Android Question CameraEx, FocusDistances

Erel

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• Dec 17, 2015

• #2

See the method description: http://developer.android.com/refere...ra.Parameters.html#getFocusDistances(float[])

It returns three values, measured in meters.

B4X:

Dim f() As Float = CamEx.GetFocusDistances
Log(f(0))
Log(f(1))
Log(f(2))

 

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Urishev

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• Dec 22, 2015

• #3

I'm ashamed to ask primitive questions, but I don't know how to determine the components CamEx.GetFocusDistances.
How to work with Log (f(0)), Log (f(1)), Log (f(2))?
Thank you.

 

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eurojam

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• Dec 22, 2015

• #4

f(0) gives you near focus distance
f(1): optimal focus distance
f(2): far focus distance
f(2) - f(0) gives you depth of field...
Log("Anything...") means to give output to the LOG...in this case I would suggest to start with:
https://www.b4x.com/android/forum/threads/b4a-beginners-guide.9578/

 

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Urishev

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• Jan 10, 2016

• #5

Thank you!

 

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Urishev

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• Jan 15, 2016

• #6

Hello! I study the example “cameraEX” https://www.b4x.com/android/forum/attachments/cameraex-zip.17157/.

How to change the code to keep the camera running autofocus?

 

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eurojam

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• Jan 16, 2016

• #7

B4X:

    camEx.SetContinuousAutoFocus
    camEx.CommitParameters

 

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Urishev

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• Jan 16, 2016

• #8

Thanks for the quick reply, but unfortunately, there is no continuous focus.
Sub Camera1_Ready (Success As Boolean)
If Success Then
camEx.SetJpegQuality(90)
camEx.SetContinuousAutoFocus
camEx.CommitParameters
camEx.StartPreview
Log(camEx.GetPreviewSize)
Else
ToastMessageShow("Cannot open camera.", True)
End If
End Sub

 

Last edited: Jan 17, 2016

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eurojam

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• Jan 16, 2016

• #9

add the following to the class:

B4X:

Public Sub GetSupportedFocusModes As List
    r.target = parameters
    Return r.RunMethod("getSupportedFocusModes")
End Sub

Public Sub SetContinuousAutoFocus
    Dim modes As List = GetSupportedFocusModes
    If modes.IndexOf("continuous-picture") > -1 Then
        SetFocusMode("continuous-picture")
    Else If modes.IndexOf("continuous-video") > -1 Then
        SetFocusMode("continuous-video")
    Else
        Log("Continuous focus mode is not available")
    End If
End Sub

Public Sub SetFocusMode(Mode As String)
    r.target = parameters
    r.RunMethod2("setFocusMode", Mode, "java.lang.String")
End Sub

 

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Urishev

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• Jan 17, 2016

• #10

Thank you. I use code CameraExClass. At the start of the program Log:"Continuous focus mode is not available"
The command "camEx.FocusAndTakePicture" takes effect, appears autofocus. But "camEx.SetContinuousAutoFocus" - no autofocus. Why?
The problem in the code or in Sumsung GT P1000 ? Or in me?
I think to go from CameraExClass to ACL. But ACL has no FocusDistance?

 

Last edited: Jan 17, 2016

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Erel

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• Jan 17, 2016

• #11

There is no reason to switch to ACL. CameraEx is more powerful and maintained.

 

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Urishev

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• Jan 17, 2016

• #12

Ok, I will learn CameraEx (with your help).
Please post code examples CameraEX (I have “cameraEX” https://www.b4x.com/android/forum/attachments/cameraex-zip.17157/..)

 

Last edited: Jan 17, 2016

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