在这些情况下，将 RecyclerView 与 Adapter 结合使用是您的最佳选择。我的工作代码如下
类 列表适配器
package com.akshita.recycler;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.EditText;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
public class listAdapter extends RecyclerView.Adapter<listAdapter.ViewHolder> {
private ArrayList<String> product_name;
private ArrayList<Integer> quantity;
private ArrayList<Double> price;
private ArrayList<String> specs;
private static Context scontext;
public listAdapter(Context context)
{
scontext = context;
this.product_name = new ArrayList<String>();
this.price = new ArrayList<Double>();
this.quantity = new ArrayList<Integer>();
this.specs = new ArrayList<String>();
}
public listAdapter(Context context, ArrayList<String> pdname, ArrayList<Integer> quantity, ArrayList<Double> price, ArrayList<String> specs)
{
this.product_name = pdname;
this.price = price;
this.quantity = quantity;
this.specs = specs;
scontext = context;
}
@NonNull
@Override
public listAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View listItem = layoutInflater.inflate(R.layout.productview,parent,false);
ViewHolder viewHolder = new ViewHolder(listItem);
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull listAdapter.ViewHolder holder, int position) {
holder.actv.setText(product_name.get(position));
holder.qty.setText(quantity.get(position).toString());
holder.price.setText(price.get(position).toString());
holder.desc.setText(specs.get(position));
}
public void addView(String pdname, Double prc, Integer quant, String spec ) {
product_name.add(pdname);
quantity.add(quant);
price.add(prc);
specs.add(spec);
notifyItemInserted(product_name.size());
notifyItemInserted(quantity.size());
notifyItemInserted(price.size());
notifyItemInserted(specs.size());
}
public void removeAt(int position) {
product_name.remove(position);
quantity.remove(position);
price.remove(position);
specs.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, product_name.size());
notifyItemRangeChanged(position, quantity.size());
notifyItemRangeChanged(position, price.size());
notifyItemRangeChanged(position, specs.size());
}
@Override
public int getItemCount() {
return product_name.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public AutoCompleteTextView actv;
public EditText qty;
public EditText price;
public EditText desc;
public Button button;
public ViewHolder(View itemView) {
super(itemView);
this.actv = itemView.findViewById(R.id.tv_product);
this.qty = itemView.findViewById(R.id.prod_qty);
this.price = itemView.findViewById(R.id.prod_price);
this.desc = itemView.findViewById(R.id.prod_specs);
this.button = itemView.findViewById(R.id.btn_rmv);
button.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if(v.equals(button)){
removeAt(getAdapterPosition());
}
}
}
}
我的主课
MainActivity.java
package com.akshita.recycler;
import android.os.Bundle;
import android.view.View;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
listAdapter adapter;
RecyclerView hs;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
hs = findViewById(R.id.rcview);
hs.setHasFixedSize(false);
hs.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
}
@Override
public void onClick(View v) {
switch(v.getId())
{
case R.id.add: addView(v);
}
}
public void addView(View v)
{
if(adapter == null) {
adapter = new listAdapter(this);
hs.setAdapter(adapter);
}
adapter.addView("Name",0.0, 0, "Specs");
}
}
产品视图.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:id="@+id/ll_out"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5sp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10sp"
android:orientation="horizontal">
<AutoCompleteTextView
android:id="@+id/tv_product"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:gravity="left"
android:hint="Enter Product"
android:inputType="text" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10sp"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="vertical">
<EditText
android:id="@+id/prod_qty"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="true"
android:focusableInTouchMode="true"
android:hint="Enter Quantity"
android:gravity="left"
android:inputType="number" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="vertical">
<EditText
android:id="@+id/prod_price"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:hint="Prod Price"
android:gravity="left"
android:inputType="none" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".5"
android:orientation="vertical">
<EditText
android:id="@+id/prod_specs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:editable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:gravity="left"
android:hint="Prod Specs"
android:inputType="none" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:layout_marginTop="1dp"
android:padding="0dp">
<Button
android:id="@+id/btn_rmv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Remove Product"
android:textColor="@color/white" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
活动主文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:gravity="center|top"
android:orientation="vertical">
<Button
android:id="@+id/add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="addView"
/>
<androidx.recyclerview.widget.RecyclerView
android:layout_marginTop="10dp"
android:id="@+id/rcview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
完整的工作代码可用在 GitHub 上 https://github.com/VanshajDaga/Recycler
