- RecyclerView页面布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".ui.equipment.EquipmentJobLoggingActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/wareHouse_scrap_fra"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
- RecyclerView列表的每一项布局文件
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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="wrap_content">
<androidx.cardview.widget.CardView
android:id="@+id/Card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="10dp"
android:layout_marginBottom="5dp"
android:translationZ="2dp"
app:cardCornerRadius="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/person_time"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:background="@color/aurantius"
android:gravity="center"
android:rotation="45"
android:text="唐代"
android:textColor="@color/white"
android:textSize="10sp"
android:translationX="13dp"
android:translationY="7dp"
android:translationZ="10dp" />
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp"
android:paddingStart="@dimen/f_mp_10_lr"
android:paddingEnd="@dimen/f_mp_10_lr"
android:translationZ="2dp">
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginStart="10dp"
android:layout_marginTop="10dp"
android:gravity="center_vertical"
android:text=""
android:textSize="18sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/title_person"
android:layout_width="wrap_content"
android:layout_height="25dp"
android:layout_marginTop="25dp"
android:layout_marginEnd="10dp"
android:gravity="center_vertical"
android:text=""
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="@+id/msg_ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="10dp"
android:layout_marginEnd="10dp"
android:layout_marginBottom="10dp"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/title">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="4dp"
android:background="@color/divider" />
<TextView
android:id="@+id/msg_contentMore"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginTop="4dp"
android:layout_marginRight="5dp"
android:layout_marginBottom="10dp"
android:text=""
android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
- 设置适配器 ，实现点击折叠展示（其实是通过控制隐藏和显示布局实现手风琴折叠效果）
public class MsgBean {
private String person_time;
private String person;
private String content;
private String contentMore;
}
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import androidx.cardview.widget.CardView;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class MsgAdapter extends RecyclerView.Adapter<MsgAdapter.ViewHolder> {
private Context context;
private List<MsgBean> lists;
private int opened = -1;
public MsgAdapter(Context context,List<MsgBean> lists) {
this.context = context;
this.lists = lists;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.msg_item, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.bindView(position,lists.get(position));
}
@Override
public int getItemCount() {
return lists.size();
}
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView person_time,title,title_person,msg_contentMore;
private LinearLayout msgLl;
private CardView Card;
public ViewHolder(View itemView) {
super(itemView);
person_time = itemView.findViewById(R.id.person_time);
title = itemView.findViewById(R.id.title);
title_person = itemView.findViewById(R.id.title_person);
msg_contentMore = itemView.findViewById(R.id.msg_contentMore);
Card = itemView.findViewById(R.id.Card);
msgLl = itemView.findViewById(R.id.msg_ll);
Card.setOnClickListener(this);
}
public void bindView(int pos, MsgBean bean) {
person_time.setText(bean.getPerson_time());
title.setText(bean.getContent());
title_person.setText(bean.getPerson());
msg_contentMore.setText(bean.getContentMore());
if (pos == opened){
msgLl.setVisibility(View.VISIBLE);
} else{
msgLl.setVisibility(View.GONE);
}
}
@Override
public void onClick(View v) {
if (opened == getAbsoluteAdapterPosition()) {
opened = -1;
notifyItemChanged(getAbsoluteAdapterPosition());
} else {
int oldOpened = opened;
opened = getAbsoluteAdapterPosition();
notifyItemChanged(oldOpened);
notifyItemChanged(opened);
}
}
}
}
- 在Fragment中实现代码
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
public class WarehouseFragment extends Fragment {
private Activity myActivity;
private View rootView;
private RecyclerView setCe;
private MsgAdapter msgAdapter;
@Override
public void onAttach(@NonNull Context context) {
this.myActivity = (Activity) context;
super.onAttach(context);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (rootView == null) {
rootView = inflater.inflate(R.layout.fragment_warehouse, container, false);
}
initView();
return rootView;
}
private void initView() {
setCe = rootView.findViewById(R.id.wareHouse_scrap_fra);
setRecyclerViewAdapter();
}
private void setRecyclerViewAdapter() {
setCe.setLayoutManager(getLinearLayoutManager());
msgAdapter = new MsgAdapter(myActivity, getArrayList4());
setCe.setAdapter(msgAdapter);
setCe.getItemAnimator().setChangeDuration(300);
setCe.getItemAnimator().setMoveDuration(300);
}
private LinearLayoutManager getLinearLayoutManager() {
LinearLayoutManager layoutManager = new LinearLayoutManager(getContext(), RecyclerView.VERTICAL, false);
return layoutManager;
}
private List<MsgBean> getArrayList4() {
List<MsgBean> dataList = new ArrayList<>();
dataList.add(new MsgBean( "唐代","李白", "将进酒",
"君不见黄河之水天上来，奔流到海不复回。\n" +
"君不见高堂明镜悲白发，朝如青丝暮成雪。\n" +
"人生得意须尽欢，莫使金樽空对月。\n" +
"天生我材必有用，千金散尽还复来。\n" +
"烹羊宰牛且为乐，会须一饮三百杯。\n" +
"岑夫子，丹丘生，将进酒，杯莫停。\n" +
"与君歌一曲，请君为我倾耳听。(倾耳听 一作：侧耳听)\n" +
"钟鼓馔玉不足贵，但愿长醉不愿醒。(不足贵 一作：何足贵；不愿醒 一作：不复醒)\n" +
"古来圣贤皆寂寞，惟有饮者留其名。(古来 一作：自古；惟 通：唯)\n" +
"陈王昔时宴平乐，斗酒十千恣欢谑。\n" +
"主人何为言少钱，径须沽取对君酌。\n" +
"五花马、千金裘，呼儿将出换美酒，与尔同销万古愁。"));
dataList.add(new MsgBean( "两汉","曹操", "短歌行","对酒当歌，人生几何！\n" +
"譬如朝露，去日苦多。\n" +
"慨当以慷，忧思难忘。\n" +
"何以解忧？唯有杜康。(唯 一作：惟)\n" +
"青青子衿，悠悠我心。\n" +
"但为君故，沉吟至今。\n" +
"呦呦鹿鸣，食野之苹。\n" +
"我有嘉宾，鼓瑟吹笙。\n" +
"明明如月，何时可掇？(明明 一作：皎皎)\n" +
"忧从中来，不可断绝。\n" +
"越陌度阡，枉用相存。\n" +
"契阔谈讌，心念旧恩。(谈讌 一作：谈宴)\n" +
"月明星稀，乌鹊南飞。\n" +
"绕树三匝，何枝可依？\n" +
"山不厌高，海不厌深。\n" +
"周公吐哺，天下归心。"));
dataList.add(new MsgBean( "两汉","诸葛亮", "出师表"," 先帝创业未半而中道崩殂，今天下三分，益州疲弊，此诚危急存亡之秋也。然侍卫之臣不懈于内，忠志之士忘身于外者，盖追先帝之殊遇，欲报之于陛下也。诚宜开张圣听，以光先帝遗德，恢弘志士之气，不宜妄自菲薄，引喻失义，以塞忠谏之路也。\n" +
"\n" +
" 宫中府中，俱为一体；陟罚臧否，不宜异同。若有作奸犯科及为忠善者，宜付有司论其刑赏，以昭陛下平明之理，不宜偏私，使内外异法也。\n" +
"\n" +
" 侍中、侍郎郭攸之、费祎、董允等，此皆良实，志虑忠纯，是以先帝简拔以遗陛下。愚以为宫中之事，事无大小，悉以咨之，然后施行，必能裨补阙漏，有所广益。\n" +
"\n" +
" 将军向宠，性行淑均，晓畅军事，试用于昔日，先帝称之曰能，是以众议举宠为督。愚以为营中之事，悉以咨之，必能使行阵和睦，优劣得所。\n" +
"\n" +
" 亲贤臣，远小人，此先汉所以兴隆也；亲小人，远贤臣，此后汉所以倾颓也。先帝在时，每与臣论此事，未尝不叹息痛恨于桓、灵也。侍中、尚书、长史、参军，此悉贞良死节之臣，愿陛下亲之信之，则汉室之隆，可计日而待也。\n" +
"\n" +
" 臣本布衣，躬耕于南阳，苟全性命于乱世，不求闻达于诸侯。先帝不以臣卑鄙，猥自枉屈，三顾臣于草庐之中，咨臣以当世之事，由是感激，遂许先帝以驱驰。后值倾覆，受任于败军之际，奉命于危难之间，尔来二十有一年矣。\n" +
"\n" +
" 先帝知臣谨慎，故临崩寄臣以大事也。受命以来，夙夜忧叹，恐托付不效，以伤先帝之明；故五月渡泸，深入不毛。今南方已定，兵甲已足，当奖率三军，北定中原，庶竭驽钝，攘除奸凶，兴复汉室，还于旧都。此臣所以报先帝而忠陛下之职分也。至于斟酌损益，进尽忠言，则攸之、祎、允之任也。\n" +
"\n" +
" 愿陛下托臣以讨贼兴复之效，不效，则治臣之罪，以告先帝之灵。若无兴德之言，则责攸之、祎、允等之慢，以彰其咎；陛下亦宜自谋，以咨诹善道，察纳雅言，深追先帝遗诏。臣不胜受恩感激。今当远离，临表涕零，不知所言。"));
dataList.add(new MsgBean( "苏轼","宋代", "水调歌头·明月几时有","丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。\n" +
"\n" +
"明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。\n" +
"转朱阁，低绮户，照无眠。不应有恨，何事长向别时圆？人有悲欢离合，月有阴晴圆缺，此事古难全。但愿人长久，千里共婵娟。"));
dataList.add(new MsgBean( "韩愈","唐代", "师说","古之学者必有师。师者，所以传道受业解惑也。人非生而知之者，孰能无惑？惑而不从师，其为惑也，终不解矣。生乎吾前，其闻道也固先乎吾，吾从而师之；生乎吾后，其闻道也亦先乎吾，吾从而师之。吾师道也，夫庸知其年之先后生于吾乎？是故无贵无贱，无长无少，道之所存，师之所存也。\n" +
"\n" +
" 嗟乎！师道之不传也久矣！欲人之无惑也难矣！古之圣人，其出人也远矣，犹且从师而问焉；今之众人，其下圣人也亦远矣，而耻学于师。是故圣益圣，愚益愚。圣人之所以为圣，愚人之所以为愚，其皆出于此乎？爱其子，择师而教之；于其身也，则耻师焉，惑矣。彼童子之师，授之书而习其句读者，非吾所谓传其道解其惑者也。句读之不知，惑之不解，或师焉，或不焉，小学而大遗，吾未见其明也。巫医乐师百工之人，不耻相师。士大夫之族，曰师曰弟子云者，则群聚而笑之。问之，则曰：“彼与彼年相若也，道相似也，位卑则足羞，官盛则近谀。”呜呼！师道之不复，可知矣。巫医乐师百工之人，君子不齿，今其智乃反不能及，其可怪也欤！\n" +
"\n" +
" 圣人无常师。孔子师郯子、苌弘、师襄、老聃。郯子之徒，其贤不及孔子。孔子曰：三人行，则必有我师。是故弟子不必不如师，师不必贤于弟子，闻道有先后，术业有专攻，如是而已。\n" +
"\n" +
" 李氏子蟠，年十七，好古文，六艺经传皆通习之，不拘于时，学于余。余嘉其能行古道，作《师说》以贻之。"));
return dataList;
}
}
