Can now change quantity of items

Listify/app/src/main/java/com/example/listify/List.java

@@ -1,15 +1,19 @@
 package com.example.listify;
 
 import android.content.Context;
+import android.content.Intent;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.EditText;
 import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.TextView;
+import java.util.ArrayList;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -18,39 +22,48 @@ import androidx.appcompat.app.AppCompatActivity;
 public class List extends AppCompatActivity {
     ListView listView;
     String listName = "Sample List";
-    String[] pNames = {"Half-gallon organic whole milk"};
-    String[] pStores = {"Kroger"};
-    String[] pPrices = {"$5.00"};
-    int[] pImages = {R.drawable.milk};
 
-    //List(String name) {
+    Button incrQuan;
-    //    listName = name;
+    Button decrQuan;
-    //}
+
+    ArrayList<String> pNames = new ArrayList<>(); //String[] pNames = {"Half-gallon organic whole milk"};
+    ArrayList<String> pStores = new ArrayList<>(); //String[] pStores = {"Kroger"};
+    ArrayList<String> pPrices = new ArrayList<>(); //String[] pPrices = {"$5.00"};
+    ArrayList<String> pQuantity = new ArrayList<>(); //String[] pQuantity = {"1"};
+    ArrayList<Integer> pImages = new ArrayList<>(); //int[] pImages = {R.drawable.milk};
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
+        pNames.add("Half-gallon organic whole milk");
+        pStores.add("Kroger");
+        pPrices.add("$5.00");
+        pQuantity.add("1");
+        pImages.add(R.drawable.milk);
+
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_list);
 
         listView = findViewById(R.id.listView);
+        MyAdapter myAdapter = new MyAdapter(this, pNames, pStores, pPrices, pQuantity, pImages);
 
-        MyAdapter myAdapter = new MyAdapter(this, pNames, pStores, pPrices, pImages);
         listView.setAdapter(myAdapter);
     }
 
     class MyAdapter extends ArrayAdapter<String> {
         Context context;
-        String[] pNames;
+        ArrayList<String> pNames; //String[] pNames;
-        String[] pStores;
+        ArrayList<String> pStores; //String[] pStores;
-        String[] pPrices;
+        ArrayList<String> pPrices; //String[] pPrices;
-        int[] pImages;
+        ArrayList<String> pQuantity; //String[] pQuantity;
+        ArrayList<Integer> pImages; //int[] pImages;
 
-        MyAdapter (Context c, String[] names, String[] stores, String[] prices, int[] images) {
+        MyAdapter (Context c, ArrayList<String> names, ArrayList<String> stores, ArrayList<String> prices, ArrayList<String> quantity, ArrayList<Integer> images) {
             super(c, R.layout.listproduct, R.id.productView, names);
             context = c;
             pNames = names;
             pStores = stores;
             pPrices = prices;
+            pQuantity = quantity;
             pImages = images;
         }
 
@@ -60,15 +73,52 @@ public class List extends AppCompatActivity {
             LayoutInflater layoutInflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             View listproduct = layoutInflater.inflate(R.layout.listproduct, parent,false);
 
-            ImageView image = listproduct.findViewById(R.id.imageView);
+            decrQuan = (Button) listproduct.findViewById(R.id.buttonDecr);
+            decrQuan.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    TextView quantityText = (TextView) findViewById(R.id.quantityView);
+                    int q = Integer.parseInt(quantityText.getText().toString()) - 1;
+                    quantityText.setText(Integer.toString(q));
+
+                    if(q <= 1) {
+                        decrQuan.setEnabled(false);
+                    }
+                    if(q < 10) {
+                        incrQuan.setEnabled(true);
+                    }
+                }
+            });
+            decrQuan.setEnabled(false);
+
+            incrQuan = (Button) listproduct.findViewById(R.id.buttonIncr);
+            incrQuan.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    TextView quantityText = (TextView) findViewById(R.id.quantityView);
+                    int q = Integer.parseInt(quantityText.getText().toString()) + 1;
+                    quantityText.setText(Integer.toString(q));
+
+                    if(q > 1) {
+                        decrQuan.setEnabled(true);
+                    }
+                    if(q >= 10) {
+                        incrQuan.setEnabled(false);
+                    }
+                }
+            });
+
             TextView name = listproduct.findViewById(R.id.productView);
             TextView store = listproduct.findViewById(R.id.storeView);
             TextView price = listproduct.findViewById(R.id.priceView);
+            TextView quantity = listproduct.findViewById(R.id.quantityView);
+            ImageView image = listproduct.findViewById(R.id.imageView);
 
-            image.setImageResource(pImages[position]);
+            name.setText(pNames.get(position));
-            name.setText(pNames[position]);
+            store.setText(pStores.get(position));
-            store.setText(pStores[position]);
+            price.setText(pPrices.get(position));
-            price.setText(pPrices[position]);
+            quantity.setText(pQuantity.get(position));
+            image.setImageResource(pImages.get(position));
 
             return listproduct;
         }

Listify/app/src/main/res/layout/listproduct.xml

@@ -15,22 +15,22 @@
         app:layout_constraintTop_toTopOf="parent">
 
         <Button
-            android:id="@+id/buttonIncr"
+            android:id="@+id/buttonDecr"
             android:layout_width="30dp"
             android:layout_height="30dp"
             android:layout_marginStart="25dp"
-            android:text="+"
+            android:text="-"
             android:textSize="10dp"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintStart_toEndOf="@+id/imageView"
             app:layout_constraintTop_toBottomOf="@+id/storeView" />
 
         <Button
-            android:id="@+id/buttonDecr"
+            android:id="@+id/buttonIncr"
             android:layout_width="30dp"
             android:layout_height="30dp"
             android:layout_marginStart="75dp"
-            android:text="-"
+            android:text="+"
             android:textSize="10dp"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintStart_toEndOf="@+id/imageView"
@@ -93,13 +93,13 @@
             app:layout_constraintTop_toBottomOf="@+id/storeView" />
 
         <TextView
-            android:id="@+id/textViewQuantity"
+            android:id="@+id/quantityView"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="1"
+            android:text="q"
             app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toStartOf="@+id/buttonDecr"
+            app:layout_constraintEnd_toStartOf="@+id/buttonIncr"
-            app:layout_constraintStart_toEndOf="@+id/buttonIncr"
+            app:layout_constraintStart_toEndOf="@+id/buttonDecr"
             app:layout_constraintTop_toBottomOf="@+id/storeView" />
     </androidx.constraintlayout.widget.ConstraintLayout>