XMLHttpRequest无法加载数据：application / pdf; base64，..... Cross＆gt;原始请求仅支持HTTP

Question

我在mWebView中调用URL时尝试加载base64 String作为参数。

mWebView.loadUrl("file:///android_asset/pdfjs/web/viewer.html?file=data:application/pdf;base64," + pdfString);

在PDF.js的帮助下将其呈现为PDF文件pdfString是将PDF转换为base64字符串。

在Chrome中调试webView时 - ＆gt; delevopler工具 - ＆gt;远程设备 - ＆gt;检查 - ＆gt; 我收到以下错误：

  

XMLHttpRequest无法加载数据：application / pdf; base64，..... Cross   原始请求仅支持HTTP。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mWebView = (WebView) findViewById(R.id.activity_main_webview);

    // Force links and redirects to open in the WebView instead of in a browser
    mWebView.setWebChromeClient (new WebChromeClient());

    // Enable Javascript
    WebSettings webSettings = mWebView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setAllowFileAccess(true);
    webSettings.setAllowContentAccess(true);
    webSettings.setAllowContentAccess(true);
    webSettings.setAllowFileAccessFromFileURLs(true);
    webSettings.setAllowUniversalAccessFromFileURLs(true);
    mWebView.setWebContentsDebuggingEnabled(true);


    String path = Environment.getExternalStorageDirectory().toString() + "/Download/income_tax_return.pdf";
    File file = new File(path);
    int size = (int) file.length();
    byte[] bytes = new byte[size];
    try {
        BufferedInputStream buf = new BufferedInputStream(new FileInputStream(file));
        buf.read(bytes, 0, bytes.length);
        buf.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    String pdfString = Base64.encodeToString(bytes, Base64.NO_WRAP);


   mWebView.loadUrl("file:///android_asset/pdfjs/web/viewer.html?file=data:application/pdf;base64," + pdfString);


}