//自定义加减器
public class SubAddButton extends LinearLayout {
private View root;
private TextView tvSub,tvNum,tvAdd;
private OnNumChangedListener numChangedListener;
//new 调用
public SubAddButton(Context context) {
this(context, null);
}
// xml 使用的时候
public SubAddButton(Context context, AttributeSet attrs) {
this(context, attrs, -1);
}
// 指定的时候
public SubAddButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
initListener();
}
private void init(Context context){
root = View.inflate(context,R.layout.layout_sub_add,this);
// root = LayoutInflater.from(context).inflate(R.layout.layout_sub_add,this,true);
tvSub = root.findViewById(R.id.tvSub);
tvNum = root.findViewById(R.id.tvNum);
tvAdd = root.findViewById(R.id.tvAdd);
}
private void initListener() {
tvSub.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
sub();
}
});
tvAdd.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
add();
}
});
}
private void add(){
String cur = tvNum.getText().toString();
int newNum = 0;
if (!TextUtils.isEmpty(cur) && !cur.contains(".")){ // 非空验证
newNum = Integer.parseInt(cur);
newNum++;
}
tvNum.setText(newNum + "");
if (numChangedListener != null){
numChangedListener.onNumChanged(Integer.valueOf(cur),newNum);
}
}
private void sub(){
String cur = tvNum.getText().toString();
int newNum = 0;
if (!TextUtils.isEmpty(cur) && !cur.contains(".")){
newNum = Integer.parseInt(cur);
newNum--;
}
if (newNum < 0){
newNum = 0;
Toast.makeText(getContext(),"最小数量为0",Toast.LENGTH_SHORT).show();
tvNum.setText(newNum + "");
}else {
tvNum.setText(newNum + "");
if (numChangedListener != null){
numChangedListener.onNumChanged(Integer.valueOf(cur),newNum);
}
}
}
public int getNumber(){
String newNumber = tvNum.getText().toString();
if (!TextUtils.isEmpty(newNumber) && !newNumber.contains(".")){
return Integer.parseInt(newNumber);
}
return 0;
}
public void setNum(int newNumber){
if (newNumber > 0){
tvNum.setText(newNumber + "");
}else {
Toast.makeText(getContext(),"最小数量为0",Toast.LENGTH_SHORT).show();
}
}
public void setNumChangedListener(OnNumChangedListener numChangedListener){
this.numChangedListener = numChangedListener;
}
public interface OnNumChangedListener{
void onNumChanged(int old, int number);
}
}
//Activity页面的逻辑及代码
public class MainActivity extends AppCompatActivity implements ShopCarModel.CallBackListener {
private RecyclerView recyclerView;
private ShopCarAdapter shopCarAdapter;
private ShopCarModel shopCarModel;
private CheckBox cbCheckAll;
private TextView tvTotalPrice;
private TextView tvTotalNumb;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initListener();
initData();
}
private void initView() {
//在需要接受事件的类中进行注册
EventBus.getDefault().register(this);
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(linearLayoutManager);
shopCarAdapter = new ShopCarAdapter();
recyclerView.setAdapter(shopCarAdapter);
cbCheckAll = findViewById(R.id.cbCheckAll);
tvTotalPrice = findViewById(R.id.tvTotalPrice);
tvTotalNumb = findViewById(R.id.tvTotalNumb);
}
private void initListener() {
cbCheckAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
checkAllOrNot(isChecked);
}
});
}
private void initData() {
shopCarModel = new ShopCarModel();
shopCarModel.getShopCarData(this);
}
@Override
public void success(String data) {
ShopCarResponse response = new Gson().fromJson(data, ShopCarResponse.class);
shopCarAdapter.setresult(response.getData());
}
private void checkAllOrNot(boolean isCheck) {
List<MerchantResponse> listData = shopCarAdapter.getListData();
for (int i = 0; i < listData.size(); i++) {
MerchantResponse response = listData.get(i);
response.setChecked(isCheck);
List<GoodsEntity> spus = response.getSpus();
for (int j = 0; j < spus.size(); j++) {
GoodsEntity goodsEntity = spus.get(j);
goodsEntity.setChecked(isCheck);
}
}
shopCarAdapter.notifyDataSetChanged();
caculatePrice();
}
private void caculatePrice(){
List<MerchantResponse> listData = shopCarAdapter.getListData();
int total = 0;
int totalCount = 0;
for (int i =0;i<listData.size();i++){
MerchantResponse merchantResponse = listData.get(i);
List<GoodsEntity> spus = merchantResponse.getSpus();
for (int j=0;j<spus.size();j++){
GoodsEntity goodsEntity = spus.get(j);
if (goodsEntity.isChecked()){
String price = goodsEntity.getSkus().get(0).getPrice();
int num = goodsEntity.getPraise_num();
total += Double.valueOf(price) * num;
totalCount += num;
}
}
}
tvTotalNumb.setText("商品数量："+totalCount);
tvTotalPrice.setText("总价："+total+"元");
}
/**
* 响应事件的方法
* @param event 任意自定义的java类即可
* 注解固定写法
* 方法名 任意
* 方法修饰 public void
*
*/
@Subscribe
public void onCaculateEvent(CaculateEvent event){
int parentPosition = event.getParentPosition();
int selfPosition = event.getSelfPosition();
List<MerchantResponse> listData = shopCarAdapter.getListData();
if (parentPosition != -1){
MerchantResponse merchantResponse = listData.get(parentPosition);
List<GoodsEntity> spus = merchantResponse.getSpus();
if (selfPosition != -1){
GoodsEntity goodsEntity = spus.get(selfPosition);
goodsEntity.setPraise_num(event.getNewNum());
if(goodsEntity.isChecked()){
caculatePrice();
}
}
}
}
@Subscribe
public void onGroupEvent(GroupEvent event){
int groupPosition = event.getGroupPosition();
List<MerchantResponse> listData = shopCarAdapter.getListData();
MerchantResponse merchantResponse = listData.get(groupPosition);
merchantResponse.setChecked(event.isChecked());
List<GoodsEntity> spus = merchantResponse.getSpus();
for (int i=0;i<spus.size();i++){
GoodsEntity goodsEntity = spus.get(i);
goodsEntity.setChecked(event.isChecked());
}
shopCarAdapter.notifyDataSetChanged();
caculatePrice();
}
@Subscribe
public void onSingleEvent(SingleEvent event){
int parentPosition = event.getParentPosition();
int selfPosition = event.getSelfPosition();
List<MerchantResponse> listData = shopCarAdapter.getListData();
MerchantResponse merchantResponse = listData.get(parentPosition);
List<GoodsEntity> spus = merchantResponse.getSpus();
GoodsEntity goodsEntity = spus.get(selfPosition);
goodsEntity.setChecked(event.isChecked());
shopCarAdapter.notifyDataSetChanged();
caculatePrice();
}
@Override
protected void onDestroy() {
super.onDestroy();
//在必要的时候反注册
EventBus.getDefault().unregister(this);
}
}
//购物车的适配器
public class ShopCarAdapter extends RecyclerView.Adapter<ShopCarAdapter.MyViewHolder> {
private List<MerchantResponse> listData = new ArrayList();
public List<MerchantResponse> getListData() {
return listData;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View item = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_shop_car, viewGroup, false);
return new MyViewHolder(item);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, int i) {
MerchantResponse merchantResponse = listData.get(i);
myViewHolder.bind(merchantResponse);
}
@Override
public int getItemCount() {
return listData.size();
}
public void setresult(List<MerchantResponse> listData) {
this.listData = listData;
notifyDataSetChanged();
}
class MyViewHolder extends RecyclerView.ViewHolder{
private CheckedTextView tvShopName;
private CheckBox cbShopCheck;
private RecyclerView recyclerViewGoods;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
tvShopName = itemView.findViewById(R.id.tvShopName);
cbShopCheck = itemView.findViewById(R.id.cbShopCheck);
recyclerViewGoods = itemView.findViewById(R.id.recyclerViewGoods);
cbShopCheck.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
EventBus.getDefault().post(new GroupEvent(getAdapterPosition(),isChecked));
}
});
}
private void bind(MerchantResponse merchantResponse){
String name = merchantResponse.getName();
tvShopName.setText(name);
cbShopCheck.setChecked(merchantResponse.isChecked());
List<GoodsEntity> spus = merchantResponse.getSpus();
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(itemView.getContext());
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerViewGoods.setLayoutManager(linearLayoutManager);
int adapterPosition = getAdapterPosition();
recyclerViewGoods.setAdapter(new GoodsAdapter(spus,adapterPosition));
}
}
}
//购物车中商品的适配器
public class GoodsAdapter extends RecyclerView.Adapter<GoodsAdapter.MyViewHolder> {
List<GoodsEntity> listData = new ArrayList<>();
private int parentPosition = -1;
public GoodsAdapter(List<GoodsEntity> listData, int parentPosition) {
this.listData = listData;
this.parentPosition = parentPosition;
}
@NonNull
@Override
public GoodsAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View item = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_goods, viewGroup, false);
return new GoodsAdapter.MyViewHolder(item);
}
@Override
public void onBindViewHolder(@NonNull GoodsAdapter.MyViewHolder myViewHolder, int i) {
GoodsEntity goodsEntity = listData.get(i);
myViewHolder.bind(goodsEntity);
}
@Override
public int getItemCount() {
return listData.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private TextView tvGoodsName,tvGoodsPrice;
private ImageView ivGoodsPic;
private CheckBox cbGoodsCheck;
private SubAddButton subAddButton;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
tvGoodsName = itemView.findViewById(R.id.tvGoodsName);
tvGoodsPrice = itemView.findViewById(R.id.tvGoodsPrice);
ivGoodsPic = itemView.findViewById(R.id.ivGoodPic);
cbGoodsCheck = itemView.findViewById(R.id.cbGoodsCheck);
subAddButton = itemView.findViewById(R.id.btnSubAndAdd);
subAddButton.setNumChangedListener(new SubAddButton.OnNumChangedListener() {
@Override
public void onNumChanged(int old, int number) {
//发送事件，注册了本事件的地方会自动响应
int selfPosition = getAdapterPosition();
EventBus.getDefault().post(new CaculateEvent(parentPosition,selfPosition,number));
}
});
cbGoodsCheck.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
EventBus.getDefault().post(new SingleEvent(isChecked,parentPosition,getAdapterPosition()));
}
});
}
private void bind(GoodsEntity entity){
cbGoodsCheck.setChecked(entity.isChecked());
tvGoodsName.setText(entity.getName());
tvGoodsPrice.setText(entity.getSkus().get(0).getPrice());
subAddButton.setNum(entity.getPraise_num());
Glide.with(itemView.getContext()).load(entity.getPic_url()).into(ivGoodsPic);
}
}
}
//三个EventBus的bean类
public class CaculateEvent {
private int parentPosition = -1;
private int selfPosition = -1;
private int newNum = -1;
public CaculateEvent(int parentPosition, int selfPosition, int newNum) {
this.parentPosition = parentPosition;
this.selfPosition = selfPosition;
this.newNum = newNum;
}
public int getParentPosition() {
return parentPosition;
}
public int getSelfPosition() {
return selfPosition;
}
public int getNewNum() {
return newNum;
}
}
public class GroupEvent {
private int groupPosition;
private boolean isChecked;
public GroupEvent(int groupPosition, boolean isChecked) {
this.groupPosition = groupPosition;
this.isChecked = isChecked;
}
public int getGroupPosition() {
return groupPosition;
}
public boolean isChecked() {
return isChecked;
}
}
public class SingleEvent {
private boolean isChecked;
private int parentPosition;
private int selfPosition;
public SingleEvent(boolean isChecked, int parentPosition, int selfPosition) {
this.isChecked = isChecked;
this.parentPosition = parentPosition;
this.selfPosition = selfPosition;
}
public boolean isChecked() {
return isChecked;
}
public int getParentPosition() {
return parentPosition;
}
public int getSelfPosition() {
return selfPosition;
}
}