我可以将XML布局转换为可绘制的吗？

Question

So I want to put an xml-layout as a background to a view, but then it has to be a drawable. So is there any way to turn an it into a drawable?

I've also tried inflating it, but nothing works the way I want :(

Thx in advance.

Answer 1

Basically like @CommonsWare said.
1. Get the LayoutInflator of the activity
2. inflate the layout like inflater.inflate(R.layout.sample,null,false)
3. Create a canvas, that saves all the drawings into a defined bitmap like this

Bitmap b = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);

4. Draw the created view into the canvas like this
   

    View v = inflater.inflate(R.layout.sample,null,false); // inflate view here v.layout(v.getLeft(), v.getTop(), v.getRight(), v.getBottom()); v.draw(c); 

5. Use the bitmap, the canvas did draw

6. Consider saving the bitmap locally in terms of redrawing of the activity, see following explanation:

Depending on how dynamically and often you want to create this background via canvas you should furthermore consider to save the created bitmap somewhere (temporarily), because each time the layout changes (eg checkbox selection), the whole canvas has to be redrawn and the inflating process needs to be done a second time too, what can lead to runtime lags in the UI. So just save this bitmap somewhere and reload it maybe, that's what i did in am similar case.