Android Question Opening PDF file with fileprovider is not working for all devices

[Zak Petr]

Hi,

I use this code for opening pdf file.

If File.Exists(File.DirInternal, inp_filename) = True Then
                    
            FProvider.Initialize
            
            File.Copy(File.Dirinternal, inp_filename, FProvider.SharedFolder, inp_filename)
            Dim in As Intent
            in.Initialize(in.ACTION_VIEW, "")
            FProvider.SetFileUriAsIntentData(in, inp_filename)
            'Type must be set after calling SetFileUriAsIntentData
            in.SetComponent("android/com.android.internal.app.ResolverActivity")
            in.SetType("application/pdf")
            
 
            StartActivity(in)
                    
        End If

part of manifest :

AddManifestText(<uses-permission
    android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="34" />
)

AddApplicationText(
  <provider
  android:name="android.support.v4.content.FileProvider"
  android:authorities="$PACKAGE$.provider"
  android:exported="false"
  android:grantUriPermissions="true">
  <meta-data
  android:name="android.support.FILE_PROVIDER_PATHS"
  android:resource="@xml/provider_paths"/>
  </provider>
)
CreateResource(xml, provider_paths,
   <files-path name="name" path="shared" />
)

It works fine, but only for part of devices . Some part of devices give us error like this:

android.content.ActivityNotFoundException: Unable to find explicit activity class {android/com.android.internal.app.ResolverActivity}; have you declared this activity in your AndroidManifest.xml, or does your intent not match its declared <intent-filter>?

Is there some stable solution how to open PDF file? . It means for all devices with SDK-25 and higher.



Many thaks for your answer.

 

[Erel]

This means that there is no installed app that can handle pdf intents.

You need to catch this error. Or use PackageManager.QueryIntentActivities (Phone library) and check whether there is app that can handle the intent.