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" />

How To Enable the Bluetooth For Your Android App

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this document provides the detailed information about how to activate bluetooth functions on your android device for your application.

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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:

While, the second and third functions need the following permissions: