Bluetooth Sample Code For Bluetooth Turn On Or Off In Android - How To Enable Bluetooth

Bluetooth in android is basic level to learn android. In any application you can use Bluetooth for sharing purpose like file sharing, Apps sharing, Audio and video file also. In some of application you have to turn on Bluetooth in between application access process.

At that time you can turn on Bluetooth in a minute by this example.

Useful: How to create and install apk file from your project?

Download Bluetooth Code for android from here:

Create new sample Bluetooth project

1. Create a new project under the File > New > Android Project


2. Open string.xml file under the resource (res) > values folder and past the below code.

    BluetoothSample
    Settings
    Hello world!
    My Message
    GetMessage
    
    Enter Message
    
    TURN_ON
DISCOVERABLE
TURN_OFF
    

3. Open Mail xml file activity_main.xml file under the resource (res) > layout folder and past the below code.

4. Open Manifest file under your project. Past the Bluetooth permission line to allow Bluetooth in your device.

5. Now open MainActivity.java file and past below code.

package com.example.bluetoothsample;

import android.os.Bundle;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

 private static final int Request_Enabled = 0;
 private static final int Request_Discoverable = 0;
 
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
 
  
  
  final BluetoothAdapter BTA = BluetoothAdapter.getDefaultAdapter();
//  it through getSystemService(String) with BLUETOOTH_SERVICE
  if(BTA == null)
  {
   final TextView tv1 = (TextView)findViewById(R.id.textView1);
   tv1.append("device not supported");
   
  }
  final Button Btn1 = (Button)findViewById(R.id.button1);
  
  Btn1.setOnClickListener(new View.OnClickListener() {
   
   @Override
   public void onClick(View arg0) {
    
    if(!BTA.isEnabled())
    {
     Intent EnableBintent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
     startActivityForResult(EnableBintent, Request_Enabled);
    }
   }
   
  });
  
  final Button Btn2 = (Button)findViewById(R.id.button2);
  
  Btn2.setOnClickListener(new OnClickListener() {
   
   @Override
   public void onClick(View arg0) {
   
    if(!BTA.isDiscovering())
    {
     Toast.makeText(getApplicationContext(), "Making Your Device Discoverable", Toast.LENGTH_LONG).show();
     
     Intent EnableBintent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
     startActivityForResult(EnableBintent, Request_Discoverable);
    }
   }
  });
 
  final Button btn3 = (Button)findViewById(R.id.button3);
  
  btn3.setOnClickListener(new OnClickListener() {
   
   @Override
   public void onClick(View arg0) {
    
    BTA.disable();
    
    Toast.makeText(getApplicationContext(), "Bluetooth is closed", Toast.LENGTH_LONG).show();;
    
   }
  });
  
  
  
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }
 
 

}

Note: during this running Bluetooth project in emulator doesn’t work because Bluetooth adepter cant find Bluetooth device. So it’s return null. But you can check in your device directly it must work after install apk file in your mobile.

For more about: Bluetooth adapter return null.

If you have any problem and query then comment in below comment box.