Question

I want to just discover peripheral devices when i start my Bluetooth Device discovery, my app must not discover/show other devices. is this any how possible?

this is how i am searching for devices

  IntentFilter filter = new IntentFilter("android.bluetooth.devicepicker.action.DEVICE_SELECTED");
  registerReceiver(mBtPickReceiver,filter);

  startActivity(new Intent("android.bluetooth.devicepicker.action.LAUNCH")
 .putExtra("android.bluetooth.devicepicker.action.EXTRA_NEED_AUTH",false));

Answer 1

To reduce (filter) the number of searched devices as per your requirements, check the Class Type of your desired bluetooth device. Once you know the type , you may filter the searched bluetooth devices based on their class type. For example:

BluetoothDevice btd = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

if(btd.getBluetoothClass().getDeviceClass() == BluetoothClass.Device.bla_bla_bla)
{
   //do whatever you want with the filtered device
}