安卓高级3 RecyclerView结合SwipeRefreshLayout并添加上拉

目录结构:

效果图:

MainActivity.java

package qianfeng.com.pullrecyclerviewdemo;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

    private SwipeRefreshLayout swipeLayout;
    private RecyclerView recyclerView;
    private List<String> total = new ArrayList<>();
    private MyAdapter myAdapter;
    boolean isReferencing;
    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case 100:
                    isReferencing = false;
                    swipeLayout.setRefreshing(false);
                    myAdapter.notifyDataSetChanged();
                    break;
                case 200:
                    isReferencing = false;
                    // 添加数据结束后    将  空的那条数据   移除  在刷新
                    total.remove("");
                    myAdapter.notifyDataSetChanged();
                    break;

            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swipeLayout);

        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);

        final LinearLayoutManager manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        recyclerView.setLayoutManager(manager);
        initData();
        myAdapter = new MyAdapter(total, this);
        recyclerView.setAdapter(myAdapter);

        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
            }

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                int lastVisibleItemPosition = manager.findLastVisibleItemPosition();
                if (lastVisibleItemPosition == myAdapter.getItemCount() - 1) {
                    isReferencing = swipeLayout.isRefreshing();
                    if (!isReferencing) {

                        isReferencing = true;
                        initData();
                        handler.sendEmptyMessageDelayed(200, 3000);
                        Toast.makeText(MainActivity.this, "最后拉 ，不要在向下了", Toast.LENGTH_SHORT).show();
                    }
                }
            }
        });

        swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {

                new Thread() {
                    @Override
                    public void run() {
                        super.run();
                        try {
                            Thread.sleep(3000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        total.clear();
                        initData();
                        handler.sendEmptyMessage(100);
                    }
                }.start();
            }
        });

    }

    private void initData() {
        for (int i = 0; i < 50; i++) {
            total.add("都别睡觉啊～  逮住" + i);
        }
        // 每次加载数据的时候添加一条空数据  作为   footerView 展示的 itemView
        total.add("");
    }

    public void onClick(View view) {
//        myAdapter.delete(2);
    }
}

MyAdapter.java

package qianfeng.com.pullrecyclerviewdemo;

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 java.util.List;

/**
 * Created by ${Mr.Zhao} on 2016/10/19.
 */
public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private List<String> list;
    LayoutInflater inflater;
    //1. 定义两种类型
    private final int TYPE_FOOTER_VIEW = 0;
    private final int TYPE_ITEM_VIEW = 1;

    public MyAdapter(List<String> list, Context context) {
        this.list = list;
        inflater = LayoutInflater.from(context);
    }

    @Override
    public int getItemViewType(int position) {
        if (position == getItemCount() - 1)
            return TYPE_FOOTER_VIEW;
        return TYPE_ITEM_VIEW;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType == TYPE_ITEM_VIEW) {
            View view = inflater.inflate(R.layout.item_layout, parent, false);
            return new MyViewHolder(view);
        } else {
            View view = inflater.inflate(R.layout.footer_layout, parent, false);
            return new FooterViewHolder(view);
        }
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof MyViewHolder) {
            ((MyViewHolder) holder).item_tv.setText(list.get(position));
        }
    }

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

    class MyViewHolder extends RecyclerView.ViewHolder {
        TextView item_tv;

        public MyViewHolder(View itemView) {
            super(itemView);
            item_tv = (TextView) itemView.findViewById(R.id.item_tv);
        }
    }

    class FooterViewHolder extends RecyclerView.ViewHolder {

        public FooterViewHolder(View itemView) {
            super(itemView);
        }
    }

    //  待验证
//    public void delete(int position) {
//        notifyItemRemoved(position);
//    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="qianfeng.com.pullrecyclerviewdemo.MainActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="删除" />

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>

    </android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>

footer_layout.xml

<?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="wrap_content"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="10dp"
        android:text="加载更多"
        android:textColor="@android:color/black"
        android:textSize="20sp" />
</LinearLayout>

item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10dp"
    android:foreground="?android:attr/selectableItemBackground"
    android:orientation="vertical"
    app:cardBackgroundColor="@android:color/holo_blue_light"
    app:cardCornerRadius="10dp"
    app:cardElevation="10dp">

    <TextView
        android:id="@+id/item_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginBottom="30dp"
        android:layout_marginTop="30dp"
        android:textColor="@android:color/white"
        android:textSize="20sp" />

</android.support.v7.widget.CardView>