For details about surfaceview background initialization

=============== Problem description ====================

It basically comes from a lot of code circulating on the Internet that draws a sine. At the beginning, the entire background is black. The following code can be used to change the background when drawing a picture.

Canvas canvas = sfh. lockCanvas (null); canvas. drawColor (Color. BLUE); // clear the canvas sfh. unlockCanvasAndPost (Canvas );

However, I want the software to run surfaceview to have a background color, and the background color will not overwrite my picture. I have added a background image in the layout, but it will block my picture.

I tried to draw the background in onCreate, but I couldn't get the canvas.

@ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); sfv = (SurfaceView) this. findViewById (R. id. surfaceView01); sfh = sfv. getHolder (); // The canvas is not available yet. The Canvas is null canvas = sfh. lockCanvas (null); canvas. drawColor (Color. BLUE); sfh. unlockCanvasAndPost (canvas );}

How can I initialize the background?

============= Solution 1 ======================

Learning, please share it with the landlord

For details about surfaceview background initialization