android - How to install two versions of an app -

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is there simple way have installed 2 version of app on same android phone?

im updating old web app native android app. testing purpose great if have both installed @ same time on same device.

it great rename update temporary.

if rename package name in androidmanifest, r renamed , have reorganize imports etc.

is possible simple rename somewhere in androidmanifest without changing single line of code (even not eclipse / android studio refactoring mechanism).

i have tried mark native app library project , include in new android project package name. trouble approach, instance actionbar sherlock: 

unable execute dex: multiple dex files define lcom/actionbarsherlock/r$attr; conversion dalvik format failed: unable execute dex: multiple dex files define lcom/actionbarsherlock/r$attr;

if using new gradle build system create new build type , add packagenamesuffixto it. add suffix package name else stays same.

buildtypes {     debug {         packagenamesuffix ".debug"     } }

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