title: Permission dialog is not showing in version 5.0
body: <p><code>android permission dialog</code> is not showing in <code>lollipop version I.e 5.1</code>, but <code>permission dialog</code> is showing in version 6.0 ie <code>marshmallow</code>. Can any one tell me what is the reason behind this, and how to solve this problem.</p>