Android implementation code obfuscation and android code obfuscation

Android implementation code obfuscation and android code obfuscation

For signed apk, you can still view the Code Implementation of the class file after decompilation. for decompilation, you can view your blog and click the open link.

This conventional decompilation fails when code obfuscation is used.

1, added in build. grandle, where rules are written in the proguard-rules.pro, you can also customize a file, replace it, such as eclipse commonly used proguard-project.txt

buildTypes {    release {        signingConfig signingConfigs.release        minifyEnabled true        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'    }}

2, add the following code in the proguard-rules.pro, basically covering all

-Optimizationpasses 5 # specify the compression level of the code-dontusemixedcaseclassnames # whether to use case-insensitive mixture-dontpreverify # Whether to perform pre-check-verbose # Whether to record logs during obfuscation-dontwarn com. umeng. ** # Keep com. umeng. ** all classes in this package are not confused with all methods. (Delete this sentence if you do not have umeng integration.)-optimizations! Code/simplification/arithmetic ,! Field /*,! Class/merging/* # algorithm used for obfuscation-keep public class * extends android. app. activity # keep classes that are not Obfuscated-keep public class * extends android. app. application # keep classes that are not Obfuscated-keep public class * extends android. app. service # Do not confuse classes-keep public class * extends android. content. broadcastReceiver # keep classes that are not Obfuscated-keep public class * extends android. content. contentProvider # Do not confuse classes-keep public class * extends android. app. backup. backupAgentHelper # keep classes that are not Obfuscated-keep public class * extends android. preference. preference # keep classes that are not Obfuscated-keep public class com. android. vending. licensing. ILicensingService # Keep classes not Obfuscated-keepclasseswithmembernames class * {# Keep native METHOD not obfuscated native <methods> ;} -keepclasseswithmembers class * {# Keep the custom control class not obfuscated with public <init> (android. content. context, android. util. attributeSet);}-keepclasseswithmembers class *{
# Keep the custom control class public <init> (android. content. Context, android. util. AttributeSet, int );
}-Keepclassmembers class * extends android. app. activity {# Keep the custom control class from being confused with public void * (android. view. view);}-keepclassmembers enum * {# Keep The enum class from being confused public static ** [] values (); public static ** valueOf (java. lang. string);}-keep class * implements android. OS. parcelable {# Keep Parcelable not to be confused public static final android. OS. parcelable $ Creator *;}

3. When obfuscation code is implemented through Android Studio, the jar files in the lib directory have been added to the packaging script by default. Therefore, you do not need to manually add the jar files again. Otherwise, "java. io. IOException: The same input jar is specified twice "error.

4. decompile the signed apk and view the code. The following figure shows the obfuscation and obfuscation process.

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