前言

今天给大家分享是如何在RecyclerView实现全选，ItemTouchHelper实现侧滑删除,拖拽功能。比较基础。关于RecyclerView的强大，就不多说了。在Android L SDK发布的新API中最有意思的就是RecyclerView 和 CardView了， 按照官方的说法， RecyclerView 一个ListView 的一个更高级更灵活的一个版本， 可以自定义的东西太多了。

效果：

RecyclerView实现全选，ItemTouchHelper实现侧滑删除,拖拽功能

使用RecyclerView，首先我们需要依赖

compile 'com.android.support:recyclerview-v7:23.+'

项目结构:

项目结构

主要是把选择的存储在HashMap记录下来，通知用eventbus发送。下面我们一步一步来实现这种效果.

方法如下

1、我们新建一个MainActivity 布局

public class MainActivity extends Activity {

private RecyclerView recyclerView;

private CheckBox checkbox;

private TextView selected;

private ListAdapter adapter;

private EventBus event;

private boolean isChange = false;

private ArrayList list = new ArrayList<>();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initView();

initData();

}

private void initView() {

event = EventBus.getDefault();

event.register(this);

recyclerView = (RecyclerView) findViewById(R.id.recyclerview);

checkbox = (CheckBox) findViewById(R.id.checkbox);

selected = (TextView) findViewById(R.id.selected);

}

private void initData() {

for (int i = 0; i < 20; i++) {

Book model = new Book();

model.setId(i);

model.setName("商品" + i);

model.setDesc("描述" + i);

list.add(model);

}

adapter = new ListAdapter(list, event);

recyclerView.setHasFixedSize(true);

recyclerView.setAdapter(adapter);

recyclerView.setLayoutManager(new GridLayoutManager(this, 3));

checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

try {

HashMap map = new HashMap();

int count = 0;

if (isChecked) {

isChange = false;

}

for (int i = 0, p = list.size(); i < p; i++) {

if (isChecked) {

map.put(i, true);

count++;

} else {

if (!isChange) {

map.put(i, false);

count = 0;

} else {

map = adapter.getMap();

count = map.size();

}

}

}

selected.setText("已选" + count + "项");

adapter.setMap(map);

} catch (Exception e) {

e.printStackTrace();

}

}

});

adapter.setOnItemClickListener(new ListAdapter.ItemClickListener() {

@Override

public void onItemClick(RecyclerView.ViewHolder holder, int positon) {

Log.e("onItemClick", "" + positon);

}

@Override

public void onItemLongClick(final RecyclerView.ViewHolder holder, final int positon) {

Log.e("onItemLongClick", "" + positon);

}

});

}

public void onEventMainThread(SelectEvent event) {

int size = event.getSize();

if (size < list.size()) {

isChange = true;

checkbox.setChecked(false);

} else {

checkbox.setChecked(true);

isChange = false;

}

selected.setText("已选" + size + "项");

}

@Override

protected void onDestroy() {

super.onDestroy();

event.unregister(this);

}

}

2、我们建一个ListAdapter适配器

public class ListAdapter extends RecyclerView.Adapter {

private List mItems;

private List selected;

public HashMap map;

private EventBus eventBus;

public ListAdapter(List mItems, EventBus eventBus) {

this.mItems = mItems;

this.eventBus = eventBus;

map = new HashMap<>();

selected = new ArrayList<>();

init();

}

private void init() {

if (null == mItems || mItems.size() <= 0) {

return;

}

for (int i = 0, p = mItems.size(); i < p; i++) {

map.put(i, false);

}

}

@Override

public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_main_item, parent, false);

ItemViewHolder itemViewHolder = new ItemViewHolder(view);

return itemViewHolder;

}

@Override

public void onBindViewHolder(final ItemViewHolder holder, final int position) {

if (null == mItems || mItems.size() <= 0) {

return;

}

holder.name.setText(mItems.get(position).getName());

holder.desc.setText(mItems.get(position).getDesc());

holder.checkBox.setTag(new Integer(position));//防止划回来时选中消失

if (map != null) {

((ItemViewHolder) holder).checkBox.setChecked((map.get(position)));

} else {

((ItemViewHolder) holder).checkBox.setChecked(false);

}

holder.checkBox.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

int mFlags = (Integer) view.getTag();

if (map != null) {

if (map.get(position)) {

map.put(position, false);

eventBus.post(new SelectEvent(selected(map)));

} else {

map.put(mFlags, Boolean.TRUE);

eventBus.post(new SelectEvent(selected(map)));

}

}

}

});

holder.itemView.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

mItemClickListener.onItemClick(holder,holder.getAdapterPosition());

}

});

holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {

@Override

public boolean onLongClick(View v) {

mItemClickListener.onItemLongClick(holder,holder.getAdapterPosition());

return true;

}

});

}

private int selected(HashMap map) {

int size = 0;

for (Integer key : map.keySet()) {

if(map.get(key)){

size++;

}

}

return size;

}

@Override

public int getItemCount() {

return mItems == null? 0 :mItems.size();

}

public static class ItemViewHolder extends RecyclerView.ViewHolder{

public final CheckBox checkBox;

public final TextView name;

public final TextView desc;

public ItemViewHolder(View itemView) {

super(itemView);

checkBox = (CheckBox) itemView.findViewById(R.id.checkbox);

name = (TextView) itemView.findViewById(R.id.tv_name);

desc = (TextView) itemView.findViewById(R.id.tv_desc);

}

}

public HashMap getMap() {

return map;

}

public void setMap(HashMap map) {

this.map = map;

notifyDataSetChanged();

}

/**

* 点击事件和长按事件

*/

public interface ItemClickListener{

void onItemClick(RecyclerView.ViewHolder holder , int position);

void onItemLongClick(RecyclerView.ViewHolder holder , int position);

}

private ItemClickListener mItemClickListener;

public void setOnItemClickListener(ItemClickListener listener){

this.mItemClickListener=listener;

}

}

3、我们新建实体Book和SelectEvent

package com.aikaifa.checkall.bean;

public class Book {

private int id;

private String name;

private String desc;

public String getDesc() {

return desc;

}

public void setDesc(String desc) {

this.desc = desc;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public Book() {

}

}

public class SelectEvent {

private int size;

public SelectEvent(int size) {

this.size = size;

}

public int getSize() {

return size;

}

}

4、建立checkbox_selector.xml选中样式

5、建立一个activity_main.xml布局

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="horizontal">

android:id="@+id/checkbox"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:drawablePadding="10dp"

android:text="全选"

android:textColor="#969696"

android:textSize="12sp" />

android:id="@+id/selected"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="10dp"

android:gravity="center_vertical"

android:text="已选0项" />

android:id="@+id/recyclerview"

android:layout_width="match_parent"

android:layout_height="match_parent" />

activity_main_item布局

android:id="@+id/item"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginTop="10dp"

android:clickable="true"

android:focusable="true">

android:id="@+id/rl_app"

android:layout_width="50dp"

android:layout_height="50dp"

android:layout_centerHorizontal="true">

android:id="@+id/iv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@mipmap/ic_launcher" />

android:id="@+id/checkbox"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentRight="true"

android:layout_gravity="center_vertical"

android:button="@drawable/checkbox_selector" />

android:id="@+id/tv_name"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_below="@+id/rl_app"

android:gravity="center"

android:text="name"

android:textColor="#ffffff" />

android:id="@+id/tv_desc"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_below="@+id/tv_name"

android:gravity="center"

android:textColor="#f5f5f5"

android:textSize="9sp" />

这样关于RecyclerView实现全选，ItemTouchHelper实现侧滑删除,拖拽功能就完成了。

示例代码下载：

本地下载：点击这里

总结

以上就是这篇文章的全部内容了，希望本文的内容对各位Android开发者们能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对脚本之家的支持。