经验总结-RecyclerView列表中获取每个item中已经选择的CheckBox值

最近在做一个公司的项目—平板广告机，相当于一个超大手机里面打开一个App。需求中有一个功能是从服务器获取广告机可能出现的问题数据，Android开发人员用列表显示，这些数据是给公司的检修人员看的。需求：点击页面上的一个按钮，在页面上弹出一个包含列表的PopuWindow，列表的每一项中只含有一个CheckBox控件，如果选中相应的CheckBox控件，那么当检修人员点击提交按钮时，会把每个选中的CheckBox值传给服务器。需求已经很清楚了，那我就写一个简单易懂的demo重现我们刚才的需求：上项目列表上布局文件1.activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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"
tools:context="com.xgr.checkbox.MainActivity">

<Button
android:id="@+id/btn_skip_this"
android:layout_width="match_parent"
android:layout_height="48dp"
android:text="跳转"/>

<RelativeLayout
android:id="@+id/rl_bottom"
android:layout_width="match_parent"
android:layout_height="64dp"
android:layout_alignParentBottom="true"
android:background="#cccccc">

<ImageView
android:id="@+id/iv_show"
android:layout_width="64dp"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_marginLeft="12dp"
android:src="@drawable/ic_launcher_round"/>

<ImageView
android:id="@+id/iv_dismiss"
android:layout_width="64dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_marginRight="12dp"
android:src="@drawable/ic_launcher_round"/>
</RelativeLayout>

</RelativeLayout>

2.popuwindow_repair.xml

<?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"
android:background="#FFFFFF">

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/btn_submit"
android:padding="5dp">

<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_centerInParent="true"/>
</RelativeLayout>

<Button
android:id="@+id/btn_submit"
android:layout_width="64dp"
android:layout_height="48dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_gravity="bottom"
android:layout_marginBottom="12dp"
android:text="提交"/>

</RelativeLayout>

3.item_repair.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical"><CheckBoxandroid:id="@+id/checkbox_problem"android:layout_centerInParent="true"android:text="问题检修"android:layout_width="wrap_content"android:layout_height="48dp"/></RelativeLayout>

上java代码

1.MainActivity

package com.xgr.checkbox;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.Gravity;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.PopupWindow;import android.widget.RelativeLayout;public class MainActivity extends Activity implements View.OnClickListener {private ImageView ivShow;private ImageView ivDismiss;private RelativeLayout rlBottom;private Button btnSkip;private PopupWindow mPopupWindow;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);setViews();setListeners();}private void setViews() {ivShow = (ImageView) findViewById(R.id.iv_show);ivDismiss = (ImageView) findViewById(R.id.iv_dismiss);rlBottom= (RelativeLayout) findViewById(R.id.rl_bottom);btnSkip= (Button) findViewById(R.id.btn_skip_this);}private void setListeners() {ivShow.setOnClickListener(this);ivDismiss.setOnClickListener(this);btnSkip.setOnClickListener(this);}@Overridepublic void onClick(View view) {switch (view.getId()) {case R.id.iv_show:if(mPopupWindow!=null){return;}mPopupWindow=new CustomPopuWindow(this,R.layout.popuwindow_repair,0);mPopupWindow.showAtLocation(rlBottom,0,0, Gravity.NO_GRAVITY);break;case R.id.iv_dismiss:if(mPopupWindow!=null){mPopupWindow.dismiss();mPopupWindow=null;return;}break;case R.id.btn_skip_this:Intent intent=new Intent(this,MainActivity.class);startActivity(intent);finish();break;}}}

2.BeanAdapter.class

package com.xgr.checkbox;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.CheckBox;import android.widget.CompoundButton;import java.util.ArrayList;import java.util.List;/*** Created by xgr on 2017/11/25.*/public class BeanAdapter extends RecyclerView.Adapter<BeanAdapter.ViewHolder> {private Context context;private List<JavaBean> list;private List<String> checklist;public List<String> getChecklist() {return checklist;}public void setChecklist(List<String> checklist) {this.checklist = checklist;}public BeanAdapter(Context context, List<JavaBean> list) {this.context = context;this.list = list;checklist=new ArrayList<>();}@Overridepublic ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {View view = LayoutInflater.from(context).inflate(R.layout.item_repair, parent, false);ViewHolder holder = new ViewHolder(view);return holder;}@Overridepublic void onBindViewHolder(final ViewHolder holder, int position) {JavaBean bean = list.get(position);holder.checkBox.setText(bean.getName());holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {if(isChecked){checklist.add(holder.checkBox.getText().toString());}}});}@Overridepublic int getItemCount() {return list.size();}public class ViewHolder extends RecyclerView.ViewHolder {CheckBox checkBox;public ViewHolder(View view) {super(view);checkBox = (CheckBox) view.findViewById(R.id.checkbox_problem);}}}

3.JavaBean.class

package com.xgr.checkbox;import java.io.Serializable;/*** Created by xgr on 2017/11/24.*/public class JavaBean implements Serializable {private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}}

4.CustomPopuWindow.class

package com.xgr.checkbox;import android.content.Context;import android.graphics.drawable.ColorDrawable;import android.os.Handler;import android.os.Message;import android.support.v7.widget.GridLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.Button;import android.widget.PopupWindow;import android.widget.Toast;import java.util.ArrayList;import java.util.List;/*** Created by xgr on 2017/11/25.*/public class CustomPopuWindow extends PopupWindow {private Context context;private View mPopuWindow;private RecyclerView mRecyclerView;private List<JavaBean> list = new ArrayList<>();private BeanAdapter adapter;private Button btnSubmit;private Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case 0:break;}}};public CustomPopuWindow(Context context, int resLayout, int anchorHeight) {super(context);this.context = context;initResLayout(resLayout);setPopuWindow(anchorHeight);initData(resLayout);}private void initResLayout(int resLayout) {mPopuWindow = LayoutInflater.from(context).inflate(resLayout, null);}private void setPopuWindow(int anchorHeight) {this.setContentView(mPopuWindow);this.setWidth(ViewGroup.LayoutParams.MATCH_PARENT);this.setHeight(800);// 实例化一个ColorDrawable颜色为半透明ColorDrawable dw = new ColorDrawable(0000000000);// 点back键和其他地方使其消失,设置了这个才能触发OnDismisslistener ，设置其他控件变化等操作this.setBackgroundDrawable(dw);}private void initData(int resLayout) {//报修弹窗布局if (resLayout == R.layout.popuwindow_repair) {initData();setViews();setAdapter();setListeners();}}private void initData() {for (int i = 0; i < 20; i++) {JavaBean bean = new JavaBean();bean.setName("视频卡顿");list.add(bean);}}private void setViews() {mRecyclerView = (RecyclerView) mPopuWindow.findViewById(R.id.recycler_view);btnSubmit = (Button) mPopuWindow.findViewById(R.id.btn_submit);}private void setListeners() {btnSubmit.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {submitData();}});}private void submitData() {if(adapter.getChecklist().size()<=0){Toast.makeText(context,"您还未选择报修原因",Toast.LENGTH_LONG).show();return;}StringBuilder sb=new StringBuilder();for(int i=0;i<adapter.getChecklist().size();i++){String name=adapter.getChecklist().get(i);sb.append(name+",");}String param=sb.toString().substring(0,sb.length()-1);//联网上传数据//成功后handler.send.....在activity中取消弹窗，也可直接dismiss()，但是直接dismiss()//并没有销毁PopupWindow实例this.dismiss();}private void setAdapter() {int number = 0;//用于指定列数，目的：让数据居中显示if (list.size() > 1) {number = 2;//当数据大于1条时，列表分两列显示} else {number = 1;//当数据小于2条时，列表为一列显示，且数据居中}GridLayoutManager manager = new GridLayoutManager(context, number);mRecyclerView.setLayoutManager(manager);adapter = new BeanAdapter(context, list);mRecyclerView.setAdapter(adapter);}}

ok，代码一股脑上完了，就是一个简单的demo，不是很难，但是很精髓。我也不过多的讲解了，大家试一试吧