SurfaceView drawBitmap take too long, the longest time consuming 200ms

Question

I am using Surface to show bitmap from JNI, to show a video, this is my code :

       SurfaceHolder holder = surfaceView.getHolder();
       while(true) {
            if(getBitmap() == null) {
                continue;
            }
            Canvas canvas = holder.lockCanvas();
            canvas.drawBitmap(getBitmap(), matrix, null);
            if(viewInterface == null) {
                break;
            }
            holder.unlockCanvasAndPost(canvas);
            setBitmap(null);
        }

I went to calculate the time spent in each method，I found that the method

//longest time consuming 71ms
holder.lockCanvas(); 

//longest time consuming 50ms
canvas.drawBitmap(getBitmap(), matrix, null);

//longest time consuming 111ms
holder.unlockCanvasAndPost(canvas);

I don't know where the problem is, what happens next time to drawBitmap for so long time