RecyclerView实现列表数据选择操作 Android使用RecyclerView实现列表数据选择操作
迟做总比不做强 人气:0想了解Android使用RecyclerView实现列表数据选择操作的相关内容吗,迟做总比不做强在本文为您仔细讲解RecyclerView实现列表数据选择操作 的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Android,RecyclerView,CheckBox,列表数据,下面大家一起来学习吧。
这些时间做安卓盒子项目,因为安卓电视的显示器比较大,所以一个界面显示 很多数据 ,最多的时候,一个Actvity中用到了好几个RecyclerView。
在RecyclerView中实现Item选中处理时,发现用CheckBox的OnCheckedChangeListener监听事件时,会达不到预期,所以用了OnClickListener来实现。
主界面代码:
public class CheckRecyclerViewActivity extends AppCompatActivity implements CheckAdapter.CheckItemListener { //适配器 private CheckAdapter mCheckAdapter; //列表 private RecyclerView check_rcy; //全选操作 private CheckBox check_all_cb; //列表数据 private List<CheckBean> dataArray; //选中后的数据 private List<CheckBean> checkedList; private boolean isSelectAll; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_check_recyclerview); checkedList = new ArrayList<>(); initDatas(); initViews(); } private void initViews() { check_rcy = (RecyclerView) findViewById(R.id.check_rcy); check_all_cb = (CheckBox) findViewById(R.id.check_all_cb); LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); check_rcy.setLayoutManager(linearLayoutManager); mCheckAdapter = new CheckAdapter(this, dataArray, this); check_rcy.setAdapter(mCheckAdapter); //如果使用CheckBox的OnCheckedChangeListener事件,则选中事件会有一些意想不到的结果,欢迎体验 //在列表Item中的CheckBox也一样的效果 check_all_cb.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { isSelectAll = !isSelectAll; checkedList.clear(); if (isSelectAll) {//全选处理 checkedList.addAll(dataArray); } for (CheckBean checkBean : dataArray) { checkBean.setChecked(isSelectAll); } mCheckAdapter.notifyDataSetChanged(); } }); } private void initDatas() { dataArray = new ArrayList<>(); for (int i = 0; i < 20; i++) { CheckBean bean = new CheckBean(); bean.setOrder(String.valueOf(i + 1)); bean.setName("名称_" + i); bean.setContent("第" + i + "条内容"); bean.setTime(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())); dataArray.add(bean); } } @Override public void itemChecked(CheckBean checkBean, boolean isChecked) { //处理Item点击选中回调事件 if (isChecked) { //选中处理 if (!checkedList.contains(checkBean)) { checkedList.add(checkBean); } } else { //未选中处理 if (checkedList.contains(checkBean)) { checkedList.remove(checkBean); } } //判断列表数据是否全部选中 if (checkedList.size() == dataArray.size()) { check_all_cb.setChecked(true); } else { check_all_cb.setChecked(false); } } }
列表数据适配器:
public class CheckAdapter extends RecyclerView.Adapter<CheckAdapter.ViewHolder> { private Context mContext; private List<CheckBean> mDatas; private CheckItemListener mCheckListener; public CheckAdapter(Context mContext, List<CheckBean> mDatas, CheckItemListener mCheckListener) { this.mContext = mContext; this.mDatas = mDatas; this.mCheckListener = mCheckListener; } @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = LayoutInflater.from(mContext).inflate(R.layout.check_recyclerview_item, parent, false); ViewHolder viewHolder = new ViewHolder(view); return viewHolder; } @Override public void onBindViewHolder(final ViewHolder holder, final int position) { final CheckBean bean = mDatas.get(position); holder.item_order_tv.setText(bean.getOrder()); holder.item_name_tv.setText(bean.getName()); holder.item_content_tv.setText(bean.getContent()); holder.item_time_tv.setText(bean.getTime()); holder.item_cb.setChecked(bean.isChecked()); //点击实现选择功能,当然可以把点击事件放在item_cb对应的CheckBox上,只是焦点范围较小 holder.item_content_ll.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { bean.setChecked(!bean.isChecked()); holder.item_cb.setChecked(bean.isChecked()); if (null != mCheckListener) { mCheckListener.itemChecked(bean, holder.item_cb.isChecked()); } notifyDataSetChanged(); } }); } @Override public int getItemCount() { return mDatas.size(); } public class ViewHolder extends RecyclerView.ViewHolder { //序号 private TextView item_order_tv; //选择 private CheckBox item_cb; //整个条目 private LinearLayout item_content_ll; //名称 TextView item_name_tv; //内容 TextView item_content_tv; //时间 private TextView item_time_tv; public ViewHolder(View itemView) { super(itemView); item_order_tv = (TextView) itemView.findViewById(R.id.item_order_tv); item_cb = (CheckBox) itemView.findViewById(R.id.item_cb); item_name_tv = (TextView) itemView.findViewById(R.id.item_name_tv); item_content_tv = (TextView) itemView.findViewById(R.id.item_content_tv); item_time_tv = (TextView) itemView.findViewById(R.id.item_time_tv); item_content_ll = (LinearLayout) itemView.findViewById(R.id.item_content_ll); } } public interface CheckItemListener { void itemChecked(CheckBean checkBean, boolean isChecked); } }
测试数据实体BEAN:
public class CheckBean implements Serializable { private String order; private String name; private String content; private String time; private boolean isChecked; public String getOrder() { return order; } public void setOrder(String order) { this.order = order; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public String getTime() { return time; } public void setTime(String time) { this.time = time; } public boolean isChecked() { return isChecked; } public void setChecked(boolean checked) { isChecked = checked; } }
主界面布局文件:
<?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="match_parent" android:layout_margin="10dp" android:background="@drawable/drawable_white_round_bg" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="20dp" android:orientation="horizontal"> <TextView android:layout_width="40dp" android:layout_height="match_parent" android:text="序号" android:layout_marginLeft="10dp" android:textSize="12sp" android:textColor="#333333" android:gravity="center" /> <CheckBox android:id="@+id/check_all_cb" android:layout_width="12dp" android:layout_gravity="center" android:button="@null" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_height="12dp" android:background="@drawable/drawable_cb_selector" /> <TextView android:layout_width="wrap_content" android:layout_height="match_parent" android:text="名称" android:layout_marginLeft="10dp" android:textSize="12sp" android:textColor="#333333" android:gravity="center" /> <TextView android:layout_width="100dp" android:layout_height="match_parent" android:text="内容" android:layout_marginLeft="10dp" android:textSize="12sp" android:textColor="#333333" android:gravity="center" /> <TextView android:layout_width="80dp" android:layout_height="match_parent" android:text="时间" android:layout_marginLeft="10dp" android:textSize="12sp" android:textColor="#333333" android:gravity="center" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1px" android:background="#bcbcbc"></View> <android.support.v7.widget.RecyclerView android:id="@+id/check_rcy" android:layout_width="match_parent" android:layout_height="wrap_content"></android.support.v7.widget.RecyclerView> </LinearLayout>
列表Item布局:
<?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"> <LinearLayout android:id="@+id/item_content_ll" android:layout_width="match_parent" android:layout_height="40dp" android:orientation="horizontal"> <TextView android:id="@+id/item_order_tv" android:layout_width="40dp" android:layout_height="match_parent" android:layout_marginLeft="10dp" android:textSize="15sp" android:textColor="#333333" android:gravity="center" /> <CheckBox android:id="@+id/item_cb" android:layout_width="20dp" android:layout_gravity="center" android:button="@null" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_height="20dp" android:background="@drawable/drawable_cb_selector" /> <TextView android:id="@+id/item_name_tv" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_marginLeft="10dp" android:textSize="15sp" android:textColor="#333333" android:gravity="center" /> <TextView android:id="@+id/item_content_tv" android:layout_width="100dp" android:layout_height="match_parent" android:layout_marginLeft="10dp" android:textSize="15sp" android:textColor="#333333" android:gravity="center" /> <TextView android:id="@+id/item_time_tv" android:layout_width="120dp" android:layout_height="match_parent" android:layout_marginLeft="10dp" android:textSize="15sp" android:textColor="#333333" android:gravity="center" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1px" android:background="#bcbcbc"/> </LinearLayout>
界面布局是随意写的,请根据实际情况调整。上丑图:
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