使用Android的意图，从服务器上打开PDF文件 [英] Opening pdf file from server using android intent

问题描述

我在网上搜索了如何从服务器上的Andr​​oid默认的PDF查看器打开PDF文件上。我发现的是下载的文件第一次那么意图启动它或者与谷歌文档加载它。我不想做这些。我只是想直接从服务器从电话加载默认的PDF阅读器。我试过，意图打开视频网址和它的工作。但是，开放的PDF链接意图不工作。下面是我的code;

I'm searching on the web how to open pdf file from server with default pdf viewer on android. What I found is download the file first then start it in intent or load it with google docs. I don't want to do all these. I just want to load it directly from server in default pdf viewer from phone. I've tried opening video url with intent and it worked. But opening pdf url with intent is not working. Below is my code;

private void openFilePDF(){
        try{
            Toast.makeText(getBaseContext(), "Opening PDF... ", Toast.LENGTH_SHORT).show();
            Intent inte = new Intent(Intent.ACTION_VIEW);
            inte.setDataAndType(
                    Uri.parse("http://122.248.233.68/pvfiles/Guide-2.pdf"),
                    "application/pdf");

            startActivity(inte);
            }catch(ActivityNotFoundException e){
                Log.e("Viewer not installed on your device.", e.getMessage());
            }
    }

有没有什么办法，我可以加载PDF网址意图是什么？

Is there any way that I can load pdf url in intent?

推荐答案

首先创建一个下载器类

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();
        }

    }
}

之后，创建从互联网上下载的PDF文件中的一个活动，

After that create an activity which downloads the PDF file from internet,

public class MainActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        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("http://122.248.233.68/pvfiles/Guide-2.pdf", file);

        showPdf();
    }
    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);
        }
}

最后，在最后的的Andr​​oidManifest.xml

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

这篇关于使用Android的意图，从服务器上打开PDF文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！