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
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