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。

以上是 Android使用RecyclerView实现投票系统 的全部内容, 来源链接: utcz.com/p/242203.html

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