如何保护类不被 MINIFY_ENABLED 删除？

Question

我在我的项目中使用 FirebaseFirestore。当我处于调试模式时，minifyEnabled FALSE，应用程序运行得很好，但是当我构建一个签名的 .apk，minifyEnabled TRUE 时，它不能像我预期的那样工作。即它不会从 firebase Firestore 加载数据。

我应该写什么 KEEP 语句来排除 FIREBASE FIRESTORE 和 Glide 类的缩小？

dependencies {
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'

}

我的 proguard 配置

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


                    'proguard-rules.pro'
        }
    }

proguard-android-optimize.txt-3.4.1

 -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.**

Answer 1

解决方案： ProGuard 几乎重命名了每个类。它重命名了我用于封装 Firestore 数据的模型类 (pojo)，而 Firestore 仅识别该名称，在我的情况下为“上传”。

但是当proguard重命名它时，它将“上传”类命名为“j” 而且，firestore SDK 无法识别“j”。

这就是问题所在。

我添加了 带有“上传”类的“@Keep”注释，我的问题就解决了。

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