Java tutorial
//package com.java2s; import android.bluetooth.BluetoothAdapter; import android.content.Context; public class Main { public static void toggleBlueTooth(Context context) { BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); if (adapter != null) { switch (adapter.getState()) { case BluetoothAdapter.STATE_OFF: adapter.enable(); break; case BluetoothAdapter.STATE_ON: adapter.disable(); break; } } } }