Android Training (ScrollView , Horizontal ScrollView WebView)
By Khaled Anaqwa
Layout container for a view hierarchy that can be
scrolled by the user,Allowing it to be larger than
the physical display.
A ScrollView is a FrameLayout, meaning you should
place one child in it containing the entire contents
to scroll; this child may itself be a layout manager
with a complex hierarchy of objects.
A child that is often used is a LinearLayout in a
vertical orientation, presenting a vertical array of
top-level items that the user can scroll through.
should never use a ScrollView with a
ListView,because ListView takes care of its
own vertical scrolling.
Most importantly, doing this defeats all of
the important optimizations in ListView for
dealing with large lists, since it effectively
forces the ListView to display its entire list
of items to fill up the infinite container
supplied by ScrollView.
only supports vertical scrolling.
For horizontal scrolling, use
A View that displays web pages.
This class is the basis upon which you can roll
your own web browser or simply display some
online content within your Activity.
It uses the WebKit rendering engine to display
you must add the INTERNET permissions to your
Android Manifest file:
// OR, you can also load from an HTML string:
String summary = "<html><body>You scored
webview.loadData(summary, "text/html", null);
By default, a WebView provides no browserlike widgets.
errors are ignored.
If your goal is only to display some HTML as a
part of your UI, this is probably fine.
If you actually want a full-blown web
browser, then you probably want to invoke
the Browser application with a URL Intent
rather than show it with a WebView.
Uri uri = Uri.parse("http://www.google.com");
Intent intent = new
Building Web Apps in
common scenario in which using
WebView is helpful is when you want to
provide information in your application
that you might need to update, such as
an end-user agreement or a user guide.
Within your Android application, you can
create an Activity that contains a
WebView, then use that to display your
document that's hosted online.