ProGuardの後、アプリケーションがクラッシュし、何が原因なのか理解するのに役立ちますか？

Question

私は自分のアプリケーションを行っていますが、私はretrofit、rxJava、retrofit：converter-gsonを使用しています.ProGuardを使用してアプリケーションを保護することに決めました。proguard-android.txtをproguard-アプリケーションがエラーを受信：

Warning:okio.Okio: can't find referenced class java.nio.file.Path 
Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption 
Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption 
Warning:okio.Okio: can't find referenced class java.nio.file.Path 
Warning:okio.Okio: can't find referenced class java.nio.file.Files 
Warning:okio.Okio: can't find referenced class java.nio.file.Path 
Warning:okio.DeflaterSink: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement 
Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption 
Warning:okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement 
Warning:okio.Okio: can't find referenced class java.nio.file.OpenOption 
Warning:okio.Okio: can't find referenced class java.nio.file.Path 
Warning:Exception while processing task java.io.IOException: Please correct the above warnings first. 
Warning:there were 67 unresolved references to classes or interfaces. 
Warning:rx.internal.util.unsafe.UnsafeAccess: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.SpscUnboundedArrayQueue: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.SpscArrayQueue: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.SpmcArrayQueueProducerField: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.SpmcArrayQueueConsumerField: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.MpscLinkedQueue: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.MpmcArrayQueueProducerField: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.ConcurrentSequencedCircularArrayQueue: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.BaseLinkedQueueProducerNodeRef: can't find referenced class sun.misc.Unsafe 
Warning:retrofit.Platform$Java8: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement 
Warning:retrofit.Platform$Java8: can't find referenced class java.lang.invoke.MethodHandle 
Warning:okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement 
Warning:retrofit.Platform$Java8: can't find referenced class java.lang.invoke.MethodHandles$Lookup 
Warning:retrofit.Platform$Java8: can't find referenced class java.lang.invoke.MethodHandle 
Warning:retrofit.Platform$Java8: can't find referenced class java.lang.invoke.MethodHandles 
Warning:retrofit.Platform$Java8: can't find referenced class java.lang.invoke.MethodHandles 
Warning:retrofit.Platform$Java8: can't find referenced class java.lang.invoke.MethodHandles$Lookup 
Warning:rx.internal.util.unsafe.BaseLinkedQueueConsumerNodeRef: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.ConcurrentCircularArrayQueue: can't find referenced class sun.misc.Unsafe 
Warning:rx.internal.util.unsafe.MpmcArrayQueueConsumerField: can't find referenced class sun.misc.Unsafe 
Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'. 
> Job failed, see logs for details 

私はちょうど-dontwarnを使用する場合は、アプリケーションがエラーでクラッシュします：

02-22 19:38:16.998 31147-31147/? E/AndroidRuntime: FATAL EXCEPTION: main 
               Process: com.example.myapplication, PID: 31147 
               java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.example.myapplication.b.c.c()' on a null object reference 
                at com.example.myapplication.c.b$b.a(Unknown Source) 
                at com.example.myapplication.c.b.a(Unknown Source) 
                at android.support.v7.widget.RecyclerView$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.GridLayoutManager.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.GridLayoutManager.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:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.support.v4.widget.SwipeRefreshLayout.onLayout(Unknown Source) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1080) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.support.v4.view.ViewPager.onLayout(Unknown Source) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) 
                at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) 
                at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
                at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.support.v7.widget.ActionBarOverlayLayout.onLayout(Unknown Source) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
                at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) 
                at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) 
                at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
                at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
                at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678) 
                at android.view.View.layout(View.java:16653) 
                at android.view.ViewGroup.layout(ViewGroup.java:5438) 
                at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2198) 
                at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1958) 
                at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1134) 
                at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6045) 
                at android.view.Choreographer$CallbackRecord.run(Choreographer.java:860) 
                at android.view.Choreographer.doCallbacks(Choreographer.java:672) 
                at android.view.Choreographer.doFrame(Choreographer.java:608) 
                at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:846) 
                at android.os.Handler.handleCallback(Handler.java:739) 
                at android.os.Handler.dispatchMessage(Handler.java:95) 
                at android.os.Looper.loop(Looper.java:148) 
               at android.app.ActivityTh 

ProGuardの：

# This is a configuration file for ProGuard. 
# http://proguard.sourceforge.net/index.html#manual/usage.html 

-dontusemixedcaseclassnames 
-dontskipnonpubliclibraryclasses 
-verbose 

# Optimization is turned off by default. Dex does not like code run 
# through the ProGuard optimize and preverify steps (and performs some 
# of these optimizations on its own). 
-dontoptimize 
-dontpreverify 
# Note that if you want to enable optimization, you cannot just 
# include optimization flags in your own project configuration file; 
# instead you will need to point to the 
# "proguard-android-optimize.txt" file instead of this one from your 
# project.properties file. 

-keepattributes *Annotation* 
-keep public class com.google.vending.licensing.ILicensingService 
-keep public class com.android.vending.licensing.ILicensingService 

# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native 
-keepclasseswithmembernames class * { 
    native <methods>; 
} 

# keep setters in Views so that animations can still work. 
# see http://proguard.sourceforge.net/manual/examples.html#beans 
-keepclassmembers public class * extends android.view.View { 
    void set*(***); 
    *** get*(); 
} 

# We want to keep methods in Activity that could be used in the XML attribute onClick 
-keepclassmembers class * extends android.app.Activity { 
    public void *(android.view.View); 
} 

# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations 
-keepclassmembers enum * { 
    public static **[] values(); 
    public static ** valueOf(java.lang.String); 
} 

-keepclassmembers class * implements android.os.Parcelable { 
    public static final android.os.Parcelable$Creator CREATOR; 
} 

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

# The support library contains references to newer platform versions. 
# Don't warn about those in case this app is linking against an older 
# platform version. We know about them, and they are safe. 
-dontwarn android.support.** 

# Understand the @Keep support annotation. 
-keep class android.support.annotation.Keep 

-keep @android.support.annotation.Keep class * {*;} 

-keepclasseswithmembers class * { 
    @android.support.annotation.Keep <methods>; 
} 

-keepclasseswithmembers class * { 
    @android.support.annotation.Keep <fields>; 
} 

-keepclasseswithmembers class * { 
    @android.support.annotation.Keep <init>(...); 
} 

私のGradle：

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 24 
    buildToolsVersion "25.0.0" 
    defaultConfig { 
     applicationId "com.example.myapplication" 
     minSdkVersion 16 
     targetSdkVersion 24 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    buildTypes { 
     release { 
      minifyEnabled true 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

dependencies { 
    compile fileTree(include: ['*.jar'], dir: 'libs') 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile 'com.android.support:appcompat-v7:24.2.1' 
    testCompile 'junit:junit:4.12' 
    compile 'com.squareup.picasso:picasso:2.5.2' 
    compile 'com.android.support:recyclerview-v7:24.1.0' 
    compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2' 
    compile 'com.squareup.retrofit:retrofit:2.0.0-beta2' 
    compile 'com.jakewharton:butterknife:8.4.0' 
    compile 'com.pacioianu.david:ink-page-indicator:1.2.0' 
    compile 'io.reactivex:rxjava:1.1.1' 
    compile 'com.google.android.gms:play-services-ads:10.0.1' 
} 

私を助けてください！改造、rxjava、okio、ピカソ、サポート-V7-APPCOMPAT、butterknife-7：

は、私はすべてが働いてい を解決し、私はスニペット（https://github.com/krschultz/android-proguard-snippets）を追加しました。

## --------------- Start Project specifics --------------- ## 

-keep class com.example.yourapp.model.Yourmodel{ *; } 
-keep class com.example.yourapp.model.Yourmodel{ *; } 
-keep class com.example.yourapp.model.Yourmodel{ *; } 



# Keep the BuildConfig 
-keep class com.example.BuildConfig { *; } 

# Keep the support library 
-keep class android.support.v4.** { *; } 
-keep interface android.support.v4.** { *; } 

# Application classes that will be serialized/deserialized over Gson 
# or have been blown up by ProGuard in the past 

## ---------------- End Project specifics ---------------- ## 

そして、私のGradleは、次のようになります：私はproguard-rules.pro追加あなたのProGuardの規則にこれを追加すること

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 24 
    buildToolsVersion "25.0.0" 
    defaultConfig { 
     applicationId "com.example.application" 
     minSdkVersion 16 
     targetSdkVersion 24 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    buildTypes { 
     release { 
      minifyEnabled true 
      proguardFile 'proguard-rx-java.pro' 
      proguardFile 'proguard-square-retrofit.pro' 
      proguardFile 'proguard-square-picasso.pro' 
      proguardFile 'proguard-square-okio.pro' 
      proguardFile 'proguard-butterknife-7.pro' 
      proguardFile 'proguard-support-v7-appcompat.pro' 
      proguardFile 'proguard-rules.pro' 
      proguardFiles getDefaultProguardFile('proguard-android.txt') 
     } 
    } 
} 

dependencies { 
    compile fileTree(include: ['*.jar'], dir: 'libs') 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile 'com.android.support:appcompat-v7:24.2.1' 
    testCompile 'junit:junit:4.12' 
    compile 'com.squareup.picasso:picasso:2.5.2' 
    compile 'com.android.support:recyclerview-v7:24.1.0' 
    compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2' 
    compile 'com.squareup.retrofit:retrofit:2.0.0-beta2' 
    compile 'com.jakewharton:butterknife:8.4.0' 
    compile 'com.pacioianu.david:ink-page-indicator:1.2.0' 
    compile 'io.reactivex:rxjava:1.1.1' 
    compile 'com.google.android.gms:play-services-ads:10.0.1' 
} 

Answer 1

てみてください。また、あなたの更新

-dontwarn android.support.v7.** 
-keep class android.support.v7.** { *; } 
-keep interface android.support.v7.** { *; } 

がしようProGuardはこれを基にして、https://github.com/krschultz/android-proguard-snippetsに準拠しています。/

Answer 2

この

-dontnote retrofit2.Platform

-dontnote retrofit2を試してみてください：あなたが使用しているライブラリが含まれる必要がある特定のProGuardのルールを持っていない場合は、一般的に、あなたは確認する必要があります.Platform $ IOS $ MainThreadExecutor

-dontwarn retrofit2.Platform $ Java8

-keepattributes署名

仮想メソッドのJavaを起動しようとしています。の

-keepattributes例外