创建一个空白的drawable
myPopupWindow.setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
I've used a PopupWindow. With this PopupWindow I set the BackgroundDrawable to an empty BitmapDrawable.
When I use the following code it gives a deprecated warning:
myPopupWindow.setBackgroundDrawable(new BitmapDrawable());
So I changed it to:
myPopupWindow.setBackgroundDrawable(new BitmapDrawable(getApplicationContext().getResources(),Bitmap.createBitmap(0, 0, Bitmap.Config.ARGB_8888) ));
This gave me an error that a Bitmap must have a width and height bigger than 0.
Right now I use:
myPopupWindow.setBackgroundDrawable(new BitmapDrawable(getApplicationContext().getResources(),Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888) ));
And it works. But it just seems a bit wrong to use a 1x1 pixel Bitmap instead of a completely empty one like I want to. Is there another way to actually use an empty BitmapDrawable, instead of one that is 1 by 1 pixels?
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2 down vote
accepted
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Ok, instead of
myPopupWindow.setBackgroundDrawable(new BitmapDrawable());
OR
myPopupWindow.setBackgroundDrawable(new BitmapDrawable(getApplicationContext().getResources(),Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888) ));
I just use a background-color that I want to set to the PopupWindow. So for example, one of my PopupWindows just had a few Images without margins in between them, so I just used a Transparent background for it:
myPopupWindow.setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
And for another one I wanted to use a white background anyway, so I've used:
myPopupWindow.setBackgroundDrawable(new ColorDrawable(android.graphics.Color.WHITE));
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