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?","CCCCCC"});
- voteInfoList.add(vote2);
- VoteInfo vote3=new VoteInfo("3.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote3);
- VoteInfo vote4=new VoteInfo("4.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote4);
- VoteInfo vote5=new VoteInfo("5.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote5);
- VoteInfo vote6=new VoteInfo("6.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote6);
- VoteInfo vote7=new VoteInfo("7.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote7);
- VoteInfo vote8=new VoteInfo("8.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote8);
- VoteInfo vote9=new VoteInfo("9.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote9);
- VoteInfo vote10=new VoteInfo("10.请问以下哪个答案最佳?","CCCCCC"});
- voteInfoList.add(vote10);
- VoteInfo vote11=new VoteInfo("11.请问以下哪个答案最佳?","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