How can i specify the resource to get from R.res.drawable dynamically?

If you want to get any resource Path then there are two ways :

1. Using Resource Name

   Syntax : android.resource://[package]/[res type]/[res name]

   Example : If icon.png image file is available in res/drawable folder you can get path like :

   String PATH="android.resource://com.my.package/drawable/icon";

2. Using Resource Id

   Syntax : android.resource://[package]/[resource_id]

   Example : If icon.png image file is available in res/drawable folder you can get path:

   String PATH="android.resource://com.my.package/" + R.drawable.icon;

This were the examples to get the URI of any image file stored in drawable folder.

Similarly you can get URIs of res/raw folder also.