How to check if bluetooth is enabled programmatically?

Question

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?

Just check out this [link](http://developer.android.com/guide/topics/wireless/bluetooth.html#SettingUp) for Bluetooth and follow all the step. I hope this help. — Uttam, Oct 06 '11 at 09:31

score 199 · Accepted Answer · edited Oct 11 '19 at 09:58

199

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" />

edited Oct 11 '19 at 09:58

jobbert

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answered Oct 06 '11 at 09:24

Pete Houston

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8

If bluetooth permission is only needed for this detection, don't forget to set it NOT required: – Murphy Jan 16 '13 at 01:21
Is internet required to check bluetooth? – portfoliobuilder Aug 26 '15 at 19:30
7

nope, you don't need internet to check bluetooth status. well, aside from getting the code from this SO post ;) – dasch88 Feb 03 '16 at 14:19

score 7 · Answer 2 · edited Jul 07 '16 at 11:28

7

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);

edited Jul 07 '16 at 11:28

rekire

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answered Feb 11 '14 at 06:58

Hari Babu Mandala

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how it's different with "BluetoothAdapter.getDefaultAdapter()" ? – CoDe May 01 '14 at 05:16

score 7 · Answer 3 · answered Mar 19 '15 at 08:40

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

    }

with the permission in manifest file:

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

score 5 · Answer 4 · answered Apr 09 '14 at 13:05

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

score 2 · Answer 5 · edited Mar 14 '14 at 08:57

2

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

edited Mar 14 '14 at 08:57

giammin

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answered Mar 14 '14 at 08:34

srinivas

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score 1 · Answer 6 · answered Apr 30 '14 at 03:56

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" />

Suresh B B · Answer 7 · 2021-01-11T09:32:21.313

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();
            }
        }
    }
}

To check Bluetooth whether is turned on or off if turned off will reqest a runtime permission to enable bluetooth and if they deny the access it will close the activity. — Suresh B B, Jan 11 '21 at 09:25
If this post is an update of [this](https://stackoverflow.com/a/65664087/4826457) answer, you should use [edit] link instead of adding another post or adding in comments — Suraj Rao, Jan 11 '21 at 09:26

How to check if bluetooth is enabled programmatically?

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