnonpubliclibraryclasses - dontpreverify - verbose - optimizations !code / simplification / arithmetic,!field /* ,!class / merging /* - keep public class * extends android.app.Activity - keep public class * extends android.app.Application - keep public class * extends android.app.Service - keep public class * extends android.content.BroadcastReceiver - keep public class * extends android.content.ContentProvider - keep public class com.android.vending.licensing.ILicensingService - keepclasseswithmembernames class * { native <methods>; } - keepclasseswithmembernames class * { public <init>(android.content.Context, android.util.AttributeSet); } - keepclasseswithmembernames class * { public <init>(android.content.Context, android.util.AttributeSet, int); } - keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } - keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; }
方法二
通过Android SDK and AVD Manager更新所有SDK。
