Android WebView抛出“仅HTTP支持跨源请求".尝试从磁盘加载资源时发生异常 [英] Android WebView throws "cross origin requests are only supported for http" exception while trying to load resource from disk

问题描述

我用html/js开发了一个单页游戏，并试图将其托管在android webview中.我有一个文件夹src/main/assets/www/，此行代码可引导我的应用程序:

i have developed a single page game in html/js and am trying to host it inside an android webview. i have a folder src/main/assets/www/ and this line of code to bootstrap my app:

mWebView.loadUrl("file:///android_asset/www/index.html");

index.html加载一个app.js文件，这是我的游戏.当我尝试从app.js内部发出xhr请求以获取assets/myimage.svg(物理位置src/main/assets/www/assets/myimage.svg)时:

the index.html loads a app.js file which is my game. when i try to make an xhr request from within app.js to get assets/myimage.svg (physical location src/main/assets/www/assets/myimage.svg) :

var xhr = new XMLHttpRequest();
        xhr.open('get', 'assets/myimage.svg', true);
        xhr.send();

我收到此错误:cross origin requests are only supported for http.为什么这是跨域请求?我该怎么做才能解决此问题?我无法将svg托管在http网络服务器上，也不能内嵌在app.js中-它必须从磁盘加载.

I get this error: cross origin requests are only supported for http. why is this a cross-origin request? what can i do to fix this? i cannot host the svg on a http webserver and cannot inline it in app.js - it has to be loaded from disk.

推荐答案

不确定，但是您可以尝试以下步骤，看看是否有帮助:

Not sure but you can try these steps and see if it helps:

a)初始化您的WebView:

a) Initialize your WebView:

b)获取WebView设置:

b) get WebView settings:

WebSettings settings = _webView.getSettings();

c)设置以下设置:

settings.setAllowFileAccessFromFileURLs(true);
settings.setAllowUniversalAccessFromFileURLs(true);

d)现在，您可以通过标准方式加载html文件:

d) now you can load your your html file by standard way:

mWebView.loadUrl("file:///android_asset/www/index.html");

e)不要忘记在清单文件中添加Internet权限:

e) Don't forget to add the internet permission in your manifest file:

<uses-permission android:name="android.permission.INTERNET"/>

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