疫情随着这个春天的到来已悄然离去，你还记得填写问卷调查的那个时候么
话不多少，这篇文章要实现的就是一个问卷调查列表，即 Listview 嵌套 Listview 实现 checkbox 多选以及反选清除已选项
思路就是定义一个 Map 集合用于存储每一个 checkbox 条目的选中状态。默认 checkbox 状态都为 false,遍历集合，选中哪条就把该条目的位置添加进集合，并设置状态为true,未选设置状态为 false，如果集合不为空设置checkbox 状态为 true ，反之为 false
implementation 'com.google.code.gson:gson:2.2.2'
新建一个DataJson 类 ，把接口数据定义为一个不可改变的字符串JSON
public class DataJson {
public static final String JSON = "{\n" +
" \"data\": {\n" +
" \"problems\": [\n" +
" {\n" +
" \"bodydetails\": [\n" +
" {\n" +
" \"ConditionName\": \"发热\",\n" +
" \"ConditionValue\": \"10\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"干咳\",\n" +
" \"ConditionValue\": \"11\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"腹泻\",\n" +
" \"ConditionValue\": \"12\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"身体无异常\",\n" +
" \"ConditionValue\": \"100\"\n" +
" }\n" +
" ],\n" +
" \"problem\": \"身体是否出现以下状况：\"\n" +
" },\n" +
" {\n" +
" \"bodydetails\": [\n" +
" {\n" +
" \"ConditionName\": \"划伤\",\n" +
" \"ConditionValue\": \"10\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"水泡\",\n" +
" \"ConditionValue\": \"11\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"疱疹\",\n" +
" \"ConditionValue\": \"12\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"手掌无异常\",\n" +
" \"ConditionValue\": \"100\"\n" +
" }\n" +
" ],\n" +
" \"problem\": \"手掌是否出现以下状况：\"\n" +
" },\n" +
" {\n" +
" \"bodydetails\": [\n" +
" {\n" +
" \"ConditionName\": \"口腔溃疡\",\n" +
" \"ConditionValue\": \"10\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"牙龈出血\",\n" +
" \"ConditionValue\": \"11\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"扁导体发炎\",\n" +
" \"ConditionValue\": \"12\"\n" +
" },\n" +
" {\n" +
" \"ConditionName\": \"口腔无异常\",\n" +
" \"ConditionValue\": \"100\"\n" +
" }\n" +
" ],\n" +
" \"problem\": \"口腔是否出现以下状况：\"\n" +
" }\n" +
" ]\n" +
" },\n" +
" \"msg\": \"获取成功\",\n" +
" \"status\": \"Y\"\n" +
"}";
}
当拿到服务器返回的数据的时候，我也是一脸懵，为什么每一项的状态码都是一样的？这怎么区分存储呢，所以嘛跟后台打好关系还是比较重要的，不然你会做很多工作，这里就自己定义实体类加 flag 标识吧，创建 ResponseBean 实体类 并新增 flag 字段
public class ResponseBean {
/**
* status : Y
* msg : 获取成功
* data : {"problems":[{"bodydetails":[{"ConditionName":"发热","ConditionValue":"10"},{"ConditionName":"干咳","ConditionValue":"11"},{"ConditionName":"腹泻","ConditionValue":"12"},{"ConditionName":"身体无异常","ConditionValue":"100"}],"problem":"身体是否出现以下状况："},{"bodydetails":[{"ConditionName":"划伤","ConditionValue":"10"},{"ConditionName":"水泡","ConditionValue":"11"},{"ConditionName":"疱疹","ConditionValue":"12"},{"ConditionName":"手掌无异常","ConditionValue":"100"}],"problem":"手掌是否出现以下状况："},{"bodydetails":[{"ConditionName":"口腔溃疡","ConditionValue":"10"},{"ConditionName":"牙龈出血","ConditionValue":"11"},{"ConditionName":"扁导体发炎","ConditionValue":"12"},{"ConditionName":"口腔无异常","ConditionValue":"100"}],"problem":"口腔是否出现以下状况："}]}
*/
private String status;
private String msg;
private DataBean data;
@Override
public String toString() {
return "ResponseBean{" +
"status='" + status + '\'' +
", msg='" + msg + '\'' +
", data=" + data +
'}';
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public DataBean getData() {
return data;
}
public void setData(DataBean data) {
this.data = data;
}
public static class DataBean {
private List<ProblemsBean> problems;
@Override
public String toString() {
return "DataBean{" +
"problems=" + problems +
'}';
}
public List<ProblemsBean> getProblems() {
return problems;
}
public void setProblems(List<ProblemsBean> problems) {
this.problems = problems;
}
public static class ProblemsBean {
/**
* bodydetails : [{"ConditionName":"发热","ConditionValue":"10"},{"ConditionName":"干咳","ConditionValue":"11"},{"ConditionName":"腹泻","ConditionValue":"12"},{"ConditionName":"身体无异常","ConditionValue":"100"}]
* problem : 身体是否出现以下状况：
*/
private String problem;
private List<BodydetailsBean> bodydetails;
@Override
public String toString() {
return "ProblemsBean{" +
"problem='" + problem + '\'' +
", bodydetails=" + bodydetails +
'}';
}
public String getProblem() {
return problem;
}
public void setProblem(String problem) {
this.problem = problem;
}
public List<BodydetailsBean> getBodydetails() {
return bodydetails;
}
public void setBodydetails(List<BodydetailsBean> bodydetails) {
this.bodydetails = bodydetails;
}
public static class BodydetailsBean {
/**
* ConditionName : 发热
* ConditionValue : 10
*/
private String ConditionName;
private String ConditionValue;
private String flag;
@Override
public String toString() {
return "BodydetailsBean{" +
"ConditionName='" + ConditionName + '\'' +
", ConditionValue='" + ConditionValue + '\'' +
", flag=" + flag +
'}';
}
public String getConditionName() {
return ConditionName;
}
public void setConditionName(String ConditionName) {
this.ConditionName = ConditionName;
}
public String getConditionValue() {
return ConditionValue;
}
public void setConditionValue(String ConditionValue) {
this.ConditionValue = ConditionValue;
}
public String getFlag() {
return flag;
}
public void setFlag(String flag) {
this.flag = flag;
}
}
}
}
}因为接口数据为数组嵌套一个数组，如下图
这里需要解决 Listview 嵌套中 item 点击失效 或 显示不全 问题
需要自定义一个 CustomListView 类继承父类 ListView 并重写 onMeasure 方法，进行重定义高度
public class CustomListView extends ListView {
public CustomListView(Context context) {
super(context);
}
public CustomListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomListView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int newHeightSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, newHeightSpec);
}
}接下来创建标题 item 的 xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/item_title_tv"
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_marginTop="30dp"
android:gravity="center_vertical"
android:paddingStart="10dp"
android:paddingLeft="10dp"
android:paddingEnd="10dp"
android:paddingRight="10dp"
android:text="标题"
android:textColor="#000000" />
<com.wyc.checkbox.CustomListView
android:id="@+id/item_list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:divider="@null"
android:dividerHeight="0dp"
android:overScrollMode="never" />
</LinearLayout>在创建子选项 item 的 xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:padding="10dp"
android:layout_height="100dp">
<TextView
android:id="@+id/item_check_tv"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="标题"
android:textColor="#000000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@id/item_check_box"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<CheckBox
android:id="@+id/item_check_box"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBaseline_toBaselineOf="@id/item_check_tv"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@id/item_check_tv" />
</android.support.constraint.ConstraintLayout>接下来就是外层标题适配器，创建一个 ResponseAdapter 类并继承 BaseAdapter ,然后这里定义一个 Map 数组 用来存储选项状态码，默认所有为 false
然后再判断选项列表是否为空，不为空就加载选项适配器
public class ResponseAdapter extends BaseAdapter {
private List<ResponseBean.DataBean.ProblemsBean> mDataList;
private Map<String, Boolean> mCheckMap = new HashMap<>();
public ResponseAdapter(List<ResponseBean.DataBean.ProblemsBean> dataList) {
this.mDataList = dataList;
for (ResponseBean.DataBean.ProblemsBean bean : mDataList) {
for (ResponseBean.DataBean.ProblemsBean.BodydetailsBean bodydetail : bean.getBodydetails()) {
mCheckMap.put(bodydetail.getFlag(), false);
}
}
}
@Override
public int getCount() {
return mDataList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public Map<String, Boolean> getCheckMap() {
return mCheckMap;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list_response, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
ResponseBean.DataBean.ProblemsBean problemsBean = mDataList.get(position);
holder.itemTitleTv.setText(problemsBean.getProblem());
List<ResponseBean.DataBean.ProblemsBean.BodydetailsBean> bodyList = problemsBean.getBodydetails();
if (bodyList != null && bodyList.size() > 0) {
holder.itemListView.setVisibility(View.VISIBLE);
holder.itemListView.setAdapter(new ProblemAdapter(problemsBean.getBodydetails(), mCheckMap));
} else {
holder.itemListView.setVisibility(View.GONE);
}
return convertView;
}
final static class ViewHolder {
TextView itemTitleTv;
ListView itemListView;
public ViewHolder(View view) {
itemListView = view.findViewById(R.id.item_list_view);
itemTitleTv = view.findViewById(R.id.item_title_tv);
}
}
}接下来就是子选项的adapter ,创建 ProblemAdapter 类并继承 BaseAdapter , 顶一个 Map 数组 ，然后在 getView 当中 为 checkbox 添加 改变监听事件 ，选择就存储为 true 反之为 false , 并及时刷新适配器， 接下来就是获取选项状态码，这里是从大项开始刷选 ，状态值是自己定义的接下来会说的，默认存储都为 false ，
public class ProblemAdapter extends BaseAdapter {
public static final String TAG = "ProblemAdapter";
private List<ResponseBean.DataBean.ProblemsBean.BodydetailsBean> mBodyDetails;
private Map<String, Boolean> mCheckMap;
public ProblemAdapter(List<ResponseBean.DataBean.ProblemsBean.BodydetailsBean> bodydetails, Map<String, Boolean> checkMap) {
this.mBodyDetails = bodydetails;
this.mCheckMap = checkMap;
Log.d(TAG, "===============================");
for (String integer : mCheckMap.keySet()) {
Log.d(TAG, "key= " + integer + " , value = " + mCheckMap.get(integer));
}
}
public Map<String, Boolean> getCheckMap() {
return mCheckMap;
}
@Override
public int getCount() {
return mBodyDetails.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_check_view, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.itemCheckTv.setText(mBodyDetails.get(position).getConditionName());
final ResponseBean.DataBean.ProblemsBean.BodydetailsBean bean = mBodyDetails.get(position);
holder.itemCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
mCheckMap.put(bean.getFlag(), true);
} else {
mCheckMap.put(bean.getFlag(), false);
}
notifyDataSetChanged();
}
});
if (mCheckMap.get("1100")) {
mCheckMap.put("110", false);
mCheckMap.put("111", false);
mCheckMap.put("112", false);
notifyDataSetChanged();
}
if (mCheckMap.get("2100")) {
mCheckMap.put("210", false);
mCheckMap.put("211", false);
mCheckMap.put("212", false);
notifyDataSetChanged();
}
if (mCheckMap.get("3100")) {
mCheckMap.put("310", false);
mCheckMap.put("311", false);
mCheckMap.put("312", false);
notifyDataSetChanged();
}
if (mCheckMap != null && mCheckMap.get(bean.getFlag())) {
holder.itemCheckBox.setChecked(true);
} else {
holder.itemCheckBox.setChecked(false);
}
return convertView;
}
final static class ViewHolder {
TextView itemCheckTv;
CheckBox itemCheckBox;
public ViewHolder(View view) {
itemCheckTv = view.findViewById(R.id.item_check_tv);
itemCheckBox = view.findViewById(R.id.item_check_box);
}
}
}最后就是 MainActivity 进行资源整合，先看布局，布局就是一个标题栏加一个 Listview 标题栏的 已选择项 点击方便自己测试用
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="选择效果"
android:textColor="#000000" />
<TextView
android:id="@+id/checkBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:layout_marginEnd="10dp"
android:text="已选择项"
android:textColor="#ff0000" />
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#f2f2f2" />
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@null"
android:dividerHeight="0dp"
android:overScrollMode="never" />
</LinearLayout>最后就是主要整合代码，主要就是 初始化时 准备下本地数据，这里自定义状态 flag 标识，循环列表通过 i 进行递增，用于判断复选框是否选中，最后加到 mDataBeanList 中，
public class MainActivity extends AppCompatActivity {
public static final String TAG = "Log_MainActivity";
private List<ResponseBean.DataBean.ProblemsBean> mDataBeanList = new ArrayList<>();
private ListView mListView;
private ResponseAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initData();
mListView = findViewById(R.id.listView);
mAdapter = new ResponseAdapter(mDataBeanList);
mListView.setAdapter(mAdapter);
TextView checkBtn = findViewById(R.id.checkBtn);
checkBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Map<String, List<String>> map = checkItem();
Log.d(TAG, "check map = " + map.toString());
}
});
}
/**
* 获取已选项目
*
* @return
*/
private Map<String, List<String>> checkItem() {
Map<String, List<String>> map = new HashMap<>();
if (mAdapter != null) {
Map<String, Boolean> checkMap = mAdapter.getCheckMap();
for (ResponseBean.DataBean.ProblemsBean problemsBean : mDataBeanList) {
List<String> problemList = new ArrayList<>();
for (ResponseBean.DataBean.ProblemsBean.BodydetailsBean bodydetail : problemsBean.getBodydetails()) {
if (checkMap.get(bodydetail.getFlag())) {
problemList.add(bodydetail.getConditionValue() + "--------------" + bodydetail.getConditionName());
}
}
map.put(problemsBean.getProblem(), problemList);
}
}
return map;
}
private void initData() {
ResponseBean responseBean = new Gson().fromJson(DataJson.JSON, ResponseBean.class);
Log.d(TAG, "responseBean = " + responseBean.toString());
List<ResponseBean.DataBean.ProblemsBean> dataList = responseBean.getData().getProblems();
//准话本地数据，自定义下标，用于判断复选框是否选中
for (int i = 0; i < dataList.size(); i++) {
ResponseBean.DataBean.ProblemsBean problemsBean = dataList.get(i);
List<ResponseBean.DataBean.ProblemsBean.BodydetailsBean> beanList = new ArrayList<>();
for (int j = 0; j < problemsBean.getBodydetails().size(); j++) {
//数据转化
ResponseBean.DataBean.ProblemsBean.BodydetailsBean bean = problemsBean.getBodydetails().get(j);
ResponseBean.DataBean.ProblemsBean.BodydetailsBean newBean = new ResponseBean.DataBean.ProblemsBean.BodydetailsBean();
newBean.setConditionValue(bean.getConditionValue());
newBean.setConditionName(bean.getConditionName());
//自定义下标
newBean.setFlag((i + 1) + bean.getConditionValue());
beanList.add(newBean);
}
problemsBean.setBodydetails(beanList);
mDataBeanList.add(problemsBean);
}
Log.d(TAG, "data bean list = " + mDataBeanList.toString());
}
}运行程序，敲完收工 代码后续上传，如有疑问请评论留言第一时间回复