Android Question Save and Load a Picture into and from the device

ciginfo · Sep 24, 2020

Helo,
If I want save a double in the device, I can write:

B4X:

Sub Globals
    Dim FileNUMBERS As String      : FileNUMBERS = "Sets.txt"
    Dim Number as Double
   Dim MyNumber as Double
End Sub
Sub BtnEnreg_Click
    Number = 50
    Dim List1 As List
    List1.Initialize
    List1.Add(Number)
    File.WriteList(File.DirInternal, FileNUMBERS,List1)
End Sub

And if I want to load and recover my number I can write

B4X:

Sub BtnLoad_Click
    Dim List1 As List
    If File.Exists(File.DirInternal,FileNUMBERS) Then
        List1 = File.ReadList(File.DirInternal,FileSETTINGS)
        MyNumber = List1.Get(0)
End Sub

What is the syntax to do the same thing with a picture? I want to save a picture taken with camera and load it later

B4X:

Dim MyPicture as Bitmap

Thank you

Erel · Sep 24, 2020

ciginfo · Sep 24, 2020

Thank you Erel. And now how to load the picture saved to put it into an imageview?

ciginfo · Sep 24, 2020

Now I save photo with

B4X:

Sub SaveBitmap (b As Bitmap, myDir As String, myFileName As String)
    Dim out As OutputStream
    out = File.OpenOutput(myDir, myFileName, False)
    b.WriteToStream(out, 100, "JPEG")
    out.Flush
    out.Close
End Sub
 Sub BtnSave_Click
    SaveBitmap(lastPicture,File.DirInternal,"Foto.png")
End Sub

And I Load the saved picture with

B4X:

Sub BtnLoad_Click
    Dim bg As Bitmap = LoadBitmapResize(File.DirInternal, "Foto.png", ImageView1.Width, ImageView1.Height, True)
    ImageView1.SetBackgroundImage(bg).Gravity = Gravity.CENTER
End Sub

It seems that it does't find the path
"java.io.FileNotFoundException: /storage/3064-3162/Foto.png (No such file or directory)"

klaus · Sep 24, 2020

In
out = File.OpenOutput(myDir, myFileName, False)
what is the content of myDir and myFileName?

Geezer · Sep 24, 2020

Change the filenames to lowercase

Erel · Sep 25, 2020

1. No need to call out.Flush.
2. No need to change the filename case.
3. The code you posted is correct. The problem is somewhere else. Maybe you are trying to load the image before it was saved.

Android Question Save and Load a Picture into and from the device

ciginfo

Well-Known Member

Erel

B4X founder

ciginfo

Well-Known Member

ciginfo

Well-Known Member

klaus

Expert

Geezer

Active Member

Erel

B4X founder

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Android Question Save and Load a Picture into and from the device

ciginfo

Well-Known Member

Erel

B4X founder

ciginfo

Well-Known Member

ciginfo

Well-Known Member

klaus

Expert

Geezer

Active Member

Erel

B4X founder

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