Reclerview下拉刷新，上拉加载更多

MyCustomeActivity:

1.SwipeRefresh实现下拉刷新

2.添加ItemType为上拉加载更多添加footview，当到达尾部加载更多。

package com.marshalchen.ultimaterecyclerview.demo.aaMyCustome;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.Nullable;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.OrientationHelper;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.marshalchen.ultimaterecyclerview.demo.R;

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

public class MyCustomeActivity extends AppCompatActivity {
private LinearLayout top_bar_linear_back;
private TextView top_bar_title;
private SwipeRefreshLayout demo_swiperefreshlayout;
private RecyclerView demo_recycler;
private RefreshFootAdapter adapter;
private LinearLayoutManager linearLayoutManager;
private int lastVisibleItem;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_custome);
Toast.makeText(getApplicationContext(),"this is a test!",Toast.LENGTH_LONG).show();
demo_swiperefreshlayout = (SwipeRefreshLayout) this.findViewById(R.id.swiperefresh);
demo_recycler = (RecyclerView) this.findViewById(R.id.id_recyclerview);
//设置刷新时动画的颜色，可以设置4个
demo_swiperefreshlayout.setProgressBackgroundColorSchemeResource(android.R.color.white);
demo_swiperefreshlayout.setColorSchemeResources(android.R.color.holo_blue_light,
android.R.color.holo_red_light, android.R.color.holo_orange_light,
android.R.color.holo_green_light);
demo_swiperefreshlayout.setProgressViewOffset(false, 0, (int) TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, getResources()
.getDisplayMetrics()));
linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setOrientation(OrientationHelper.VERTICAL);
demo_recycler.setLayoutManager(linearLayoutManager);
//添加分隔线
//        demo_recycler.addItemDecoration(new AdvanceDecoration(this, OrientationHelper.VERTICAL));
demo_recycler.setAdapter(adapter = new RefreshFootAdapter(this));
demo_swiperefreshlayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
Log.d("zttjiangqq", "invoke onRefresh...");
new Handler().postDelayed(new Runnable() {
@Override
public void run () {
List<String> newDatas = new ArrayList<String>();
for (int i = 0; i < 5; i++) {
int index = i + 1;
newDatas.add("new item" + index);
}
adapter.addItem(newDatas);
demo_swiperefreshlayout.setRefreshing(false);
Toast.makeText(MyCustomeActivity.this, "更新了五条数据...", Toast.LENGTH_SHORT).show();
}
},5000);
}
});
demo_recycler.setOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (newState ==RecyclerView.SCROLL_STATE_IDLE && lastVisibleItem + 1 ==adapter.getItemCount()) {
adapter.changeMoreStatus(RefreshFootAdapter.LOADING_MORE);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
List<String> newDatas = new ArrayList<String>();
for (int i = 0; i< 5; i++) {
int index = i +1;
newDatas.add("more item" + index);
}
adapter.addMoreItem(newDatas);
adapter.changeMoreStatus(RefreshFootAdapter.PULLUP_LOAD_MORE);
}
}, 2500);
}
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView,dx, dy);
lastVisibleItem =linearLayoutManager.findLastVisibleItemPosition();
}
});
}
class CustomOnClickListener implements View.OnClickListener {
@Override
public void onClick (View v){
MyCustomeActivity.this.finish();
}
}
}

RefreshFootAdapter:

package com.marshalchen.ultimaterecyclerview.demo.aaMyCustome;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.marshalchen.ultimaterecyclerview.demo.R;

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

/**
* Created by liuqun on 2017/1/7.
*/

public class RefreshFootAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
//上拉加载更多
public static final int PULLUP_LOAD_MORE = 0;
//正在加载中
public static final int LOADING_MORE = 1;
//上拉加载更多状态-默认为0
private int load_more_status = 0;
private LayoutInflater mInflater;
private List<String> mTitles = null;
private static final int TYPE_ITEM=0;  //普通Item View
private static final int TYPE_FOOTER=1;  //顶部FootView

public RefreshFootAdapter(Context context) {
this.mInflater = LayoutInflater.from(context);
this.mTitles = new ArrayList<String>();
for (int i = 0; i < 20; i++) {
int index = i + 1;
mTitles.add("item" + index);
}
}

/**
* item显示类型
*
* @param parent
* @param viewType
* @return
*/
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
//进行判断显示类型，来创建返回不同的View
if (viewType == TYPE_ITEM) {
View view = mInflater.inflate(R.layout.item_recycler_layout, parent, false);
//这边可以做一些属性设置，甚至事件监听绑定
//view.setBackgroundColor(Color.RED);
ItemViewHolder itemViewHolder = new ItemViewHolder(view);
return itemViewHolder;
} else if (viewType == TYPE_FOOTER) {
View foot_view = mInflater.inflate(R.layout.recycler_load_more_layout, parent, false);
//这边可以做一些属性设置，甚至事件监听绑定
//view.setBackgroundColor(Color.RED);
FootViewHolder footViewHolder = new FootViewHolder(foot_view);
return footViewHolder;
}
return null;
}

/**
* 数据的绑定显示
*
* @param holder
* @param position
*/
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof ItemViewHolder) {
((ItemViewHolder) holder).item_tv.setText(mTitles.get(position));
holder.itemView.setTag(position);
} else if (holder instanceof FootViewHolder) {
FootViewHolder footViewHolder = (FootViewHolder) holder;
switch (load_more_status) {
case PULLUP_LOAD_MORE:
footViewHolder.foot_view_item_tv.setText("上拉加载更多...");
break;
case LOADING_MORE:
footViewHolder.foot_view_item_tv.setText("正在加载更多数据...");
break;
}
}
}

/**
* 进行判断是普通Item视图还是FootView视图
*
* @param position
* @return
*/
@Override
public int getItemViewType(int position) {
// 最后一个item设置为footerView
if (position + 1 == getItemCount()) {
return TYPE_FOOTER;
} else {
return TYPE_ITEM;
}
}

@Override
public int getItemCount() {
return mTitles.size() + 1;
}

//自定义的ViewHolder，持有每个Item的的所有界面元素
public static class ItemViewHolder extends RecyclerView.ViewHolder {
public TextView item_tv;

public ItemViewHolder(View view) {
super(view);
item_tv = (TextView) view.findViewById(R.id.item_tv);
}
}

/**
* 底部FootView布局
*/
public static class FootViewHolder extends RecyclerView.ViewHolder {
private TextView foot_view_item_tv;

public FootViewHolder(View view) {
super(view);
foot_view_item_tv = (TextView) view.findViewById(R.id.foot_view_item_tv);
}
}

//添加数据
public void addItem(List<String> newDatas) {
//mTitles.add(position, data);
//notifyItemInserted(position);
newDatas.addAll(mTitles);
mTitles.removeAll(mTitles);
mTitles.addAll(newDatas);
notifyDataSetChanged();
}

public void addMoreItem(List<String> newDatas) {
mTitles.addAll(newDatas);
notifyDataSetChanged();
}

/**
* //上拉加载更多
* PULLUP_LOAD_MORE=0;
* //正在加载中
* LOADING_MORE=1;
* //加载完成已经没有更多数据了
* NO_MORE_DATA=2;
*
* @param status
*/
public void changeMoreStatus(int status) {
load_more_status = status;
notifyDataSetChanged();
}
}

item_recycler_layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/holo_green_light"
>
<TextView
android:gravity="center"
android:id="@+id/item_tv"
android:textColor="@android:color/white"
android:padding="5dp"
android:textSize="16sp"
android:text="Text数据显示..."
android:layout_width="match_parent"
android:layout_height="60dp"
/>
</LinearLayout>

recycler_load_more_layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="45dp"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="45dp"
android:orientation="horizontal"
android:gravity="center">
<ProgressBar
android:layout_width="25dp"
android:layout_height="25dp"
/>
<TextView
android:id="@+id/foot_view_item_tv"
android:layout_marginLeft="4dp"
android:text="上拉加载更多..."
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>