Android kotline disable button when checkbox not checked

Android kotlin disable button when checkbox not checked

In this article today  Android kotlin disable button when checkbox not checked. Checkbox using a checkbox is checked method  using if-else condition follows the code.

    checkBox.setOnClickListener(object:View.OnClickListener() {

      fun onClick(v:View) {

        if (checkBox.isChecked())

        {

          btnDisplay.setEnable(True)

          Toast.makeText(getApplicationContext(), "Button is Visible", Toast.LENGTH_SHORT).show()

        }

        else

        {

          btnDisplay.setEnable(false)

          Toast.makeText(getApplicationContext(), "Button is invisible", Toast.LENGTH_SHORT).show()

        }

      }

    })

1.MainActivity.kt :

import android.app.Activity

import android.os.Bundle

import android.view.View

import android.view.View.OnClickListener

import android.widget.Button

import android.widget.CheckBox

import android.widget.Toast

class MyAndroidAppActivity:Activity() {

  private val chkWindows:CheckBox

  private val btnDisplay:Button

  fun onCreate(savedInstanceState:Bundle) {

    super.onCreate(savedInstanceState)

    setContentView(R.layout.main)

    btnDisplay = findViewById(R.id.btnDisplay) as Button

    chkWindows = findViewById(R.id.chkWindows) as CheckBox

    checkBox.setOnClickListener(object:View.OnClickListener() {

      fun onClick(v:View) {

        if (checkBox.isChecked())

        {

          btnDisplay.setEnable(True)

          Toast.makeText(getApplicationContext(), "Button is Visible", Toast.LENGTH_SHORT).show()

        }

        else

        {

          btnDisplay.setEnable(false)

          Toast.makeText(getApplicationContext(), "Button is invisible", Toast.LENGTH_SHORT).show()

        }

      }

    })

  }

}

2. activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

   

    <CheckBox

        android:id="@+id/chkWindows"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Hello" />

    <Button

        android:id="@+id/btnDisplay"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/btn_display" />

</LinearLayout>

download the source code click image: