app中蓝牙开启与关闭

权限添加：

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

建立一个类来管理

public class BluetoothManager {
    /**
     * 当前 Android 设备是否支持 Bluetooth
     * @return true：支持 Bluetooth false：不支持 Bluetooth
     */

    public static boolean isBluetoothSupported()
    {
        return BluetoothAdapter.getDefaultAdapter() != null ? true : false;
    }

        /**
         * 当前 Android 设备的 bluetooth 是否已经开启
         * @return true：Bluetooth 已经开启 false：Bluetooth 未开启
         */
    public static boolean isBluetoothEnabled()
    {
        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (bluetoothAdapter != null)
        {
            return bluetoothAdapter.isEnabled();
        }
        return false;
    }

        /**
         * 强制开启当前 Android 设备的 Bluetooth
         * @return true：强制打开 Bluetooth　成功　false：强制打开 Bluetooth 失败
         */
    public static boolean turnOnBluetooth()
    {
        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (bluetoothAdapter != null)
        {
            return bluetoothAdapter.enable();
        }
        Log.d("long","蓝牙开启失败");
        return false;
    }

    public static boolean turnOffBluetooth(){
        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (bluetoothAdapter != null) {
            return bluetoothAdapter.disable();
        }
        Log.d("long","蓝牙关闭失败");
        return false;
    }


}empty