This is my preview of my app. My app receives values from google sheet. You can see the buttons plus and minus. Listview includes two values which are from the sheet & and three values are increment buttons & quantity edittext.
So my question is how to add on click event on buttons to increment and change the value of quantity edittext
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<ListView
android:id="@+id/productTakingList"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" >
</ListView>
</androidx.constraintlayout.widget.ConstraintLayout>
list_item_row.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="#fff"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/constraintLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toTopOf="@+id/tv_brand"
app:layout_constraintTop_toTopOf="@+id/tv_brand"
tools:layout_editor_absoluteX="5dp">
<TextView
android:id="@+id/takingProduct"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="33dp"
android:text="Product"
android:textColor="@color/black"
android:textSize="18dp"
app:layout_constraintBottom_toTopOf="@+id/tv_brand"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/takingRate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="14dp"
android:layout_marginStart="33dp"
android:text="Rate"
android:textSize="15dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/product"
app:layout_constraintVertical_bias="0.38" />
<ImageView
android:id="@+id/takingPlus"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginBottom="14dp"
android:layout_marginEnd="10dp"
android:layout_marginTop="14dp"
android:background="#0B0A0A"
android:textAlignment="center"
android:textSize="25sp"
app:backgroundTint="@color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/takingQty"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/ic_baseline_add_box_24"
tools:ignore="VectorDrawableCompat" />
<EditText
android:id="@+id/takingQty"
android:layout_width="40dp"
android:layout_height="45dp"
android:layout_marginBottom="14dp"
android:layout_marginEnd="10dp"
android:layout_marginTop="14dp"
android:text="0"
android:textAlignment="center"
android:textColor="#070707"
android:textSize="25sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/takingMinus"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/takingMinus"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginBottom="14dp"
android:layout_marginEnd="33dp"
android:layout_marginTop="14dp"
android:background="#0B0A0A"
android:onClick="minus"
android:textAlignment="center"
android:textSize="25sp"
app:backgroundTint="@color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/ic_baseline_indeterminate_check_box_24"
tools:ignore="VectorDrawableCompat" />
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
ListItem.java
public class ListItem extends AppCompatActivity
{
ListView listView;
ListAdapter adapter;
ProgressDialog loading;
EditText qty;
ImageView plusImg,minusImg;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_item);
listView = (ListView) findViewById(R.id.productTakingList);
qty=findViewById(R.id.takingQty);
plusImg=findViewById(R.id.takingPlus);
minusImg=findViewById(R.id.takingMinus);
button = findViewById(R.id.button);
getItems();
}
private void getItems() {
loading = ProgressDialog.show(this,"Loading","please wait",false,true);
StringRequest stringRequest = new StringRequest(Request.Method.GET, "My Web App URL is here",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
parseItems(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}
);
int socketTimeOut = 50000;
RetryPolicy policy = new DefaultRetryPolicy(socketTimeOut, 0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
stringRequest.setRetryPolicy(policy);
RequestQueue queue = Volley.newRequestQueue(this);
queue.add(stringRequest);
}
private void parseItems(String jsonResposnce) {
ArrayList<HashMap<String, String>> list = new ArrayList<>();
try {
JSONObject jobj = new JSONObject(jsonResposnce);
JSONArray jarray = jobj.getJSONArray("items");
for (int i = 0; i < jarray.length(); i++) {
JSONObject jo = jarray.getJSONObject(i);
String itemName = jo.getString("itemName");
String price = jo.getString("price");
HashMap<String, String> item = new HashMap<>();
item.put("itemName", itemName);
item.put("price",price);
list.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
adapter = new SimpleAdapter(this,list,R.layout.list_item_row,
new String[]{"itemName","price",},new int[]{R.id.takingProduct,R.id.takingRate});
listView.setAdapter(adapter);
loading.dismiss();
}
}
