在页面上使用RecyclerView实现一个列表型信息展示:
步骤如下:
一、在页面布局中添加RecyclerView控件
XML
<TextView
android:id="@+id/txt_gnss_info"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="卫星信息"
android:textColor="#0a0a0a" />
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_gnss_country"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
/>
二、添加单行显示的item布局文件
layout_gnss_counrty_item.xml
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/iv_item_flag"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_gravity="center_vertical"
android:layout_marginLeft="16dp"
android:src="@drawable/flag_beidou_3"
android:layout_centerVertical="true"
/>
<TextView
android:id="@+id/tv_item_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="GNSS国家名称"
android:layout_centerVertical="true"
android:textColor="@color/layer_name"
android:layout_marginLeft="8dp"
android:layout_gravity="center_vertical"/>
</LinearLayout>
三、逻辑实现代码
实体类:
java
public class GnssCountryInfo {
public int FlagId;
public String TextContext;
public GnssCountryInfo(int _id,String _str){
FlagId = _id;
TextContext = _str;
}
}
Adapter类和ViewHolder类:
java
public class GnssCountryAdapter extends RecyclerView.Adapter<GnssCountryAdapter.GnssCountryViewHoder> {
private Context context;
private List<GnssCountryInfo> dataList;
public GnssCountryAdapter(Context _context, List<GnssCountryInfo> _data){
this.dataList = _data;
this.context = _context;
}
@NonNull
@Override
public GnssCountryViewHoder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = View.inflate(context, R.layout.layout_gnss_counrty_item, null);
GnssCountryViewHoder gnssCountryViewHoder = new GnssCountryViewHoder(view);
return gnssCountryViewHoder;
}
@Override
public void onBindViewHolder(@NonNull GnssCountryViewHoder holder, int position) {
GnssCountryInfo itemData = dataList.get(position);
holder.mCountryFlag.setImageResource(itemData.FlagId);
holder.mTitleContent.setText(itemData.TextContext);
}
@Override
public int getItemCount() {
return dataList.size();
}
class GnssCountryViewHoder extends RecyclerView.ViewHolder {
ImageView mCountryFlag;
TextView mTitleContent;
public GnssCountryViewHoder(@NonNull View itemView) {
super(itemView);
mCountryFlag = itemView.findViewById(R.id.iv_item_flag);
mTitleContent = itemView.findViewById(R.id.tv_item_name);
}
}
}
调用:
java
GnssCountryAdapter adapter = new GnssCountryAdapter(this,dataList);
mRecyclerView.setAdapter(adapter);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(layoutManager);
注意:
一定要设置:
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(layoutManager);
否则会出错。
参考链接:
Android RecyclerView最全使用详解-CSDN博客
RecyclerView相关学习资料:
Android开发,使用RecyclerView实现商品列表_安卓recyclerview设备列表-CSDN博客
Android RecyclerView控件_recycleview版本-CSDN博客
RecyclerView之下拉刷新、下拉加载的实现_androidx.recyclerview.widget.recyclerview下拉刷新 底部加载-CSDN博客