Android Question How to capture a snapshot of BCTextEngine

[asales]

I use this code to get a snapshot of a scrollview in a panel:

Dim x As B4XView = panel1
Dim b As Bitmap = x.Snapshot

Is possible to get snapshot of all BCTextEngine content (even out of the screen)?

I tried with this code, but I'm get only the visible screen:

Dim x As B4XView = BBCodeView1.sv

Thanks in advance for any tip.

 

[Erel]

Textengine

good morning How could I write the content of textengine in pdf Sorry but I don't have much experience with this library and I didn't find anything in the forum thanks

www.b4x.com

 

[asales]

Textengine

good morning How could I write the content of textengine in pdf Sorry but I don't have much experience with this library and I didn't find anything in the forum thanks

www.b4x.com

Thanks. This code works:

BBCodeView1.LazyLoading = False
(...)
Dim imagen As B4XBitmap = BBCodeView1.ForegroundImageView.GetBitmap
Dim Out As OutputStream
Out = File.OpenOutput(Starter.rp.GetSafeDirDefaultExternal(""), "pagina1.png", False)
imagen.WriteToStream(Out, 100, "PNG")
Out.Close

but I get a black background in the image.
I'm using the BCTextEngine Example and changed the colordrawable of BBCodeView to white.

What could be the problem and how I can fix it?

 

[Erel]

Are you sure that it is not transparent? Try to change the color behind it.

 

[asales]

Are you sure that it is not transparent? Try to change the color behind it.

Yes, it save as transparent background.

Even though I changed the color of the activity, the customlistview and the bbcodeview, it still save with a transparent background.

I get a black background in JPG and a transparent background in PNG in the snapshot and I want to get a white background.

 

[Erel]

Even though I changed the color of the activity, the customlistview and the bbcodeview, it still save with a transparent background.

This is expected. The text is drawn without any background on ForegroundImageView.
Create a B4XCanvas. Draw the background and then draw ForegroundImageView.GetBitmap.

 

[asales]

Create a B4XCanvas. Draw the background and then draw ForegroundImageView.GetBitmap.

Can you help with the code. I don't know how to do this.
The code below raises an error: java.lang.ClassCastException: android.graphics.Bitmap cannot be cast to android.view.View

Dim c As B4XCanvas
Dim x As B4XView = BBCodeView1.ForegroundImageView.GetBitmap
c.Initialize(x)
Dim b As B4XBitmap = c.CreateBitmap
b.WriteToStream(File.OpenOutput(img_dir, img_name, False), 80, "JPEG")

Thanks!

 

[Erel]

This code cannot work. B4XCanvas.Initialize expects a panel.

Dim p As B4XView = XUI.CreatePanel("")
p.SetLayoutAnimated(0, 0, 0, width, height)
c.Initialize(p)

 

[asales]

I don't understand, yet. My code still gets a black background:

Dim b As Bitmap = BBCodeView1.ForegroundImageView.Snapshot  'get the size to set the panel

Dim c As B4XCanvas
Dim p As B4XView = xui.CreatePanel("")
p.SetLayoutAnimated(0, 0, 0, b.width, b.height)
c.Initialize(p)

Dim r As B4XRect
r.Initialize(0, 0, b.Width, b.Height)

c.DrawBitmap(BBCodeView1.ForegroundImageView.GetBitmap, r)

Dim b1 As B4XBitmap = c.CreateBitmap
b1.WriteToStream(File.OpenOutput(img_dir, img_nome, False), 80, "JPEG")

 

[Erel]

Dim b As Bitmap = BBCodeView1.ForegroundImageView.Snapshot 'get the size to set the panel

This is a mistake. You should use GetBitmap.

c.DrawRect(c.TargetRect, xui.Red, True, 0)
c.DrawBitmap(...)

 

[asales]

This is a mistake. You should use GetBitmap.

Almost there.

I use this code to get the full size of BBCodeView1 (with the text outside of the screen) and resize the panel to use in the canvas.

Dim b As Bitmap = BBCodeView1.ForegroundImageView.Snapshot 'get the size to set the panel
(...)
p.SetLayoutAnimated(0, 0, 0, b.width, b.height)

How I can get the full size of the BBCodeView content?

 

[asales]

Another issue:
As I can get a white blackground now, I saw that the images and components (button, clv) are not capture in the snapshot.

What could be the problem?

 

[Erel]

I use this code to get the full size of BBCodeView1 (with the text outside of the screen) and resize the panel to use in the canvas.

No. No.

Dim v As B4XView = BBCodeView1.ForegroundImageView
p.SetLayoutAnimated(0, 0, 0, v.width, v.height)

As I can get a white blackground now, I saw that the images and components (button, clv) are not capture in the snapshot.

What could be the problem?

That's true. Only the text is drawn on ForegroundImageView. The images and other views are added as views to the internal ScrollView. With some work, you can get the views positions and draw them on the canvas.