Delete data from Google Fit account

gistfile1.java

    //Requires OAuth2 permissions to read/write fitness data.
    private void deleteAllCalories() {
        //Set the delete timespan to be the last year
        Calendar cal = Calendar.getInstance();
        Date now = new Date();
        cal.setTime(now);
        long endTime = cal.getTimeInMillis();
        cal.add(Calendar.YEAR, -1);
        long startTime = cal.getTimeInMillis();

        //  Create a delete request object, providing a data type and a time interval
        DataDeleteRequest request = new DataDeleteRequest.Builder()
                .setTimeInterval(startTime, endTime, TimeUnit.MILLISECONDS)
                .addDataType(DataType.TYPE_CALORIES_EXPENDED)
                .build();

        // Invoke the History API with the Google API client object and delete request, and then
        // specify a callback that will check the result.
        Fitness.HistoryApi.deleteData(mGoogleApiFitnessClient, request)
                .await(1, TimeUnit.MINUTES);


    }