Q: How to prevent websites header and footer in android app I have a website which is built using WordPress, now I want to make an android app which will use this website. I want the header/footer to be dynamic as follows:
User access     | header displayed?
app             | no
android browser | yes

Any idea or suggestions how to do it? Is there any WordPress, android or JavaScript plugin which I can use?

A: Set a User-Agent on your web view in your Android app and then check the User-Agent in your WordPress templates to decide what to show/hide. 
For instance, include sitename-native-app in your User-Agent. This explains how to set your User-Agent in Android: android user agent
On the WordPress side, create a function to check the User Agent. Example:
function is_native_app() {
    return ( false !== strpos( strtolower( $_SERVER['HTTP_USER_AGENT'] ), 'sitename-native-app' ) );
}

Then, in your template where you include your header and footer, wrap with: 
if ( ! is_native_app() ) { ... }
