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I think you need my knowledge for make this tool working properly and easily as you don't know that's no needed place the toast code method into a main dex to main activity, that's why you need to add new codes to your tool for make it working fine with every apk, with static method (customized by me) rather than virtual one you can make your own dex with inside just the toast code called from main activity, so conclusion... with custom toast method you just need to place the call to toast to main activity and the code will be placed into apk as additional dex such "classes2.dex", in this way you're not breaking oncreate method with toast code and so compatibility will be 99%, if you need more info and customized code for update your tool just pm me.
