Continuing from
https://varanasisoftwarejunction.blogspot.com/2021/01/customizing-layout-in-android-studio.html
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".SecondFragment">
<TextView
android:id="@+id/textview_second"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@id/button_second"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button_second"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/previous"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/textview_second" />
<EditText
android:id="@+id/ed1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="508dp"
android:ems="10"
android:inputType="numberSigned"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="@+id/ed2"
android:layout_width="155dp"
android:layout_height="47dp"
android:ems="10"
android:inputType="numberSigned"
app:layout_constraintBottom_toTopOf="@+id/bttnAdd"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.382"
app:layout_constraintStart_toEndOf="@+id/ed1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.539" />
<TextView
android:id="@+id/tvResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Result"
app:layout_constraintBottom_toTopOf="@+id/ed1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.521"
tools:layout_editor_absoluteX="153dp" />
<Button
android:id="@+id/bttnAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="116dp"
android:text="Add"
app:layout_constraintBottom_toTopOf="@+id/button_second"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/ed1" />
</androidx.constraintlayout.widget.ConstraintLayout>
package com.varanasisoftwarejunction.mykotlinproject
import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import android.widget.EditText
import android.widget.TextView
import androidx.navigation.fragment.findNavController
/**
* A simple [Fragment] subclass as the second destination in the navigation.
*/
class SecondFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_second, container, false)
}
public fun doAdd(view:View)
{
val tv: TextView = view.findViewById<TextView>(R.id.tvResult)
try {
val ed1:EditText = view.findViewById<EditText>(R.id.ed1)
val ed2:EditText = view.findViewById<EditText>(R.id.ed2)
var x:Int =ed1.text.toString().toInt()
var y:Int =ed2.text.toString().toInt()
var sum:Int=x+y
tv.text = sum.toString()
}
catch(ex:Exception)
{
tv.text="" + ex.message
}
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
view.findViewById<Button>(R.id.bttnAdd).setOnClickListener {
doAdd(view)
}
view.findViewById<Button>(R.id.button_second).setOnClickListener {
findNavController().navigate(R.id.action_SecondFragment_to_FirstFragment)
}
}
}
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