Android积木之图片的生成和保存

 private fun generationPic(callback: (response: List) -> Unit) {        Observable.just(selectList)                .map {                    val response = ArrayList()                    for (i in 0 until selectList.size) {                        val outMetrics = DisplayMetrics()                        windowManager.defaultDisplay.getMetrics(outMetrics)                        val widthPixels = outMetrics.widthPixels                        val heightPixels = widthPixels*814/375                        var shareOrderView = ShareOrderView(this)                        shareOrderView.orderItem=selectList[i].orderItem                        layoutView(shareOrderView,widthPixels,heightPixels)                        var bitmap = loadBitmapFromView(shareOrderView)                        if (bitmap == null) {                            continue                        }                        val joinPath = Config.SAVE_REAL_PATH + "share_order_" + System.currentTimeMillis()                        FileUtil.saveImageToSDCard(bitmap, 100, joinPath)                        response.add(ScreenShotResponse(joinPath, System.currentTimeMillis(), widthPixels.toLong(), heightPixels.toLong()))                    }                    response                }//                .toList(shareOrderView)                .subscribeOn(RxUtils.getSchedulerIO())                .observeOn(AndroidSchedulers.mainThread())                .subscribe({                    callback(it)                }, {                    it.printStackTrace()                })    }private fun loadBitmapFromView(v: View): Bitmap {        var w = v.width        var h = v.height        var bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888)        var c = Canvas(bmp)        c.drawColor(Color.WHITE)        v.layout(0, 0, w, h)        v.draw(c)        return bmp    } private fun layoutView(v: View, width: Int, height: Int) {        // 整个View的大小 参数是左上角 和右下角的坐标        v.layout(0, 0, width, height)        val measuredWidth = View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY)        val measuredHeight = View.MeasureSpec.makeMeasureSpec(height, View.MeasureSpec.EXACTLY)        /** 当然，measure完后，并不会实际改变View的尺寸，需要调用View.layout方法去进行布局。         * 按示例调用layout函数后，View的大小将会变成你想要设置成的大小。         */        v.measure(measuredWidth, measuredHeight)        v.layout(0, 0, v.measuredWidth, v.measuredHeight)    }
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