组合控件——增强型列表——循环视图RecyclerView
作者：互联网
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NewsInfo
package com.example.myapplication.bean;
import com.example.myapplication.R;
import java.util.ArrayList;
import java.util.List;
public class NewsInfo
{
public int pic_id; // 图片的资源编号
public String title; // 标题
public String desc; // 描述
public boolean isPressed; // 是否按下
public int id; // 商品信息编号
private static int seq = 0; // 序号
public NewsInfo(int pic_id, String title, String desc)
{
this.pic_id = pic_id;
this.title = title;
this.desc = desc;
this.isPressed = false;
this.id = this.seq;
this.seq++;
}
private static int[] newsImageArray = {R.drawable.public_01, R.drawable.public_02
, R.drawable.public_03, R.drawable.public_04, R.drawable.public_05};
private static String[] newsTitleArray = {
"首都日报", "海峡时报", "东方周末", "参照消息", "挨踢杂志"};
private static String[] newsDescArray = {
"北京冬奥精彩纷呈，中外健儿各显神通",
"庆祝伟大统一，闽台两地合办中秋晚会",
"日本新娘仰慕中土，纷纷跨海嫁往上海",
"雅万高铁建成通车，中国标准再下一城",
"Mate40大战iPhone12，两大豪机争上游"};
public static List<NewsInfo> getDefaultList()
{
List<NewsInfo> newsList = new ArrayList<NewsInfo>();
for (int i = 0; i < newsImageArray.length; i++) {
newsList.add(new NewsInfo(newsImageArray[i], newsTitleArray[i], newsDescArray[i]));
}
return newsList;
}
private static int[] gridImageArray = {R.drawable.pic_01, R.drawable.pic_02, R.drawable.pic_03
, R.drawable.pic_04, R.drawable.pic_05, R.drawable.pic_06, R.drawable.pic_07
, R.drawable.pic_08, R.drawable.pic_09, R.drawable.pic_10};
private static String[] gridTitleArray = {"商场", "超市", "百货", "便利店",
"地摊", "食杂店", "饭店", "餐厅", "会所", "菜市场"};
public static List<NewsInfo> getDefaultGrid() {
List<NewsInfo> gridList = new ArrayList<NewsInfo>();
for (int i = 0; i < gridImageArray.length; i++) {
gridList.add(new NewsInfo(gridImageArray[i], gridTitleArray[i], null));
}
return gridList;
}
private static int[] stagImageArray = {R.drawable.skirt01, R.drawable.skirt02, R.drawable.skirt03
, R.drawable.skirt04, R.drawable.skirt05, R.drawable.skirt06, R.drawable.skirt07
, R.drawable.skirt08, R.drawable.skirt09, R.drawable.skirt10, R.drawable.skirt11
, R.drawable.skirt12, R.drawable.skirt13, R.drawable.skirt14, R.drawable.skirt15
, R.drawable.skirt16, R.drawable.skirt17, R.drawable.skirt18, R.drawable.skirt19
, R.drawable.skirt20, R.drawable.skirt21, R.drawable.skirt22, R.drawable.skirt23};
private static String[] stagTitleArray = {"促销价", "惊爆价", "跳楼价", "白菜价", "清仓价", "割肉价",
"实惠价", "一口价", "满意价", "打折价", "腰斩价", "无人问津", "算了吧", "大声点",
"嘘嘘", "嗯嗯", "呼呼", "呵呵", "哈哈", "嘿嘿", "嘻嘻", "嗷嗷", "喔喔"};
public static List<NewsInfo> getDefaultStag() {
List<NewsInfo> stagList = new ArrayList<NewsInfo>();
for (int i = 0; i < stagImageArray.length; i++) {
stagList.add(new NewsInfo(stagImageArray[i], stagTitleArray[i], null));
}
return stagList;
}
private static int[] combineImageArray = {R.drawable.cainixihuan, R.drawable.dapaijiadao
, R.drawable.trip_01, R.drawable.trip_02, R.drawable.trip_03, R.drawable.trip_04};
private static String[] combineTitleArray = {
"猜你喜欢", "大牌驾到", "买哪个", "别想了", "先下单", "包你满意"};
public static List<NewsInfo> getDefaultCombine() {
List<NewsInfo> combineList = new ArrayList<NewsInfo>();
for (int i = 0; i < combineImageArray.length; i++) {
combineList.add(new NewsInfo(combineImageArray[i], combineTitleArray[i], null));
}
return combineList;
}
private static int[] appiImageArray = {R.drawable.dian01, R.drawable.dian02, R.drawable.dian03
, R.drawable.dian04, R.drawable.dian05, R.drawable.dian06, R.drawable.dian07
, R.drawable.dian08, R.drawable.dian09, R.drawable.dian10, R.drawable.dian11
, R.drawable.dian12, R.drawable.dian13, R.drawable.dian14, R.drawable.dian15};
private static String[] appiTitleArray = {"双十一", "大聚惠", "爆款价",
"就一次", "手慢无", "快点击", "付定金", "享特权", "包安装", "再返券",
"白送你", "想得美", "干活去", "好好学", "才有钱"};
public static List<NewsInfo> getDefaultAppi() {
List<NewsInfo> appiList = new ArrayList<NewsInfo>();
for (int i = 0; i < appiImageArray.length; i++) {
appiList.add(new NewsInfo(appiImageArray[i], appiTitleArray[i], null));
}
return appiList;
}
}
RecyclerLinearAdapter
package com.example.myapplication.adapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.ViewHolder;
import com.example.myapplication.R;
import com.example.myapplication.bean.NewsInfo;
import java.util.List;
public class RecyclerLinearAdapter extends RecyclerView.Adapter<ViewHolder>
{
private final static String TAG = "RecyclerLinearAdapter";
private Context mContext; // 声明一个上下文对象
private List<NewsInfo> mPublicList; // 公众号列表
public RecyclerLinearAdapter(Context context, List<NewsInfo> publicList)
{
mContext = context;
mPublicList = publicList;
}
// 获取列表项的个数
public int getItemCount()
{
return mPublicList.size();
}
// 创建列表项的视图持有者
public ViewHolder onCreateViewHolder(ViewGroup vg, int viewType)
{
// 根据布局文件item_linear.xml生成视图对象
View v = LayoutInflater.from(mContext).inflate(R.layout.item_linear, vg, false);
return new ItemHolder(v);
}
// 绑定列表项的视图持有者
public void onBindViewHolder(ViewHolder vh, final int position) {
ItemHolder holder = (ItemHolder) vh;
holder.iv_pic.setImageResource(mPublicList.get(position).pic_id);
holder.tv_title.setText(mPublicList.get(position).title);
holder.tv_desc.setText(mPublicList.get(position).desc);
}
// // 获取列表项的类型，这里的类型与onCreateViewHolder方法的viewType参数保持一致
// public int getItemViewType(int position) {
// return 0;
// }
//
// // 获取列表项的编号
// public long getItemId(int position) {
// return position;
// }
// 定义列表项的视图持有者
public class ItemHolder extends ViewHolder
{
public ImageView iv_pic; // 声明列表项图标的图像视图
public TextView tv_title; // 声明列表项标题的文本视图
public TextView tv_desc; // 声明列表项描述的文本视图
public ItemHolder(View v)
{
super(v);
iv_pic = v.findViewById(R.id.iv_pic);
tv_title = v.findViewById(R.id.tv_title);
tv_desc = v.findViewById(R.id.tv_desc);
}
}
}
item_linear.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_item"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv_pic"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:scaleType="fitCenter" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_weight="7"
android:orientation="vertical">
<TextView
android:id="@+id/tv_title"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="left|center"
android:textColor="@color/black"
android:textSize="17sp" />
<TextView
android:id="@+id/tv_desc"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="left|top"
android:textColor="@color/grey"
android:textSize="13sp" />
</LinearLayout>
<TextView
android:id="@+id/tv_delete"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="3"
android:background="@color/red"
android:gravity="center"
android:text="删除该聊天"
android:textColor="@color/white"
android:textSize="17sp"
android:visibility="gone" />
</LinearLayout>
SpacesDecoration
package com.example.myapplication.widget;
import android.graphics.Rect;
import android.view.View;
import androidx.recyclerview.widget.RecyclerView;
public class SpacesDecoration extends RecyclerView.ItemDecoration
{
private int space; // 空白间隔
public SpacesDecoration(int space)
{
this.space = space;
}
@Override
public void getItemOffsets(Rect outRect, View v, RecyclerView parent, RecyclerView.State state)
{
outRect.left = space; // 左边空白间隔
outRect.right = space; // 右边空白间隔
outRect.bottom = space; // 上方空白间隔
outRect.top = space; // 下方空白间隔
}
}
布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="5dp">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rv_linear"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#aaaaff" />
</LinearLayout>
主代码：
package com.example.myapplication;
import android.annotation.SuppressLint;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.DefaultItemAnimator;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.example.myapplication.adapter.RecyclerLinearAdapter;
import com.example.myapplication.bean.NewsInfo;
import com.example.myapplication.widget.SpacesDecoration;
@SuppressLint("SetTextI18n")
public class MainActivity extends AppCompatActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initRecyclerLinear(); // 初始化线性布局的循环视图
}
// 初始化线性布局的循环视图
private void initRecyclerLinear()
{
// 从布局文件中获取名叫rv_linear的循环视图
RecyclerView rv_linear = findViewById(R.id.rv_linear);
// 创建一个垂直方向的线性布局管理器
LinearLayoutManager manager = new LinearLayoutManager(this, RecyclerView.VERTICAL, false);
rv_linear.setLayoutManager(manager); // 设置循环视图的布局管理器
// 构建一个公众号列表的线性适配器
RecyclerLinearAdapter adapter = new RecyclerLinearAdapter(this, NewsInfo.getDefaultList());
rv_linear.setAdapter(adapter); // 设置循环视图的线性适配器
rv_linear.setItemAnimator(new DefaultItemAnimator()); // 设置循环视图的动画效果
rv_linear.addItemDecoration(new SpacesDecoration(1)); // 设置循环视图的空白装饰
}
}
标签：控件,int,pic,视图,static,import,drawable,RecyclerView,public 来源： https://www.cnblogs.com/xiaobaibailongma/p/16678394.html