There are essentially two ways to deliver an application on Android: as a client-side application (developed using the Android SDK and installed on user devices as an
.apk) or as a web application (developed using web standards and accessed through a web browser—there's nothing to install on user devices).
The approach you choose for your application could depend on several factors, but Android makes the decision to develop a web application easier by providing:
Thus, your decision to develop a web application for Android can exclude consideration for screen support, because it's already easy to make your web pages look good on all types of screens powered by Android.
Another great feature of Android is that you don't have to build your application purely on the client or purely on the web. You can mix the two together by developing a client-side Android application that embeds some web pages (using a
Since Android 1.0,
WebView support the same viewport and screen density features.
To develop a web application for Android-powered devices, you should read the following documents: