高仿android通讯录--右边字母排序功能
最近都没有时间来更新我的博客，主要是在项目中遇到一些比较棘手的问题需要解决，今天我就把我解决的难题写了个Demo出来与大家一起分享，最终达到火种通讯录联系人界面的效果。
在这次代码编写当中，我主要用到了来显示友好提示
在对数组进行排序的时候，我们可以用 .sort()方法轻松实现按字母顺序排序。
另外在实现点击字母后让滚动到以该字母开头的相应位置效果时，我们要用到如下方法：
一个是通过 int ([] a, key) 方法来获得该字母出现的Item在中的位置，
另一个就是 list.(); 来让List指向对应位置的Item。
当你对这些方法都有所了解了以后，下面我们开始设计我们的Demo。
我们先建立一个名为的工程，然后就是代码部分了：
第一步，在res/的main.xml中我们来设置中显示上下层显示的效果，其实就是一个相对布局。
Java代码
"":="":="":=""> :id="@+id/list":="" :="" /> :id="@+id/" :="30dip":="":t="true":p="true":ght="true":="@null"/>
第二步，我们在中建一个.xml，这是用来通过显示友好提示的。
Java代码
"" :="70sp" :="#" :="70dip" :="70dip" :="10dip" :="" />
第三步，是.xml用来设置中Items的布局。
Java代码
xmlns:="":="":="":=""> "@+id/" :="" :="" :="20dip" :="10dip" :="@/":="gone"> :="":="":=""> :id="@+id/order":="":="60dip":="15dip":="left":="2"/> :id="@+id/":="":="":="60dip":="15dip":="2"/>
第四步，是一个.xml用来显示右边覆盖在上的的Items
Java代码
xmlns:="":="":="":="20dip">
第五步，我们建一个名为的类，然后就是实现功能的代码了，里面有非常详尽的注释，大家慢慢看吧。
Java代码
.; .util.; .util.; .app.; ..; ..; .os.; .os.; .view.; .view.View; .view.; .view.; .view..; ..; ..; ..; ..; ..; ..; ..; ...; ...; /** *@.罗 * */,{ /**.*/; ; ; erlay;//用来放在中显示提示字符r; ; e;//滚动的状态,; @(tate){ super.(); (R..main); =().from(this).(R..,null); //默认设置为不可见。
.(View.); //设置 .=.(., .,.., //设置为无焦点状态 ..|.., //半透明效果 .); =()(.); .(,lp); =(); =(); .sort(,.ER);//大小写不敏感=(); for(inti=0;i=0?[idx].(0):''; =[].(0); //将小写字符转换为大写字符 =.(); =.(); if(!=){ .w.(View.); .w.(.()); }else{ //此段代码不可缺：实例化一个后，会被多次赋值并且只有最后一次赋值的是正确.w.(View.GONE); } ; } } (,, ,){ //以中间的为标准项来显示。
.(.([+(>>1)].(0)).()); } (,){ this.=; if(==..){ .(); //提示延迟1.5s再消失 .(,1500); }else{ .(View.); } } k(,,, ){ =(()view).().(); .(s); .(View.); .(); //提示延迟1.5s再消失 .(,1500); =(,s);//接收返回值if(!=-1){ .(View.);//防止点击出现的与滚动出现的冲突list.();//让List指向对应位置的Item} } //将选中的py与的首字符进行匹配并返回对应字符串在数组中的位置arch([],){ for(inti=0;iif(s.(""+[i].(0))){//不区分大小写; } } -1; } (){ super.(); //将删除。
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