Android Question [Resolved] Unfortunately on Android 2.2

sangee · Jan 9, 2015

Dear All..

Due to a unfortunate business idea I am forced to re write a camera application on Android 2.2. Its a severe problem as the CameraEx class does not work in this version

.

I just need to capture frames from the camera in a fast timing (capture 2 images / second)

I tried to use the Camera1_PictureTaken method, it works but is very slow (captures only 1 image in two or three seconds)

I am not able to use the Camera1_Preview like in latest Androids as the PreviewImageToJpeg is not working properly as I simply dont know how to do it

..The code I am trying to do is below..

The function PreviewImageToJpeg is to convert YUV format to JPEG which could be the problem I guess but I am not able to fix it.. need some help in this please..

Can any one help me in using the camera_preview with out using CameraExclass please...

Thanks,
Sangee

B4X:

Sub Camera1_Preview (Data() As Byte)
    Dim forDate As String
    DateTime.DateFormat ="HH.mm.ss.SS_dd-MM-yy"
    forDate=DateTime.Date(DateTime.now)
   
    Dim Tcr As String
    DateTime.DateFormat ="HH:mm:ss  dd-MM-yyyy"
    Tcr = DateTime.Date(DateTime.now)
   
    Dim tempstr As StringBuilder
    tempstr.Initialize
    tempstr.Append(forDate).Append("_").Append(Hostname).Append("_")
   
    InProg=True
        If DateTime.now > lastPreviewSaved + IntervalMs Then
            Dim jpeg() As Byte = PreviewImageToJpeg(Data, 90)
           
             Dim InputStream As InputStream
             InputStream.InitializeFromBytesArray(jpeg, 0, jpeg.Length)
            btmp.InitializeMutable(640,480)
            Canvas1.Initialize2(btmp)
            Dim Bitmap1 As Bitmap
             Bitmap1.Initialize2(InputStream)
             InputStream.Close

            Dim Rect1 As Rect
            Rect1.Initialize(0,0,btmp.Width ,btmp.Height)
            Canvas1.DrawRect(Rect1, Colors.Gray,True, 1dip)
            Canvas1.DrawBitmap(Bitmap1,Null,Rect1)
            Canvas1.DrawLine(btmp.Width -270,btmp.Height -20, btmp.Width -2, btmp.Height -20, Colors.Black , 16dip)
            Canvas1.DrawText(Hostname & " - " & Tcr,btmp.Width -270,btmp.Height -15,Typeface.DEFAULT,15,Colors.White,"LEFT")
            Dim out As OutputStream
            out = File.OpenOutput(File.DirRootExternal, "/Images/" & tempstr & ".jpg", False)
            Canvas1.Bitmap.WriteToStream(out,45,"JPEG")
            out.Close
       
            lastPreviewSaved = DateTime.now
        End If
        InProg=False

End Sub

Erel · Jan 11, 2015

PreviewImageToJpeg should work on Android 2.2 as is. Do you get any error?

sangee · Jan 12, 2015

The PreviewImageToJpeg function..

B4X:

Public Sub PreviewImageToJpeg(data() As Byte, quality As Int) As Byte()

Try   
    Dim size, previewFormat As Object
    r.target = parameters
    size = r.RunMethod("getPreviewSize")
   
    previewFormat = r.RunMethod("getPreviewFormat")
    r.target = size
    Dim width = r.GetField("width"), height = r.GetField("height") As Int
    Dim width = r.GetField("width"), height = r.GetField("height") As Int
    Dim width = 640, height = 480 As Int
    'Log("width=" & width & " height=" & height)
    Dim yuvImage As Object = r.CreateObject2("android.graphics.YuvImage", _
        Array As Object(data, previewFormat, width, height, Null), _
        Array As String("[B", "java.lang.int", "java.lang.int", "java.lang.int", "[I"))
    r.target = yuvImage
    Dim rect1 As Rect
    rect1.Initialize(0, 0, r.RunMethod("getWidth"), r.RunMethod("getHeight"))
    Dim out As OutputStream
    out.InitializeToBytesArray(100)
    r.RunMethod4("compressToJpeg", Array As Object(rect1, quality, out), _
        Array As String("android.graphics.Rect", "java.lang.int", "java.io.OutputStream"))
    Return out.ToBytesArray
Catch
Log("EOEOEOEO" & LastException.Message)
    Return
End Try

End Sub

The error I get when the app starts..

B4X:

EOEOEOEOjava.lang.NoSuchMethodException: getPreviewSize


main_camera1_preview (java line: 335)


java.lang.NullPointerException
    at a3a.cam.update.main._camera1_preview(main.java:335)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:157)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
    at anywheresoftware.b4a.objects.CameraW$2$1$1.onPreviewFrame(CameraW.java:147)
    at android.hardware.Camera$EventHandler.handleMessage(Camera.java:338)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:4627)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:884)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:642)
    at dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException

Erel · Jan 12, 2015

This method is not available. Remove it and hardcode the width and height.

sangee · Jan 12, 2015

I have hard coded the size like below. Now I have the error while declaring the type of image.

I believe the method of declaring the preview format is wrong. Can you help me please..

B4X:

Public Sub PreviewImageToJpeg(data() As Byte, quality As Int) As Byte()

Try   
    Dim size, previewFormat As Object
    r.target = parameters
    'size = r.RunMethod("getPreviewSize")
   
    'previewFormat = r.RunMethod("getPreviewFormat")
    previewFormat = "YUV"
    'r.target = size
    'Dim width = r.GetField("width"), height = r.GetField("height") As Int
    'Dim width = r.GetField("width"), height = r.GetField("height") As Int
    Dim width = 640, height = 480 As Int
    'Log("width=" & width & " height=" & height)
    Dim yuvImage As Object = r.CreateObject2("android.graphics.YuvImage", _
        Array As Object(data, previewFormat, width, height, Null), _
        Array As String("[B", "java.lang.int", "java.lang.int", "java.lang.int", "[I"))
    r.target = yuvImage
    Dim rect1 As Rect
    'rect1.Initialize(0, 0, r.RunMethod("getWidth"), r.RunMethod("getHeight"))
    rect1.Initialize(0, 0, width, height)
    Dim out As OutputStream
    out.InitializeToBytesArray(100)
    r.RunMethod4("compressToJpeg", Array As Object(rect1, quality, out), _
        Array As String("android.graphics.Rect", "java.lang.int", "java.io.OutputStream"))
    Return out.ToBytesArray
Catch
Log("EOEOEOEO" & LastException.Message)
    Return
End Try

B4X:

EOEOEOEOjava.lang.IllegalArgumentException: argument type mismatch


main_camera1_preview (java line: 335)


java.lang.NullPointerException
    at a3a.cam.update.main._camera1_preview(main.java:335)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:157)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
    at anywheresoftware.b4a.objects.CameraW$2$1$1.onPreviewFrame(CameraW.java:147)
    at android.hardware.Camera$EventHandler.handleMessage(Camera.java:338)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:4627)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:884)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:642)
    at dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException

Erel · Jan 12, 2015

Remove the Try / Catch block to see the full error message.

sangee · Jan 13, 2015

As suggested.. I removed the Try / Catch block and the error is like below..

B4X:

main_previewimagetojpeg (java line: 738)


java.lang.RuntimeException: java.lang.IllegalArgumentException: argument type mismatch
    at anywheresoftware.b4a.agraham.reflection.Reflection.CreateObject2(Reflection.java:268)
    at a3a.cam.update.main._previewimagetojpeg(main.java:738)
    at a3a.cam.update.main._camera1_preview(main.java:331)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:157)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
    at anywheresoftware.b4a.objects.CameraW$2$1$1.onPreviewFrame(CameraW.java:147)
    at android.hardware.Camera$EventHandler.handleMessage(Camera.java:338)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:4627)
    at java.lang.reflect.Method.invokeNative(Native Method)


    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:884)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:642)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: argument type mismatch
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
    at anywheresoftware.b4a.agraham.reflection.Reflection.CreateObject2(Reflection.java:265)
    ... 17 more
java.lang.RuntimeException: java.lang.IllegalArgumentException: argument type mismatch

Erel · Jan 13, 2015

Your code is wrong. PreviewFormat should be an int. getPreviewFormat is available on your device. You should call it like in the original code.

sangee · Jan 14, 2015

Modified the function like below.. looks like the method is not available..

B4X:

Public Sub PreviewImageToJpeg(data() As Byte, quality As Int) As Byte()

'Try   
    Dim size, previewFormat As Object
    r.target = parameters
    'size = r.RunMethod("getPreviewSize")
    previewFormat = r.RunMethod("getPreviewFormat")
    'previewFormat = "YUV_420_888"
    'r.target = size
    'Dim width = r.GetField("width"), height = r.GetField("height") As Int
    'Dim width = r.GetField("width"), height = r.GetField("height") As Int
    Dim width = 640, height = 480 As Int
    'Log("width=" & width & " height=" & height)
    Dim yuvImage As Object = r.CreateObject2("android.graphics.YuvImage", _
        Array As Object(data, previewFormat, width, height, Null), _
        Array As String("[B", "java.lang.int", "java.lang.int", "java.lang.int", "[I"))
    r.target = yuvImage
    Dim rect1 As Rect
    'rect1.Initialize(0, 0, r.RunMethod("getWidth"), r.RunMethod("getHeight"))
    rect1.Initialize(0, 0, width, height)
    Dim out As OutputStream
    out.InitializeToBytesArray(100)
    r.RunMethod4("compressToJpeg", Array As Object(rect1, quality, out), _
        Array As String("android.graphics.Rect", "java.lang.int", "java.io.OutputStream"))
    Return out.ToBytesArray
'Catch
'Log("EOEOEOEO" & LastException.Message)
'    Return
'End Try

End Sub

Error ....

B4X:

main_previewimagetojpeg (java line: 733)


java.lang.NoSuchMethodException: getPreviewFormat


    at java.lang.ClassCache.findMethodByName(ClassCache.java:308)
    at java.lang.Class.getDeclaredMethod(Class.java:748)
    at anywheresoftware.b4a.agraham.reflection.Reflection.runmethod(Reflection.java:214)
    at anywheresoftware.b4a.agraham.reflection.Reflection.RunMethod(Reflection.java:802)
    at a3a.cam.update.main._previewimagetojpeg(main.java:733)
    at a3a.cam.update.main._camera1_preview(main.java:331)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:157)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
    at anywheresoftware.b4a.objects.CameraW$2$1$1.onPreviewFrame(CameraW.java:147)
    at android.hardware.Camera$EventHandler.handleMessage(Camera.java:338)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:123)


    at android.app.ActivityThread.main(ActivityThread.java:4627)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:884)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:642)
    at dalvik.system.NativeStart.main(Native Method)
java.lang.NoSuchMethodException: getPreviewFormat

Erel · Jan 14, 2015

This is strange. getPreviewFormat should be available on all versions: http://developer.android.com/reference/android/hardware/Camera.Parameters.html#getPreviewFormat()

You will need to find the right value and use it instead.

sangee · Jan 16, 2015

It works ! Now I am able to save images from the Camera1_Preview sub directly. Thanks for being there Erel..

B4X:

Public Sub PreviewImageToJpeg(data() As Byte, quality As Int) As Byte()

Try   
    Dim size, previewFormat As Object
    r.target = parameters
    previewFormat = 17
    Dim width = 640, height = 480 As Int
    Dim yuvImage As Object = r.CreateObject2("android.graphics.YuvImage", _
    Array As Object(data, previewFormat, width, height, Null), _
    Array As String("[B", "java.lang.int", "java.lang.int", "java.lang.int", "[I"))
    r.target = yuvImage
    Dim rect1 As Rect
    rect1.Initialize(0, 0, width, height)
    Dim out As OutputStream
    out.InitializeToBytesArray(100)
    r.RunMethod4("compressToJpeg", Array As Object(rect1, quality, out), _
        Array As String("android.graphics.Rect", "java.lang.int", "java.io.OutputStream"))
    Return out.ToBytesArray
Catch
Log("EOEOEOEO" & LastException.Message)
    Return
End Try

End Sub

Android Question [Resolved] Unfortunately on Android 2.2

sangee

Member

Erel

B4X founder

sangee

Member

Erel

B4X founder

sangee

Member

Erel

B4X founder

sangee

Member

Erel

B4X founder

sangee

Member

Erel

B4X founder

sangee

Member

Similar Threads