Android Question SOLVED FileUriExposedException - exposed beyond app through Intent.getData()

A

alon

Active Member
Licensed User
Longtime User
Hi,

I was trying to find a solution to the error massage I am getting when I am trying to open a file:
"exposed beyond app through Intent.getData()"

I put every PERMISSION that I found in the forum that might cause the error
But with not much luck.


Can someone please help


Thanks
Code: 
'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: https://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="28"/>
<supports-screens android:largeScreens="true" 
    android:normalScreens="true" 
    android:smallScreens="true" 
    android:anyDensity="true"/>
    
    
  <uses-permission android:name="android.permission.INTERNET"/>
  <uses-permission android:name="android.permission.CALL_PHONE"/>    
  <uses-permission android:name="android.permission.CAMERA"/>
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
  <uses-permission android:name="android.permission.READ_MEDIA_STORAGE"/>
  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
 
      

    )


AddActivityText(AttachedFiles,
<intent-filter>
  <action android:name="android.intent.action.PICK" />
  <category android:name="android.intent.category.DEFAULT" />
  <data android:mimeType="image/*" />
</intent-filter>
<intent-filter>
  <action android:name="android.intent.action.GET_CONTENT" />
  <category android:name="android.intent.category.DEFAULT" />
  <category android:name="android.intent.category.OPENABLE" />
  <data android:mimeType="image/*" />
</intent-filter>
)



CreateResource(layout, checkbox,
  <CheckBox xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/ChkSaveLogin"

  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:button="@null"
  android:drawableRight="?android:attr/listChoiceIndicatorMultiple"

  android:tag="ChkSaveLogin" />
)

CreateResourceFromFile(Macro, Core.NetworkClearText)

SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
'End of default text.
AddManifestText(<uses-feature android:name="android.hardware.location.gps"/>)

'====================================
'    23-04-2019 = Push Notifications
CreateResourceFromFile(Macro, FirebaseAnalytics.GooglePlayBase)
CreateResourceFromFile(Macro, FirebaseAnalytics.Firebase)
CreateResourceFromFile(Macro, FirebaseNotifications.FirebaseNotifications)
'====================================
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" />
)

Code: 
'
Sub FTP_DownloadCompleted (ServerPath As String, Success As Boolean)
    Starter.FTP.Close
    Log(ServerPath & ", Success=" & Success)
    If Success = False Then
        Log(LastException.Message)
    Else
        Try
            
            Dim sFileType As String 
            sFileType = ServerPath.SubString(ServerPath.Length-4)
            If sFileType.SubString2(0,1) = "." Then
                sFileType = sFileType.SubString(1)
            End If
            ServerPath = "tmpFile." & sFileType
            Dim i As Intent
            i.Initialize(i.ACTION_VIEW, "file://" & File.Combine(Starter.TargetFolder & "/",  ServerPath))
            i.SetComponent("android/com.android.internal.app.ResolverActivity")
            
            Dim types As Map
            types.Initialize
            
            types.Put("apk","application/vnd.android.package-archive")
            types.Put("au","audio/basic")
            types.Put("avi","video/msvideo, video/avi, video/x-msvideo")
            types.Put("bmp","image/bmp")
            types.Put("bz2","Application/x-bzip2")
            types.Put("css","text/css")
            types.Put("dtd","Application/xml-dtd")
            '            types.Put("doc","Application/msword")
            types.Put("doc","application/msword")
            '            types.Put("docx","Application/vnd.openxmlformats-officedocument.wordprocessingml.document")
            types.Put("docx","application/msword")
            types.Put("dotx","Application/vnd.openxmlformats-officedocument.wordprocessingml.template")
            types.Put("es","Application/ecmascript")
            types.Put("exe","Application/octet-stream")
            types.Put("gif","image/gif")
            types.Put("gz","Application/x-gzip")
            types.Put("hqx","Application/mac-binhex40")
            types.Put("html","text/html")
            types.Put("jar","Application/java-archive")
            types.Put("jpg","image/jpeg")
            types.Put("js","Application/x-javascript")
            types.Put("midi","audio/x-midi")
            types.Put("mp3","audio/mpeg")
            types.Put("mpeg","video/mpeg")
            types.Put("ogg","audio/vorbis, Application/ogg")
            types.Put("pdf","application/pdf")
            types.Put("pl","Application/x-perl")
            types.Put("png","image/png")
            types.Put("potx","Application/vnd.openxmlformats-officedocument.presentationml.template")
            types.Put("ppsx","Application/vnd.openxmlformats-officedocument.presentationml.slideshow")
            types.Put("ppt","Application/vnd.ms-powerpointtd>")
            types.Put("pptx","Application/vnd.openxmlformats-officedocument.presentationml.presentation")
            types.Put("psv","Application/postscript")
            types.Put("qt","video/quicktime")
            types.Put("ra","audio/x-pn-realaudio, audio/vnd.rn-realaudio")
            types.Put("ram","audio/x-pn-realaudio, audio/vnd.rn-realaudio")
            types.Put("rdf","Application/rdf, Application/rdf+xml")
            types.Put("rtf","Application/rtf")
            types.Put("sgml","text/sgml")
            types.Put("sit","Application/x-stuffit")
            types.Put("sldx","Application/vnd.openxmlformats-officedocument.presentationml.slide")
            types.Put("svg","image/svg+xml")
            types.Put("swf","Application/x-shockwave-flash")
            types.Put("tar.gz","Application/x-tar")
            types.Put("tgz","Application/x-tar")
            types.Put("tiff","image/tiff")
            types.Put("tsv","text/TAB-separated-values")
            types.Put("txt","text/plain")
            types.Put("wav","audio/wav, audio/x-wav")
            types.Put("xlam","Application/vnd.ms-excel.addin.macroEnabled.12")
            types.Put("xls","application/vnd.ms-excel")
            types.Put("xlsb","Application/vnd.ms-excel.sheet.binary.macroEnabled.12")
            types.Put("xlsx","application/vnd.ms-excel")
            '            types.Put("xltx","Application/vnd.openxmlformats-officedocument.spreadsheetml.template")
            types.Put("xltx","vnd.ms-excel")
            types.Put("xml","Application/xml")
            types.Put("zip","Application/zip, Application/x-compressed-zip")
            
            If types.ContainsKey(sFileType) Then
                i.SetType(types.Get(sFileType))
            Else
                i.SetType("application/vnd.android.package-archive")
            End If
'            
    
            StartActivity(i)
        Catch
            Log(LastException)
        End Try
    End If
End Sub
 
Sort by date Sort by votes
Yes missing....

B4X: 
            .....
            Dim out As OutputStream = File.OpenOutput(File.DirRootExternal, "document." & estensione, False)
            File.Copy2(Job.GetInputStream, out)
            out.Close '<------ very important
            Dim apro As Int
            apro = Msgbox2("Do you want Open Document in attachment ?", "Message", "Yes","","No", Null)
            If apro = DialogResponse.POSITIVE Then
                Dim i As Intent
                i.Initialize(i.ACTION_VIEW, "file://" & File.Combine(File.DirRootExternal & "/", "document."& estensione))
                .....
 
Upvote 0
it will not work with your code @MarcoRome as you are using a file uri. File uris are no longer allowed and you need to use FileProvider.
 
Upvote 0
MarcoRome said:
Yes missing....

B4X: 
            .....
            Dim out As OutputStream = File.OpenOutput(File.DirRootExternal, "document." & estensione, False)
            File.Copy2(Job.GetInputStream, out)
            out.Close '<------ very important
            Dim apro As Int
            apro = Msgbox2("Do you want Open Document in attachment ?", "Message", "Yes","","No", Null)
            If apro = DialogResponse.POSITIVE Then
                Dim i As Intent
                i.Initialize(i.ACTION_VIEW, "file://" & File.Combine(File.DirRootExternal & "/", "document."& estensione))
                .....
Click to expand...


The file is already downloaded i dont need to Copy the file from the job I am using ftp download.
and the intent Initialize is also the same.
 
Upvote 0
DonManfred said:
it will not work with your code @MarcoRome as you are using a file uri. File uris are no longer allowed and you need to use FileProvider.
Click to expand...

Right what you say dear Don. But it was to make it clear that:
1. The file should be saved on your device and then opened with the intent
 
Last edited:
Upvote 0
Insert this code in your manifest:

B4X: 
'Aggiunto per Gestione File esterni ( act_menu )
AddManifestText(<uses-permission
    android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="18" />
)

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,
   <external-files-path name="name" path="shared" />
)

This in Starter:

B4X: 
'Per gestione file esterni
Public rp As RuntimePermissions
Public shared As String

Sub Service_Create
    'This is the program entry point.
    'This is a good place to load resources that are not specific to a single activity.
    shared = rp.GetSafeDirDefaultExternal("shared")
End Sub

This in your activity

B4X: 
Sub CreateFileProviderUri (Dir As String, FileName As String) As Object
    Dim FileProvider As JavaObject
    Dim context As JavaObject
    context.InitializeContext
    FileProvider.InitializeStatic("android.support.v4.content.FileProvider")
    Dim f As JavaObject
    f.InitializeNewInstance("java.io.File", Array(Dir, FileName))
    Return FileProvider.RunMethod("getUriForFile", Array(context, Application.PackageName & ".provider", f))
End Sub

......
Case "allegato"
               
                ......
                Dim out As OutputStream = File.OpenOutput(Starter.shared, "Informativa_privacy." & estensione, False)
                File.Copy2(Job.GetInputStream, out)
                out.Close '<------ very important

                Dim i As Intent
                'i.Initialize(i.ACTION_VIEW, "file://" & File.Combine(File.DirRootExternal & "/", "document."& estensione))
                i.Initialize(i.ACTION_VIEW, CreateFileProviderUri(Starter.shared, "Informativa_privacy."& estensione))
                i.Flags = 1
                i.SetComponent("android/com.android.internal.app.ResolverActivity")
                Select estensione
                    Case "pdf"
                        i.SetType("application/pdf")
                    Case "docx"
                        i.SetType("application/vnd.openxmlformats-officedocument.wordprocessingml.document")
                        'i.SetType("application/msword")
                    Case "txt"
                        i.SetType("text/plain")
                    Case "jpg"
                        i.SetType("image/jpg")
                    Case "jpeg"
                        i.SetType("image/jpeg")
                End Select
                 
                StartActivity(i)
               
               
End Select
 
Last edited:
Upvote 0
alon said:
The file is already downloaded i dont need to Copy the file from the job I am using ftp download.
and the intent Initialize is also the same.
Click to expand...

In your case ( FTP )

Insert this code in your manifest:

B4X: 
'Aggiunto per Gestione File esterni ( act_menu )
AddManifestText(<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
)

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,
<external-files-path name="name" path="shared" />
)



This in Starter:
B4X: 
'Per gestione file esterni
Public rp As RuntimePermissions
Public shared As String

Sub Service_Create
'This is the program entry point.
'This is a good place to load resources that are not specific to a single activity.
shared = rp.GetSafeDirDefaultExternal("shared")
End Sub

This in your activity

B4X: 
...
FTP.DownloadFile("/file.pdf", False, Starter.shared, "test.pdf") 
.....

Sub CreateFileProviderUri (Dir As String, FileName As String) As Object
    Dim FileProvider As JavaObject
    Dim context As JavaObject
    context.InitializeContext
    FileProvider.InitializeStatic("android.support.v4.content.FileProvider")
    Dim f As JavaObject
    f.InitializeNewInstance("java.io.File", Array(Dir, FileName))
    Return FileProvider.RunMethod("getUriForFile", Array(context, Application.PackageName & ".provider", f))
End Sub

Sub FTP_DownloadCompleted (ServerPath As String, Success As Boolean)
    Starter.FTP.Close
    Log(ServerPath & ", Success=" & Success)
    If Success = False Then
        Log(LastException.Message)
    Else
        Try
            
            Dim sFileType As String
            sFileType = ServerPath.SubString(ServerPath.Length-4)
            If sFileType.SubString2(0,1) = "." Then
                sFileType = sFileType.SubString(1)
            End If
            ServerPath = "tmpFile." & sFileType
            Dim i As Intent
            i.Initialize(i.ACTION_VIEW, CreateFileProviderUri(Starter.shared, "Informativa_privacy."& estensione))
            'i.Initialize(i.ACTION_VIEW, "file://" & File.Combine(Starter.TargetFolder & "/",  ServerPath))
            i.SetComponent("android/com.android.internal.app.ResolverActivity")
            ....
 
Upvote 0
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