Question

我为每件商品longClick采用click和longClick方法，选择商品以RecycleViewAdapter开头，然后单击允许用户选择，如您所见所选项目的背景颜色会发生变化，现在我需要再做一件事，当用户按下按钮时我想清除此选项并将背景更改为透明，这里是public class Channel_Show_Adapter extends RecyclerView.Adapter<Channel_Show_Adapter.ViewHolder> { private Context mContext; private ArrayList<Channel_Show_Model> Data_1; private static String TAG = "val"; public onLongClickInterface longClick; public onClickInterface shortClick; private boolean longClickDone; private boolean shortClickActivated=false; public Channel_Show_Adapter(Context mContext, ArrayList<Channel_Show_Model> data, onLongClickInterface click1, onClickInterface click2) { this.mContext = mContext; this.Data_1 = data; this.longClick = click1; this.shortClick = click2; } public class ViewHolder extends RecyclerView.ViewHolder implements View.OnLongClickListener, View.OnClickListener { AppCompatImageView image; TextView title, text, date, user; RelativeLayout singlePostLayout; public ViewHolder(View itemView) { super(itemView); image = (AppCompatImageView) itemView.findViewById(R.id.ch_msg_image); title = (TextView) itemView.findViewById(R.id.ch_msg_title); text = (TextView) itemView.findViewById(R.id.ch_msg_message); date = (TextView) itemView.findViewById(R.id.ch_msg_date); user = (TextView) itemView.findViewById(R.id.ch_msg_user); singlePostLayout = (RelativeLayout) itemView.findViewById(R.id.channel_single_post_layout); itemView.setOnLongClickListener(this); itemView.setOnClickListener(this); } @Override public boolean onLongClick(View v) { if(!shortClickActivated) { singlePostLayout.setBackgroundColor(mContext.getResources().getColor(R.color.blueTransparent)); longClick.posClickedLong((short) getAdapterPosition()); longClickDone = true; shortClickActivated=true; } return true; } @Override public void onClick(View v) { if(longClickDone) { singlePostLayout.setBackgroundColor(mContext.getResources().getColor(R.color.blueTransparent)); shortClick.posClickedShort((short) getAdapterPosition()); shortClickActivated=true; } } } @Override public Channel_Show_Adapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = LayoutInflater.from(mContext).inflate(R.layout.channel_show_recycler, parent, false); return new Channel_Show_Adapter.ViewHolder(view); } @Override public void onBindViewHolder(final Channel_Show_Adapter.ViewHolder holder, int position) { holder.title.setText(Data_1.get(position).getTitle()); holder.text.setText(Data_1.get(position).getMessage()); holder.date.setText(Data_1.get(position).getDate()); if (Application_Class.userDataArray.get(0).isSuperAdmin() || Application_Class.userDataArray.get(0).isAdmin()) { holder.user.setText(Data_1.get(position).getUser()); } else { holder.user.setText(""); } Picasso.get().load(Data_1.get(position).getImage().getUrl()).noFade().into(holder.image); } @Override public int getItemCount() { return Data_1.size(); } interface onLongClickInterface{void posClickedLong(short p);} interface onClickInterface{void posClickedShort(short p);} }

   @Override
public void posClickedLong(short p) {

    longClickOk=true;
    itemsTempArray.add(data.get(p).getId());

}
@Override
public void posClickedShort(short p) {

    itemsTempArray.add(data.get(p).getId());


}

@Override
public void onBackPressed() {

    backPressed=true;
    if(longClickOk && itemsTempArray.size()>0){
        longClickOk=false;
        for (int i = 0; i < itemsTempArray.size(); i++)
                itemsTempArray.remove(i);

    }else{
        super.onBackPressed();
    }

}

和活动

billing models.py

from django.conf import settings
from django.db import models
from django.db.models.signals import post_save,pre_save
from accounts.models import GuestEmail
import stripe

User=settings.AUTH_USER_MODEL


STRIP_SECRET_KEY= getattr(settings,"STRIP_SECRET_KEY","sk_test_I2eGCibhrZeFd9N0ipx9ac4I")
#STRIP_PUB_KEY=getattr(settings,"STRIP_PUB_KEY","pk_test_nvw3qh6iGMtKSGHMW5MHVwQD")
stripe.api_key=STRIP_SECRET_KEY

class BillingProfileManager(models.Manager):
    def new_or_get(self,request):
        user=request.user
        guest_email_id=request.session.get('guest_email_id')
        created=False
        obj=None
        if user.is_authenticated:
            obj,created= self.model.objects.get_or_create(
                                    user=user, email=user.email)

        elif guest_email_id is not None:
            guest_email_obj = GuestEmail.objects.get(id=guest_email_id)
            obj, created = self.model.objects.get_or_create(
                                    email=guest_email_obj.email)
        else:
            pass
        return obj,created

class BillingProfile(models.Model):
    user=models.OneToOneField(User,null=True,blank=True,on_delete=models.CASCADE)
    email=models.EmailField()
    active=models.BooleanField(default=True)
    update = models.DateTimeField(auto_now=True)
    timestamp=models.DateTimeField(auto_now_add=True)
    customer_id=models.CharField(max_length=120,null=True,blank=True)

    objects=BillingProfileManager()

    def __str__(self):
        return self.email

    def charge(self,order_obj,card=None):
        return Charge.objects.do(self,order_obj,card)

    def get_cards(self):
        return self.card_set.all()

    @property
    def has_card(self):
        card_qs=self.get_cards()
        return  card_qs.exists()

    @property
    def default_card(self):
        default_cards=self.get_cards().filter(default=True)
        if default_cards.exists():
            return self.default_cards.first()
        return None

def billing_profile_created_receiver(sender,instance,*args,**kwargs):
    if not instance.customer_id and instance.email:
        print("ACTUAL AIL REQUEST SEND")
        customer=stripe.Customer.create(
            email=instance.email
        )
        print (customer)
        instance.customer_id=customer.id

pre_save.connect(billing_profile_created_receiver,sender=BillingProfile)

class CardManager(models.Manager):
    def all(self, *args, **kwargs): # ModelKlass.objects.all() --> ModelKlass.objects.filter(active=True)
       return self.get_queryset().filter(active=True)

    def add_new(self, billing_profile, token):
        if token:
            customer = stripe.Customer.retrieve(billing_profile.customer_id)
            stripe_card_response = customer.sources.create(source=token)
            new_card = self.model(
                    billing_profile=billing_profile,
                    stripe_id = stripe_card_response.id,
                    brand = stripe_card_response.brand,
                    country = stripe_card_response.country,
                    exp_month = stripe_card_response.exp_month,
                    exp_year = stripe_card_response.exp_year,
                    last4 = stripe_card_response.last4
                )
            new_card.save()
            return new_card
        return None

def user_created_receiver(sender,instance,created,*args,**kwargs):
    if created and instance.email:
        BillingProfile.objects.get_or_create(user=instance,email=instance.email)
post_save.connect(user_created_receiver,sender=User)

class ChargeManager(models.Manager):
    def do(self, billing_profile, order_obj, card=None): # Charge.objects.do()
        card_obj = card
        if card_obj is None:
            cards = billing_profile.card_set.filter(default=True) # card_obj.billing_profile
            if cards.exists():
                card_obj = cards.first()
        if card_obj is None:
            return False, "No cards available"
        c = stripe.Charge.create(
              amount = int(order_obj.total * 100), # 39.19 --> 3919
              currency = "usd",
              customer =  billing_profile.customer_id,
              source = card_obj.stripe_id,
              metadata={"order_id":order_obj.order_id},
            )
        new_charge_obj = self.model(
                billing_profile = billing_profile,
                stripe_id = c.id,
                paid = c.paid,
                refunded = c.refunded,
                outcome = c.outcome,
                outcome_type = c.outcome['type'],
                seller_message = c.outcome.get('seller_message'),
                risk_level = c.outcome.get('risk_level'),
        )
        new_charge_obj.save()
        return new_charge_obj.paid, new_charge_obj.seller_message


class Charge(models.Model):
    billing_profile         = models.ForeignKey(BillingProfile,on_delete=models.CASCADE)
    stripe_id               = models.CharField(max_length=120)
    paid                    = models.BooleanField(default=False)
    refunded                = models.BooleanField(default=False)
    outcome                 = models.TextField(null=True, blank=True)
    outcome_type            = models.CharField(max_length=120, null=True, blank=True)
    seller_message          = models.CharField(max_length=120, null=True, blank=True)
    risk_level              = models.CharField(max_length=120, null=True, blank=True)

    objects = ChargeManager()

class Card(models.Model):
    billing_profile=models.ForeignKey(BillingProfile,on_delete=models.CASCADE)
    stripe_id=models.CharField(max_length=120)
    brand=models.CharField(max_length=120,null=True,blank=True)
    country = models.CharField(max_length=12, null=True, blank=True)
    exp_month=models.IntegerField(null=True,blank=True)
    exp_year=models.IntegerField(null=True,blank=True)
    last4=models.CharField(max_length=4,null=True,blank=True)
    default=models.BooleanField(default=True)

    objects = CardManager()

    def __str__(self):
        return "{} {}".format(self.brand, self.last4)


checkout.html

{% extends "base.html" %}
{% block content %}

{% if not billing_profile%}
<div class="row text-center">
<div class="col-12 col-md-6">
    <p class="lead">Login</p>
    {% include 'accounts/snippets/form.html' with form=login_form next_url=request.build_absolute_uri %}
</div>
<div class="col-12 col-md-6">
    Continue as Guest
    {% url "guest_register" as guest_register_url %}
    {% include 'accounts/snippets/form.html' with form=guest_form next_url=request.build_absolute_uri action_url=guest_register_url %}
    </div>
</div>

{% else %}

    {% if not object.shipping_address %}

        <div class="row">
            <div class="col-12">
                <p class="lead">Shipping Address</p>
                <hr/>
            </div>
            <div class="col-6">

                {% url "checkout_address_create" as checkout_address_create %}
                {% include 'addresses/form.html' with form=address_form next_url=request.build_absolute_uri action_url=checkout_address_create address_type='shipping' %}'


            </div>
            <div class="col-6">
                {% url 'checkout_address_reuse' as checkout_address_reuse %}
             {% include 'addresses/prev_addresses.html' with address_qs=address_qs next_url=request.build_absolute_uri address_type='shipping' action_url=checkout_address_reuse %}
            </div>
            </div>
    {% elif not object.billing_address %}

    <div class="row">
        <div class="col-12">
            <p class="lead">Billing Address</p>
            <hr/>
            </div>
    <div class="col-md-6">
        {% url "checkout_address_create" as checkout_address_create %}
        {% include 'addresses/form.html' with form=address_form next_url=request.build_absolute_uri action_url=checkout_address_create address_type='billing' %}
        </div>
            <div class="col-6">
           {% url 'checkout_address_reuse' as checkout_address_reuse %}
            {% include 'addresses/prev_addresses.html' with address_qs=address_qs next_url=request.build_absolute_uri address_type='billing' action_url=checkout_address_reuse %}
            </div>
            </div>

    {% else%}
            {% if not has_card %}
                <!-- enter credit card here -->
                <div class='stripe-payment-form' data-token='{{ publish_key }}' data-next-url='{{ request.build_absolute_uri }}' data-btn-title='Add Payment Method'></div>

            {% else %}
                <h1>Finalize Checkout</h1>
                <p>Cart Item:{% for product in object.cart.products.all %}{{ product}}{% if not forloop.last %},{% endif %},{% endfor %}</p>
                <p>Shipping Address:{{object.shipping_address.get_address}}</p>
                <p>Billing Address:{{object.shipping_address.get_address}}</p>
                <p>Cart Total:{{object.cart.total}}</p>
                <p>Shipping Total:{{object.shipping_total}}</p>
                <p>Order Total:{{object.total}}</p>
                <form class="form" method="POST" action="">{% csrf_token %}
                 <button type="submit btn btn-success">Checkout</button>
                </form>
            {% endif %}
    {% endif %}

{% endif %}

{% endblock %}

Answer 1

将此添加到您的模型类：

private boolean isSelected = false;

在模型类中创建相同的getter setter

    public boolean isSelected() {
        return isSelected;
    }

    public void setSelected(boolean selected) {
        isSelected = selected;
    }

从您的适配器中选择要选择项目的位置：

    holder.title.setTag(position);
    holder.title.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                                int pos = (int) view.getTag();
                                setSelectedPosition(pos);
                            }
                        }

选择方法

    public void setSelectedPosition(int position) {
        for (int i = 0; i < list.size(); i++) {
            list.get(i).setSelected(i == position);
        }
        notifyDataSetChanged();
    }

如果您想清除选择

    public void clearSelection() {
        for (int i = 0; i < list.size(); i++) {
            list.get(i).setSelected(false);
        }
        notifyDataSetChanged();
    }

您也可以使用适配器对象从父片段/ Activity调用此方法。就像你用接口编码一样。如下所示

    @Override
    public void posClickedLong(short p) {
        adapter.setSelectedPosition(p);
    }

    @Override
    public void posClickedShort(short p) {
        adapter.setSelectedPosition(p);
    }

    @Override
    public void onBackPressed() {

    backPressed=true;
    if(longClickOk && itemsTempArray.size()>0){
       adapter.clearSelection();
    } else{
        super.onBackPressed();
    }
}

如果您想提供指定所选/取消选择状态的特定背景，请将下面的selector drawable命名为 my_selector

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/drawable_shape_rectangle_border_orange" android:state_selected="true" />  // drawable to show when selected
    <item android:drawable="@drawable/drawable_shape_rectangle_border_white" /> // drawable for default state
</selector>

drawable_shape_rectangle_border_white的代码

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke
        android:width="@dimen/_1sdp"
        android:color="@color/white" />

    <corners android:radius="@dimen/_4sdp" />
</shape>

为您的布局设置背景

android:background="@drawable/my_selector"

BindViewHolder中的

holder.title.setSelected(model.isSelected()); // here I have tried changing background for your title view only. you can set these on your relative layout or any other needed layout.

Answer 2

将boolean标志放入你的pojo类中，就像定义上面的channel_show_model类定义下面的代码一样..

    private boolean selectedFlag;


public boolean isSelectedFlag() {
    return selectedFlag;
}

public void setSelectedFlag(boolean selectedFlag) {
    this.selectedFlag = selectedFlag;
}

然后制作两个用于处理longclick的界面并单击如下代码..

 onItemClickListner onItemClickListner;
onItemLongClickListner onItemLongClickListner;

public void setOnItemLongClickListner(RecyclerViewAdpater.onItemLongClickListner onItemLongClickListner) {
    this.onItemLongClickListner = onItemLongClickListner;
}

public void setOnItemClickListner(RecyclerViewAdpater.onItemClickListner onItemClickListner) {
    this.onItemClickListner = onItemClickListner;
}

public interface onItemClickListner {
    void onClick(Channel_Show_Model str);//pass your object types.
}
public interface onItemLongClickListner{
    void onLongClick(Channel_Show_Model str);
}
    @Override
public void onBindViewHolder(ItemViewHolder holder, int position) {
    Channel_Show_Model data = mStringList.get(position); // if you pass object of class then create that class object.
    if(data.isSelectedFlag)
        holder.textView.setBackgroundColor(Color.RED);
    // below code handle click event on recycler view item.
    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            onItemClickListner.onClick(data);
        }
    });
    holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            onItemLongClickListner.onLongClick(data);
            return false;
        }
    });
}

然后在活动之后将适配器绑定到使用下面代码的回收器视图中。

recyclerViewAdpater.setOnItemClickListner(new RecyclerViewAdpater.onItemClickListner() {
        @Override
        public void onClick(Channel_Show_Model str) {
            str.setSelectedFlag(true);
            recyclerViewAdpater.notifyDataSetChanged();
        }
    });
    recyclerViewAdpater.setOnItemLongClickListner(new RecyclerViewAdpater.onItemLongClickListner() {
        @Override
        public void onLongClick(Channel_Show_Model str) {
            str.setSelectedFlag(true);
            recyclerViewAdpater.notifyDataSetChanged();
        }
    });

你可以管理长按，单击两个布尔值。

从recyclerView清除选择

2 个答案: