Android Question Microampere and app

[AlpVir]

It uses more power app with a white background or black background ?
If so what would be the difference (in percentage) ?
Someone is able, eventually, to try to measure the micro-microampere consumption of simple app below, in two different states (white / black) ?

Sub process_Globals
End Sub

Sub Globals
    Dim panel1 As Panel   
    Dim BN    As Boolean
End Sub

Sub Activity_Create(FirstTime As Boolean)
    panel1.Initialize("panel1")
    Activity.AddView (panel1,0,0,100%x,100%y)
    panel1.Color = Colors.White
    BN = False
End Sub

Sub Activity_Resume
End Sub

Sub Activity_pause (UserClosed As Boolean)
End Sub

Sub panel1_click
    If BN = False Then
        panel1.Color = Colors.white
        BN = True
    Else
        panel1.Color = Colors.Black
        BN = False
    End If
End Sub

Of course, disabling the network, wifi, bluetooth and every possible cause of consumption different from the app itself.
I would understand if, in developing an app that saves the battery AT MOST, you must pick the black background, or if it is indifferent.
I know that in ebook readers such a question would not make sense, but in the smartphone ....
Thanks in advance for the unusual request.

 

[rbsoft]

With LCD based Displays there should not be too much of a difference if you are using a black or a white background. These displays are backlit.

I does make a great difference with OLED Display. The lighter a pixel is the more power it consumes. A black pixel consumes almost no power.

For more information see this article and check under the heading "Better power efficiency and thickness":
http://en.wikipedia.org/wiki/OLED#Advantages


Rolf

 

[AlpVir]

Tanks Rolf