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
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<? 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
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<? 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。
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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。
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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。
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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。
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< 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服务器之家。
原文链接:https://blog.csdn.net/wj5ryf78/article/details/94618197