Android(安卓)布局学习

16lz 2022-07-24

ViewGroup	Width/Height ,Padding/margin
FrameLayout	gravity
LinearLayout	Orientation/horizontal/vertical weight
RelativeLayout	alignBaseline/(Left/Top/Right/Bottom) Start/End alignParent center Horizontal/Vertical/InParent below/above/toLeftOf/toRightOf/toStartOf/toEndOf

LinearLayout代码设置weight LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1.0f);
linearLayout.setLayoutParams(lp); Android布局优化（非常好的一篇文章） http://www.infoq.com/cn/articles/android-optimise-layout selector几种状态 state_pressed
state_focused
state_selected TextView常用属性 android:ellipsize="none"
android:singleLine="true"
android:textColor=""
android:textSize=""

一、RelativeLayout布局属性与 include、merge简单总结

// 当前视图顶部，底部，左侧，右侧与其他视图间填充区域

[html] view plain copy print ?

android:layout_marginTop
android:layout_marginBottom
android:layout_marginLeft
android:layout_marginRight

java代码设置

[java] view plain copy print ?

RelativeLayout.LayoutParamslayoutParams=newRelativeLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
//单位是px
layoutParams.topMargin=66;
layoutParams.bottomMargin=66;
layoutParams.leftMargin=66;
layoutParams.rightMargin=66;

// 当前视图内顶部，底部，左侧，右侧填充区域 (非RelativeLayout属性)

[html] view plain copy print ?

android:paddingTop
android:paddingBottom
android:paddingLeft
android:paddingRight

// 在指定ID视图上面，下面，左侧，右侧

[html] view plain copy print ?

android:layout_above
android:layout_below
android:layout_toLeftOf
android:layout_toRightOf

Java代码设置

[java] view plain copy print ?

RelativeLayout.LayoutParamslayoutParams=newRelativeLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
layoutParams.addRule(RelativeLayout.ABOVE,R.id.viewId);
layoutParams.addRule(RelativeLayout.BELOW,R.id.viewId);
layoutParams.addRule(RelativeLayout.LEFT_OF,R.id.viewId);
layoutParams.addRule(RelativeLayout.RIGHT_OF,R.id.viewId);

// 与制定ID视图baseLine，顶部，底部，左侧，右侧边缘对齐

[html] view plain copy print ?

android:layout_alignBaseline
android:layout_alignTop
android:layout_alignBottom
android:layout_alignLeft
android:layout_alignRight

Java代码设置

[java] view plain copy print ?

RelativeLayout.LayoutParamslayoutParams=newRelativeLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
layoutParams.addRule(RelativeLayout.ALIGN_BASELINE,R.id.viewId);
layoutParams.addRule(RelativeLayout.ALIGN_TOP,R.id.viewId);
layoutParams.addRule(RelativeLayout.ALIGN_BOTTOM,R.id.viewId);
layoutParams.addRule(RelativeLayout.ALIGN_LEFT,R.id.viewId);
layoutParams.addRule(RelativeLayout.ALIGN_RIGHT,R.id.viewId);

// 与父视图顶部，底部，左侧，右侧边缘对齐

[html] view plain copy print ?

android:layout_alignParentTop
android:layout_alignParentBottom
android:layout_alignParentLeft
android:layout_alignParentRight

Java代码设置

[java] view plain copy print ?

RelativeLayout.LayoutParamslayoutParams=newRelativeLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

// 横向居中，纵向居中，针对与父视图剧中

[html] view plain copy print ?

android:layout_centerHorizontal
android:layout_centerVertical
android:layout_centerInParent

Java代码设置

[java] view plain copy print ?

RelativeLayout.LayoutParamslayoutParams=newRelativeLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
layoutParams.addRule(RelativeLayout.CENTER_VERTICAL);
layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT);

** Include 与 mege标签

参考资料：

Re-using Layouts with <include/>

Romain Guy Android Layout Tricks #3: Optimize, Part 1

** ViewGroup相关配置

1.clipChildren

android:clipChildren setClipChildren(boolean)Defines whether a child is limited to draw inside of its bounds or not.
定义是否限制子视图在它的范围内进行绘制。默认是true

2.clipToPadding
android:clipToPadding setClipToPadding(boolean)Defines whether the ViewGroup will clip its drawing surface so as to exclude the padding area.
定义ViewGroup是否将剪切它的绘制界面并排除padding区域。默认是true

参考资料：

ViewGroup API

* 配置文件属性与Java代码方法对应 android:gravity
android:layout_gravity

android:layout_gravity="right"
lp.gravity = Gravity.RIGHT;
button.setGravity(Gravity.CENTER); * View属性，子视图与父控件perssed 等状态保持一致
xml配置： android:duplicateParentState 代码： setDuplicateParentStateEnabled * ViewGroup属性，父视图与子视图pressed状态保持一致 xml配置： android:addStatesFromChildren 代码： setAddStatesFromChildren

设置EditText光标位置

http://www.cnblogs.com/nanhuchongzi/archive/2012/04/17/2444451.html

**margin与padding的区别？

一个属于视图内，一个属于试图外 margin之后，如果视图隐藏，margin不会隐藏因为margin是视图外的部分 padding会算如总宽吗？会算入总宽 ** 动态修改宽高
view.getLayoutParams().width = widthValue;

Android进阶练习-改善布局性能
http://blog.csdn.net/tu_bingbing/article/details/8654990

**TextView 显示两行，其余用....替换
android:maxLines="2"
android:ellipsize="end"

values/ids.xml
<resources>
<item type="id" name="idname" />
</resources>
view.setId(R.id. idname);

***

布局XML Schema
有哪些属性，是在XML Schema定义，可以在http://www.w3school.com.cn/schema/schema_intro.asp了解Schema更多知识。
Android 布局XML Schema在什么地方？查询补漏

布局在Java中的对应关系 TypeArray

原文地址：http://blog.csdn.net/love_world_/article/details/8426935

2013-12-29 添加gravity、layout_gravity、duplicateParentState

2014-04-10 添加布局XML Schema

更多相关文章

随机推荐