Android shape和selector 结合使用实例代码
shape和selector是android ui设计中经常用到的,比如我们要自定义一个圆角button,点击button有些效果的变化,就要用到shape和selector。可以这样说,shape和selector在美化控件中的作用是至关重要的。
1.shape
简介
作用:xml中定义的几何形状
位置:res/drawable/文件的名称.xml
使用的方法:
java代码中:r.drawable.文件的名称
xml中:android:background="@drawable/文件的名称"
属性:
<shape> android:shape=["rectangle" | "oval" | "line" | "ring"]
其中rectagle矩形,oval椭圆,line水平直线,ring环形
<shape>中子节点的常用属性:
<gradient> 渐变
android:startcolor 起始颜色
android:endcolor 结束颜色
android:angle 渐变角度,0从上到下,90表示从左到右,数值为45的整数倍默认为0;
android:type 渐变的样式 liner线性渐变 radial环形渐变 sweep
<solid > 填充
android:color 填充的颜色
<stroke > 描边
android:width 描边的宽度
android:color 描边的颜色
android:dashwidth 表示'-'横线的宽度
android:dashgap 表示'-'横线之间的距离
<corners > 圆角
android:radius 圆角的半径 值越大角越圆
android:toprightradius 右上圆角半径
android:bottomleftradius 右下圆角角半径
android:topleftradius 左上圆角半径
android:bottomrightradius 左下圆角半径
2.selector
简介
位置:res/drawable/文件的名称.xml
使用的方法:
java代码中:r.drawable.文件的名称
xml中:android:background="@drawable/文件的名称"
<?xml version="1.0" encoding="utf-8" ?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- 默认时的背景图片--> <item android:drawable="@drawable/pic1" /> <!-- 没有焦点时的背景图片 --> <item android:state_window_focused="false" android:drawable="@drawable/pic_blue" /> <!-- 非触摸模式下获得焦点并单击时的背景图片 --> <item android:state_focused="true" android:state_pressed="true" android:drawable= "@drawable/pic_red" /> <!-- 触摸模式下单击时的背景图片--> <item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/pic_pink" /> <!--选中时的图片背景--> <item android:state_selected="true" android:drawable="@drawable/pic_orange" /> <!--获得焦点时的图片背景--> <item android:state_focused="true" android:drawable="@drawable/pic_green" /> </selector>
先看看这个例子的结构:
selector.xml
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true"> <shape> <gradient android:angle="270" android:endcolor="#99bd4c" android:startcolor="#a5d245" /> <size android:height="60dp" android:width="320dp" /> <corners android:radius="8dp" /> </shape> </item> <item android:state_pressed="true"> <shape> <gradient android:angle="270" android:endcolor="#99bd4c" android:startcolor="#a5d245"/> <size android:height="60dp" android:width="320dp" /> <corners android:radius="8dp" /> </shape> </item> <item> <shape> <gradient android:angle="270" android:endcolor="#a8c3b0" android:startcolor="#c6cfce" /> <size android:height="60dp" android:width="320dp" /> <corners android:radius="8dp" /> </shape> </item> </selector>
list_item.xml
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/selector" > <imageview android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_marginleft="20dp" /> <textview android:text="data" android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_vertical" android:layout_marginleft="20dp" android:layout_margintop="20dp" android:textsize="14sp" android:textstyle="bold" android:textcolor="@color/black" > </textview> </linearlayout>
main.xml
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#253853" > <listview android:id="@+id/list" android:layout_width="match_parent" android:layout_height="match_parent" android:cachecolorhint="#00000000" android:divider="#2a4562" android:dividerheight="3px" android:listselector="#264365" android:drawselectorontop="false" > </listview> </linearlayout>
colors.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <color name="white">#ffffffff</color> <color name="transparency">#00000000</color> <color name="title_bg">#1c86ee</color> <color name="end_color">#a0cfef83</color> <color name="black">#464646</color> </resources>
mainactivity.java
package com.lingdududu.customlist; import java.util.arraylist; import java.util.hashmap; import xb.customlist.r; import android.r.array; import android.app.activity; import android.os.bundle; import android.widget.arrayadapter; import android.widget.listview; import android.widget.simpleadapter; public class mainactivity extends activity { listview list; string data[] = new string[]{ "china","uk","usa","japan","german","canada","et","narotu" }; /** called when the activity is first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); list =(listview) findviewbyid(r.id.list); simpleadapter adapter = new simpleadapter(this, getdata(), r.layout.list_item, new string[]{"title","img"}, new int[]{r.id.title,r.id.img}); list.setadapter(adapter); } private arraylist<hashmap<string, object>> getdata() { arraylist<hashmap<string, object>> dlist = new arraylist<hashmap<string,object>>(); for(int i =0;i<data.length;i++){ hashmap<string, object>map = new hashmap<string, object>(); map.put("title", data[i]); map.put("img", r.drawable.item_left2); dlist.add(map); } return dlist; } }
效果图:
以上就是对 android shape和selector 的资料整理,有开发这块的同学可以看下。