Android Question error when convert byte to image

[azzam223]

hello i have load image from sql server database and insert it in sql lite database and when i convert the image from byte to bitmap i got this error

java.lang.OutOfMemoryError
    at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:528)
    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:600)
    at anywheresoftware.b4a.objects.drawable.CanvasWrapper$BitmapWrapper.Initialize2(CanvasWrapper.java:519)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:753)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:343)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:247)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:157)
    at anywheresoftware.b4a.debug.Debug.delegate(Debug.java:259)
    at b4a.example.frmfood._displyfood(frmfood.java:476)
    at b4a.example.frmfood._generatelist(frmfood.java:417)
    at b4a.example.frmfood._activity_create(frmfood.java:385)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:708)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:340)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:247)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
    at b4a.example.frmfood.afterFirstLayout(frmfood.java:102)
    at b4a.example.frmfood.access$000(frmfood.java:17)
    at b4a.example.frmfood$WaitForLayout.run(frmfood.java:80)
    at android.os.Handler.handleCallback(Handler.java:725)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5041)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
    at dalvik.system.NativeStart.main(Native Method)
Error occurred on line: 41
java.lang.RuntimeException: Object should first be initialized (Bitmap).
    at anywheresoftware.b4a.AbsObjectWrapper.getObject(AbsObjectWrapper.java:50)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:708)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:337)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:247)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
    at b4a.example.frmfood.afterFirstLayout(frmfood.java:102)
    at b4a.example.frmfood.access$000(frmfood.java:17)
    at b4a.example.frmfood$WaitForLayout.run(frmfood.java:80)
    at android.os.Handler.handleCallback(Handler.java:725)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5041)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
    at dalvik.system.NativeStart.main(Native Method)
An error occurred:
(Line: 101) End Sub
java.lang.RuntimeException: Array not expected...

 

[DonManfred]

The error is

OutOfMemoryError

How big is the image? Dimension, not size

 

[azzam223]

thanks donmanfred

but also when image size is 500*500 the same error happened what is limit of it dimension

 

[Erel]

Are you loading many images?

There is no hard limit. It depends on the process available memory.

A better way to load many images or images with unknown sizes is to save the data to a temporary file and then load it with LoadBitmapSample. It has two advantages:
1. It will downsample the image based on the provided width and height.
2. If there is not enough memory then it will downsample the image multiple times to avoid the process from crashing.

 

[azzam223]

thanks erel but when i save image in file and load it with LoadBitmapSample

the error happend

error loading bitmap

i use this code to save image in file

Public Sub Createfile(img() As Byte) As String
    Try
        Dim b As Bitmap
        Dim in As InputStream
        in.InitializeFromBytesArray(img,0,img.Length)
        b.Initialize2(in)
        Dim out As OutputStream
        Dim filename As Int=StateManager.GetSetting2("filename",0)
        filename=filename+1
        out=File.OpenOutput(File.DirDefaultExternal,$"${filename}.png"$,False)
        b.WriteToStream(out,100,"PNG")
StateManager.SetSetting("filename",0)
StateManager.SaveSettings
Return filename & ".png"

 

[Erel]

Not good. You should save the bytes to a file and load it with LoadBitmapSample.
https://www.b4x.com/android/forum/threads/b4x-bytes-to-file.70111/#content

 

[azzam223]

thanks erel