How to upgrade Android Application
<p>I have developed android application.Current version is : <code>android:versionCode="1"</code> and <code>android:versionName="2.0.3"</code> </p>

<p>Sales Rep is going to use this application.</p>

<p>1 ) When They are in the field/working plac, if there are application upgrade available how we are going indicate to them? </p>

<p>2) Its a private application.They don't like to put in the android market place. So I thought  we create one web application in PHP/other language &amp; using that application user enter their credential/login to go home screen &amp;  in that place I want to take the my android application's version number. (that means need to show current version &amp; new version). Is it possible to do this?</p>

<p>3) My application size is 7MB.So when they upgrade the application its overwriting previous version ? or uninstall application &amp; install it? </p>

<p>4) When we do the application upgrade, apk file will download to the internal storage &amp; upgrade it.after upgradehas been successfully the downloaded apk will remove it?</p>

<p>Thanks in advance...</p>

<p>I am expecting your suggestion.Please help me out from this issue</p>
