Example on ToggleButton?

Before getting into example, we should know what is togglebutton in android, Toggle button is extended view of Button view. It going to represent of state of button as checked and unchecked. Here is the simple solution about toggle button in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
   xmlns:android="https://schemas.android.com/apk/res/android"
   xmlns:app="https://schemas.android.com/apk/res-auto"
   xmlns:tools="https://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <ToggleButton
      android:id="@+id/result"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Result Data"
      android:textColor="#FFF"
      android:background="@color/colorPrimary"
      android:textOff="Off"
      android:textOn="On"
      android:textSize="20sp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintRight_toRightOf="parent"
      app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

In the above code we have added toggle button, when user click on toggle button it going to change the state.

Step 3 − Add the following code to src/MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ToggleButton;

public class MainActivity extends AppCompatActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      final ToggleButton toggleButton = findViewById(R.id.result);
      toggleButton.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            if (toggleButton.isChecked()) {
               toggleButton.setTextOn("You have Checked");
               toggleButton.setChecked(true);
            } else if (!toggleButton.isChecked()) {
               toggleButton.setTextOff("You have not Checked");
               toggleButton.setChecked(false);
            }
         }
      });
   }
}

In the above code, when user click on toggle button, it going to check the state as toggleButton.isChecked(). if it is checked state then it going to change the toggle button text using setTexton() and change the state as setChecked(true). In else case. if it is not checked then it going to change the toggle button text using setTextOff() and change the state as setChecked(false).

Step 4 − No need to change manifest.xml

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

In the above output represent about idle state. When user click on the button it going show the result as follows-

In the above result, it going to change the text as YOU HAVE CHECKED and internally it going to change the state as setChecked(true). When you click on the above button, it going to show the output as shown below -

In the above result, it going change the text as "YOU HAVE NOT CHECKED" and internally it going to change the state as setChecked(false).