Develop Reference

How to Obfuscated Jar or AAR files

Can someone help me about, obfuscated or give me example to do this?
I created an .aar file and .jar file and put the class of getter and setter that will give value if they access on it.
but the thing in need to put the hidden values that someone will not see what is the value on it.
package com.example.test;
public class MyClass extends privateClass{
String testing;
public MyClass() {
this.testing = getStringExample();
}
public String getTesting() {
return testing;
}
public void setTesting(String testing) {
this.testing = testing;
}
}
and this class must be hide/obfuscated to the other developers if i give my library
package com.example.test;
public class privateClass {
String getStringExample()
{
return "TEST RESULT";
}
}
Note: I tried to put proguard too, and check the library but still they can see my private class, , i tried to use interface and extends the class but still the same,
here is my proguard example:
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontwarn ccom.example.test.R*
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class
-keepclassmembers class com.example.test.** { *; }
-keep class com.example.eyefixdata.** {
void set*(***);
void set*(int, ***);
boolean is*();
boolean is*(int);
*** get*();
*** get*(int);
}
Please save my day. hope you help me.
Thanks in advance.

You can move your private classes/interfaces to other packages, e.g. put your privateClass to an internal package package com.example.your.library.internal; to distinguish with your public classes/interfaces.
package com.example.your.library.internal;
public class privateClass {
String getStringExample()
{
return "TEST RESULT";
}
}
And add below line to your proguard configuration
-keep public class com.example.your.library.* { public *; }
Note that you should use single wild char * to NOT obfuscate the internal packages.

Proguard rules to keep public static method name unchanged in AAR library

How to keep static method name unchanged and obfuscate everything inside the method.
Example code:
public class MyClass {
public static void MyFunc(Conetext context, String str, int i) {
Toast.makeText(context, "Hello world "+ str + i, Toast.LENGTH_SHORT).show();
}
}
Here I want to keep MyFunc unchanged.
Amit Vaghela why are you doing this? If you don't understand what I asked please ignore my post.
Do you think -keepclassmembernames will obfuscate entire code inside the MyFunc? I tested:
-optimizationpasses 5
-keep,allowobfuscation class *
-keepclassmembers class * {
public static void * (...);
}
And it didn't work and that's why I am here to ask. If you cannot help you better ignore it.

How to not obfuscate interface methods & its parameters using Proguard in Android?

I have the following code:
public class MyClass {
public void method1(Integer marks) {
}
private String method3(String name){
}
public interface interface1 {
void method4(Integer ID);
void method5(Integer rate, boolean status);
}
}
I have used progaurd-rules.pro
-keepattributes Exceptions,InnerClasses,Signature,Deprecated,SourceFile,LineNumberTable,*Annotation*,EnclosingMethod
-keepparameternames
-keep public class *
-keepclassmembers public class *{
public *;
}
-keep public interface packageName.MyClass$interface1 { *; }
Obfuscated code as below:
public class MyClass {
public void method1(Integer marks) {
}
private String a(String var1){
}
public interface interface1 {
void method4(Integer var1);
void method5(Integer var1, boolean var2);
}
}
I want the interface methods variables (ID, rate & status) not to obfuscate. i.e as below
public interface interface1 {
void method4(Integer ID);
void method5(Integer rate, boolean status);
}
How can it be possible?

You could keep method's arguments by adding extra flags to -keepattributes. They look like this:
-keepattributes LocalVariableTable,LocalVariableTypeTable
Unfortunately, this keeps arguments from obfuscation not only in the interface you want, but in the entire project. Maybe that's fine for you.
If you're using a default proguard configuration shipped along with Android SDK then you could also use a special annotation to prevent some classes from obfuscation. Check it out.

public interface SSOListener {
void sendDataToAnalytics(String event, JSONArray object);
}
// In my case JsonArray was obfuscated.
Solution :
-keep class org.json.JSONArray**, ** {
protected <fields>;
public <fields>;
<methods>;
}

-keepattributes LocalVariableTable,LocalVariableTypeTable
The above keepattributes didn't work for me. However -keepparameternames did. I added this to the internal Proguard config that our Android Library uses. The other non keot classes still have their params obfuscated.
Note: I'm using R8 to actually obfuscate which is the default when using the Android Gradle Plugin since 3.4.0 also we are enforcing source and target compatibility to 1.8 (due to unrelated okhttp dependency)

ProGuard uses the naming convention of Java bytecode, as seen in class file names and stacktraces. Therefore:
-keep public interface com.somepackage.SomeClass$someInterface {*;}
In case if your interface is not public.
-keep interface com.somepackage.SomeClass$someInterface {*;}.

Proguard setting to not remove unused method

Conside the following code structure for android:
package blah;
class A{
class B{
public void foo(String s){
}
}
}
How can I tell proguard to not remove or obfuscate foo.
foo is unused function in code at compile time but is run at run-time from another code.
I have tried:
-keep class blah.A.B;
-keepclassmembers class blah.A.B {
public void foo(String s);
}
etc. but nothing stops Proguard from removing that function.
I do not want proguard to change name of 'foo'. Proguard may change the name of class A or class B but not the function name 'foo'.
Any suggestions?

Almost right. In java bytecode, the $ character separates the names of inner classes and their outer classes (to avoid ambiguities with package names). So, to keep just the method:
-keepclassmembers class blah.A$B {
public void foo(java.lang.String);
}

I have a method 'myClickHandler' referenced only in an xml file.
This
-keepclassmembers class * extends android.app.Activity {
public void myClickHandler(android.view.View );
}
stops it being removed in my application. Perhaps the extends .. will work for you

How to keep my test methods with proguard.cfg

For my Android instrumentation test I need a few extra entry point into my classes. Those methods are not used in the actual application. My idea was to start them all with test_ and have a general rule to exclude them from being optimized away. This is how far I got:
-keepclassmembers class com.xxx.**.* {
public ** test_* ();
public ** test_* (**);
public static ** test_* ();
public static ** test_* (**);
}
But it still does not work. public static void test_destroy (final android.content.Context context) and private void dropTables (final SQLiteDatabase db) has just been removed from the code. And I have no idea why.
How is it properly used for wildcard patterns?

The solution is
-keepclassmembers class com.XXX.**.* {
*** test_* (...);
}

Another way to do this is to use an annotation (i.e. guava's #VisibleForTesting) to mark those methods. Then in proguard you can keep all entry points and members with that annotation:
-keep #com.google.common.annotations.VisibleForTesting class *
-keepclasseswithmembers class * {
#com.google.common.annotations.VisibleForTesting *;
}