Java Android Bluetooth Connection Turn ON or OFF with code and Examples

Android Bluetooth Tutorial

MSBTE DIPLOMA SEMESTER 6- Android Development 

Hello !! So today I have come up with a new topic of Android Studio code/program of java android bluetooth example app where we will code for java android bluetooth connection with on/off button facility. We will build an android application to turn on and off the bluetooth  programatically for our android device using own customized android application in java.

Here is a step by step tutorial for Android Bluetooth permission using on/off toggle switch in Java.

I have attached a XML, Java and Manifest file as well. There are many other Android Studio, C++, etc related programs on our blog do read them as well !! (links below)

XML code for Bluetooth on/off:

<?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:orientation="vertical"

    android:gravity="center"

    tools:context=".MainActivity">

    <ToggleButton

        android:id="@+id/toggleButton"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:checked="false"

        />

    <TextView

        android:id="@+id/textView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="16dp"

        />

</LinearLayout>

JAVA code for Bluetooth on/off:

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.bluetooth.BluetoothAdapter;

import android.os.Bundle;

import android.widget.CompoundButton;

import android.widget.TextView;

import android.widget.ToggleButton;

public class MainActivity extends AppCompatActivity {

    ToggleButton toggleButton;

    TextView textView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

// Getting toggle button and textView from activity_main

        toggleButton = (ToggleButton) findViewById(R.id.toggleButton);

        textView = (TextView) findViewById(R.id.textView);

        // Put listener on toggle button

        toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override

            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {

                if (checked) {

                    textView.setText("Bluetooth is ON");

                    BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

                    adapter.enable();

                } else {

                    textView.setText("Bluetooth is OFF");

                    BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

                    adapter.disable();

                }

            }

        });

        // For initial setting

        if (toggleButton.isChecked()) {

            textView.setText("Bluetooth is ON");

            BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

            adapter.enable();

        } else {

            textView.setText("Bluetooth is OFF");

            BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

            adapter.disable();

        }

    }

}

Manifest file of Bluetooth on/off:

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

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

    package="com.example.myapplication">

    <uses-permission android:name="android.permission.BLUETOOTH"/>

    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

Programs:-

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