Step 3. Right Click on values folder, Go to New-> Values resource file
Enter filename as strings and choose Language option from Available qualifiers and then choose the language from right side. As I have create strings.xml for all Indian languages.
Step 4. Add following code in hindi(hi) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">हिन्दी</string>
</resources>
Step 5. Add following code in Assamese(as) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">অসমীয়া</string>
</resources>
Step 6. Add following code in Bihari(bh) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">बिहारी</string>
</resources>
Step 7. Add following code in English(en) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">English</string>
</resources>
Step 8. Add following code in Gujarati(gu) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">ગુજરાતી</string>
</resources>
Step 9. Add following code in Kannada(kn) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">ಕನ್ನಡ</string>
</resources>
Step 10. Add following code in Kashmiri(ks) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">कॉशुर</string>
</resources>
Step 11. Add following code in Malayalam(ml) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">മലയാà´³ം</string>
</resources>
Step 12. Add following code in Marathi(mr) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">मराठी</string>
</resources>
Step 13. Add following code in Oriya(or) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">ଓଡ଼ିଆ</string>
</resources>
Step 14. Add following code in Sanskrit(sa) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">संस्कृत</string>
</resources>
Step 15. Add following code in Tamil(ta) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">தமிà®´்</string>
</resources>
Step 16. Add following code in Telgu(te) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">à°¤ెà°²ుà°—ు</string>
</resources>
Step 17. Add following code in Urdu(ur) string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<stringname="app_lang">اُردُÙˆ</string>
</resources>
Step 18. After that add following code to your menu_main.xml. For providing language change access to user.