Android Question imgPicture.SetBackgroundImage

[scarr]

Hi All,

Having a problem with imgPicture.SetBackgroundImage

I use this code to select a picture and then save the path and file name into a database

Sub btnPicture_Click
    Dim Chooser As ContentChooser
    If Chooser.IsInitialized = False Then
        Chooser.Initialize("chooser")
    End If  
    Chooser.Show("image/*", "Select an image")
End Sub

Sub chooser_Result (Success As Boolean, Dir As String, FileName As String)
    If Success Then
        PictureName = FileName
        PictureDir = Dir
        Log(">" & PictureDir & ">" )
        Log(">" & PictureName & ">" )
        imgPicture.SetBackgroundImage(LoadBitmap(PictureDir,PictureName))
    Else
        ToastMessageShow("No image selected", True)
    End If
End Sub

This "imgPicture.SetBackgroundImage(LoadBitmap(PictureDir,PictureName))" works perfectly

I then retrieve the Path and filename and try to re-load the picture when moving through the database record and it fails!

    PictureName =  Cursor1.GetString("PictureName")
    PictureDir =  Cursor1.GetString("PictureDir")
    If(PictureName <>"" ) Then
        Log(">" & PictureDir & ">" )
        Log(">" & PictureName & ">" )
        imgPicture.SetBackgroundImage(LoadBitmap(PictureDir,PictureName))
    End If
    Cursor1.Close

As you can see I output the Dir and filename to the log and they are identical to what was saved but I get this error

java.io.FileNotFoundException: content:/com.android.providers.media.documents/document/image%3A7/ContentDir: open failed: ENOENT (No such file or directory)

I am testing in the emulator when this fails, anyone any ideas?

Steve

P.S. These are the Dir and Filename from the log

>ContentDir>
>content://com.android.providers.media.documents/document/image%3A7>

 

[Erel]

ContentChooser returns a virtual path that you can use to load the image. The path can be a temporary path.

Your only option if you want to later access the image is to store it yourself. You can add it directly to the database (make sure to resize it so it won't be too large) or save it in your app folder.

 

[scarr]

Thanks Erel, so your saying pic it up and move it to a folder of my choice or making?

File.Copy(PicturePath, PictureName, MyFolder, PictureName)

Can this be done in the emulator without issues?

 

[Erel]

Yes. It will also work in the emulator, however remember that the emulator file system is not your PC file system.

It can be risky to rely on the passed FileName to actually be a valid file name. Might be better to name it yourself.

 

[scarr]

Well I tried to make a folder In activity_create

        File.MakeDir(File.DirRootExternal,"Pics")

I then tried to move the picture when selected using chooser

                File.Copy(PictureDir, PictureName, File.DirRootExternal & "/Pics/", PictureName)

But it said no such file or directory, it looked like it created the folder Pics, this is probably a syntax slash thing but I have tried everything I can think of, but I am sure this is just stupidity on my behalf.

Steve

 

[Erel]

What is the value of PictureName?

Start with saving under File.DirInternal to avoid runtime permissions issues.

 

[scarr]

OK, So I have been trying to copy the file to a folder created be me, here are the lines of code, it fails when trying to copy the file.

        File.MakeDir(File.DirInternal,"Pics")
        Log(File.DirInternal &"/Pics")

Log shows /data/user/0/b4a.sqlitelight1/files/Pics

        imgPicture.SetBackgroundImage(LoadBitmap(PictureDir,PictureName))
        Log(File.DirInternal & "/Pics")
        File.Copy(PictureDir, PictureName, File.DirInternal & "/Pics/", PictureName)

File.Copy line fails with this error

java.io.FileNotFoundException: /data/user/0/b4a.sqlitelight1/files/Pics/content:/com.android.providers.media.documents/document/image%3A7: open failed: ENOENT (No such file or directory)

Any ideas?

Steve

 

[Erel]

You haven't answered my question:
What is the value of PictureName?

Log(PictureName)

 

[scarr]

Sorry Erel I missed that question!

content://com.android.providers.media.documents/document/image%3A7

Thanks

Steve

P.S. The real image is called 1.jpg

 

[Erel]

Please read my answer in post #4 again.

 

[scarr]

So, I am now using a real phone and USB cable to avoid issues, is there anyway of getting the real file name of the picture using Contentchooser?

Using a real phone I get this back

>content://com.android.providers.media.documents/document/image%3A5345>

and not the actual file name.

Steve

 

[Erel]

is there anyway of getting the real file name of the picture using Contentchooser

The correct answer is no.

1. There might not be a file at all.
2. The content provider which returns the URI can return any URI it likes.

 

[scarr]

Thanks Erel, OK, is there any other control that I can use to select a picture and it return the file name, Ideally just want to pass a folder name and have it display the pictures for selection.

Thanks Steve

 

[Erel]

Not if you want to use the standard Android way to select images.

You can use FileDialog from the Dialogs library to let the user select files (will require requesting the storage permission).