mock_function.java

private void setMock(String provider, double latitude, double longitude) {
    mLocationManager.addTestProvider (provider, false, false, false, false, false, true, true, 0, 5);

    Location newLocation = new Location(provider);

    newLocation.setLatitude(latitude);
    newLocation.setLongitude(longitude);
    newLocation.setAltitude(3F);
    newLocation.setTime(System.currentTimeMillis());
    newLocation.setSpeed(0.01F);
    newLocation.setBearing(1F);
    newLocation.setAccuracy(3F);
    newLocation.setElapsedRealtimeNanos(SystemClock.elapsedRealtimeNanos());
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
    {
        newLocation.setBearingAccuracyDegrees(0.1F);
        newLocation.setVerticalAccuracyMeters(0.1F);
        newLocation.setSpeedAccuracyMetersPerSecond(0.01F);
    }
    mLocationManager.setTestProviderEnabled(provider, true);

    mLocationManager.setTestProviderLocation(provider, newLocation);
}