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移动开发平台 android 扫码组件能否自定义相机比例

项目中用到扫码组件，现在camera默认采样为全屏，现在需要将其绘制在一个3:4的view中，导致预览时被拉伸。求问需要怎样调节扫码时的camera的比例

Android 自定义最大宽度，高度, 宽高比例 Layout

前言这篇博客主要介绍的是怎样自定义一个可以指定最大宽度，高度，以及宽高比的 Layout。原理其实很简单，就是通过重写 onMeasure 方法，重新制定 MeasureSpec。使用说明常用的自定义属性<attr name="ml_maxWidth" format="dimension".....

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android 动态设置控件宽度，比例等

左边是手机上面的效果，右边是华为pad上面的效果。中间合同价竣工结算价这个分类要求显示4个，所以这个里面item的宽度是动态计算的。不然无法满足要求。计算的思路是用（屏幕宽度-2*中间linearlayout的 margin-2*中间linearlayout的padding）/4就是每个i...

Android开发 - 掌握ConstraintLayout（十）按比例设置视图大小

有时候在布局界面的时候，UI要求某个View或者某张图片按比例显示，以适应不同的屏幕分辨率。通常我们时通过自定义View或者引入第三方的库来解决。现在我们既然已经使用了ConstraintLayout，它本身就支持这样的按比例设置View大小的功能。下面我们来介绍如何使用：首先我们在布局中添加...

安卓阴影最佳解决方案，原生CardView修改阴影颜色和上下阴影比例

CardviewFix 简书地址 [https://www.jianshu.com/p/8c8b2708bdb4] 原生的CardView虽然好，但是公司UI设计必须修改阴影颜色这个库是基于google官方库，所以基本属性相同，增加三个属性，暂时只支持xml配置，分别是`startColor`，`...

Android ConstraintLayout按比例缩放View

Android ConstraintLayout按比例缩放View 关键点有两个，第一，使用Android ConstraintLayout的layout_constraintDimensionRatio属性，设置宽高比缩放比例，宽:高。第二，恒定宽和高，另外一个方向就会按照比例缩放。 <an...

android图片等比例缩放填充屏幕

在ImageView的t同事设置两个属性  android:adjustViewBounds="true" android:scaleType="fitXY" 本文转自 netcorner 博客园博客，原文链接： http://www.cnblogs.com/netcorner/...

Android ImageView的scaleType（图片比例类型）属性与adjustViewBounds（调整视图边界）属性

本文转载自[Android ImageView的scaleType（图片比例类型）属性与adjustViewBounds（调整视图边界）属性]并做了排版的修改(http://www.cnblogs.com/xzbc/p/5098347.html) Android ImageView的scaleTyp...

Android横竖屏切换View设置不同尺寸或等比例缩放的自定义View的onMeasure解决方案（2）

Android横竖屏切换View设置不同尺寸或等比例缩放的自定义View的onMeasure解决方案（2）附录文章1以xml布局文件方式实现了一个view在横竖屏切换时候的大小尺寸缩放，实现这种需求，也可以使用自定义View的onMeasure方法实现。比如，写一个自定义的ScaleRelativ...

Android横竖屏切换View设置不同尺寸或等比例缩放的XML解决方案

Android横竖屏切换View设置不同尺寸或等比例缩放的XML解决方案在一些应用中，涉及到横竖屏切换，View要切换成不同大小比例尺寸。为解决这种开发场景，有多种解决方案，比如可以重写View，实现横竖切换在onMesure或者此类View的回调方法里面重新测量重新绘制View的尺寸大小。还有可...

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