java - Hide implementation of methods in jar using android studio IDE -

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i build jar using android studio , when using jar in demo project, when open class demo project, able see implementation of methods in class looking when open sdkclass(in jar).

public class sdkclass{      public void paymentrequestedfromcreditdebitcard(int i) {         toast.maketext(mcontext, "payment requested:" + i, 1).show();     }      public void paymentcanceledbycustomer() {         toast.maketext(mcontext, "payment cancelled", 1).show();     }      public void paymentfailed(int i) {         toast.maketext(mcontext, "payment failed \n error code:" + i, 1).show();     } }

i want thing 

public class sdkclass{      public void paymentrequestedfromcreditdebitcard(int i) {         /* compiled code */     }      public void paymentcanceledbycustomer() {         /* compiled code */     }      public void paymentfailed(int i) {         /* compiled code */     } }

you can use obfuscator. e.g. proguard. change names of class, variables in way code difficult reverse engineered. can't hide implementation completely. please take @ google documentation. https://developer.android.com/studio/build/shrink-code.html


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