Connect Mi Band 2 to Endomondo on Android and have Your heart rate measurements during running and other workouts in Endomondo.
The tutorial is available here:
The tutorial how to connect Mi Band 1s Pulse with Endomondo fitness tracker on Android is available here:
It may be not that easy because of the way the Bluetooth is managed by the Android system.
Mi Heart Rate be fit app is available in the Google Play Store for free.Let me know about any questions You have in the comments below.