java - 如何使用 WebView 从 Google Drive 下载 PDF 文件

Question

我想从我的驱动器链接下载文件。我不知道该怎么做以及代码是什么。网址是https://drive.google.com/open?id=1txJFXxL9uY3AjyQ3C2G9t9lSkhJqaxuO 。当我尝试这段代码时，我的 WebView 卡住了。

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_wvnpwpop);

    //Webview
    WebView webView = findViewById(R.id.wvnpwpop);
    webView.setWebViewClient(new WebViewClient());
    webView.loadUrl("https://drive.google.com/open?id=1txJFXxL9uY3AjyQ3C2G9t9lSkhJqaxuO");
    webView.setDownloadListener(new DownloadListener() {
        public void onDownloadStart(String url, String userAgent,
                                    String contentDisposition, String mimetype,
                                    long contentLength) {
            DownloadManager.Request request = new DownloadManager.Request( Uri.parse(url));
            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "myPDFfile.pdf");
            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);
        }
    });
    //WebSettings
    WebSettings webSettings = webView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setSupportMultipleWindows(true);
    webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
    webSettings.setSupportMultipleWindows(true);
    // -------- End Of WebView and Web Settings

Answer 1

尝试一下并检查:

 webView.setDownloadListener(new DownloadListener() {
    public void onDownloadStart(String url, String userAgent,
                String contentDisposition, String mimetype,
                long contentLength) {
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setData(Uri.parse(mUrl));
        startActivity(i);
    }
});