In this tutorial we will learn how to open new Activity when a Button is clicked using Android Studio in Kotlin language. When button in an activity(Main Activity) is clicked the new activity(New Activity) will be opened.
Step 1: Create a new Project or open new project
Step 2: Create a new Activity(e.g. Empty Activity)
Step 3: Code
activity_main.xml
<?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"
android:gravity="center"
tools:context=".MainActivity">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Open New Activity" />
</LinearLayout>
MainActivity.kt
package com.jigopost.myapplication
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.content.Intent
import android.view.View
import android.widget.Button
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
//initialize
val mButton = findViewById<View>(R.id.button) as Button
//handle onClick
mButton.setOnClickListener {
//intent to start NewActivity
startActivity(Intent(this@MainActivity, NewActivity::class.java))
}
}
}
activity_new.xml
<?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"
android:gravity="center"
tools:context=".NewActivity">
<TextView
android:text="New Activity"
android:textSize="30sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
NewActivity.kt
package com.jigopost.myapplication
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
class NewActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_new)
}
}
Step 4: Run Project
Output
