关于RecyclerView（一）
作者：互联网
前言
最近在项目中用到了ListView，不知道为什么总是出现数据错乱的情况，所以改成了RecyclerView。
简单使用
- RecyclerView使用的时候需要引入依赖
implementation 'com.android.support:recyclerview-v7:28.0.0'
后面的版本号根据自己的项目版本更改，引入完成之后点击上面的Sync Now。
- 在activity中添加控件
<android.support.v7.widget.RecyclerView
android:id="@+id/focus_list_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="10dp"></android.support.v7.widget.RecyclerView>
- 编写item.xml布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_marginBottom="5dp"
android:layout_marginTop="4dp"
android:background="#fff"
android:orientation="horizontal">
<com.onepilltest.others.SwipeMenu
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/focus_list_show"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="3"
android:gravity="center_vertical">
<ImageView
android:layout_marginLeft="20dp"
android:id="@+id/focus_list_item_img"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerInParent="true"
android:layout_marginRight="10dp"
android:scaleType="centerCrop"
android:src="@drawable/user">
</ImageView>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="7"
android:gravity="center"
android:orientation="vertical"
android:paddingLeft="5dp">
<TextView
android:id="@+id/focus_list_item_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="7dp"
android:gravity="left"
android:text="李四 18831107935" />
<TextView
android:id="@+id/focus_list_item_tag"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="left"
android:text="河北师范大学软件学院302" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="65dp"
android:layout_weight="3"
android:gravity="center">
<ImageView
android:id="@+id/focus_list_item_add"
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_gravity="center"
/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="160dp"
android:layout_height="match_parent">
<TextView
android:id="@+id/focus_list_adds"
android:layout_width="80dp"
android:layout_height="match_parent"
android:background="#f70"
android:gravity="center"
android:text="查看"
android:textColor="#ffffff"
android:textSize="14sp" />
<TextView
android:id="@+id/focus_list_dels"
android:layout_width="80dp"
android:layout_height="match_parent"
android:background="@color/holo_red_light"
android:gravity="center"
android:text="取消关注"
android:textColor="#ffffff"
android:textSize="14sp" />
</LinearLayout>
</com.onepilltest.others.SwipeMenu>
</LinearLayout>
- 创建Adapter
package com.onepilltest.personal;
import android.content.Context;
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import com.onepilltest.R;
import com.onepilltest.URL.Connect;
import com.onepilltest.entity.ToFocus;
import com.onepilltest.entity.focus;
import com.onepilltest.index.DoctorDetailsActivity;
import com.onepilltest.index.FoundDoctorActivity;
import java.util.List;
public class FocusListAdapter2 extends RecyclerView.Adapter<FocusListAdapter2.ViewHolder> {
private List<ToFocus> focusList;
public FocusListAdapter2(List<ToFocus> baseList) {
focusList = baseList;
for(ToFocus f:focusList){
Log.e("focus数据源",""+f.toString());
}
}
static class ViewHolder extends RecyclerView.ViewHolder{
ImageView img ;
TextView name;
TextView more;
TextView add;
TextView del;
public ViewHolder(@NonNull View itemView) {
super(itemView);
img = itemView.findViewById(R.id.focus_list_item_img);
name = itemView.findViewById(R.id.focus_list_item_name);
more = itemView.findViewById(R.id.focus_list_item_tag);
add = itemView.findViewById(R.id.focus_list_adds);
del = itemView.findViewById(R.id.focus_list_dels);
}
}
private Context mContext;
// //点击和长按
// public interface OnItemClickListener {
// void onClick(int position);
// }
// private OnItemClickListener listener;
// public void setOnItemClickListener(OnItemClickListener listener) {
// this.listener = listener;
// }
//
// public interface OnItemLongClickListener {
// void onClick(int position);
// }
// private OnItemLongClickListener longClickListener;
// public void setOnItemLongClickListener(OnItemLongClickListener longClickListener) {
// this.longClickListener = longClickListener;
// }
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.focus_liste_item,viewGroup,false);
mContext = viewGroup.getContext();
ViewHolder holder = new ViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
ToFocus focus = focusList.get(i);
//加载头像
RequestOptions requestOptions = new RequestOptions().circleCrop();
Glide.with(mContext)
.load(Connect.BASE_URL + focus.getImg())
.apply(requestOptions)
.into(viewHolder.img);
viewHolder.name.setText(focus.getName());
viewHolder.more.setText(focus.getMore());
viewHolder.add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.e("focusAdapter","查看第"+i+"条数据");
Toast.makeText(mContext,"查看第"+i+"条数据,Type:"+focus.toString(),Toast.LENGTH_SHORT).show();
if (focus.getType() == 1){
Intent intent = new Intent(mContext, DoctorDetailsActivity.class);
intent.putExtra("id",focus.getTypeId());
mContext.startActivity(intent);
}else{
Intent intent = new Intent(mContext, ProductActivity.class);
intent.putExtra("id",focus.getTypeId());
mContext.startActivity(intent);
}
}
});
viewHolder.del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.e("focusAdapter","删除第"+i+"条数据");
Toast.makeText(mContext,"删除第"+i+"条数据",Toast.LENGTH_SHORT).show();
}
});
}
@Override
public int getItemCount() {
return focusList.size();
}
}
- 在MainActivity中绑定Adapter
recyclerView = findViewById(R.id.focus_list_list);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new FocusListAdapter2(baseList);
recyclerView.setAdapter(adapter);
标签：mContext,com,focus,关于,import,android,RecyclerView,public 来源： https://www.cnblogs.com/charlottepl/p/12811102.html