recycleview的基础Adapter
.封装了一个基础的adapter.,用于recycleview的快捷使用
有BaseAdapter,BaseViewHolder,PAdapter,MainActivity
public abstract class BaseAdapter<T> extends RecyclerView.Adapter<BaseViewHolder> { public List<T> mDatas; public LayoutInflater mLayoutInflater; public Context mContext; public int mLayout; public BaseAdapter(Context context,List<T> datas,int layout){ this.mDatas=datas; this.mContext=context; this.mLayout=layout; mLayoutInflater =LayoutInflater.from(context); } @Override public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view= mLayoutInflater.inflate(mLayout,null,false); return new BaseViewHolder(view); } @Override public void onBindViewHolder(BaseViewHolder holder, int position) { T t =getItem(position); bindData(holder,t); } public T getItem(int position){ return mDatas.get(position); } @Override public int getItemCount() { if(mDatas!=null && mDatas.size()>0){ return mDatas.size(); } return 0; } public List<T> getmData() { return mDatas; } public void clearData(){ if(mDatas.size()>0 && mDatas!=null){ int presize= mDatas.size(); mDatas.clear(); notifyItemRangeRemoved(0,presize); } } public void addData(int position,List<T> datas){ if (datas!=null && datas.size()>0){ mDatas.addAll(datas); notifyItemRangeInserted(position,mDatas.size()); } } public abstract void bindData(BaseViewHolder viewHolder,T t); }
public class BaseViewHolder extends RecyclerView.ViewHolder { public SparseArray<View> views; public BaseViewHolder(View itemView) { super(itemView); views = new SparseArray<>(); } public TextView getTextView(int id){ return findView(id); } public ImageView getImageView(int id){ return findView(id); } public Button getButton(int id){ return findView(id); } private <T extends View> T findView(int id){ View view =views.get(id); if(view==null){ view = itemView.findViewById(id); views.put(id,view); } return (T) view; } }
public class PAdapter extends BaseAdapter<PayBean.Data> { public PAdapter(Context context, List<PayBean.Data> datas) { super(context, datas, R.layout.view_rv_item); } @Override public void bindData(BaseViewHolder viewHolder, final PayBean.Data data) { viewHolder.getTextView(R.id.tv_id).setText(data.getId()); viewHolder.getTextView(R.id.tv_openid).setText(data.getOpenid()); TextView tv_id= viewHolder.getTextView(R.id.tv_id); TextView tv_openid= viewHolder.getTextView(R.id.tv_openid); tv_openid.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(MyApplication.getContext(),data.getOpenid(),Toast.LENGTH_SHORT).show(); } }); } }
public class MainActivity extends AppCompatActivity { private OkHttpHelper httpHelper =OkHttpHelper.getInstance(); private SwipeRefreshLayout swipeRefreshLayout; @ViewInject(R.id.tv) private TextView tv; private RecyclerView mRecyclerView; private ArrayList<String> mDatas=new ArrayList<>(); private MaterialRefreshLayout materialRefreshLayout; private static final int STATE_NORMAL=0; private static final int STATE_REFRESH=1; private static final int STATE_MORE=2; private int state = STATE_NORMAL; private List<PayBean.Data> mData; private int page=1; private int pagesize=20; private int totalpages=0; private PAdapter payAdapter; private static final String TAG = "MainActivity"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mRecyclerView = findViewById(R.id.recycleview); materialRefreshLayout =findViewById(R.id.refresh); initRefreshLayout(); getData(); } private void initRefreshLayout(){ materialRefreshLayout.setLoadMore(true); materialRefreshLayout.setMaterialRefreshListener(new MaterialRefreshListener() { @Override public void onRefresh(MaterialRefreshLayout materialRefreshLayout) { refreshData(); } @Override public void onRefreshLoadMore(MaterialRefreshLayout materialRefreshLayout) { if(page<=totalpages){ loadMoreData(); }else{ Toast.makeText(MyApplication.getContext(),"没有更多内容了",Toast.LENGTH_SHORT).show(); materialRefreshLayout.finishRefreshLoadMore(); } } }); } private void loadMoreData(){ page=++page; state=STATE_MORE; getData(); } private void refreshData(){ page=1; state=STATE_REFRESH; getData(); } private void getData(){ String url=Api.BASE_URL+"&page="+page+"&pagesize="+pagesize; httpHelper.get(url, new BaseHttpCallback() { @Override public void onRequestBefore(Request request) { } @Override public void onSuccess(Response response, String string) { PayBean payBean =JSON.parseObject(string,PayBean.class); page= payBean.getPageindex(); totalpages =payBean.getTotalpages(); mData = payBean.getData(); showData(); } @Override public void onError(Response response, int code, Exception e) { } @Override public void onFailure(Exception e) { } }); } private void showData(){ switch (state){ case STATE_NORMAL: payAdapter = new PAdapter(getApplicationContext(),mData); mRecyclerView.setAdapter(payAdapter); mRecyclerView.setLayoutManager(new LinearLayoutManager(MyApplication.getContext())); /*mRecyclerView.setAdapter(new BaseAdapter<PayBean.Data>(MyApplication.getContext(),mData,R.layout.view_rv_item) { @Override public void bindData(BaseViewHolder viewHolder, final PayBean.Data data) { viewHolder.getTextView(R.id.tv_id).setText(data.getId()); viewHolder.getTextView(R.id.tv_openid).setText(data.getOpenid()); viewHolder.getTextView(R.id.tv_openid).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(MyApplication.getContext(),data.getOpenid(),Toast.LENGTH_SHORT).show(); } }); } });*/ //mRecyclerView.setLayoutManager(new LinearLayoutManager(MyApplication.getContext())); break; case STATE_REFRESH: payAdapter.clearData(); payAdapter.addData(0,mData); mRecyclerView.scrollToPosition(0); materialRefreshLayout.finishRefresh(); break; case STATE_MORE: payAdapter.addData(payAdapter.getmData().size(),mData); mRecyclerView.scrollToPosition(payAdapter.getmData().size()); materialRefreshLayout.finishRefreshLoadMore(); break; default: break; } } }
2个布局文件
activity_main和view_rv_item
main <com.cjj.MaterialRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/refresh" android:layout_width="match_parent" android:layout_height="match_parent" app:wave_height_type="normal" app:isLoadMore="true" app:overlay="true" app:wave_show="true" > <android.support.v7.widget.RecyclerView android:id="@+id/recycleview" android:scrollbars="vertical" android:layout_width="match_parent" android:layout_height="match_parent"/> </com.cjj.MaterialRefreshLayout>
<LinearLayout android:id="@+id/item_layout" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/tv_id" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/tv_openid" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
