How to enable/disable bluetooth programmatically in android

up vote 40 down vote favorite

16

HI all,

I want to enable/disable bluetooth through the program..I has the following code.

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();    if (!mBluetoothAdapter.isEnabled()) {        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);

But this sort of code is not working in SDK 1.5..How can i do the same in SDK 1.5.?

android bluetooth

share|improve this question

edited Mar 22 '11 at 7:20 androidGuy 45462043

asked Sep 27 '10 at 18:07 user458295 2543611

How is it not working? Are you getting an error? If so what is the error? –  Adam Driscoll Sep 27 '10 at 18:12

BluetoothAdapter is showing error in SDK 1.5 –  user458295 Sep 27 '10 at 18:34

add a comment

5 Answers

active oldest votes

up vote 16 down vote accepted

Android BluetoothAdapter docs say it has been available since API Level 5. API Level 5 is Android 2.0.

You can try using a backport of the Bluetooth API (have not tried it personally): http://code.google.com/p/backport-android-bluetooth/

share|improve this answer

edited Sep 27 '10 at 19:15

answered Sep 27 '10 at 19:10 James Schek 12.5k13357

add a comment

up vote 73 down vote

this code worked for me..

//Disable bluetoothBluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();    if (mBluetoothAdapter.isEnabled()) {    mBluetoothAdapter.disable(); } 

share|improve this answer

edited Jul 15 '13 at 11:52 maszter 2,13561432

answered Jun 8 '11 at 9:09 prijin 7781815

it really works for me also. simple method to disconnect the bluetooth in android devices. thanks a lot buddy. –  Android Developer Jun 14 '11 at 6:39

2

if you add BLUETOOTH_ADMIN permission it's work but if not you need to use startActivityForResult(enableBtIntent, 0); to enable your bluetooth –  Majid Golshadi Jan 11 '14 at 14:17

Thanks for your useful answer +1 . just I want to add for who doesn't know how to enable it: mBluetoothAdapter.enable() –  Chris Sim Apr 21 at 13:45

add a comment

up vote 30 down vote

Here is a bit more robust way of doing this, also handling the return values of enable()\disable() methods:

public static boolean setBluetooth(boolean enable) {    BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();    boolean isEnabled = bluetoothAdapter.isEnabled();    if (enable && !isEnabled) {        return bluetoothAdapter.enable();     }    else if(!enable && isEnabled) {        return bluetoothAdapter.disable();    }    // No need to change bluetooth state    return true;}

And add the following permissions into your manifest file:

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

But remember these important points:

This is an asynchronous call: it will return immediately, and clients should listen for ACTION_STATE_CHANGED to be notified of subsequent adapter state changes. If this call returns true, then the adapter state will immediately transition from STATE_OFF to STATE_TURNING_ON, and some time later transition to either STATE_OFF or STATE_ON. If this call returns false then there was an immediate problem that will prevent the adapter from being turned on - such as Airplane mode, or the adapter is already turned on.

share|improve this answer

edited Nov 22 '13 at 10:54

answered Nov 22 '13 at 10:47 Caner 19.6k1576109

1

if you add BLUETOOTH_ADMIN permission it's work but if not you need to use startActivityForResult(enableBtIntent, 0); to enable your bluetooth –  Majid Golshadi Jan 11 '14 at 14:16

perfect solution –  Hiren Patel Apr 19 '14 at 9:32

thnks for the addition highlighted information –  Rahul Rastogi Feb 24 at 11:55

add a comment

up vote 3 down vote

The solution of prijin worked perfectly for me. It is just fair to mention that two additional permissions are needed:

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

When these are added, enabling and disabling works flawless with the default bluetooth adapter.

share|improve this answer

edited Nov 22 '13 at 10:49 Caner 19.6k1576109

answered Oct 25 '13 at 19:04 Peter Osburg 131118

add a comment

up vote 1 down vote

To Enable the Bluetooth you could use either of the following functions: public void enableBT(View view){ BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (!mBluetoothAdapter.isEnabled()){ Intent intentBtEnabled = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); // The REQUEST_ENABLE_BT constant passed to startActivityForResult() is a locally defined integer (which must be greater than 0), that the system passes back to you in your onActivityResult() // implementation as the requestCode parameter. int REQUEST_ENABLE_BT = 1; startActivityForResult(intentBtEnabled, REQUEST_ENABLE_BT); } } The second function is: public void enableBT(View view){ BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (!mBluetoothAdapter.isEnabled()){ mBluetoothAdapter.enable(); }} The difference is that the first function makes the app ask the user a permission to turn on the Bluetooth or to deny. The second function makes the app turn on the Bluetooth directly. To Disable the Bluetooth use the following function: public void disableBT(View view){ BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (mBluetoothAdapter.isEnabled()){ mBluetoothAdapter.disable(); }} NOTE/ The first function needs only the following permission to be defined in the AndroidManifest.xml file: <uses-permission android:name="android.permission.BLUETOOTH"/> While, the second and third functions need the following permissions: <uses-permission android:name="android.permission.BLUETOOTH"/><uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/> share|improve this answer