的WebView跳使用loadDataWithBaseUrl锚WebView、loadDataWithBaseUrl
我的Android应用程序使用的WebView显示一串HTML code，我产生'飞'。在HTML code使用下面的code加载：
StringBuilder的建设者=新的StringBuilder（）;
// HTML
builder.append（＆LT; HTML＆GT;＆LT; HEAD＆GT;＆LT;链接相对= \样式\的href = \文件：///android_asset/style.css \型= \文/ CSS \＆GT; ）;
builder.append（＆LT; /链接＆GT;＆LT; /头＆GT;＆LT;身体GT;）;
builder.append（getThreadBody（））;
builder.append（＆LT; /身体GT;＆LT; / HTML＆gt;中）;
webview.loadDataWithBaseURL（文件：/// android_asset /，builder.toString（），text / html的，UTF-8，NULL）;
这所有的作品真的很好。请注意，我不加载实际的HTML文件，我只是创建重新presents一些（希望有效）的字符串的HTML并将其加载web视图。
不管怎么样，我的HTML生成（部分在'getThreadBody'方法）包含名为锚，例如像这样;
＆LT; DIV＆GT;
＆其中;一个名字=949823＆GT;锚1所述; / a取代;
＆LT; DIV＆GT;各种材料＆LT; / DIV＆GT;
＆其中;一个名字=895984＆GT;锚2'; / a取代;
＆LT; DIV＆GT; ...＆LT; / DIV＆GT;
＆LT; / DIV＆GT;
现在在某些情况下，我想web视图导航到这些锚的一个，只要我加载HTML。据我了解的WebView支持导航（滚动在这种情况下）来命名锚，但美中不足的是，没有人点击这些锚的任何链接，我希望它被加载时的WebView滚动（它是，如果没有问题的存在为加载HTML和滚动之间的一个短暂的延迟，我的观点是，它不应该要求用户交互）。
我相信行为可以通过web视图的使用loadURL方法并提供与到位的锚，如：
一个URL来实现 webview.loadUrl（文件：///android_asset/page.html#895984，...）
不过，由于我没有保存的HTML的任何文件，我不能用这个方法......当然保存HTML临时文件可能是一个解决方案，但我想保留，作为最后的手段，出现必须有一个更简单的方法？
我怎样才能做到这一点？谢谢！
解决 这里的code，它的工作原理。我发现了一个很短的延迟被要求让页面加载执行JavaScript的面前，否则它是一种50/50是否工作或不...
StringBuilder的建设者=新的StringBuilder（）;
// HTML
builder.append（＆LT; HTML＆GT;＆LT; HEAD＆GT;＆LT;链接相对= \样式\的href = \文件：///android_asset/style.css \型= \文/ CSS \＆GT; ）;
builder.append（＆LT; /链接＆GT;）;
builder.append（＆其中;脚本＆gt;中）;
builder.append（功能scrollAnchor（ID）{）;
builder.append（window.location.hash = ID;}）;
builder.append（＆所述; /脚本＆gt;中）;
builder.append（＆LT; /头＆GT;＆LT;身体GT;）;
builder.append（getThreadBody（））;
builder.append（＆LT; /身体GT;＆LT; / HTML＆gt;中）;
webContents.loadDataWithBaseURL（文件：/// android_asset /，builder.toString（），text / html的，UTF-8，NULL）;
定时器定时=新的Timer（）;
timer.schedule（新的TimerTask（）{
@覆盖
公共无效的run（）{
字符串ID =895884;
webContents.loadUrl（JavaScript的：scrollAnchor（+编号+）;）;
}
}
}，250）;
解决方案
如何用JavaScript的控制呢？我没有尝试，但也许这是一个线索。
builder.append（getThreadBody（））;
builder.append（＆其中;脚本＆GT; window.location.hash =949823;＆所述; /脚本＆gt;中）;
builder.append（＆LT; /身体GT;＆LT; / HTML＆gt;中）;
记住启用JavaScript的web视图。
----其他答案----
我看到你使用的TimerTask加载JavaScript的，这工作，但我认为还有另一种更好的办法。的WebView有一个回调名为onPageFinished，这将是触发时的WebView完成加载网页。你可以注入你的JS那里。
webContents.setWebViewClient（新WebViewClient（）{
@覆盖
公共无效onPageFinished（web视图查看，字符串URL）{
字符串ID =895884;
webContents.loadUrl（JavaScript的：scrollAnchor（+编号+）;）;
}
}）;
希望这是有用的！
My Android app uses a WebView to display a bunch of HTML code that I generate 'on the fly'. The HTML code is loaded using the following code:
StringBuilder builder = new StringBuilder();
// HTML
builder.append("<html><head><link rel=\"stylesheet\" href=\"file:///android_asset/style.css\" type=\"text/css\">");
builder.append("</link></head><body>");
builder.append(getThreadBody());
builder.append("</body></html>");
webview.loadDataWithBaseURL("file:///android_asset/", builder.toString(), "text/html", "utf-8", null);
This all works really nice. Note that I'm not loading an actual HTML file, I'm merely creating a string that represents some (hopefully valid) HTML and load it in the WebView.
Anyway, the HTML I generate (the part in the 'getThreadBody' method) contains named anchors, for example like this;
<div>
<a name="949823">Anchor 1</a>
<div>All kinds of stuff</div>
<a name="895984">Anchor 2</a>
<div>...</div>
</div>
Now in some cases I want the WebView to navigate to one of those anchors as soon as I load the HTML. As far as I understand the WebView supports navigating (scrolling in this case) to named anchors, but the catch is that nobody is clicking any hyperlinks to those anchors, I want the WebView to scroll when it is loaded (it is no problem if there is a short delay between loading the HTML and scrolling, my point is that it should not require user interaction).
I believe the behavior can be achieved by using the WebView's loadUrl method and supplying a URL with the anchor in place, eg
webview.loadUrl("file:///android_asset/page.html#895984", ...)
However, since I am not saving the HTML to any file I cannot use this method... Of course saving the HTML to a temporary file may be a solution but I'd like to keep that as a last resort, there must be a simpler way?
How can I achieve this? Thanks!
Resolved Here's the code that works. I found a short delay was required to let the page load before executing the javascript otherwise it was kind of 50/50 whether it worked or not...
StringBuilder builder = new StringBuilder();
// HTML
builder.append("<html><head><link rel=\"stylesheet\" href=\"file:///android_asset/style.css\" type=\"text/css\">");
builder.append("</link>");
builder.append("<script>");
builder.append("function scrollAnchor(id) {");
builder.append("window.location.hash = id;}");
builder.append("</script>");
builder.append("</head><body>");
builder.append(getThreadBody());
builder.append("</body></html>");
webContents.loadDataWithBaseURL("file:///android_asset/", builder.toString(), "text/html", "utf-8", null);
Timer timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
String id = "895884";
webContents.loadUrl("javascript:scrollAnchor(" + id + ");");
}
}
}, 250);
解决方案
How about control it by JavaScript? I didn't try it but maybe this is a clue.
builder.append(getThreadBody());
builder.append("<script>window.location.hash="949823";</script>");
builder.append("</body></html>");
Remember enable javascript for WebView.
----Additional Answer----
I saw that you use TimerTask to load the javascript, That works but I think there is another better way. WebView have a callback named onPageFinished and it will be trigger when WebView finish loading webpage. You could inject your JS there.
webContents.setWebViewClient(new WebViewClient(){
@Override
public void onPageFinished(WebView view, String url) {
String id = "895884";
webContents.loadUrl("javascript:scrollAnchor(" + id + ");");
}
});
Hope this is useful!
