允许Android WebView的跨源请求

webView.setWebViewClient(new WebViewClient() {
    @Override
    public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
        WebResourceResponse response = super.shouldInterceptRequest(view, request);
        if (response != null) {
            response.setResponseHeaders(Collections.singletonMap("Access-Control-Allow-Origin", "*"));
        }
        return response;
    }
});

webView.setWebChromeClient(new WebChromeClient() {
    @Override
    public boolean onConsoleMessage(ConsoleMessage consoleMessage) {
        Log.d("WebView", consoleMessage.message());
        return true;
    }
});