Security programming Android APK packaging code obfuscation (code example)

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Release: 2018-10-17 14:18:05
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This article brings you content about Android APK packaging code obfuscation (code examples) for secure programming. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Step 1: Configure custom obfuscation rules in the proguard-rules.pro file in the project directory

#注意:
#1.引用外部的jar包 如果不是自己写的最好不混淆它们,因为外部jar包有可能已经混淆过
#2.不要混淆XML布局中使用的自定义控件类,混淆后加载布局会报找不到该控件错误
#3.不要混淆Manifests中配置的组件类,混淆后系统会找因不到该组件而报错
#------------------------------------------------------------------
#指定代码的压缩级别
-optimizationpasses 5
#表示混淆时不使用大小写混合类名,混淆后的类名为小写
-dontusemixedcaseclassnames
#表示不进行优化,建议使用此选项,因为根据proguard-android-optimize.txt中的描述,优化可能会造成一些潜在风险,不能保证在所有版本的Dalvik上都正常运行。
-dontoptimize
# 混淆时输出日志
-verbose
#混淆时所采用的算法,一般不改变,用谷歌推荐算即可
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
#不混淆这些类的子类 不需要混淆系统组件等
-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.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
#表示不混淆任何包含native方法的类的类名以及native方法名
-keepclasseswithmembernames class * {
    native <methods>;
}
#表示不混淆任何一个View中的setXxx()和getXxx()方法,因为属性动画需要有相应的setter和getter的方法实现,混淆了就无法工作了。
-keepclassmembers public class * extends android.view.View {
   void set*(***);
   *** get*();
}
#表示不混淆Activity中参数是View的方法,因为有这样一种用法,在XML中配置android:onClick=”buttonClick”属性,当用户点击该按钮时就会调用Activity中的buttonClick(View view)方法,如果这个方法被混淆的话就找不到了。
-keepclassmembers class * extends android.app.Activity {
    public void *(android.view.View);
}
#表示不混淆枚举中的values()和valueOf()方法
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}
#表示不混淆Parcelable实现类中的CREATOR字段,毫无疑问,CREATOR字段是绝对不能改变的,包括大小写都不能变,不然整个Parcelable工作机制都会失败。
-keepclassmembers class * implements android.os.Parcelable {
    public static final android.os.Parcelable$Creator CREATOR;
}
#表示不混淆R文件中的所有静态字段,我们都知道R文件是通过字段来记录每个资源的id的,字段名要是被混淆了,id也就找不着了。
-keepclassmembers class **.R$* {
    public static <fields>;
}
#保持自定义控件类不被混淆
-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}
#保持自定义控件类不被混淆
-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}
#过滤掉自己编写的实体类以及自定义控件类
-keep class com.beacon.supertool.bean.**{*;}
-keep class com.beacon.supertool.widget.**{*;}

#不需要混淆第三方类库
-dontwarn android.support.v4.**                #去掉警告
-keep class android.support.v4.** { *; }        #过滤android.support.v4
-keep interface android.support.v4.app.** { *; }
-keep public class * extends android.support.v4.**
-keep public class * extends android.app.Fragment
#不需要混淆butterknife
-dontwarn butterknife.**
-keep class butterknife.** { *;}
#不需要混淆gson
-dontwarn com.google.**
-keep class com.google.gson.** {*;}
#不需要混淆glide
-dontwarn com.bumptech.glide.**
-keep class com.bumptech.glide.** {*;}
#不需要混淆okhttp3 okio
-dontwarn okhttp3.**
-keep class okhttp3.** {*;}
-dontwarn okio.**
-keep class okio.** {*;}

#不需要混淆第三方库库或jar......
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Step 2: Configure the build.gradle file in the project directory Medium modification

   buildTypes {
//      debug版本的配置
        debug {
            versionNameSuffix "-debug"
            minifyEnabled false
            zipAlignEnabled false
            shrinkResources false
            signingConfig signingConfigs.debug
        }
//      release版本的配置
        release {
            // 不显示Log
            buildConfigField "boolean", "LOG_DEBUG", "false"
            //混淆
            minifyEnabled true
            //Zipalign优化
            zipAlignEnabled true
            // 移除无用的resource文件
            shrinkResources true
            proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
        }
    }
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