CODEWITHSUNDEEP
androidbluetooth
Zerhinne
Zerhinne

Reputation: 2057

How to check if bluetooth is enabled programmatically?

I would like to check if bluetooth is enabled on any Android device periodically. Is there any intents that I could catch using BroadcastReceiver to do so, or is there other ways to do it?

Upvotes: 88

Views: 88117

Answers (8)

M.Ed
M.Ed

Reputation: 1348

Since BluetoothAdapter.getDefaultAdapter() is deprecated, you can instead retrieve the bluetooth adapter from BluetoothManager like so:

val bluetoothManager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
val bluetoothAdapter = bluetoothManager.adapter
bluetoothAdapter?.isEnabled

Upvotes: 1

Suresh B B
Suresh B B

Reputation: 1420

First allow the Permissions from Manifest.

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

public class MainActivity extends AppCompatActivity {
    
    private BluetoothAdapter mAdapter;
    private BluetoothDevice mDevice;
    private static final int ACCESS_REQUEST_CODE=100;
    private static final int REQUEST_ENABLE_CODE=1;
    private AudioRecord mRecord;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (mAdapter!=null && mAdapter.isEnabled()){

        }
        else {
            Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableIntent, REQUEST_ENABLE_CODE);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode==REQUEST_ENABLE_CODE){
            if (resultCode==RESULT_OK){
                println("Bluettoth Enabled");
            }
            else if (resultCode==RESULT_CANCELED){
                println("Bluetooth Not permitted");
                finish();
            }
        }
    }
}

Upvotes: 1

Pete Houston
Pete Houston

Reputation: 15089

There you go:

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
    // Device does not support Bluetooth
} else if (!mBluetoothAdapter.isEnabled()) {
    // Bluetooth is not enabled :)
} else {
    // Bluetooth is enabled 
}

With uses-permission 

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

Upvotes: 204

Hari Babu Mandala
Hari Babu Mandala

Reputation: 295

Here I have other alternative as an answer for this question.

First add following lines in your Manifest file.

<uses-feature android:name="android.hardware.BLUETOOTH" android:required="false"/>

Now, where you want to check Bluetooth supportability, use following code.

boolean isBluetoothSupported = getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH);

Upvotes: 8

Arun kumar
Arun kumar

Reputation: 1894

public boolean isBluetoothEnabled()
    {
        BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        return mBluetoothAdapter.isEnabled();

    }

with the permission in manifest file:

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

Upvotes: 7

Ushal Naidoo
Ushal Naidoo

Reputation: 2744

This is how I did it with the help of @xjaphx's answer, slightly simplified version:

 private boolean getBlueToothOn(){
    BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); 
      return btAdapter != null && btAdapter.isEnabled();
    }

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

Upvotes: 1

Jayesh Tembhekar
Jayesh Tembhekar

Reputation: 526

To check Bluetooth state, ON or OFF, programmatically:

    BluetoothAdapter btAdapter = ((Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN_MR1)
           ?((BluetoothManager)mContext.getSystemService(Context.BLUETOOTH_SERVICE)).getAdapter()
               :(BluetoothAdapter.getDefaultAdapter()));

       if(btAdapter==null){
        return;
       }
       if(btAdapter.getState()==BluetoothAdapter.STATE_ON){
            //Bluetooth is ON
       }

You may also listen to Intent action:

BluetoothAdapter.ACTION_STATE_CHANGED

Upvotes: 6

srinivas
srinivas

Reputation: 31

use can use 

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

for check bt connected 

mBluetoothAdapter.getProfileConnectionState(BluetoothHeadset.HEADSET) == BluetoothHeadset.STATE_CONNECTED

for check bt disconnected 

mBluetoothAdapter.getProfileConnectionState(BluetoothHeadset.HEADSET) == BluetoothHeadset.STATE_DISCONNECTED

Upvotes: 2

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