android - Toggling Bluetooth on and off?

Question

Is there a simple tutorial or dose anyone have code to toggle Bluetooth on and off using a Toggle-button in eclipse building for android?

If anyone can help that will be greatly appreciated.

-Thanks in advance.

Answer 1

You'll need

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

in your manifest file, and variables like:

private final integer REQUEST_ENABLE_BT = 1;

and

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
boolean hasBluetooth = (mBluetoothAdapter == null);

so that in your OnCreate you can do something like:

final ToggleButton togglebutton = (ToggleButton) findViewById(R.id.togglebutton);
togglebutton.setOnClickListener(new OnClickListener()
{
  public void onClick(View v)
  {
    // Perform action on clicks
    if (togglebutton.isChecked())
    {
      if (hasBluetooth && !mBluetoothAdapter.isEnabled())
      {
        // prompt the user to turn BlueTooth on
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
      }
    }
    else
    {
      if (hasBluetooth && mBluetoothAdapter.isEnabled())
      {
        // you should really prompt the user for permission to turn
        // the BlueTooth off as well, e.g., with a Dialog
        boolean isDisabling = mBluetoothAdapter.disable();
        if (!isDisabling)
        {
           // an immediate error occurred - perhaps the bluetooth is already off?
        }
      }
    }
  }
});

where the user response to the "turn bluetooth on" prompt is caught in

protected void onActivityResult (int requestCode, int resultCode, Intent data)
{
  if ((requestCode == REQUEST_ENABLE_BT) && (resultCode == RESULT_OK))
  {
    boolean isEnabling = mBluetoothAdapter.enable();
    if (!isEnabling)
    {
      // an immediate error occurred - perhaps the bluetooth is already on?
    }
    else if (mBluetoothAdapter.getState() == BluetoothAdapter.STATE_TURNING_ON)
    {
      // the system, in the background, is trying to turn the Bluetooth on
      // while your activity carries on going without waiting for it to finish;
      // of course, you could listen for it to finish yourself - eg, using a
      // ProgressDialog that checked mBluetoothAdapter.getState() every x
      // milliseconds and reported when it became STATE_ON (or STATE_OFF, if the
      // system failed to start the Bluetooth.)
    }
  }
}