使用FileProvider打开我的应用程序中包含的PDF？

Question

I have included two PDFs that I want to open from my app. They should open with whatever PDF viewer the user has installed. I placed the PDFs in /res/raw. I used this code:

File file = new File(getContext().getFilesDir().getPath(), s);
            Uri pdfUri = FileProvider.getUriForFile(getContext(), getContext().getApplicationContext().getPackageName() + ".provider", file);
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setDataAndType(pdfUri, "application/pdf");
            intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

My filepaths.xml looks like this:

<paths>
<files-path path="raw/" name="raw" />

I'm getting an error that says:

java.lang.IllegalArgumentException: Failed to find configured root that contains /data/data/com.dsv2019.pvt15.prepapp/files/hjartlugnraddning.pdf

Why is this happening?

Answer 1

You have a few problems.

First, <files-path path="raw/" name="raw" /> says that it serves files from a raw/ subdirectory under getFilesDir() . However, new File(getContext().getFilesDir().getPath(), s) will not have such a directory, unless it is in s somehow, and the error suggests that it is not. BTW, you can simplify this as new File(getContext().getFilesDir(), s) .

Second, I think that you are assuming the existence of a raw/ directory in getFilesDir() . Unless you create that directory, it will not exist.

Third, I think that you are thinking that raw resources are files on the device. They are not. They are files on your development machine. They are just entries in the APK file on the device.

So, to make this work, you need to add code to:

• Create a raw/ subdirectory off of getFilesDir()

• Use openRawResource() on a Resources object to copy the resource to a file in that newly-created raw/ subdirectory

• Use that File object from the preceding step with FileProvider.getUriForFile()