Recognizing a bluetooth connection

Question

I'd like to start an application when a specific device BT is connected.

I do not want to use IFTTT, I'd like to write my own application able to autonomously implements what IFTTT does for any app: start when the event on bluetooth connection on device xxx is done.

how can I do that?

Answer 1

First, you need to detect that smartphone is connected to a BLE device. You can do that in BluetoothGattCallback's onConnectionStateChange() by checking wether newState is equal to BluetoothGatt.STATE_CONNECTED.

Then, start your target application's activity:

@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {

    if (newState == BluetoothGatt.STATE_CONNECTED && status == BluetoothGatt.GATT_SUCCESS) {
        // start your target application's activity here
        Intent intent = new Intent(com.yourapp.ACTION);
        startActivity(intent);
    }
}