Enable zoom for all pages of an android application

i have created an android app using phone-gap[Android].

Here i am able to zoom my first .html page of application, but when ever i moving/redirecting to a page by clicking the anchortag/button of my first .html page there i am unable to zoom the second .html page

i have added below things in my .java

WebSettings settings = appView.getSettings();
settings.setBuiltInZoomControls(true);
settings.setSupportZoom(true);
settings.setDefaultZoom(ZoomDensity.FAR);

and i have also added the following in all my .html pages.

<meta name="viewport" content="user-scalable=yes, width=device-width, initial-scale=1,minimum-scale=1, maximum-scale=6, target-densityDpi=device-dpi" />
<meta http-equiv="Content-type" content="text/html; charset=utf-8">

so here my question is: how to enable the zooming effect

any help will be appriciated.......

Tags: HTML, Mobile Apps (Android), UI