android - Proguard causing NoSuchMethodException -

class<?> c = class.forname("co.uk.myapp.dir.targetclass"); method main = c.getdeclaredmethod("main", report_holder.class); 

throws 'java.lang.nosuchmethodexception.main[class co.uk.myapp.classes.report_holder]' error once i've prepared app release using proguard.

i spent hours thinking problem in 'co.uk.myapp.dir.targetclass', commenting out things, re-releasing app, , re-testing. turns out error right @ root, at:

method main = c.getdeclaredmethod("main", report_holder.class); 

i updated proguard-project.txt include:

-dontobfuscate -keeppackagenames 

(i using lint suggested method suggested putting code project.properties , putting config in text file), such as:

proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt 

but adding 2 lines didn't have effect.

so wondering if;

a) should add on top of '-keeppackagenames' etc.

b) proguard.config set correctly; should ${sdk.dir} proper uri sdk

the class targeting this:

public static void main(report_holder args) { .... } 

edit

or because have 2 instances of type of thing, both called 'main' ? called in different activities.

method main = c.getdeclaredmethod("main", report_holder.class); method main = c.getdeclaredmethod("main", otherreport_holder.class); 

and both targets being this:

public static void main(report_holder args) { .... }  public static void main(otherreport_holder args) { .... } 

once know how use proguard, should add option -keepattributes signature . necesary when using generics (collections).

for methods beeing called via reflection, must explictly exclude them obfsucation. use option output obfuscation map file, see if rules had desired effect.