学步园

解决方法一：在android-sdk-windows\tools\lib\ 目录下新建 proguard.cfg内容如下

-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 ;
}
-keepclasseswithmembernames
class * {
public (android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembernames
class * {
public (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 *;

}

解决方法二：

通过Android SDK and AVD Manager更新SDK。

推荐第一种方法。