How to protect classes from being removed by MINIFY_ENABLED?

问题

I am using FirebaseFirestore in my project. When i am in debug mode, that is I set the minifyEnabled to FALSE, the app runs just fine, but when I build a signed .apk it doesn't work as I expect, i.e it doesn't load data from firebase Firestore.

I have tried enabling minifyEnabled to true while testing, but that won't actually shrink project unless you're generating a release.

What KEEP statments should i write to exlude FIREBASE FIRESTORE and Glide classes from minifying ?

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'

implementation 'com.google.firebase:firebase-core:16.0.9'
implementation 'com.google.firebase:firebase-firestore:19.0.0'
implementation 'com.google.firebase:firebase-ads:17.2.0'

testImplementation 'junit:junit:4.12'
implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
//glide library
implementation 'com.github.bumptech.glide:glide:4.9.0' }

proguard-rules.pro

# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}

# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable

# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile

my proguard configuration

buildTypes {
        release {
            minifyEnabled true
            shrinkResources false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),


                    'proguard-rules.pro'
        }
    }

proguard-android-optimize.txt-3.4.1

# 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 The files in $ANDROID_HOME are no longer maintained and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 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;
}

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

# 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.**

回答1:

SOLUTION: the ProGuard renames almost every class. And it renamed my model class (pojo), that which i used for encapsulating data for the Firestore, and firestore only recognized that name in my case "Upload".

but when the proguard renamed it, it named the "Upload" class as " j " and, the firestore SDK didn't recognize "j".

that was the problem.

i added "@Keep" annotation with "Upload" class and my problem was solved.

@Keep
public class Upload{
.....
.....
}

来源：https://stackoverflow.com/questions/56951296/how-to-protect-classes-from-being-removed-by-minify-enabled

标签

android

proguard

minify