Android使用RecyclerView实现投票系统

本文实例为大家分享了android投票系统的具体代码，供大家参考，具体内容如下

一、创建一个fragment_vote_list.xml用来显示投票的主页面

（1）标题栏使用toolbar
（2）投票区域可以滑动，使用recyclerview实现

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:clickable="true"
 android:background="@color/backgroundcolorwhite">
 <linearlayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@color/backgroundcolorwhite"
  android:orientation="vertical">
  <android.support.v7.widget.toolbar
   android:id="@+id/vote_list_toolbar"
   android:layout_width="match_parent"
   android:layout_height="@dimen/toolbarheight"
   android:background="@color/backgroundcolorwhite"
   app:contentinsetstart="0dp">
   <relativelayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <button
     android:id="@+id/vote_list_back_btn"
     android:layout_width="@dimen/titlebarbackwidth"
     android:layout_height="@dimen/titlebarbackheight"
     android:layout_margin="@dimen/margin_min"
     android:layout_centervertical="true"
     android:background="@drawable/titlebar_back"
     android:layout_marginleft="@dimen/padding_20"
     />
    <textview
     android:id="@+id/vote_list_title_tv"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_centerinparent="true"
     android:layout_gravity="center_vertical"
     android:text="投票"
     android:textcolor="@color/textcolor_28282d"
     android:textsize="@dimen/textsizemax"
     android:textstyle="bold"/>
   </relativelayout>
  </android.support.v7.widget.toolbar>

  <android.support.v7.widget.recyclerview
   android:id="@+id/vote_list_recycleview"
   android:layout_width="match_parent"
   android:layout_height="match_parent">
  </android.support.v7.widget.recyclerview>
 </linearlayout>
</relativelayout>

注：界面字体大小以及控件宽度自行调整即可，使用recyclerview首先需要在项目的build.gradle中添加相应的依赖库才行。添加:implementation ‘com.android.support:recyclerview-v7:24.2.1'

界面效果：

二、创建一个item_vote.xml用来显示投票的具体内容

（1）主布局使用linearlayout实现，里面添加一个textview用来显示投票的问题，使用checkbox作为投票的多选框。
（2）将当前的item加载到投票的主页面中

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" 
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="@color/backgroundcolorwhite"
 >
 <textview
  android:id="@+id/item_vote_question_tv"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="1.请问你支持哪一个决议?"
  android:textcolor="@color/black"
  android:textsize="@dimen/item_vote_question"
  android:layout_marginleft="@dimen/padding_20" />
 <linearlayout
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@color/backgroundcolorwhite"
  android:orientation="vertical"
  android:layout_margin="@dimen/padding_20">
  <checkbox
   android:id="@+id/item_vote_answer1_cb"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="aaaaaa"
   android:textcolor="@color/black"
   android:textsize="@dimen/item_vote_answer" />
  <checkbox
   android:id="@+id/item_vote_answer2_cb"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="bbbbbbb"
   android:textcolor="@color/black"
   android:textsize="@dimen/item_vote_answer" />
  <checkbox
   android:id="@+id/item_vote_answer3_cb"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="bccccc"
   android:textcolor="@color/black"
   android:textsize="@dimen/item_vote_answer" />

 </linearlayout>
 
</linearlayout>

界面效果：

三、创建一个投票信息实体类作为适配器的适配类型,新建voteinfo.java类。

public class voteinfo {
 private string questionitem;
 private string[] answeritems;
 public voteinfo(string questionitem,string[] answeritems){
  this.questionitem=questionitem;
  this.answeritems=answeritems;

 }
 public string getquestionitem(){
  return questionitem;
 }
 public string[] getansweritems(){
  return answeritems;
 }
}

四、接下来需要为recyclerview准备一个适配器，新建voteinfoadapter.java，让这个适配器继承自recyclerview.adapter，并将泛型指定为voteinfoadapter.viewholder。其中，viewholder是我们在voteinfoadapter中定义的一个内部类。

public class voteinfoadapter extends recyclerview.adapter<voteinfoadapter.viewholder> {

 private list<voteinfo> mvoteinfolist;
 @override
 public viewholder oncreateviewholder(@nonnull viewgroup parent, int viewtype) {
  view view= layoutinflater.from(parent.getcontext()).inflate(r.layout.item_vote,parent,false);
  viewholder holder=new viewholder(view);
  return holder;
 }

 @override
 public void onbindviewholder(@nonnull viewholder holder, int position) {
  voteinfo voteinfo=mvoteinfolist.get(position);
  holder.questionitem.settext(voteinfo.getquestionitem());
  holder.answeritem_1.settext(voteinfo.getansweritems()[0]);
  holder.answeritem_2.settext(voteinfo.getansweritems()[1]);
  holder.answeritem_3.settext(voteinfo.getansweritems()[2]);

 }

 @override
 public int getitemcount() {
  return mvoteinfolist.size();
 }

 static class viewholder extends recyclerview.viewholder{
  textview questionitem;
  checkbox answeritem_1;
  checkbox answeritem_2;
  checkbox answeritem_3;
  public viewholder(view itemview) {
   super(itemview);
   questionitem=(textview)itemview.findviewbyid(r.id.item_vote_question_tv);
   answeritem_1=(checkbox)itemview.findviewbyid(r.id.item_vote_answer1_cb);
   answeritem_2=(checkbox)itemview.findviewbyid(r.id.item_vote_answer2_cb);
   answeritem_3=(checkbox)itemview.findviewbyid(r.id.item_vote_answer3_cb);

  }
 }
 public voteinfoadapter(list<voteinfo> voteinfolist){
  mvoteinfolist=voteinfolist;

 }
}

五、适配器已经准备完毕，开始使用recyclerview，新建一个showvoteadapter.java类。

public class showvoteactivity extends baseactivity{
 @bindview(r.id.vote_list_recycleview)
 recyclerview recyclerview;
 private list<voteinfo> voteinfolist=new arraylist<voteinfo>();

 @override
 protected void oncreate(bundle saveinstancestate) {
  super.oncreate(saveinstancestate);
  screenutils.setcontentviewwithorientation(this,
    screenutils.isphone() ? r.layout.fragment_vote_list : r.layout.fragment_vote_list);
  initvoteinfo();
  linearlayoutmanager linearlayoutmanager=new linearlayoutmanager(this);
  recyclerview.setlayoutmanager(linearlayoutmanager);
  voteinfoadapter voteinfoadapter=new voteinfoadapter(voteinfolist);
  recyclerview.setadapter(voteinfoadapter);
 }
 private void initvoteinfo(){
  voteinfo vote1=new voteinfo("1.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote1);
  voteinfo vote2=new voteinfo("2.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote2);
  voteinfo vote3=new voteinfo("3.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote3);
  voteinfo vote4=new voteinfo("4.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote4);
  voteinfo vote5=new voteinfo("5.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote5);
  voteinfo vote6=new voteinfo("6.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote6);
  voteinfo vote7=new voteinfo("7.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote7);
  voteinfo vote8=new voteinfo("8.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote8);
  voteinfo vote9=new voteinfo("9.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote9);
  voteinfo vote10=new voteinfo("10.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote10);
  voteinfo vote11=new voteinfo("11.请问以下哪个答案最佳?",new string[]{"aaaaaa","bbbbbb","cccccc"});
  voteinfolist.add(vote11);

 }
}

六、需要androidmanifest.xml中注册showvoteactivity，才能够正常启动。

<activity
 android:name="com.inpor.fastmeetingcloud.activity.showvoteactivity"
 android:configchanges="keyboardhidden|orientation|screensize"
 android:screenorientation="portrait"
 android:windowsoftinputmode="statealwayshidden|adjustpan" />

七、最终界面效果图

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。