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CardViewcompile '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.PtrClassicFrameLayoutandroid: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.RecyclerViewandroid: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.CardViewxmlns: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"><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"><TextViewandroid: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；@Overridepublic NormalViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {return new NormalViewHolder(mLayoutInflater.inflate(R.layout.rv_item,parent,false));}@Overridepublic void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {NormalViewHolder viewholder = (NormalViewHolder) holder;viewholder.mTextView.setText(mTitle.get(position));}//获取数据的数量@Overridepublic int getItemCount() {return mTitle==null ? 0 : mTitle.size();}}

public class MainActivity extends AppCompatActivity {private RecyclerView mRecyclerView;//支持下拉刷新的ViewGroupprivate PtrClassicFrameLayout mPtrFrame;//List数据private List<String> title = new ArrayList<>();//RecyclerView自定义Adapterprivate RvAdapter adapter;//添加Header和Footer的封装类private RecyclerAdapterWithHF mAdapter;@Overrideprotected 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 falsemPtrFrame.setPullToRefresh(false);// default is truemPtrFrame.setKeepHeaderWhenRefresh(true);//进入Activity就进行自动下拉刷新mPtrFrame.postDelayed(new Runnable() {@Overridepublic void run() {mPtrFrame.autoRefresh();}}, 100);//下拉刷新mPtrFrame.setPtrHandler(new PtrDefaultHandler() {@Overridepublic 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() {@Overridepublic void loadMore() {//模拟联网延迟更新数据new Handler().postDelayed(new Runnable() {@Overridepublic 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);}});}}