如何使用Google文档在我的网页浏览中打开pdf？ （突然间它不起作用）

Question

不长的年龄，我可以使用我的代码在我的网页浏览中打开pdf。

view.loadUrl("https://docs.google.com/gview?embedded=true&url=" + str);

但突然间它不起作用。

我不知道原因。

如何在网页浏览中打开pdf？

Answer 1

创建下载程序类

public class Downloader {

    public static void DownloadFile(String fileURL, File directory) {
        try {

            FileOutputStream f = new FileOutputStream(directory);
            URL u = new URL(fileURL);
            HttpURLConnection c = (HttpURLConnection) u.openConnection();
            c.setRequestMethod("GET");
            c.setDoOutput(true);
            c.connect();

            InputStream in = c.getInputStream();

            byte[] buffer = new byte[1024];
            int len1 = 0;
            while ((len1 = in.read(buffer)) > 0) {
                f.write(buffer, 0, len1);
            }
            f.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

在setContentView(R.layout.main);之后的活动中写下这些行

String extStorageDirectory = Environment.getExternalStorageDirectory()
        .toString();
        File folder = new File(extStorageDirectory, "pdf");
        folder.mkdir();
        File file = new File(folder, "Read.pdf");
        try {
            file.createNewFile();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        Downloader.DownloadFile("URL", file);

        showPdf();

编写此方法

 public void showPdf()
        {
            File file = new File(Environment.getExternalStorageDirectory()+"/Mypdf/Read.pdf");
            PackageManager packageManager = getPackageManager();
            Intent testIntent = new Intent(Intent.ACTION_VIEW);
            testIntent.setType("application/pdf");
            List list = packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY);
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_VIEW);
            Uri uri = Uri.fromFile(file);
            intent.setDataAndType(uri, "application/pdf");
            startActivity(intent);
        }

在AndroidManifest.xml

中添加这些权限

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

Answer 2

我认为这个问题重复了，我得到了解决方案

1）输入：

 webView.loadUrl("https://docs.google.com/gview?url="+pdfUrl.get(position).url);

2）不要忘记设置webview客户端

webView.setWebViewClient(new WebViewClient() {
        ProgressDialog progressDialog;

        //If you will not use this method url links are opeen in new brower not in webview
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            if (progressDialog == null) {
                // in standard case YourActivity.this
                progressDialog = new ProgressDialog(getActivity());
                progressDialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
                progressDialog.setMessage("Loading...");
                progressDialog.show();
            }
        }

        public void onPageFinished(WebView view, String url) {
            if (progressDialog != null && progressDialog.isShowing()) {
                progressDialog.dismiss();
                progressDialog = null;
            }

        }

    });