Get tiled bitmap / repeated bitmap

Question

I have a seamless background, and I have successfully show it on the screen repeatedly using below code:

BitmapDrawable bitmapDrawable = new BitmapDrawable(getResources(), bitmap);
bitmapDrawable.setTileModeX(Shader.TileMode.REPEAT);
bitmapDrawable.setTileModeY(Shader.TileMode.REPEAT);
mBackground.setBackground(bitmapDrawable);

However, I got an issue with getting the bitmap to save later. The background is matched screen size in width and height. When I try with below code to get the bitmap, the saved image is just the original seamless pattern.

((BitmapDrawable) mBackground.getBackground()).getBitmap()

I have no idea how to generate repeated background image.

Yes. I want to draw that bitmap repeatedly with different sizes. — Ralphilius, Jul 24 '17 at 08:28
if you want to draw it, then call `draw()` method on that `Drawable` — pskink, Jul 24 '17 at 08:43
not only width and height but even left, top, right and bottom — pskink, Jul 24 '17 at 08:56
Can you give an example? The `draw()` method consume a `Canvas` object. You can post your answer below, if it worked I can accept it. — Ralphilius, Jul 24 '17 at 08:58
just read `android.graphics.drawable.Drawable` documentation — pskink, Jul 24 '17 at 08:59

Jon Goodwin · Accepted Answer · 2017-07-30T16:52:17.650

This code may help:

    int width = 100;//initialise
    int height= 100;//initialise

    //you say "The background is matched screen size in the question"
    width  = mBackground.getWidth();//  get width  of screen
    height = mBackground.getHeight();// get height of screen

    //Create bitmap for canvas        
    Bitmap tiledBitmap = Bitmap.createBitmap( width , height, Bitmap.Config.ARGB_8888 );//create a Bipmap for us to save later
    canvas = new Canvas( tiledBitmap );//associate bitmap to canvas

    bitmapDrawable.setBounds( 0, 0, width , height );//set bounds
    bitmapDrawable.draw( canvas );//draw tiled image to canvas ( and so Bitmap )

    //tiledBitmap now contains your tiled image

Get tiled bitmap / repeated bitmap

1 Answers1