我知道如何使用延迟绑定为不同的用户代理编译GWT应用程序,但这似乎没有提供在桌面+移动浏览器之间进行distingiush的方法。
除了制作基于gwt-mobile-webkit的新应用之外,您如何将现有的GWT应用转换为重新设计的移动界面?
答案 0 :(得分:3)
如果您使用描述here的MVP模式,您可以根据用户代理切换视图的实现。
您可以拥有ClientFactoryImpl和ClientFactoryMobileImpl。然后使用GWT.create(ClientFactory.class)创建定义到.gwt.xml文件中的实现。
以下是.gwt.xml文件的示例
<replace-with class="com.bell.cts.e911.ers.web.client.ClientFactoryImpl">
<when-type-is class="com.bell.cts.e911.ers.web.client.ClientFactory" />
<when-property-is name="user.agent" value="ie6" />
</replace-with>
<replace-with class="com.bell.cts.e911.ers.web.client.ClientFactoryMobileImpl">
<when-type-is class="com.bell.cts.e911.ers.web.client.ClientFactory" />
<when-property-is name="user.agent" value="mobilesafari" />
</replace-with>
您始终可以使用此处描述的技术设置user.agents:http://code.google.com/p/google-web-toolkit/wiki/ConditionalProperties
答案 1 :(得分:2)
您可以从GWT看到此示例应用程序: http://code.google.com/p/google-web-toolkit/source/browse/trunk/samples/mobilewebapp/src/com/google/gwt/sample/mobilewebapp/?r=10041 它在'FormFactor.gwt.xml'模块中检测形状因子,可能如下所示:
<?xml version="1.0" encoding="UTF-8"?>
<!-- Defines the formfactor property and its provider function. -->
<module>
<!-- Determine if we are in a mobile browser. -->
<define-property name="formfactor" values="desktop,tablet,mobile"/>
<property-provider name="formfactor">
<![CDATA[
// Look for the formfactor as a url argument.
var args = location.search;
var start = args.indexOf("formfactor");
if (start >= 0) {
var value = args.substring(start);
var begin = value.indexOf("=") + 1;
var end = value.indexOf("&");
if (end == -1) {
end = value.length;
}
return value.substring(begin, end);
}
// Detect form factor from user agent.
var ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("iphone") != -1 || ua.indexOf("ipod") != -1) {
// iphone and ipod.
return "mobile";
} else if (ua.indexOf("ipad") != -1) {
// ipad.
return "tablet";
} else if (ua.indexOf("android") != -1 || ua.indexOf("mobile") != -1) {
/*
* Android - determine the form factor of android devices based on the diagonal screen
* size. Anything under six inches is a phone, anything over six inches is a tablet.
*/
var dpi = 160;
var width = $wnd.screen.width / dpi;
var height = $wnd.screen.height / dpi;
var size = Math.sqrt(width*width + height*height);
return (size < 6) ? "mobile" : "tablet";
}
// Everything else is a desktop.
return "desktop";
]]>
</property-provider>
</module>