Is there any way to change the background color activity through java file in android? -

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I try to change background color activity via Java file but it does not work

Such as

Is there a way to change background color via a Java file? (Do not XML file)?

You can change the background of activity to drawable < / P>

using the code. This way 

  getWindow () SetBackgroundDrawableResource (R.drawable.your_bg); Set

or color as 

  getWindow (). SetBackgroundDrawable (New ColorDrawable (Color.GREEN));

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