Android RecyclerVIew列表使用 (編輯、單選、全選、刪除、動畫效果+附源碼)

前言

眼下都2020年了，你不會還在使用ListView吧？

正文

因爲最近寫的一個項目裏面有關於列表的編輯相關的功能，其實也是類似與騰訊視頻的觀看歷史的列表操作，你可以先嚐試一下，寫這個主要是業務邏輯要清晰，否則你很容易就會陷進去，走死衚衕的。

效果圖如下：

源碼如下：
RecyclerViewUseDemo

迫不及待想要自己運行在AS中的小夥伴可以直接下載或者克隆，打開即可，想了解具體開發流程和詳細的業務邏輯的小夥伴，可以繼續往下看，本章很長，請在流量和時間充足的前提下觀看，如有問題，評論即可，我會盡快解決，多說無益，開搞~

開發

① 新建項目

這一步沒有什麼好說的，但是你也要注意自己的Android Studio和Gradle的版本，我的是3.5.2。點擊項目創建

② 配置build.gradle

第一步
在工程級別的build.gradle文件中的allprojects{} 閉包中添加maven庫

	maven { url "https://jitpack.io" }

第二步
在項目級別的build.gradle文件中的android{}閉包中，配置JDK的版本

	compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

然後在dependencies{}閉包中添加第三方的依賴庫

	//綁定視圖
    implementation 'com.jakewharton:butterknife:10.2.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1'
    //RecyclerView
    implementation 'androidx.recyclerview:recyclerview:1.1.0'
    //下拉刷新
    implementation 'com.scwang.smartrefresh:SmartRefreshLayout:1.1.0-alpha-14'
    //RecyclerView適配器
    implementation 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.22'
    //熱門強大的圖片加載器
    implementation 'com.github.bumptech.glide:glide:4.9.0'

然後右上角 Sync Now，點擊同步你的項目配置文件，同步會下載第三方的庫文件，等待完成進行下一步。

③ 修改佈局

在此之前，爲了增加點擊效果，在res → drawable 下創建rounded_corners.xml文件
代碼如下：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape android:shape="rectangle">
            <solid android:color="#18ffc400"/>
        </shape>
    </item>
    <item android:state_focused="true" android:state_enabled="true">
        <shape android:shape="rectangle">
            <solid android:color="#0f000000"/>
        </shape>
    </item>
</selector>

然後在res下新建一個drawable-v21的文件夾，在文件夾中創建bg_white.xml文件，代碼如下：

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="#20000000"
    android:drawable="@drawable/rounded_corners"/>

在drawable文件下再創建一個shape_blue_bg_5.xml
代碼如下：

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="5dp"/>
    <solid android:color="#101B53"/>
</shape>

然後是修改values文件夾下的colors.xml文件，修改原來的並增加幾個顏色,

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#1F2B5D</color>
    <color name="colorPrimaryDark">#1F2B5D</color>
    <color name="colorAccent">#D81B60</color>
    <color name="default_color">#48558C</color>
    <color name="selected_color">#009FE8</color>
    <color name="app_color">#1F2B5D</color>
    <color name="app_bg_color">#020C49</color>
    <color name="white">#FFFFFF</color>
    <color name="gray">#8A96A3</color>
    <color name="yellow">#F39700</color>

</resources>

再修改一下styles.xml文件

佈局中會用到下面的圖片
icon_normal.png

icon_choose_selected.png

icon_choose_default.png

修改activity_main.xml文件，修改後如下圖所示

代碼如下，複製粘貼即可：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/app_bg_color"
    android:fitsSystemWindows="true"
    tools:context=".MainActivity">


    <!--頭部-->
    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="RecyclerView Demo"
            android:textColor="@color/white"
            android:textSize="18sp" />

        <TextView
            android:id="@+id/tv_edit"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:layout_marginRight="8dp"
            android:padding="8dp"
            android:text="編輯"
            android:textColor="@color/white"
            android:textSize="16sp" />
    </androidx.appcompat.widget.Toolbar>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/toolbar"
        android:layout_above="@+id/lay_bottom">
        <!--無數據時的佈局-->
        <LinearLayout
            android:id="@+id/rv_normal_show"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:orientation="vertical">

            <ImageView
                android:layout_width="264dp"
                android:layout_height="140dp"
                android:background="@mipmap/icon_normal" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/dp_10"
                android:text="空空如也"
                android:textColor="@color/gray"
                android:textSize="18sp" />
        </LinearLayout>

        <!--沒有數據時，下拉重新添加數據-->
        <com.scwang.smartrefresh.layout.SmartRefreshLayout
            android:id="@+id/refresh"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            <!--展示數據的列表-->
            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/rv"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:padding="12dp"
                android:visibility="gone" />
        </com.scwang.smartrefresh.layout.SmartRefreshLayout>

    </RelativeLayout>

    <!--底部-->
    <LinearLayout
        android:id="@+id/lay_bottom"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:background="@color/colorPrimary"
        android:orientation="horizontal"
        android:visibility="gone">

        <TextView
            android:id="@+id/tv_check_all"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:foreground="@drawable/bg_white"
            android:gravity="center"
            android:text="全選"
            android:textColor="@color/white"
            android:textSize="@dimen/sp_14" />

        <View
            android:layout_width="1dp"
            android:layout_height="match_parent"
            android:layout_marginTop="12dp"
            android:layout_marginBottom="12dp"
            android:background="@color/app_bg_color" />

        <TextView
            android:id="@+id/tv_delete"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:foreground="@drawable/bg_white"
            android:gravity="center"
            android:text="刪除"
            android:textColor="@color/yellow"
            android:textSize="14sp" />
    </LinearLayout>

</RelativeLayout>

然後是創建一個數據實體DataResponse.java

代碼如下，複製粘貼即可：

package com.llw.recyclerviewusedemo;

import java.util.List;

/**
 * 數據實體
 */
public class DataResponse {


    /**
     * data : [{"_id":"5e959250808d6d2fe6b56eda","author":"鳶媛","category":"Girl","createdAt":"2020-05-25 08:00:00","desc":"與其安慰自己平凡可貴，\n不如拼盡全力活得漂亮。 \u200b \u200b\u200b\u200b\u200b","images":["http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2"],"likeCounts":0,"publishedAt":"2020-05-25 08:00:00","stars":1,"title":"第96期","type":"Girl","url":"http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2","views":131},{"_id":"5e95923f808d6d2fe6b56ed8","author":"鳶媛","category":"Girl","createdAt":"2020-05-24 08:00:00","desc":"這世界總有人在笨拙地愛着你，想把全部的溫柔都給你。 \u200b\u200b\u200b\u200b","images":["http://gank.io/images/dc75cbde1d98448183e2f9514b4d1320"],"likeCounts":0,"publishedAt":"2020-05-24 08:00:00","stars":1,"title":"第95期","type":"Girl","url":"http://gank.io/images/dc75cbde1d98448183e2f9514b4d1320","views":133},{"_id":"5e95922e808d6d2fe6b56ed6","author":"鳶媛","category":"Girl","createdAt":"2020-05-23 08:00:00","desc":"陪伴本來就是這世界上最了不起的安慰\u200b。","images":["http://gank.io/images/6b2efa591564475fb8bc32291fb0007c"],"likeCounts":0,"publishedAt":"2020-05-23 08:00:00","stars":1,"title":"第94期","type":"Girl","url":"http://gank.io/images/6b2efa591564475fb8bc32291fb0007c","views":135},{"_id":"5e959200ee6ba981da2af34d","author":"鳶媛","category":"Girl","createdAt":"2020-05-22 08:00:00","desc":"長不過執念，短不過善變。","images":["http://gank.io/images/d6bba8cf5b8c40f9ad229844475e9149"],"likeCounts":0,"publishedAt":"2020-05-22 08:00:00","stars":1,"title":"第93期","type":"Girl","url":"http://gank.io/images/d6bba8cf5b8c40f9ad229844475e9149","views":192},{"_id":"5e9591dcee6ba981da2af34b","author":"鳶媛","category":"Girl","createdAt":"2020-05-21 08:00:00","desc":"無論多麼艱難的現在，終會翻篇。\n朝未來大步向前吧，別喪，別止步。","images":["http://gank.io/images/9fa43020cf724c69842eec3e13f6d21c"],"likeCounts":1,"publishedAt":"2020-05-21 08:00:00","stars":1,"title":"第92期","type":"Girl","url":"http://gank.io/images/9fa43020cf724c69842eec3e13f6d21c","views":176},{"_id":"5e9591c60bd5529b54e712af","author":"鳶媛","category":"Girl","createdAt":"2020-05-20 08:00:00","desc":"希望下一次，能喜歡上一個也喜歡自己的人 \u200b\u200b\u200b\u200b。","images":["http://gank.io/images/d237f507bf1946d2b0976e581f8aab9b"],"likeCounts":0,"publishedAt":"2020-05-20 08:00:00","stars":1,"title":"第91期","type":"Girl","url":"http://gank.io/images/d237f507bf1946d2b0976e581f8aab9b","views":180},{"_id":"5e9591b6808d6d2fe6b56ed5","author":"鳶媛","category":"Girl","createdAt":"2020-05-19 08:00:00","desc":"這個世界上，\n有些人有多冷漠，\n有些人就有多溫暖，\n希望你總會遇到那些溫暖對你的人。","images":["http://gank.io/images/25d3e3db2c1248bb917c09dc4f50a46f"],"likeCounts":0,"publishedAt":"2020-05-19 08:00:00","stars":1,"title":"第90期","type":"Girl","url":"http://gank.io/images/25d3e3db2c1248bb917c09dc4f50a46f","views":255},{"_id":"5e9591a2ee6ba981da2af34a","author":"鳶媛","category":"Girl","createdAt":"2020-05-18 08:00:00","desc":"以前對你的喜歡，\n是見你，念你，陪伴你。\n現在對你的喜歡，\n是不問，不看，不叨擾。","images":["http://gank.io/images/19c99c447e0a40a6b3ff89951957cfb1"],"likeCounts":0,"publishedAt":"2020-05-18 08:00:00","stars":1,"title":"第89期","type":"Girl","url":"http://gank.io/images/19c99c447e0a40a6b3ff89951957cfb1","views":240},{"_id":"5e959197808d6d2fe6b56ed4","author":"鳶媛","category":"Girl","createdAt":"2020-05-17 08:00:00","desc":"只要結局是喜劇，過程你要我怎麼哭都行，幸福可以來的慢一些，\n只要它是真的，如果最後能在一起，晚點我真的無所謂的。","images":["http://gank.io/images/f0c192e3e335400db8a709a07a891b2e"],"likeCounts":0,"publishedAt":"2020-05-17 08:00:00","stars":1,"title":"第88期","type":"Girl","url":"http://gank.io/images/f0c192e3e335400db8a709a07a891b2e","views":275},{"_id":"5e95915f808d6d2fe6b56ed3","author":"鳶媛","category":"Girl","createdAt":"2020-05-16 08:00:00","desc":"若不是情深似海，思念又怎會氾濫成災。","images":["http://gank.io/images/bdb35e4b3c0045c799cc7a494a3db3e0"],"likeCounts":0,"publishedAt":"2020-05-16 08:00:00","stars":1,"title":"第87期","type":"Girl","url":"http://gank.io/images/bdb35e4b3c0045c799cc7a494a3db3e0","views":437}]
     * page : 1
     * page_count : 10
     * status : 100
     * total_counts : 96
     */

    private int page;
    private int page_count;
    private int status;
    private int total_counts;
    private List<DataBean> data;

    public int getPage() {
        return page;
    }

    public void setPage(int page) {
        this.page = page;
    }

    public int getPage_count() {
        return page_count;
    }

    public void setPage_count(int page_count) {
        this.page_count = page_count;
    }

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public int getTotal_counts() {
        return total_counts;
    }

    public void setTotal_counts(int total_counts) {
        this.total_counts = total_counts;
    }

    public List<DataBean> getData() {
        return data;
    }

    public void setData(List<DataBean> data) {
        this.data = data;
    }

    public static class DataBean {
        /**
         * _id : 5e959250808d6d2fe6b56eda
         * author : 鳶媛
         * category : Girl
         * createdAt : 2020-05-25 08:00:00
         * desc : 與其安慰自己平凡可貴，
         不如拼盡全力活得漂亮。 ​ ​​​​
         * images : ["http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2"]
         * likeCounts : 0
         * publishedAt : 2020-05-25 08:00:00
         * stars : 1
         * title : 第96期
         * type : Girl
         * url : http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2
         * views : 131
         */

        private String _id;
        private String author;
        private String category;
        private String createdAt;
        private String desc;
        private int likeCounts;
        private String publishedAt;
        private int stars;
        private String title;
        private String type;
        private String url;
        private int views;
        private List<String> images;
        private boolean select = false;

        public String get_id() {
            return _id;
        }

        public void set_id(String _id) {
            this._id = _id;
        }

        public String getAuthor() {
            return author;
        }

        public void setAuthor(String author) {
            this.author = author;
        }

        public String getCategory() {
            return category;
        }

        public void setCategory(String category) {
            this.category = category;
        }

        public String getCreatedAt() {
            return createdAt;
        }

        public void setCreatedAt(String createdAt) {
            this.createdAt = createdAt;
        }

        public String getDesc() {
            return desc;
        }

        public void setDesc(String desc) {
            this.desc = desc;
        }

        public int getLikeCounts() {
            return likeCounts;
        }

        public void setLikeCounts(int likeCounts) {
            this.likeCounts = likeCounts;
        }

        public String getPublishedAt() {
            return publishedAt;
        }

        public void setPublishedAt(String publishedAt) {
            this.publishedAt = publishedAt;
        }

        public int getStars() {
            return stars;
        }

        public void setStars(int stars) {
            this.stars = stars;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public String getType() {
            return type;
        }

        public void setType(String type) {
            this.type = type;
        }

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public int getViews() {
            return views;
        }

        public void setViews(int views) {
            this.views = views;
        }

        public List<String> getImages() {
            return images;
        }

        public void setImages(List<String> images) {
            this.images = images;
        }

        public boolean isSelect() {
            return select;
        }

        public void setSelect(boolean select) {
            this.select = select;
        }
    }
}

再創建一個JsonData.java，存放用於轉換的JSON數據

代碼如下，複製粘貼即可：

package com.llw.recyclerviewusedemo;

public class JsonData {
    public static String JSON = "{\"data\":[{\"_id\":\"5e959250808d6d2fe6b56eda\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-25 08:00:00\",\"desc\":\"\\u4e0e\\u5176\\u5b89\\u6170\\u81ea\\u5df1\\u5e73\\u51e1\\u53ef\\u8d35\\uff0c\\n\\u4e0d\\u5982\\u62fc\\u5c3d\\u5168\\u529b\\u6d3b\\u5f97\\u6f02\\u4eae\\u3002 \\u200b \\u200b\\u200b\\u200b\\u200b\",\"images\":[\"http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-25 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c96\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/f4f6d68bf30147e1bdd4ddbc6ad7c2a2\",\"views\":131},{\"_id\":\"5e95923f808d6d2fe6b56ed8\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-24 08:00:00\",\"desc\":\"\\u8fd9\\u4e16\\u754c\\u603b\\u6709\\u4eba\\u5728\\u7b28\\u62d9\\u5730\\u7231\\u7740\\u4f60\\uff0c\\u60f3\\u628a\\u5168\\u90e8\\u7684\\u6e29\\u67d4\\u90fd\\u7ed9\\u4f60\\u3002 \\u200b\\u200b\\u200b\\u200b\",\"images\":[\"http://gank.io/images/dc75cbde1d98448183e2f9514b4d1320\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-24 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c95\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/dc75cbde1d98448183e2f9514b4d1320\",\"views\":133},{\"_id\":\"5e95922e808d6d2fe6b56ed6\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-23 08:00:00\",\"desc\":\"\\u966a\\u4f34\\u672c\\u6765\\u5c31\\u662f\\u8fd9\\u4e16\\u754c\\u4e0a\\u6700\\u4e86\\u4e0d\\u8d77\\u7684\\u5b89\\u6170\\u200b\\u3002\",\"images\":[\"http://gank.io/images/6b2efa591564475fb8bc32291fb0007c\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-23 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c94\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/6b2efa591564475fb8bc32291fb0007c\",\"views\":135},{\"_id\":\"5e959200ee6ba981da2af34d\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-22 08:00:00\",\"desc\":\"\\u957f\\u4e0d\\u8fc7\\u6267\\u5ff5\\uff0c\\u77ed\\u4e0d\\u8fc7\\u5584\\u53d8\\u3002\",\"images\":[\"http://gank.io/images/d6bba8cf5b8c40f9ad229844475e9149\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-22 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c93\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/d6bba8cf5b8c40f9ad229844475e9149\",\"views\":192},{\"_id\":\"5e9591dcee6ba981da2af34b\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-21 08:00:00\",\"desc\":\"\\u65e0\\u8bba\\u591a\\u4e48\\u8270\\u96be\\u7684\\u73b0\\u5728\\uff0c\\u7ec8\\u4f1a\\u7ffb\\u7bc7\\u3002\\n\\u671d\\u672a\\u6765\\u5927\\u6b65\\u5411\\u524d\\u5427\\uff0c\\u522b\\u4e27\\uff0c\\u522b\\u6b62\\u6b65\\u3002\",\"images\":[\"http://gank.io/images/9fa43020cf724c69842eec3e13f6d21c\"],\"likeCounts\":1,\"publishedAt\":\"2020-05-21 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c92\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/9fa43020cf724c69842eec3e13f6d21c\",\"views\":176},{\"_id\":\"5e9591c60bd5529b54e712af\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-20 08:00:00\",\"desc\":\"\\u5e0c\\u671b\\u4e0b\\u4e00\\u6b21\\uff0c\\u80fd\\u559c\\u6b22\\u4e0a\\u4e00\\u4e2a\\u4e5f\\u559c\\u6b22\\u81ea\\u5df1\\u7684\\u4eba \\u200b\\u200b\\u200b\\u200b\\u3002\",\"images\":[\"http://gank.io/images/d237f507bf1946d2b0976e581f8aab9b\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-20 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c91\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/d237f507bf1946d2b0976e581f8aab9b\",\"views\":180},{\"_id\":\"5e9591b6808d6d2fe6b56ed5\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-19 08:00:00\",\"desc\":\"\\u8fd9\\u4e2a\\u4e16\\u754c\\u4e0a\\uff0c\\n\\u6709\\u4e9b\\u4eba\\u6709\\u591a\\u51b7\\u6f20\\uff0c\\n\\u6709\\u4e9b\\u4eba\\u5c31\\u6709\\u591a\\u6e29\\u6696\\uff0c\\n\\u5e0c\\u671b\\u4f60\\u603b\\u4f1a\\u9047\\u5230\\u90a3\\u4e9b\\u6e29\\u6696\\u5bf9\\u4f60\\u7684\\u4eba\\u3002\",\"images\":[\"http://gank.io/images/25d3e3db2c1248bb917c09dc4f50a46f\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-19 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c90\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/25d3e3db2c1248bb917c09dc4f50a46f\",\"views\":255},{\"_id\":\"5e9591a2ee6ba981da2af34a\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-18 08:00:00\",\"desc\":\"\\u4ee5\\u524d\\u5bf9\\u4f60\\u7684\\u559c\\u6b22\\uff0c\\n\\u662f\\u89c1\\u4f60\\uff0c\\u5ff5\\u4f60\\uff0c\\u966a\\u4f34\\u4f60\\u3002\\n\\u73b0\\u5728\\u5bf9\\u4f60\\u7684\\u559c\\u6b22\\uff0c\\n\\u662f\\u4e0d\\u95ee\\uff0c\\u4e0d\\u770b\\uff0c\\u4e0d\\u53e8\\u6270\\u3002\",\"images\":[\"http://gank.io/images/19c99c447e0a40a6b3ff89951957cfb1\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-18 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c89\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/19c99c447e0a40a6b3ff89951957cfb1\",\"views\":240},{\"_id\":\"5e959197808d6d2fe6b56ed4\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-17 08:00:00\",\"desc\":\"\\u53ea\\u8981\\u7ed3\\u5c40\\u662f\\u559c\\u5267\\uff0c\\u8fc7\\u7a0b\\u4f60\\u8981\\u6211\\u600e\\u4e48\\u54ed\\u90fd\\u884c\\uff0c\\u5e78\\u798f\\u53ef\\u4ee5\\u6765\\u7684\\u6162\\u4e00\\u4e9b\\uff0c\\n\\u53ea\\u8981\\u5b83\\u662f\\u771f\\u7684\\uff0c\\u5982\\u679c\\u6700\\u540e\\u80fd\\u5728\\u4e00\\u8d77\\uff0c\\u665a\\u70b9\\u6211\\u771f\\u7684\\u65e0\\u6240\\u8c13\\u7684\\u3002\",\"images\":[\"http://gank.io/images/f0c192e3e335400db8a709a07a891b2e\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-17 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c88\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/f0c192e3e335400db8a709a07a891b2e\",\"views\":275},{\"_id\":\"5e95915f808d6d2fe6b56ed3\",\"author\":\"\\u9e22\\u5a9b\",\"category\":\"Girl\",\"createdAt\":\"2020-05-16 08:00:00\",\"desc\":\"\\u82e5\\u4e0d\\u662f\\u60c5\\u6df1\\u4f3c\\u6d77\\uff0c\\u601d\\u5ff5\\u53c8\\u600e\\u4f1a\\u6cdb\\u6ee5\\u6210\\u707e\\u3002\",\"images\":[\"http://gank.io/images/bdb35e4b3c0045c799cc7a494a3db3e0\"],\"likeCounts\":0,\"publishedAt\":\"2020-05-16 08:00:00\",\"stars\":1,\"title\":\"\\u7b2c87\\u671f\",\"type\":\"Girl\",\"url\":\"http://gank.io/images/bdb35e4b3c0045c799cc7a494a3db3e0\",\"views\":437}],\"page\":1,\"page_count\":10,\"status\":100,\"total_counts\":96}";
}

④ 創建列表的item佈局文件

在layout文件下創建item_data_list.xml佈局文件


代碼如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="12dp"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/item_data"
        android:foreground="@drawable/bg_white"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/shape_blue_bg_5"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:padding="12dp">

        <ImageView
            android:id="@+id/iv_check"
            android:layout_width="20dp"
            android:layout_height="20dp"
            android:layout_marginRight="12dp"
            android:background="@mipmap/icon_choose_default"
            android:button="@null" />


        <ImageView
            android:id="@+id/iv_img"
            android:layout_width="150dp"
            android:layout_height="200dp"
            android:background="@drawable/ic_launcher_background"
            android:scaleType="centerCrop" />


        <TextView
            android:id="@+id/tv_video_info"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="12dp"
            android:text="測試數據"
            android:textColor="@color/white"
            android:textSize="16sp" />
    </LinearLayout>
</LinearLayout>

⑤ 列表適配器

創建一個適配器DataAdapter.java

代碼如下：

package com.llw.recyclerviewusedemo;

import android.view.View;
import android.widget.ImageView;

import androidx.annotation.Nullable;

import com.bumptech.glide.Glide;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;

import java.util.List;

/**
 * 適配器
 */
public class DataAdapter extends BaseQuickAdapter<DataResponse.DataBean, BaseViewHolder> {

    private static final int STATE_DEFAULT = 0;//默認狀態
    int mEditMode = STATE_DEFAULT;

    public DataAdapter(int layoutResId, @Nullable List<DataResponse.DataBean> data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(BaseViewHolder helper, DataResponse.DataBean item) {
        //Glide加載網絡圖片
        Glide.with(mContext).load(item.getUrl()).into((ImageView) helper.getView(R.id.iv_img));
        //TextView賦值
        helper.setText(R.id.tv_video_info, item.getAuthor());

        helper.addOnClickListener(R.id.item_data);//添加item點擊事件

        if (mEditMode == STATE_DEFAULT) {
            //默認不顯示
            helper.getView(R.id.iv_check).setVisibility(View.GONE);
        } else {
            //顯示   顯示之後再做點擊之後的判斷
            helper.getView(R.id.iv_check).setVisibility(View.VISIBLE);

            if (item.isSelect()) {//點擊時，true 選中
                helper.getView(R.id.iv_check).setBackgroundResource(R.mipmap.icon_choose_selected);
            } else {//false 取消選中
                helper.getView(R.id.iv_check).setBackgroundResource(R.mipmap.icon_choose_default);
            }
        }
    }

    /**
     * 設置編輯狀態   接收Activity中傳遞的值，並改變Adapter的狀態
     */
    public void setEditMode(int editMode) {
        mEditMode = editMode;
        notifyDataSetChanged();//刷新
    }
}

⑥ 主要邏輯編寫

進入到MainActivity.java

這裏綁定一些控件並聲明一些需要用到的變量

初始化列表數據

	//初始化列表數據
    private void initList() {
        mAdapter = new DataAdapter(R.layout.item_data_list, mList);//綁定視圖和數據
        rv.setLayoutManager(new LinearLayoutManager(this));//設置線性佈局管理器
        rv.setAdapter(mAdapter);//設置適配器

        Gson gson = new Gson();
        DataResponse dataBean = gson.fromJson(JsonData.JSON, DataResponse.class);//解析數據
        List<DataResponse.DataBean> resultsBeans = dataBean.getData();

        if (resultsBeans.size() > 0) {
            mList.clear();
            mList.addAll(resultsBeans);
            mAdapter.notifyDataSetChanged();//刷新數據
            rv.setVisibility(View.VISIBLE);
            rvNormalShow.setVisibility(View.GONE);
        } else {
            rv.setVisibility(View.GONE);
            rvNormalShow.setVisibility(View.VISIBLE);
        }
        refresh.finishRefresh();//數據加載出來之後，結束下拉動作
    }

處理點擊事件

	//頁面的點擊事件
    @OnClick({R.id.tv_edit, R.id.tv_check_all, R.id.tv_delete})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.tv_edit://編輯
                updateEditState();
                break;
            case R.id.tv_check_all://全選
                setAllItemChecked();
                break;
            case R.id.tv_delete://刪除
                deleteCheckItem();
                break;
        }
    }

改變編輯狀態

	//改變編輯狀態
    private void updateEditState() {
        mEditMode = mEditMode == STATE_DEFAULT ? STATE_EDIT : STATE_DEFAULT;
        if (mEditMode == STATE_EDIT) {
            tvEdit.setText("取消");
            layBottom.setVisibility(View.VISIBLE);
            editorStatus = true;//處於編輯狀態
        } else {
            tvEdit.setText("編輯");
            layBottom.setVisibility(View.GONE);
            editorStatus = false;//處於默認狀態

            setAllItemUnchecked();//取消全選
        }
        mAdapter.setEditMode(mEditMode);//刷新Adapter

        mAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
            @Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                if (editorStatus) {//編輯狀態
                    DataResponse.DataBean dataBean = mList.get(position);//賦值
                    boolean isSelect = dataBean.isSelect();
                    if (!isSelect) {
                        index++;
                        dataBean.setSelect(true);

                    } else {
                        dataBean.setSelect(false);
                        index--;
                    }
                    if (index == 0) {//當前選中item數量
                        tvDelete.setText("刪除");
                    } else {
                        tvDelete.setText("刪除(" + index + ")");
                    }

                    mAdapter.notifyDataSetChanged();
                }
            }
        });
    }

全部選中

	//全部選中
    private void setAllItemChecked() {
        if (mAdapter == null) return;
        for (int i = 0; i < mList.size(); i++) {
            mList.get(i).setSelect(true);
        }
        mAdapter.notifyDataSetChanged();
        index = mList.size();
        tvDelete.setText("刪除(" + index + ")");
    }

取消全部選中

	//取消全部選中
    private void setAllItemUnchecked() {
        if (mAdapter == null) return;
        for (int i = 0; i < mList.size(); i++) {
            mList.get(i).setSelect(false);
        }
        mAdapter.notifyDataSetChanged();
        tvDelete.setText("刪除");
        index = 0;
    }

刪除選中的item

	//刪除選中的item
    private void deleteCheckItem() {
        if (mAdapter == null) return;
        for (int i = mList.size() - 1; i >= 0; i--) {
            if (mList.get(i).isSelect() == true) {
                mList.remove(i);
            }
        }

        //刪除選中的item之後判斷是否還有數據，沒有則退出編輯模式
        if (mList.size() != 0) {
            index = 0;//刪除之後置爲0
            tvDelete.setText("刪除");
        }else {
            tvEdit.setText("編輯");
            layBottom.setVisibility(View.GONE);
            editorStatus = false;
            //沒有數據自然也不存在編輯了
            tvEdit.setVisibility(View.GONE);
            rvNormalShow.setVisibility(View.VISIBLE);
            //啓用下拉
            refresh.setEnableRefresh(true);
            //下拉刷新
            refresh.setOnRefreshListener(refreshLayout -> {
                //重新裝填數據
                initList();
                mEditMode = STATE_DEFAULT;//恢復默認狀態
                editorStatus = false;//恢復默認狀態
                tvEdit.setVisibility(View.VISIBLE);//顯示編輯
            });
        }
        mAdapter.notifyDataSetChanged();//刷新
    }

最後在onCreate()方法中使用

 	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

        initList();

        //禁用下拉和上拉
        refresh.setEnableRefresh(false);
        refresh.setEnableLoadMore(false);
    }

做完這些基本上功能就已經都實現了，下面就是錦上添花了，增加動畫效果，

⑦ 增加動畫效果

列表的出現動畫，在res下創建一個anim文件夾，這下面有兩個xml文件

layout_animation_from_bottom.xml

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:animation="@anim/item_animation_from_bottom"
    android:delay="15%"
    android:animationOrder="normal"
    />

item_animation_from_bottom.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500">

    <translate
        android:fromYDelta="50%p"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:toYDelta="0" />

    <alpha
        android:fromAlpha="0"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:toAlpha="1" />

</set>

然後創建一個動畫類RecyclerViewAnimation.java，用來使用

代碼如下：

package com.llw.recyclerviewusedemo;

import android.content.Context;
import android.view.animation.AnimationUtils;
import android.view.animation.LayoutAnimationController;

import androidx.recyclerview.widget.RecyclerView;


/**
 * RecyclerView動畫
 */

public class RecyclerViewAnimation {

    //數據變化時顯示動畫
    public static void runLayoutAnimation(final RecyclerView recyclerView) {
        final Context context = recyclerView.getContext();
        final LayoutAnimationController controller =
                AnimationUtils.loadLayoutAnimation(context, R.anim.layout_animation_from_bottom);

        recyclerView.setLayoutAnimation(controller);
        recyclerView.getAdapter().notifyDataSetChanged();
        recyclerView.scheduleLayoutAnimation();
    }
}

使用方法

import static com.llw.recyclerviewusedemo.RecyclerViewAnimation.runLayoutAnimation;//導入

MainActivity.java完整代碼

package com.llw.recyclerviewusedemo;

import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.chad.library.adapter.base.BaseQuickAdapter;
import com.google.gson.Gson;
import com.scwang.smartrefresh.layout.SmartRefreshLayout;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

import static com.llw.recyclerviewusedemo.RecyclerViewAnimation.runLayoutAnimation;

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.tv_edit)
    TextView tvEdit;//編輯
    @BindView(R.id.rv_normal_show)
    LinearLayout rvNormalShow;//沒有數據時展示的佈局
    @BindView(R.id.rv)
    RecyclerView rv;//列表
    @BindView(R.id.refresh)
    SmartRefreshLayout refresh;//刷新佈局
    @BindView(R.id.tv_check_all)
    TextView tvCheckAll;//全選
    @BindView(R.id.tv_delete)
    TextView tvDelete;//刪除
    @BindView(R.id.lay_bottom)
    LinearLayout layBottom;//底部佈局

    private static final int STATE_DEFAULT = 0;//默認狀態
    private static final int STATE_EDIT = 1;//編輯狀態
    private int mEditMode = STATE_DEFAULT;
    private boolean editorStatus = false;//是否爲編輯狀態
    private int index = 0;//當前選中的item數

    List<DataResponse.DataBean> mList = new ArrayList<>();//列表
    DataAdapter mAdapter;//適配器

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

        initList();

        //禁用下拉和上拉
        refresh.setEnableRefresh(false);
        refresh.setEnableLoadMore(false);
    }

    //初始化列表數據
    private void initList() {
        mAdapter = new DataAdapter(R.layout.item_data_list, mList);//綁定視圖和數據
        rv.setLayoutManager(new LinearLayoutManager(this));//設置線性佈局管理器
        rv.setAdapter(mAdapter);//設置適配器

        Gson gson = new Gson();
        DataResponse dataBean = gson.fromJson(JsonData.JSON, DataResponse.class);//解析數據
        List<DataResponse.DataBean> resultsBeans = dataBean.getData();

        if (resultsBeans.size() > 0) {
            mList.clear();
            mList.addAll(resultsBeans);
            mAdapter.notifyDataSetChanged();//刷新數據
            runLayoutAnimation(rv);//動畫顯示
            rv.setVisibility(View.VISIBLE);
            rvNormalShow.setVisibility(View.GONE);
        } else {
            rv.setVisibility(View.GONE);
            rvNormalShow.setVisibility(View.VISIBLE);
        }
        refresh.finishRefresh();//數據加載出來之後，結束下拉動作
    }

    //頁面的點擊事件
    @OnClick({R.id.tv_edit, R.id.tv_check_all, R.id.tv_delete})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.tv_edit://編輯
                updateEditState();
                break;
            case R.id.tv_check_all://全選
                setAllItemChecked();
                break;
            case R.id.tv_delete://刪除
                deleteCheckItem();
                break;
        }
    }

    //改變編輯狀態
    private void updateEditState() {
        mEditMode = mEditMode == STATE_DEFAULT ? STATE_EDIT : STATE_DEFAULT;
        if (mEditMode == STATE_EDIT) {
            tvEdit.setText("取消");
            layBottom.setVisibility(View.VISIBLE);
            editorStatus = true;
        } else {
            tvEdit.setText("編輯");
            layBottom.setVisibility(View.GONE);
            editorStatus = false;

            setAllItemUnchecked();//取消全選
        }
        mAdapter.setEditMode(mEditMode);

        mAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
            @Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                if (editorStatus) {//編輯狀態
                    DataResponse.DataBean dataBean = mList.get(position);
                    boolean isSelect = dataBean.isSelect();
                    if (!isSelect) {
                        index++;
                        dataBean.setSelect(true);

                    } else {
                        dataBean.setSelect(false);
                        index--;
                    }
                    if (index == 0) {
                        tvDelete.setText("刪除");
                    } else {
                        tvDelete.setText("刪除(" + index + ")");
                    }

                    mAdapter.notifyDataSetChanged();
                }
            }
        });
    }

    //全部選中
    private void setAllItemChecked() {
        if (mAdapter == null) return;
        for (int i = 0; i < mList.size(); i++) {
            mList.get(i).setSelect(true);
        }
        mAdapter.notifyDataSetChanged();
        index = mList.size();
        tvDelete.setText("刪除(" + index + ")");
    }

    //取消全部選中
    private void setAllItemUnchecked() {
        if (mAdapter == null) return;
        for (int i = 0; i < mList.size(); i++) {
            mList.get(i).setSelect(false);
        }
        mAdapter.notifyDataSetChanged();
        tvDelete.setText("刪除");
        index = 0;
    }



    //刪除選中的item
    private void deleteCheckItem() {
        if (mAdapter == null) return;

        for (int i = mList.size() - 1; i >= 0; i--) {

            if (mList.get(i).isSelect() == true) {
                mList.remove(i);
            }
        }

        //刪除選中的item之後判斷是否還有數據，沒有則退出編輯模式
        if (mList.size() != 0) {
            index = 0;//刪除之後置爲0
            tvDelete.setText("刪除");
        }else {
            tvEdit.setText("編輯");
            layBottom.setVisibility(View.GONE);
            editorStatus = false;
            //沒有數據自然也不存在編輯了
            tvEdit.setVisibility(View.GONE);
            rvNormalShow.setVisibility(View.VISIBLE);
            //啓用下拉
            refresh.setEnableRefresh(true);

            //下拉刷新
            refresh.setOnRefreshListener(refreshLayout -> {
                //重新裝填數據
                initList();
                index = 0;
                mEditMode = STATE_DEFAULT;//恢復默認狀態
                editorStatus = false;//恢復默認狀態
                tvDelete.setText("刪除");
                tvEdit.setVisibility(View.VISIBLE);//顯示編輯
            });
        }

        mAdapter.notifyDataSetChanged();
        runLayoutAnimation(rv);//動畫顯示
    }
}

尾聲

感謝每一個閱讀的人，寫文章只爲積累自己的經驗，不至於忘記，如果能對看文章的您有幫助，那就更好了，我是初學者-Study,山高水長，後會有期~