动态壁纸：更改方向并调用onSurfaceChanged时，画布位图仅绘制屏幕的一半

如何解决动态壁纸：更改方向并调用onSurfaceChanged时，画布位图仅绘制屏幕的一半

我正在实现视差滚动壁纸。每当更改方向并调用onSurafceChanged时，对Canvas DrawBitmap的下一次调用只会在屏幕的一半上绘制。需要花更多的时间从onOffsetChanged调用另一个绘制周期来修复它。 这是呼叫流程。

OnSurfaceChanged-> OnOffsetChanged-> Draw（）->（仅绘制半个屏幕）-> OnOffsetChanged（手动移动屏幕后）-> Draw（）->（立即屏幕完全绘制）

这是我的密码

override fun onSurfaceChanged(holder: SurfaceHolder,format: Int,width: Int,height: Int){
            super.onSurfaceChanged(holder,format,width,height)
            this.width = width
            this.height = height
            handler.removeCallbacks(drawRunner)
            handler.post(drawRunner)
        }
        override fun onOffsetsChanged(
            xOffset: Float,yOffset: Float,xOffsetStep: Float,yOffsetStep: Float,xPixelOffset: Int,yPixelOffset: Int
        ) {
            super.onOffsetsChanged(
                xOffset,yOffset,xOffsetStep,yOffsetStep,xPixelOffset,yPixelOffset
            )
            xOff = xOffset
            handler.removeCallbacks(drawRunner)
            handler.post(drawRunner)
        }

        private fun draw() {
            val holder = surfaceHolder
            var canvas: Canvas? = null
            try {
                canvas = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                    holder.lockHardwareCanvas()
                } else {
                    holder.lockCanvas()
                }
            } catch (e: Exception){}
            if(canvas!=null) {
                val dst:Rect = Rect(0,this.width,this.height)
                calcSrcDimen()
                canvas.drawBitmap(layer1,src1,dst,null)
                canvas.drawBitmap(layer2,src2,null)
                canvas.drawBitmap(layer3,src3,null)
                canvas.drawBitmap(layer4,src4,null)
                canvas.drawBitmap(layer5,src5,null)
                canvas.drawBitmap(layer6,src6,null)
                canvas.drawBitmap(layer7,src7,null)
            }
            if (canvas != null) {
                try {
                    holder.unlockCanvasAndPost(canvas)
                } catch (e: Exception){}
            }
            handler.removeCallbacks(drawRunner)
        }

以下是屏幕截图

和