购物车实现加减和全选
//自定义view加减实现
public class customview extends RelativeLayout implements View.OnClickListener {
private Button addo;
private Button removeo;
private TextView textview;
private Integer num;
private int postion;
Context context;
List list;
private GoodsAdapter goodsAdapter;
public customview(Context context) {
super(context);
intit(context);
}
public customview(Context context, AttributeSet attrs) {
super(context, attrs);
intit(context);
}
public customview(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
intit(context);
}
public customview(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
intit(context);
}
private void intit(Context context) {
View inflate = View.inflate(context, R.layout.add_bar, null);
addo = inflate.findViewById(R.id.add);
removeo = inflate.findViewById(R.id.remove);
textview = inflate.findViewById(R.id.textview);
addo.setOnClickListener(this);
removeo.setOnClickListener(this);
addView(inflate);
textview.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
num = Integer.parseInt(charSequence.toString());
}
@Override
public void afterTextChanged(Editable editable) {
}
});
}
public void setdata(GoodsAdapter goodsAdapter, List list, int i){
this.goodsAdapter =goodsAdapter;
this.list=list;
postion=i;
textview.setText(list.get(i).getNum());
}
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.add:
num++;
textview.setText(""+num);
list.get(postion).setNum(String.valueOf(num));
mCallBackListener.callBack();
goodsAdapter.notifyItemChanged(postion);
break;
case R.id.remove:
if (num<1){
Toast.makeText(context,"地了",Toast.LENGTH_SHORT).show();
}else {
num--;
textview.setText(""+num);
list.get(postion).setNum(String.valueOf(num));
mCallBackListener.callBack();
goodsAdapter.notifyItemChanged(postion);
}
break;
}
}
private CallBackListener mCallBackListener;
public void setOnCallBack(CallBackListener listener) {
this.mCallBackListener = listener;
}
public interface CallBackListener {
void callBack();
}
}
//自定义加减布局
//商品适配器
public class GoodsAdapter extends RecyclerView.Adapter{ List list; Context context; public GoodsAdapter(Context context,List list) { this.list = list; this.context=context; } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) { ViewHolder viewHolder = new ViewHolder(LayoutInflater.from(context).inflate(R.layout.recyitem_layout, viewGroup, false)); return viewHolder; } @Override public void onBindViewHolder(@NonNull ViewHolder viewHolder, final int i) { viewHolder.name.setText(list.get(i).getTitle()); viewHolder.price.setText(list.get(i).getPrice()); Glide.with(context).load(list.get(i).getImages().split("\\|")[0].replace("https","http")).into(viewHolder.imageviewitem); viewHolder.checkitem.setChecked(list.get(i).isCheck()); viewHolder.checkitem.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton compoundButton, boolean b) { list.get(i).setCheck(b); if (mShopCallBackListener!=null){ mShopCallBackListener.callBack(); } } }); viewHolder.custom.setdata(this,list,i); viewHolder.custom.setOnCallBack(new customview.CallBackListener() { @Override public void callBack() { if (mShopCallBackListener!=null){ mShopCallBackListener.callBack(); } } }); } @Override public int getItemCount() { return list.size(); } public void setAllCheck(boolean isAllcheck){ for (CarBean.DataBean.ListBean listBean:list ) { listBean.setCheck(isAllcheck); } notifyDataSetChanged(); } public class ViewHolder extends RecyclerView.ViewHolder { private final customview custom; private ImageView imageviewitem; private TextView name,price; private CheckBox checkitem; public ViewHolder(@NonNull View itemView) { super(itemView); checkitem= itemView.findViewById(R.id.checkboxitem); imageviewitem= itemView.findViewById(R.id.imageviewItem); price= itemView.findViewById(R.id.textprice); name= itemView.findViewById(R.id.texttitle); custom =itemView.findViewById(R.id.custom); } } private ShopCallBackListener mShopCallBackListener; public void setListener(ShopCallBackListener listener) { this.mShopCallBackListener = listener; } public interface ShopCallBackListener { void callBack(); }
//商家适配器
public class CarAdapter extends RecyclerView.Adapter{ List data; Context context; public CarAdapter(Context context, List data) { this.context=context; this.data=data; } @NonNull @Override public CarAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) { View inflate = LayoutInflater.from(context).inflate(R.layout.car_layout, viewGroup, false); ViewHolder viewHolder = new ViewHolder(inflate); return viewHolder; } @Override public void onBindViewHolder(@NonNull final CarAdapter.ViewHolder viewHolder, final int i) { viewHolder.textView.setText(data.get(i).getSellerName()); LinearLayoutManager linearLayoutManager = new LinearLayoutManager(context); linearLayoutManager.setOrientation(OrientationHelper.VERTICAL); viewHolder.recyviewitem.setLayoutManager(linearLayoutManager); final List list = data.get(i).getList(); final GoodsAdapter goodsAdapter = new GoodsAdapter(context, list); viewHolder.recyviewitem.setAdapter(goodsAdapter); viewHolder.checkBox.setChecked(data.get(i).isCheck()); goodsAdapter.setListener(new GoodsAdapter.ShopCallBackListener() { @Override public void callBack() { if (mShopCallBackListener!=null){ mShopCallBackListener.callBack(data); } List list1 = data.get(i).getList(); boolean ischeckall=true; for (CarBean.DataBean.ListBean bean:list1 ) { if (!bean.isCheck()){ ischeckall=false; break; } viewHolder.checkBox.setChecked(ischeckall); list1.get(i).setCheck(ischeckall); } } }); viewHolder.checkBox.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { data.get(i).setCheck(viewHolder.checkBox.isChecked()); goodsAdapter.setAllCheck(viewHolder.checkBox.isChecked()); } }); } @Override public int getItemCount() { return data.size(); } public class ViewHolder extends RecyclerView.ViewHolder { private CheckBox checkBox; private TextView textView; private final RecyclerView recyviewitem; public ViewHolder(@NonNull View itemView) { super(itemView); checkBox= itemView.findViewById(R.id.check); textView= itemView.findViewById(R.id.text); recyviewitem=itemView.findViewById(R.id.recyviewitem); } } private ShopCallBackListener mShopCallBackListener; public void setListener(ShopCallBackListener listener) { this.mShopCallBackListener = listener; } public interface ShopCallBackListener { void callBack(List list); } }
//最后的选中切换状态改变jiage
public class MainActivity extends AppCompatActivity implements ShopViewInter,View.OnClickListener {
private RecyclerView recyview;
private List data;
private TextView goodssunm;
private TextView sumprice;
private CheckBox checkall;
private CarAdapter carAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ShopPresenterBase shopPresenterBase = new ShopPresenterBase(this);
shopPresenterBase.getShopModel();
recyview = findViewById(R.id.recyview);
goodssunm = findViewById(R.id.sumgoods);
sumprice = findViewById(R.id.sumprice);
checkall = findViewById(R.id.checkall);
checkall.setOnClickListener(this);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
recyview.setLayoutManager(linearLayoutManager);
}
@Override
public void getViewData(Object viewdata) {
CarBean carBean= (CarBean) viewdata;
data = carBean.getData();
carAdapter = new CarAdapter(this, data);
recyview.setAdapter(carAdapter);
carAdapter.setListener(new CarAdapter.ShopCallBackListener() {
@Override
public void callBack(List list) {
double totalPrice = 0;
//勾选商品的数量，不是该商品购买的数量
int num = 0;
//所有商品总数，和上面的数量做比对，如果两者相等，则说明全选
int totalNum = 0;
for (int a=0;a listBeans = list.get(a).getList();
for (int i=0;i list = dataBean.getList();
for (int i=0;i