How to install the android app again and again without install the previous version?
<p>I'm working on an android project, and I have to install it many times to test on virtual device. But at the end of yesterday, I can't re-install the app on the virtual device and this morning I find the solution, just uninstall the app and re-install it. That works for me, but now I have to uninstall and re-install it every time if I want to test.</p>

<p>So is there any solution to make it work like before? Install the app again and again without uninstall it.</p>
