我需要在加载页面中注入(inject)一些javaScript文件。
我的代码:
@Override
public void doUpdateVisitedHistory(WebView view, String url, boolean isReload) {
super.doUpdateVisitedHistory(view, url, isReload); //To change body of overridden methods use File | Settings | File Templates
mWebView.loadUrl("javascript:(function(){var script = document.createElement('script');script.setAttribute('src', 'file:///android_asset/jquery.js'); script.setAttribute('type', 'text/javascript'); document.body.appendChild(script)})();");
mWebView.loadUrl("javascript:(function(){var script = document.createElement('script');script.setAttribute('src', 'file:///android_asset/rangy-core.js'); script.setAttribute('type', 'text/javascript'); document.body.appendChild(script)})();");
mWebView.loadUrl("javascript:(function(){var script = document.createElement('script');script.setAttribute('src', 'file:///android_asset/rangy-serializer.js'); script.setAttribute('type', 'text/javascript'); document.body.appendChild(script)})();");
mWebView.loadUrl("javascript:(function(){var script = document.createElement('script');script.setAttribute('src', 'file:///android_asset/android.selection.js'); script.setAttribute('type', 'text/javascript'); document.body.appendChild(script)})();");// .
}
但这不行=(
将代码更改为
mWebView.loadUrl("javascript:function loadScript(url, callback)" +
"{" +
" var head = document.getElementsByTagName('head')[0];" +
" var script = document.createElement('script');" +
" script.type = 'text/javascript';" +
" script.src = url;" +
" script.onreadystatechange = callback;" +
" script.onload = callback;" +
" head.appendChild(script);" +
"}");
mWebView.loadUrl("javascript:loadScript('file:///android_asset/jquery.js','callback')");
mWebView.loadUrl("javascript:loadScript('file:///android_asset/rangy-core.js','callback')");
mWebView.loadUrl("javascript:loadScript('file:///android_asset/rangy-serializer.js','callback')");
mWebView.loadUrl("javascript:loadScript('file:///android_asset/android.selection.js','callback')");
现在我有错误:06-11 10:24:15.432: ERROR/Web Console(7962): 不允许加载本地资源:file:///android_asset/jquery.js at null:0
最佳答案
您可以使用js方法加载js文件并从java传递url作为参数
这是完整的工作示例
[ Activity .java]
public class MainActivity extends Activity {
WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.webview);
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(new JavaScriptInterface(), "jsinterface");
mWebView.loadUrl("file:///android_asset/sq.html");
}
final class JavaScriptInterface {
JavaScriptInterface() {
}
@JavascriptInterface
public void windowLoaded() {
mWebView.loadUrl("javascript:loadScript('test.js', 'testing')");
Log.i("browser", "browser loaded");
}
}
}
[sq.html]
<html>
<head>
<script>
onload = function () {
window.jsinterface.windowLoaded();
}
//JS
function loadScript(url, callback)
{
console.log("loading script " + url);
// adding the script tag to the head as suggested before
var head = document.getElementsByTagName('head')[0];
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = url;
// then bind the event to the callback function
// there are several events for cross browser compatibility
//script.onreadystatechange = callback;
script.onload = callback;
// fire the loading
head.appendChild(script);
}
</script>
</head>
<body>replace this
</body>
</html>
Assets 文件夹内的[test.js]
document.body.innerHTML = "<p>testing</p>";
成功执行后，webview 将通过动态加载 test.js 来显示测试。
关于javascript - 将js文件注入(inject)到webview中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17041472/