XrecyclerView實現上拉載入和下拉重新整理+多條目(MVP獲取資料)
阿新 • • 發佈：2018-12-29
依賴
implementation('com.jcodecraeer:xrecyclerview:1.5.9') {
exclude group: 'com.android.support'
}
implementation 'com.android.support:recyclerview-v7:28.0.0'
圖片載入依賴
implementation 'com.github.bumptech.glide:glide:4.8.0'
Activity
public class ShoppingActivity extends AppCompatActivity implements XRecyclerView.LoadingListener, DataCall<List<Goods>>{ private XRecyclerView xRecyclerView; private GoodsListAdapter goodsListAdapter; private GoodsListPresenter goodsListPresenter = new GoodsListPresenter(this); @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_shopping); //獲取控制元件 xRecyclerView = findViewById(R.id.rv); xRecyclerView.setLoadingListener(this); //建立StaggeredGridLayoutManager StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL); xRecyclerView.setLayoutManager(staggeredGridLayoutManager); //建立介面卡 goodsListAdapter = new GoodsListAdapter(ShoppingActivity.this); xRecyclerView.setAdapter(goodsListAdapter); //載入資料 xRecyclerView.refresh(); } @Override public void onRefresh() { goodsListPresenter.request(true); } @Override public void onLoadMore() { goodsListPresenter.request(false); } @Override public void success(List<Goods> data) { xRecyclerView.refreshComplete(); xRecyclerView.loadMoreComplete(); if (goodsListPresenter.isResresh()) { goodsListAdapter.clearList(); } goodsListAdapter.addAll(data); goodsListAdapter.notifyDataSetChanged(); } @Override public void fail(User user) { Toast.makeText(ShoppingActivity.this, user.getCode() + " " + user.getMsg(), Toast.LENGTH_LONG).show(); } @Override protected void onDestroy() { super.onDestroy(); goodsListPresenter.unBindCall();//防止記憶體洩漏 } }
Presenter（P層）
public class GoodsListPresenter extends BasePresenter { private int page = 1; private boolean isRefresh = true; public GoodsListPresenter(DataCall dataCall) { super(dataCall); } @Override protected User getData(Object... args) { isRefresh = (boolean) args[0];//是否需要重新整理 if (isRefresh) { page = 1; }else { page++; } User user = GoodsListModel.goodsList(page+""); return user; } public boolean isResresh() { return isRefresh; } }
抽象類
public abstract class BasePresenter { DataCall dataCall; public BasePresenter(DataCall dataCall) { this.dataCall = dataCall; } private Handler mHandler = new Handler(Looper.getMainLooper()) { @Override public void handleMessage(Message msg) { User user = (User)msg.obj; if (user.getCode().equals("0")) { dataCall.success(user.getData()); } else { dataCall.fail(user); } } }; /** * activity或者fragment只需關心request方法 * request呼叫抽象方法useModel()方法 */ public void request(final Object... args) { new Thread(new Runnable() { @Override public void run() { Message message = mHandler.obtainMessage(); message.obj = getData(args); mHandler.sendMessage(message); } }).start(); } protected abstract Object getData(Object...args); public void unBindCall(){ this.dataCall = null; } }
Model（M層）
public class GoodsListModel {
public static User goodsList(String page) {
String resultString = Utils.postForm("http://www.zhaoapi.cn/product/getProducts",
new String[]{"pscid","page"},new String[]{"1",page});
Gson gson = new Gson();
Type type = new TypeToken<User<List<Goods>>>(){}.getType();
User user = gson.fromJson(resultString, type);
return user;
}
}
View （V層）
import com.zhao.demo.bean.User;
public interface DataCall<T> {
void success(T data);
void fail(User user);
}
Adapter（介面卡）
public class GoodsListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
public static final int TYPE_RIGHT_IMAGE =0;
public static final int TYPE_THREE_IMAGE = 1;
private List<Goods> mList = new ArrayList<>();
private Context context;
public GoodsListAdapter(Context context) {
this.context = context;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
//判斷條目型別
if (i == TYPE_RIGHT_IMAGE) {
View view = View.inflate(context, R.layout.activity_shopping_item_image, null);
return new GoodHolderView_image(view);
}else {
View view = View.inflate(context, R.layout.activity_shopping_item_text,null);
return new GoodHolderView_Text(view);
}
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int i) {
if (holder instanceof GoodHolderView_image) {
//由於我們的資料圖片提供的不標準，所以我們需要切割得到圖片
String imageurl = "https"+mList.get(i).getImages().split("https")[1];
Log.i("dt","imageUrl: "+imageurl);
imageurl = imageurl.substring(0,imageurl.lastIndexOf(".jpg")+".jpg".length());
Glide.with(context).load(imageurl).into(((GoodHolderView_image) holder).imageView);//載入圖片
}
if (holder instanceof GoodHolderView_Text) {
((GoodHolderView_Text) holder).textView.setText(mList.get(i).getTitle());
String imageurl = "https"+mList.get(i).getImages().split("https")[1];
imageurl = imageurl.substring(0,imageurl.lastIndexOf(".jpg")+".jpg".length());
Glide.with(context).load(imageurl).into(((GoodHolderView_Text) holder).imageView);
}
}
public int getItemCount() {
return mList.size();
}
@Override
public int getItemViewType(int position) {
Goods goods = mList.get(position);
//返回條目型別，可以根據需要返回條目型別，我這就隨意返回了兩種，
return goods.getPid()% 2;
}
public void clearList() {
mList.clear();
}
public void addAll(List<Goods> data) {
//新增資料
mList.addAll(data);
}
class GoodHolderView_image extends RecyclerView.ViewHolder {
ImageView imageView;
public GoodHolderView_image(@NonNull View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.image_item);
}
}
class GoodHolderView_Text extends RecyclerView.ViewHolder {
ImageView imageView;
TextView textView;
public GoodHolderView_Text(@NonNull View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.textView);
imageView = itemView.findViewById(R.id.images);
}
}
}