// Temp is the root view that was found in the xml final View temp = createViewFromTag(root, name, attrs, false); ViewGroup.LayoutParams params = null; if (root != null) { if (DEBUG) { System.out.println("Creating params from root: " + root); }
小程序中经常会遇到要生成图片的需求,图片一般会加上用户的头像和昵称之类的,头像只需要把腾讯域名添加到request和download列表中,使用wx.getImageInfo()就可以缓存到本地,成功的回调再添加进canvas中生成图片. 如果要文字在某个位置居中,canvas中文字怎么根据文字长短不一实现锚点在文字中心位置呢? var txtWidth=canvas.measureText(this.nickName).width能获取到在canvas中文字的宽度,找到文字的居中x位置减去tx
原文 Demos of each of the methods below by clicking here. Horizontal centering with css is rather easy. When the element to be centered is an inline element we use text-align center on its parent. When the element is a block level element we give width
一. layoutparams是什么LayoutParams继承于Android.View.ViewGroup.LayoutParamsLayoutParams只是ViewGroup的一个内部类 view中的layoutparams属性是父控件的layoutparamslayoutparams能约束view的宽高和位置ViewGroup里边的LayoutParams类是 base class 基类,每个不同的ViewGroup都有自己的LayoutParams子类, 而且不同,比如LinearL