Android中RecyclerView上拉下拉,分割线，多条目的实例代码

//activity的xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:id="@+id/activity_main"  android:layout_width="match_parent"  android:layout_height="match_parent"  tools:context="baway.com.cj.myrecyclerview2.MainActivity">  <android.support.v4.widget.SwipeRefreshLayout    android:id="@+id/swipeRefreshLayout"    android:layout_width="match_parent"    android:layout_above="@+id/progress"    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>  <ProgressBar    android:id="@+id/progress"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_centerHorizontal="true"    android:visibility="gone"    android:layout_alignParentBottom="true"/></RelativeLayout>item1的xml和item2的xml就一个背景颜色不同<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:id="@+id/activity_main"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:background="#f00000"  tools:context="baway.com.cj.myrecyclerview2.MainActivity">  <TextView    android:id="@+id/name"    android:layout_width="match_parent"    android:layout_height="50dp"    android:textSize="20sp"    android:gravity="center"    android:textColor="#00ff00"/></RelativeLayout>item2<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:id="@+id/activity_main"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:background="#f000ff"  tools:context="baway.com.cj.myrecyclerview2.MainActivity">  <TextView    android:id="@+id/name"    android:layout_width="match_parent"    android:layout_height="50dp"    android:textSize="20sp"    android:gravity="center"    android:textColor="#00ff00"/></RelativeLayout>//activity,有上啦下拉，添加分割线，package baway.com.cj.myrecyclerview2;import android.graphics.Color;import android.os.Handler;import android.support.v4.widget.SwipeRefreshLayout;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.DefaultItemAnimator;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.Log;import android.view.View;import android.widget.ProgressBar;import android.widget.Toast;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {  private RecyclerView recyclerView;  private MainAdapter mainAdapter;  private SwipeRefreshLayout swipeRefreshLayout;  private LinearLayoutManager linearLayoutManager;  private ProgressBar progress;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initView();    initData();  }  private void initView() {    recyclerView = (RecyclerView)findViewById(R.id.recyclerView);    swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);    progress = (ProgressBar)findViewById(R.id.progress);    linearLayoutManager = new LinearLayoutManager(this);    recyclerView.setLayoutManager(linearLayoutManager);    mainAdapter = new MainAdapter(this);    mainAdapter.setOnClickListener(new MyItemOnClickListener() {      @Override      public void onItemClick(View view, int position) {        Toast.makeText(MainActivity.this, " "+position, Toast.LENGTH_SHORT).show();      }    });    recyclerView.setAdapter(mainAdapter);    recyclerView.addItemDecoration(new MyItemDecoration());    recyclerView.setItemAnimator(new DefaultItemAnimator());    swipeRefreshLayout.setColorSchemeColors(Color.RED,Color.GREEN,Color.BLUE);    swipeRefreshLayout.setProgressViewOffset(true,0,200);    swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {      @Override      public void onRefresh() {        new Handler().postDelayed(new Runnable() {          @Override          public void run() {            swipeRefreshLayout.setRefreshing(false);          }        },3000);      }    });    recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {      @Override      public void onScrolled(RecyclerView recyclerView, int dx, int dy) {        super.onScrolled(recyclerView, dx, dy);        int lastVisibleItemPosition = linearLayoutManager.findLastVisibleItemPosition();        int itemCount = linearLayoutManager.getItemCount();        if (lastVisibleItemPosition + 1 >= itemCount && dy > 0) {          progress.setVisibility(View.VISIBLE);          new Handler().postDelayed(new Runnable() {            @Override            public void run() {              progress.setVisibility(View.GONE);            }          },3000);        }      }      @Override      public void onScrollStateChanged(RecyclerView recyclerView, int newState) {        super.onScrollStateChanged(recyclerView, newState);      }    });  }  private void initData() {    ArrayList<String> strings = new ArrayList<>();    for (int i = 0; i < 50; i++) {      strings.add("name "+i);    }    mainAdapter.setData(strings);    mainAdapter.notifyDataSetChanged();  }}//adpter有多条目展示package baway.com.cj.myrecyclerview2;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.ArrayList;/** * Created by cj on 2017/1/12. */public class MainAdapter extends RecyclerView.Adapter {  private Context context;  private ArrayList<String> datas = new ArrayList<>();  private MyItemOnClickListener myItemOnClickListener;  private final int TYPE_0 = 0;  private final int TYPE_1 = 1;  public MainAdapter(Context context) {    this.context = context;  }  @Override  public int getItemViewType(int position) {    if (position %3 == 0) {      return TYPE_0;    } else {      return TYPE_1;    }  }  public void setOnClickListener(MyItemOnClickListener onClickListener) {    this.myItemOnClickListener = onClickListener;  }  @Override  public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {    if (viewType == TYPE_0) {      View inflate = LayoutInflater.from(context).inflate(R.layout.item_main, null);      return new MyViewHolder(inflate);    } else {      View inflate = LayoutInflater.from(context).inflate(R.layout.item_main2, null);      return new MyViewHolder2(inflate);    }  }  @Override  public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {    if (getItemViewType(position) == TYPE_0) {      MyViewHolder myViewHolder = (MyViewHolder)holder;      myViewHolder.name.setText(datas.get(position));      myViewHolder.name.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {          myItemOnClickListener.onItemClick(v,position);        }      });    } else {      MyViewHolder2 myViewHolder = (MyViewHolder2)holder;      myViewHolder.name.setText(datas.get(position));      myViewHolder.name.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {          myItemOnClickListener.onItemClick(v,position);        }      });    }  }  @Override  public int getItemCount() {    return datas.size();  }  public void setData(ArrayList<String> data) {    if (data == null) {      return;    }    this.datas.addAll(data);  }  public class MyViewHolder extends RecyclerView.ViewHolder{    public TextView name;    public MyViewHolder(View itemView) {      super(itemView);      name = (TextView) itemView.findViewById(R.id.name);    }  }  public class MyViewHolder2 extends RecyclerView.ViewHolder{    public TextView name;    public MyViewHolder2(View itemView) {      super(itemView);      name = (TextView) itemView.findViewById(R.id.name);    }  }}//自定义分割线继承系统的 RecyclerView.ItemDecorationpackage baway.com.cj.myrecyclerview2;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.support.v7.widget.RecyclerView;import android.util.Log;import android.view.View;/** * Created by cj on 2017/1/12. */public class MyItemDecoration extends RecyclerView.ItemDecoration {  private Paint paint;  public MyItemDecoration() {    paint = new Paint();    paint.setColor(Color.BLUE);  }  @Override  public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {    super.onDraw(c, parent, state);    //c.drawCircle(300,300,300,paint);    int childCount = parent.getChildCount();    for (int i = 0; i < childCount; i++) {      View childAt = parent.getChildAt(i);      c.drawRect(childAt.getLeft(),childAt.getBottom(),childAt.getWidth()+childAt.getLeft(),childAt.getBottom()+5,paint);    }  }  @Override  public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {    super.onDrawOver(c, parent, state);//    int childCount = parent.getChildCount();//    for (int i = 0; i < childCount; i++) {//      View childAt = parent.getChildAt(i);//      c.drawRect(childAt.getLeft(),childAt.getTop(),childAt.getWidth()+childAt.getLeft(),childAt.getBottom()+5,paint);//    }  }  @Override  public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {    super.getItemOffsets(outRect, view, parent, state);    outRect.set(20,0,20,5);  }}