Android中使用RecyclerView实现下拉刷新和上拉加载

//可选 或者在上面地址中下载library源代码copy到项目里面
compile 'com.chanven.lib:cptr:1.0.0' 
// RecyclerView和CardView
compile 'com.android.support:recyclerview-v7:23.1.1'
compile 'com.android.support:cardview-v7:23.1.1'

<?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="match_parent">
<com.chanven.lib.cptr.PtrClassicFrameLayout
android:id="@+id/rotate_header_list_view_frame"
xmlns:cube_ptr="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#e1e1e1"
cube_ptr:ptr_duration_to_close="200"
cube_ptr:ptr_duration_to_close_header="1000"
cube_ptr:ptr_keep_header_when_refresh="true"
cube_ptr:ptr_pull_to_fresh="false"
cube_ptr:ptr_ratio_of_header_height_to_refresh="1.2"
cube_ptr:ptr_resistance="1.7">
<android.support.v7.widget.RecyclerView
android:background="#ffffff"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rv_list"
/>
</com.chanven.lib.cptr.PtrClassicFrameLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:id="@+id/cv_item"
android:foreground="?android:attr/selectableItemBackground"
card_view:cardCornerRadius="4dp"
card_view:cardElevation="4dp"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv_item_text"
android:text="test"
android:layout_margin="8dp"
/>
</LinearLayout>
</android.support.v7.widget.CardView>

public class RvAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private LayoutInflater mLayoutInflater;
private Context mContext;
private List <String> mTitle;
public RvAdapter(Context context,List<String> title){
mContext=context;
mTitle=title;
mLayoutInflater=LayoutInflater.from(context);
}
//自定义的ViewHolder，持有每个Item的的所有界面元素
public static class NormalViewHolder extends RecyclerView.ViewHolder {
TextView mTextView;
CardView mCardView;
public NormalViewHolder(View itemView) {
super(itemView);
mTextView=(TextView)itemView.findViewById(R.id.tv_item_text);
mCardView=(CardView)itemView.findViewById(R.id.cv_item);
}
}
//在该方法中我们创建一个ViewHolder并返回，ViewHolder必须有一个带有View的构造函数，这个View就是我们Item的根布局，在这里我们使用自定义Item的布局；
@Override
public NormalViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new NormalViewHolder(mLayoutInflater.inflate(R.layout.rv_item,parent,false));
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
NormalViewHolder viewholder = (NormalViewHolder) holder;
viewholder.mTextView.setText(mTitle.get(position));
}
//获取数据的数量
@Override
public int getItemCount() {
return mTitle==null ? 0 : mTitle.size();
}
}

public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
//支持下拉刷新的ViewGroup
private PtrClassicFrameLayout mPtrFrame;
//List数据
private List<String> title = new ArrayList<>();
//RecyclerView自定义Adapter
private RvAdapter adapter;
//添加Header和Footer的封装类
private RecyclerAdapterWithHF mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.rv_list);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(layoutManager);
adapter = new RvAdapter(MainActivity.this, title);
mAdapter = new RecyclerAdapterWithHF(adapter);
mRecyclerView.setAdapter(mAdapter);
mPtrFrame = (PtrClassicFrameLayout) findViewById(R.id.rotate_header_list_view_frame);
//下拉刷新支持时间
mPtrFrame.setLastUpdateTimeRelateObject(this);
//下拉刷新一些设置 详情参考文档
mPtrFrame.setResistance(1.7f);
mPtrFrame.setRatioOfHeaderHeightToRefresh(1.2f);
mPtrFrame.setDurationToClose(200);
mPtrFrame.setDurationToCloseHeader(1000);
// default is false
mPtrFrame.setPullToRefresh(false);
// default is true
mPtrFrame.setKeepHeaderWhenRefresh(true);
//进入Activity就进行自动下拉刷新
mPtrFrame.postDelayed(new Runnable() {
@Override
public void run() {
mPtrFrame.autoRefresh();
}
}, 100);
//下拉刷新
mPtrFrame.setPtrHandler(new PtrDefaultHandler() {
@Override
public void onRefreshBegin(PtrFrameLayout frame) {
title.clear();
//模拟数据
for (int i = 0; i <= 5; i++) {
title.add(String.valueOf(i));
}
//模拟联网 延迟更新列表
new Handler().postDelayed(new Runnable() {
public void run() {
mAdapter.notifyDataSetChanged();
mPtrFrame.refreshComplete();
mPtrFrame.setLoadMoreEnable(true);
}
}, 1000);
}
});
//上拉加载
mPtrFrame.setOnLoadMoreListener(new OnLoadMoreListener() {
@Override
public void loadMore() {
//模拟联网延迟更新数据
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
//模拟数据
for (int i = 0; i <= 5; i++) {
title.add(String.valueOf(i));
}
mAdapter.notifyDataSetChanged();
mPtrFrame.loadMoreComplete(true);
Toast.makeText(MainActivity.this, "load more complete", Toast.LENGTH_SHORT)
.show();
}
}, 1000);
}
});
}
}