![[求助] python 如何爬取 网页上调用JS函数打开的视频链接](/aiimages/%5B%E6%B1%82%E5%8A%A9%5D+python+%E5%A6%82%E4%BD%95%E7%88%AC%E5%8F%96+%E7%BD%91%E9%A1%B5%E4%B8%8A%E8%B0%83%E7%94%A8JS%E5%87%BD%E6%95%B0%E6%89%93%E5%BC%80%E7%9A%84%E8%A7%86%E9%A2%91%E9%93%BE%E6%8E%A5.png)
思路：
1、js调用android的java代码
2、通过java代码访问通讯录
3、通过java代码访问js代码返回通讯录信息
代码：
1、js调用android的java代码
js代码：
window.ncp.callOnJs2("click")android代码，通过webview打开页面：
mWebview.getSettings().setJavaScriptEnabled(true)mWebView.addJavascriptInterface(new JavaScriptInterface(), "ncp")
final class JavaScriptInterface {
public int callOnJs() {
return 1000
}
public void callOnJs2(String mode) {
//TODO
}
}
2、通过java代码访问通讯录
/**得到手机通讯录联系人信息**/private void getPhoneContacts() {
ContentResolver resolver = mContext.getContentResolver()
// 获取手机联系人
Cursor phoneCursor = resolver.query(Phone.CONTENT_URI,PHONES_PROJECTION, null, null, null)
if (phoneCursor != null) {
while (phoneCursor.moveToNext()) {
//得到手机号码
String phoneNumber = phoneCursor.getString(PHONES_NUMBER_INDEX)
//当手机号码为空的或者为空字段 跳过当前循环
if (TextUtils.isEmpty(phoneNumber))
continue
//得到联系人名称
String contactName = phoneCursor.getString(PHONES_DISPLAY_NAME_INDEX)
//得到联系人ID
Long contactid = phoneCursor.getLong(PHONES_CONTACT_ID_INDEX)
//得到联系人头像ID
Long photoid = phoneCursor.getLong(PHONES_PHOTO_ID_INDEX)
//得到联系人头像Bitamp
Bitmap contactPhoto = null
//photoid 大于0 表示联系人有头像 如果没有给此人设置头像则给他一个默认的
if(photoid > 0 ) {
Uri uri =ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI,contactid)
InputStream input = ContactsContract.Contacts.openContactPhotoInputStream(resolver, uri)
contactPhoto = BitmapFactory.decodeStream(input)
}else {
contactPhoto = BitmapFactory.decodeResource(getResources(), R.drawable.contact_photo)
}
mContactsName.add(contactName)
mContactsNumber.add(phoneNumber)
mContactsPhonto.add(contactPhoto)
}
phoneCursor.close()
}
3、通过java代码访问js代码返回通讯录信息
mWebView.loadUrl("javascript:onSaveCallback()")这个要模拟得好的话必须得结合js才行的，光是那排字母就不光是点击，应该要支持手指在上面精确的滑动到某个字母范围，这个一时半会写不出来。你可以去网上找个常见的JQ滚屏插件来改动下自己琢磨。
简单的办法，ABCD..XYZ做成锚链接，加个js平滑滚动，样式你自己想办法完善，把A-Z那排链接display: block后设置成正方形方块，加个ul>li套上用定位放到左上角即可：
<!DOCTYPE html><html>
<body>
<style type="text/css">
h2:target{
background:#00C}
}
</style>
<body>
<a href="#L">L</a>
<a href="#W">W</a>
<p style="height:500px">占位区</p>
<h2 id="L">L开头的电话</h2>
<p>李四</p>
<p>黎明</p>
<p style="height:500px">占位区</p>
<h2 id="W">W开头的电话</h2>
<p>王波</p>
<p>网名</p>
</body>
</html>
<script>
/* Smooth scrolling(平滑滚动到锚链接)
Changes links that link to other parts of this page to scroll
smoothly to those links rather than jump to them directly, which
can be a little disorienting.
sil, http://www.kryogenix.org/
v1.0 2003-11-11
v1.1 2005-06-16 wrap it up in an object
*/
var ss = {
fixAllLinks: function() {
// Get a list of all links in the page
var allLinks = document.getElementsByTagName('a')
// Walk through the list
for (var i=0i<allLinks.lengthi++) {
var lnk = allLinks[i]
if ((lnk.href && lnk.href.indexOf('#') != -1) &&
( (lnk.pathname == location.pathname) ||
('/'+lnk.pathname == location.pathname) ) &&
(lnk.search == location.search)) {
// If the link is internal to the page (begins in #)
// then attach the smoothScroll function as an onclick
// event handler
ss.addEvent(lnk,'click',ss.smoothScroll)
}
}
},
smoothScroll: function(e) {
// This is an event handler get the clicked on element,
// in a cross-browser fashion
if (window.event) {
target = window.event.srcElement
} else if (e) {
target = e.target
} else return
// Make sure that the target is an element, not a text node
// within an element
if (target.nodeName.toLowerCase() != 'a') {
target = target.parentNode
}
// Paranoia check this is an A tag
if (target.nodeName.toLowerCase() != 'a') return
// Find the <a name> tag corresponding to this href
// First strip off the hash (first character)
anchor = target.hash.substr(1)
// Now loop all A tags until we find one with that name
var allLinks = document.getElementsByTagName('a')
var destinationLink = null
for (var i=0i<allLinks.lengthi++) {
var lnk = allLinks[i]
if (lnk.name && (lnk.name == anchor)) {
destinationLink = lnk
break
}
}
if (!destinationLink) destinationLink = document.getElementById(anchor)
// If we didn't find a destination, give up and let the browser do
// its thing
if (!destinationLink) return true
// Find the destination's position
var destx = destinationLink.offsetLeft
var desty = destinationLink.offsetTop
var thisNode = destinationLink
while (thisNode.offsetParent &&
(thisNode.offsetParent != document.body)) {
thisNode = thisNode.offsetParent
destx += thisNode.offsetLeft
desty += thisNode.offsetTop
}
// Stop any current scrolling
clearInterval(ss.INTERVAL)
cypos = ss.getCurrentYPos()
ss_stepsize = parseInt((desty-cypos)/ss.STEPS)
ss.INTERVAL =
setInterval('ss.scrollWindow('+ss_stepsize+','+desty+',"'+anchor+'")',10)
// And stop the actual click happening
if (window.event) {
window.event.cancelBubble = true
window.event.returnValue = false
}
if (e && e.preventDefault && e.stopPropagation) {
e.preventDefault()
e.stopPropagation()
}
},
scrollWindow: function(scramount,dest,anchor) {
wascypos = ss.getCurrentYPos()
isAbove = (wascypos < dest)
window.scrollTo(0,wascypos + scramount)
iscypos = ss.getCurrentYPos()
isAboveNow = (iscypos < dest)
if ((isAbove != isAboveNow) || (wascypos == iscypos)) {
// if we've just scrolled past the destination, or
// we haven't moved from the last scroll (i.e., we're at the
// bottom of the page) then scroll exactly to the link
window.scrollTo(0,dest)
// cancel the repeating timer
clearInterval(ss.INTERVAL)
// and jump to the link directly so the URL's right
location.hash = anchor
}
},
getCurrentYPos: function() {
if (document.body && document.body.scrollTop)
return document.body.scrollTop
if (document.documentElement && document.documentElement.scrollTop)
return document.documentElement.scrollTop
if (window.pageYOffset)
return window.pageYOffset
return 0
},
addEvent: function(elm, evType, fn, useCapture) {
// addEvent and removeEvent
// cross-browser event handling for IE5+, NS6 and Mozilla
// By Scott Andrew
if (elm.addEventListener){
elm.addEventListener(evType, fn, useCapture)
return true
} else if (elm.attachEvent){
var r = elm.attachEvent("on"+evType, fn)
return r
} else {
alert("Handler could not be removed")
}
}
}
ss.STEPS = 25
ss.addEvent(window,"load",ss.fixAllLinks)
</script>
