Android Question Camera2 - Save images and videos

[mackrackit]

Hi,

I am trying to learn from this example

Camera2 - Still images and videos

Camera2 library is based on the Camera2 API introduced in Android 5 (API 21). It is designed to work together with CamEx2 class. It is supported by B4A v7.3+. The library will be included as an internal library in the next update. Both image capturing and video recording are supported. CamEx2...

www.b4x.com

But I can not figure out hos to save a still or a video. When finished with a video the program returns "Video file saved with a size" no location. A still image does not either.

I am using a Galaxy S21 Ultra 5G, Android version 12.

Thank you,
Dave

 

[Erel]

Add Log(rp.GetSafeDirDefaultExternal("")) to find the path.
This is your app specific folder.

The relevant codes are:

cam.DataToFile(Data, VideoFileDir, "1.jpg") 'still image

'and

File.Copy(VideoFileDir, "temp-" & VideoFileName, VideoFileDir, VideoFileName)

If you want to let the user select the output folder then use the SaveAs code: https://www.b4x.com/android/forum/t...list-of-other-related-methods.129897/#content

 

[mackrackit]

Still no luck. No saved picture.


I added Log(rp.GetSafeDirDefaultExternal(""))
and
File.MakeDir(File.DirRootExternal, "CAM_DATA")
to Sub TakePicture to see if anything could be written. That is not working either.
returning the below log

/storage/emulated/0/Android/data/b4a.example/files
Error: (ErrnoException) android.system.ErrnoException: open failed: ENOENT (No such file or directory)
Start success: true

The only changes to the example are in Sub TakePicture and added Write permission to the manifest.

Sub TakePicture
    Try
        Log(rp.GetSafeDirDefaultExternal(""))
        rp.CheckAndRequest(rp.PERMISSION_WRITE_EXTERNAL_STORAGE)
        SetState(openstate, True, VideoMode)
        Wait For(cam.FocusAndTakePicture(MyTaskIndex)) Complete (Data() As Byte)
        SetState(openstate, False, VideoMode)
        cam.DataToFile(Data, VideoFileDir, "1.jpg")
        File.Copy(VideoFileDir, "temp-" & VideoFileName, VideoFileDir, VideoFileName)
        Dim bmp As Bitmap = cam.DataToBitmap(Data)
        Log("Picture taken: " & bmp) 'ignore
        pnlBackground.SetVisibleAnimated(100, True)
        B4XImageView1.Bitmap = RotateJpegIfNeeded(bmp, Data)
        
        File.MakeDir(File.DirRootExternal, "CAM_DATA")
        
        Sleep(4000)
        pnlBackground.SetVisibleAnimated(500, False)
    Catch
        HandleError(LastException)
    End Try
    
End Sub

The Manifest

'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="5" android:targetSdkVersion="31"/>
<supports-screens android:largeScreens="true" 
    android:normalScreens="true" 
    android:smallScreens="true" 
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
CreateResourceFromFile(Macro, Themes.LightTheme)
'End of default text.
AddPermission(android.permission.RECORD_AUDIO)
AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)

 

[DonManfred]

File.DirRootExternal

You do not have access to this folder with targetsdk=31

android.jar / targetSdkVersion / minSdkVersion

There are several versioned components that affect the compilation process and the runtime behavior of our apps. The purpose of this tutorial is to explain the differences between them and help you choose which version to use. Each Android version is mapped to an api level. You can see this...

www.b4x.com

 

[Erel]

You need to use the SaveAs code for any folder other than XUI.DefaultFolder = File.DirInternal or rp.GetSafeDirDefaultExternal.

 

[mackrackit]

Thank both you for trying to help me, but I am still missing something.
I changed everything back to the downloaded example with the exception of Log(rp.GetSafeDirDefaultExternal("")). Then set the targetsdk to 26 and tried 28.
Using the file manager on my phone or tablet 'Android/data/b4a.example/files' does not exist, I only have 'Android/data' ?? Both devices I am testing on are Android 12.

Logger connected to:  samsung SM-T220
--------- beginning of main
Copying updated assets files (10)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
LEVEL_3
Call B4XPages.GetManager.LogEvents = True to enable logging B4XPages events.
** Activity (main) Resume **
** Activity (main) Pause event (activity is not paused). **
** Activity (main) Resume **
Start success: false
Start success: true
/storage/emulated/0/Android/data/b4a.example/files
Error: (ErrnoException) android.system.ErrnoException: open failed: ENOENT (No such file or directory)
Start success: true
** Activity (main) Pause event (activity is not paused). **
** Service (starter) Destroy (ignored)**

 

[Erel]

Your file manager cannot access the app specific folder.

 

[Ivica Golubovic]

File.DirRootExternal can be used on SDK30 and above, but if you want to publish the app to the Play Store, then the only possibility is the one suggested by @Erel and @DonManfred.