Android实现RecyclerView嵌套流式布局

前言

Android开发中，列表页面是常见需求，流式布局的标签效果也是常见需求，那么两者结合的效果啥样呢？这篇文章简单实现一下。

实现过程

1. 添加流式布局依赖，在app/build.gradle文件中添加如下代码

1. 新建Activity文件RecyclerViewActivity.class

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

import android.os.Bundle;
import android.widget.Toast;

import com.example.androidstudy.adapter.MyRecyclerAdapter;
import com.example.androidstudy.bean.TestData;

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

public class RecyclerViewActivity extends AppCompatActivity {

private RecyclerView recyclerView;
private MyRecyclerAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recycler_view);
initViews();
initListener();
}

private void initListener() {
adapter.setItemCellClicker(tag -> Toast.makeText(RecyclerViewActivity.this, tag, Toast.LENGTH_SHORT).show());
}

private void initViews() {
recyclerView = findViewById(R.id.recyclerview);
// 设置布局管理器
recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
List sss = new ArrayList<>();
sss.add("重型卡车1");
sss.add("重车11");
sss.add("重型卡车3445");
sss.add("重型卡车6677");
List sss1 = new ArrayList<>();
sss1.add("轻型卡车1");
sss1.add("轻车11");
sss1.add("轻型卡车3445");
sss1.add("轻型卡车6677");

List sss2 = new ArrayList<>();
sss2.add("其他1");
sss2.add("其他2");
List list = new ArrayList<>();
list.add(new TestData("重型",sss));
list.add(new TestData("轻型", sss1));
list.add(new TestData("其他", sss2));
// 实例化Adapter对象
adapter = new MyRecyclerAdapter(this, list);
// 设置Adapter
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
}


Activity页面布局activity_recycler_view.xml

"1.0" encoding="utf-8"?>
"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=".RecyclerViewActivity">

android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"/>

1. 创建Adapter文件MyRecyclerAdapter.class

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.example.androidstudy.R;
import com.example.androidstudy.bean.TestData;
import com.google.android.flexbox.FlexboxLayout;

import java.util.List;

public class MyRecyclerAdapter extends RecyclerView.Adapter{

private List data;
private Context myContext;

public MyRecyclerAdapter(Context context, List data) {
this.myContext = context;
this.data = data;
}

@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_cell, parent, false);
return new MyViewHolder(inflate);
}

public interface ItemCellClicker{
void onItemClick(String tag);
}

// 流式布局标签点击事件
public ItemCellClicker itemCellClicker;
// 设置点击事件回调
public void setItemCellClicker(ItemCellClicker itemCellClicker){
this.itemCellClicker = itemCellClicker;
}

@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
TextView title = holder.itemView.findViewById(R.id.tv_title);
FlexboxLayout flexboxLayout = holder.itemView.findViewById(R.id.flexbox_layout);

TestData data = this.data.get(position);
List tags = data.getTag();
flexboxLayout.removeAllViews();
// flexbox布局动态添加标签
for (int i = 0; i < tags.size(); i++) {
String temp = tags.get(i);
View tagView = LayoutInflater.from(myContext).inflate(R.layout.item_tag_cell, null, false);
TextView tag = tagView.findViewById(R.id.tv_tag);
tag.setText(temp);
// 设置标签点击事件
tag.setOnClickListener(view -> itemCellClicker.onItemClick(temp));
flexboxLayout.addView(tagView);
}
title.setText(data.getTitle());
}

@Override
public int getItemCount() {
return data.size();
}

public static class MyViewHolder extends RecyclerView.ViewHolder{

public MyViewHolder(@NonNull View itemView) {
super(itemView);
}
}
}


列表项布局item_cell.xml

"1.0" encoding="utf-8"?>
"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"
android:orientation="vertical"
android:padding="10dp"
tools:context=".MyActivity">

app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
android:id="@+id/tv_title"
android:text="Hello android"
android:textSize="20sp"
android:textColor="@color/black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

android:id="@+id/flexbox_layout"
android:orientation="horizontal"
app:flexWrap="wrap"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

列表中标签布局item_tag_cell.xml

"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"
android:padding="10dp"
tools:context=".MyActivity">

android:id="@+id/tv_tag"
android:paddingHorizontal="12dp"
android:background="@drawable/item_tag_bg"
android:gravity="center"
android:text="Hello android"
android:textSize="20sp"
android:textColor="@color/black"
android:layout_width="wrap_content"
android:layout_height="32dp"/>

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