proguardが有効になっているとアプリがクラッシュする

Question

proguardを有効にしているときに、minify enabled falseを設定すると、完全に実行され、逃した内容が分からないので、助けてください。私はプロガードに追加する何かを欠場していると思うが、私はスタジオがapkをうまく構築したことを理解していない？

java.lang.NullPointerException at co.crowdie.a.b.a(Unknown Source) 
    at co.crowdie.a.b.a(Unknown Source) 
    at android.support.v7.widget.RecyclerView$a.a(Unknown Source) 
    at android.support.v7.widget.RecyclerView$a.b(Unknown Source) 
    at android.support.v7.widget.RecyclerView$n.a(Unknown Source) 
    at android.support.v7.widget.RecyclerView$n.c(Unknown Source) 
    at android.support.v7.widget.LinearLayoutManager$c.a(Unknown Source) 
    at android.support.v7.widget.LinearLayoutManager.a(Unknown Source) 
    at android.support.v7.widget.LinearLayoutManager.a(Unknown Source) 
    at android.support.v7.widget.LinearLayoutManager.c(Unknown Source) 
    at android.support.v7.widget.RecyclerView.J(Unknown Source) 
    at android.support.v7.widget.RecyclerView.k(Unknown Source) 
    at android.support.v7.widget.RecyclerView.onLayout(Unknown Source) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.support.design.widget.m.b(Unknown Source) 
    at android.support.design.widget.aa.a(Unknown Source) 
    at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.a(Unknown 
    Source)              at 
    android.support.design.widget.CoordinatorLayout.onLayout(Unknown Source) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1160) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:450) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888) 
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742) 
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1651) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:450) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888) 
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742) 
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1651) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:450) 
    at android.view.View.layout(View.java:15125) 
    at android.view.ViewGroup.layout(ViewGroup.java:4862) 
    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2317) 
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2023) 
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1189) 
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6223) 
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788) 
    at android.view.Choreographer.doCallbacks(Choreographer.java:591) 
    at android.view.Choreographer.doFrame(Choreographer.java:560) 
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java 
    :774)              at 
    android.os.Handler.handleCallback(Handler.java:808) 
    at android.os.Handler.dispatchMessage(Handler.java:103) 
    at android.os.Looper.loop(Looper.java:193) 
    at android.app.ActivityThread.main(ActivityThread.java:5292) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java: 
    828) 
    at 
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:644) 
    at dalvik.system.NativeStart.main(Native Method) 

Answer 1

あなたProGuardのルールファイルに以下の行を追加して再試行してください：

-dontwarn android.support.design.** 
-keep class android.support.design.** { *; } 
-keep interface android.support.design.** { *; } 
-keep public class android.support.design.R$* { *; } 

-keep public class android.support.v7.widget.** { *; } 
-keep public class android.support.v7.internal.widget.** { *; } 
-keep public class android.support.v7.internal.view.menu.** { *; } 

-keep public class * extends android.support.v4.view.ActionProvider { 
public <init>(android.content.Context); 
} 

また、これらは、あなたがより良いあなたのProGuardのルールを持っているdefualtのものです：

-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 * extends android.view.View { 
public <init>(android.content.Context); 
public <init>(android.content.Context, android.util.AttributeSet); 
public <init>(android.content.Context, android.util.AttributeSet, int); 
public void set*(...); 
} 

-keepclasseswithmembers class * { 
public <init>(android.content.Context, android.util.AttributeSet); 
} 

-keepclasseswithmembers class * { 
public <init>(android.content.Context, android.util.AttributeSet, int); 
} 

-keepclassmembers class * extends android.content.Context { 
public void *(android.view.View); 
public void *(android.view.MenuItem); 
} 

-keepclassmembers class * implements android.os.Parcelable { 
static ** CREATOR; 
} 

-keepclassmembers class **.R$* { 
public static <fields>; 
} 

-keepclassmembers class * { 
@android.webkit.JavascriptInterface <methods>; 
} 

-dontwarn android.support.**