使用android意图从服务器打开pdf文件 [英] Opening pdf file from server using android intent

问题描述

我在网上搜索如何在 android 上使用默认的 pdf 查看器从服务器打开 pdf 文件.我发现是先下载文件，然后有意启动它或使用谷歌文档加载它.我不想做所有这些.我只想在手机的默认 pdf 查看器中直接从服务器加载它.我试过有意打开视频网址，它奏效了.但是有意打开 pdf url 不起作用.下面是我的代码；

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());
            }
    }

有什么方法可以加载 pdf url 吗?

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();
        }

    }
}

然后创建一个从互联网下载 PDF 文件的活动，

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AndroidManifest.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意图从服务器打开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！