[英]r8 does not create output dex file
我正在嘗試使用r8
但沒有取得多大成功:
$ wget https://repo1.maven.org/maven2/com/mikepenz/fastadapter/3.2.7/fastadapter-3.2.7.aar
$ wget https://maven.google.com/com/android/support/recyclerview-v7/26.0.1/recyclerview-v7-26.0.1.aar
$ unzip fastadapter-3.2.7.aar && mv classes.jar fastadapter.jar
$ unzip recyclerview-v7-26.0.1.aar && mv classes.jar recycleview.jar
$ echo "-dontwarn java.lang.Object" > proguard.cfg
$ java -jar build/libs/r8.jar --lib android-4.1.1.4.jar --lib recycleview.jar --release --output . --pg-conf proguard.cfg fastadapter.jar
$ dexdump -d classes.dex | grep "insns size" | wc -l
Unable to open 'classes.dex' : No such file or directory
0
但是使用d8
它可以完美運行(即使沒有--lib android.jar
和--lib recycleview.jar
):
$ java -jar ../build/libs/d8.jar --release --output . fastadapter.jar
$ dexdump -d classes.dex | grep "insns size" | wc -l
390
編輯
嘗試創建 fastadapter proguard keep 規則失敗:
$ cmdline-tools/build-tools/30.0.3/aapt2 link --proguard proguard_fastadapter.cfg -o proguard_fastadapter.cfg --manifest AndroidManifest.xml
AndroidManifest.xml:2: error: attribute android:versionCode not found.
AndroidManifest.xml:2: error: attribute android:versionName not found.
AndroidManifest.xml:7: error: attribute android:minSdkVersion not found.
AndroidManifest.xml:7: error: attribute android:targetSdkVersion not found.
error: failed processing manifest.
這有點奇怪,因為 targetSdkVersion 實際上確實存在:
$ grep "targetSdkVersion" AndroidManifest.xml
android:targetSdkVersion="27" />
問題是您傳遞給 R8 的唯一規則是-dontwarn java.lang.Object
。 沒有單一的-keep
規則,這意味着 output 將是空的,因為沒有保留入口點。
缺少的是兩組保持規則:
aapt2
生成。 對於第一組規則,Android Studio(或更准確地說是 AGP)捆綁了這個規則文件,它作為getDefaultProguardFile('proguard-android-optimize.txt')
的結果傳遞給所有構建。
# This is a configuration file for ProGuard.
# http://proguard.sourceforge.net/index.html#manual/usage.html
#
# Starting with version 2.2 of the Android plugin for Gradle, this file is distributed together with
# the plugin and unpacked at build-time. The files in $ANDROID_HOME are no longer maintained and
# will be ignored by new version of the Android plugin for Gradle.
# Optimizations: If you don't want to optimize, use the proguard-android.txt configuration file
# instead of this one, which turns off the optimization flags.
# Adding optimization introduces certain risks, since for example not all optimizations performed by
# ProGuard works on all versions of Dalvik. The following flags turn off various optimizations
# known to have issues, but the list may not be complete or up to date. (The "arithmetic"
# optimization can be used if you are only targeting Android 2.0 or later.) Make sure you test
# thoroughly if you go this route.
-optimizations !code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/*
-optimizationpasses 5
-allowaccessmodification
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose
# Preserve some attributes that may be required for reflection.
-keepattributes *Annotation*,Signature,InnerClasses,EnclosingMethod
-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService
-keep public class com.google.android.vending.licensing.ILicensingService
-dontnote com.android.vending.licensing.ILicensingService
-dontnote com.google.vending.licensing.ILicensingService
-dontnote com.google.android.vending.licensing.ILicensingService
# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
-keepclasseswithmembernames,includedescriptorclasses class * {
native <methods>;
}
# Keep setters in Views so that animations can still work.
-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 ** CREATOR;
}
# Preserve annotated Javascript interface methods.
-keepclassmembers class * {
@android.webkit.JavascriptInterface <methods>;
}
# The support libraries 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.
-dontnote android.support.**
-dontnote androidx.**
-dontwarn android.support.**
-dontwarn androidx.**
# This class is deprecated, but remains for backward compatibility.
-dontwarn android.util.FloatMath
# Understand the @Keep support annotation.
-keep class android.support.annotation.Keep
-keep class androidx.annotation.Keep
-keep @android.support.annotation.Keep class * {*;}
-keep @androidx.annotation.Keep class * {*;}
-keepclasseswithmembers class * {
@android.support.annotation.Keep <methods>;
}
-keepclasseswithmembers class * {
@androidx.annotation.Keep <methods>;
}
-keepclasseswithmembers class * {
@android.support.annotation.Keep <fields>;
}
-keepclasseswithmembers class * {
@androidx.annotation.Keep <fields>;
}
-keepclasseswithmembers class * {
@android.support.annotation.Keep <init>(...);
}
-keepclasseswithmembers class * {
@androidx.annotation.Keep <init>(...);
}
# These classes are duplicated between android.jar and org.apache.http.legacy.jar.
-dontnote org.apache.http.**
-dontnote android.net.http.**
# These classes are duplicated between android.jar and core-lambda-stubs.jar.
-dontnote java.lang.invoke.**
對於第二部分,使用帶有--proguard
選項的aapt2 link
。 這將生成額外的必需規則,例如:
-keep class com.example.app.MainActivity { <init>(); }
兩組規則都必須與附加的應用程序特定規則一起傳遞給 R8(它可能需要幾個--pg-conf
選項)。
當使用 Android Studio(更准確地說是 AGP)時,這是自動處理的。 作為參考,可以在app/build/intermediates/proguard-files
中檢查這些規則。 有關更多詳細信息,請參閱縮小、混淆和優化您的應用程序。
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