Open A Pdf File Programmatically

October 08, 2022 Post a Comment

I am working on pdf. I am trying to open a pdf file from my application using the code below. But I failed to open. private void openPdf() { File file = new File('mnt/sdca

Solution 1:

I got solution of above problem, so try once;

Steps:-

create assets folder in src under your app name.
In this assets folder keep your pdf files e.g. schedule1.pdf.
now come your activity i.e MainActivity.java
setListener on any UI component what you want i.e (Button, ImageView, ImageButton);
In this listener call one user defined method i.e. openPDFFiles()

the openPDFFiles() method have below code:

private void openPDFFiles() {
    AssetManager assetManager = getAssets();

    InputStream in = null;
    OutputStream out = null;
    File file = new File(getFilesDir(), “schedule1.pdf”);//here schedule1.pdf is the pdf file name which is keep in assets folder.
    try {
        in = assetManager.open(“schedule1.pdf”);
        out = openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);

        copyFile(in, out);
        in.close();
        in = null;
        out.flush();
        out.close();
        out = null;
    } catch (Exception e) {
        Log.e(“tag”, e.getMessage());
    }

    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setDataAndType(Uri.parse(“file://” + getFilesDir() + “/schedule1.pdf”), “application/pdf”);

    startActivity(intent);
}

private void copyFile(InputStream in, OutputStream out) throws IOException {
    byte[] buffer = new byte[1024];
    int read;
    while ((read = in.read(buffer)) != -1) {
        out.write(buffer, 0, read);
    }
}

Solution 2:

Try LuxuryMode's method: https://stackoverflow.com/a/8221594/1500067

I think your just missing the adobe package intent.setPackage("com.adobe.reader");

Solution 3:

for android 9 and 10 you should use this code

1-create one class

public class GenericFileProvider extends FileProvider {

}

2-in res directory create one directory to name of xml and create one file to name of provider_paths.xml and add this code

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="external_files" path="."/>
</paths>

3-in manifests in application add this code

  <provider
    android:name=".Model.Utilitys.GenericFileProvider"
    android:authorities="${applicationId}.provider"
    android:exported="false"
    android:grantUriPermissions="true">
      <meta-data
         android:name="android.support.FILE_PROVIDER_PATHS"
         android:resource="@xml/provider_paths"/>
  </provider>

4-you should get Permission Manifest.permission.READ_EXTERNAL_STORAGE

5-and add this codes

String fileName="yourfile.pdf";

File file = new File(Environment.getExternalStorageDirectory()+"/Android/data/ir.tdaapp.paymanyar/files/File",fileName);

String extension = MimeTypeMap.getFileExtensionFromUrl(Uri.fromFile(file).toString());

String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);

Intent intent = new Intent(Intent.ACTION_VIEW);

intent.setFlags(FLAG_ACTIVITY_CLEAR_TOP | FLAG_ACTIVITY_NEW_TASK);

Uri uri = FileProvider.getUriForFile(getContext(), getActivity().getApplicationContext().getPackageName() + ".provider", file);

intent.setDataAndType(uri, mimeType);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

startActivity(Intent.createChooser(intent, "choseFile"));

6-I suggest you add this code to the application in manifests

android:requestLegacyExternalStorage="true"

Solution 4:

I have nearly identical code that works fine, though I'm not opening a file from SD card in my app.

Activity mActivity = /* your activity */...;
String mFileName = /* path of my PDF file */...;

Uri uri  = Uri.fromFile(mActivity.getFileStreamPath(mFileName));

try
{
    Intent intentUrl = new Intent(Intent.ACTION_VIEW);
    intentUrl.setDataAndType(uri, "application/pdf");
    intentUrl.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    mActivity.startActivity(intentUrl);
}
catch (ActivityNotFoundException e)
{
    Toast.makeText(mActivity, "No PDF Viewer Installed", Toast.LENGTH_LONG).show();
}

so your approach is right on. Make sure you can open the file first ... i.e. use mActivity.openFileInput() to ensure you have a readable PDF.

Solution 5:

You can achieve this using 3rd party library integration. Working libraries are listed below, with SDK

https://github.com/JoanZapata/android-pdfview
https://github.com/jblough/Android-Pdf-Viewer-Library

with NDK

https://code.google.com/p/mupdf/downloads/detail?name=mupdf-1.2-source.zip&can=2&q=

guide to use @

http://dixitpatel.com/integrating-pdf-in-android-application/

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