我将 SPen 和 Chord 集成到我公司的 android 游戏中，结果当我尝试使用混淆构建应用程序时，我收到以下错误（警告 - 它很长）：
Proguard returned with error code 1. See console
Proguard Error 1
Output:
Warning: android.sec.multiwindow.Constants$WindowManagerPolicy: can't find referenced class android.view.WindowManagerPolicy
Warning: android.sec.multiwindow.MultiWindowManager: can't find referenced method 'java.util.List getRunningTasks(int,int,android.app.IThumbnailReceiver)' in class android.app.ActivityManager
Warning: com.google.common.base.Absent: can't find referenced class javax.annotation.Nullable
Warning: com.google.common.base.Absent: can't find referenced class javax.annotation.Nullable
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
Warning: com.google.common.base.CharMatcher: can't find referenced class javax.annotation.CheckReturnValue
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Warning: com.samsung.sdraw.CanvasView: can't find referenced field 'android.text.Layout$Alignment ALIGN_LEFT' in class android.text.Layout$Alignment
Warning: com.samsung.sdraw.CanvasView: can't find referenced field 'android.text.Layout$Alignment ALIGN_RIGHT' in class android.text.Layout$Alignment
Warning: com.samsung.sdraw.CanvasView: can't find referenced method 'void setCursorColor(int)' in class com.samsung.sdraw.t
Warning: com.samsung.sdraw.PresetListItem: can't find referenced method 'void setHoverPopupType(int)' in class android.widget.ImageButton
Warning: com.samsung.sdraw.ad: can't find referenced method 'void setHoverPopupType(int)' in class android.view.View
Warning: com.samsung.sdraw.ae: can't find referenced method 'void setHoverPopupType(int)' in class android.view.View
Warning: com.samsung.sdraw.bf: can't find referenced method 'void setHoverPopupType(int)' in class android.view.View
Warning: com.samsung.sdraw.bf: can't find referenced method 'void setHoverPopupType(int)' in class com.samsung.sdraw.CustomSeekBar
Warning: com.samsung.sdraw.bf: can't find referenced method 'void setHoverPopupType(int)' in class com.samsung.sdraw.dl
Warning: com.samsung.sdraw.bg: can't find referenced method 'void setHoverPopupType(int)' in class android.view.View
Warning: com.samsung.sdraw.bg: can't find referenced method 'void setHoverPopupType(int)' in class com.samsung.sdraw.CustomSeekBar
Warning: com.samsung.sdraw.bg: can't find referenced method 'void setHoverPopupType(int)' in class com.samsung.sdraw.dl
Warning: com.samsung.sdraw.bo: can't find referenced method 'void setHoverPopupType(int)' in class android.widget.ImageButton
Warning: com.samsung.sdraw.dh: can't find referenced method 'void setHoverPopupType(int)' in class com.samsung.sdraw.dl
Warning: com.samsung.sdraw.di: can't find referenced method 'void setHoverPopupType(int)' in class com.samsung.sdraw.dl
Warning: com.samsung.sdraw.w: can't find referenced method 'void setHoverPopupType(int)' in class android.widget.SeekBar
Warning: com.samsung.sdraw.x: can't find referenced method 'void setHoverPopupType(int)' in class android.widget.SeekBar
You should check if you need to specify additional program jars.
Warning: there were 1071 unresolved references to classes or interfaces.
You may need to specify additional library jars (using '-libraryjars').
Warning: there were 18 unresolved references to program class members.
Your input classes appear to be inconsistent.
You may need to recompile them and try again.
Alternatively, you may have to specify the option
'-dontskipnonpubliclibraryclassmembers'.
java.io.IOException: Please correct the above warnings first.
at proguard.Initializer.execute(Initializer.java:321)
at proguard.ProGuard.initialize(ProGuard.java:211)
at proguard.ProGuard.execute(ProGuard.java:86)
at proguard.ProGuard.main(ProGuard.java:492)
SPen 库不知何故涉及此错误，但我使用的是 2.3 版本，因此应该修复它。任何帮助将不胜感激！