`{"activities-steps":[{"dateTime":"2016-09-24","value":"0"},{"dateTime":"2016-09-25","value":"0"},{"dateTime":"2016-09-26","value":"0"},{"dateTime":"2016-09-27","value":"0"},{"dateTime":"2016-09-28","value":"0"},{"dateTime":"2016-09-29","value":"0"},{"dateTime":"2016-09-30","value":"0"},{"dateTime":"2016-10-01","value":"0"},{"dateTime":"2016-10-02","value":"0"},{"dateTime":"2016-10-03","value":"0"},{"dateTime":"2016-10-04","value":"0"},{"dateTime":"2016-10-05","value":"0"},{"dateTime":"2016-10-06","value":"0"},{"dateTime":"2016-10-07","value":"0"},{"dateTime":"2016-10-08","value":"0"},{"dateTime":"2016-10-09","value":"0"},{"dateTime":"2016-10-10","value":"0"},{"dateTime":"2016-10-11","value":"0"},{"dateTime":"2016-10-12","value":"0"},{"dateTime":"2016-10-13","value":"0"},{"dateTime":"2016-10-14","value":"0"},{"dateTime":"2016-10-15","value":"0"},{"dateTime":"2016-10-16","value":"0"},{"dateTime":"2016-10-17","value":"0"},{"dateTime":"2016-10-18","value":"0"},{"dateTime":"2016-10-19","value":"0"},{"dateTime":"2016-10-20","value":"0"},{"dateTime":"2016-10-21","value":"0"},{"dateTime":"2016-10-22","value":"0"},{"dateTime":"2016-10-23","value":"0"},{"dateTime":"2016-10-24","value":"0"}]}

class StepDataModel {
ArrayList<Activities_step > activities[];
// ArrayList<Activities_step> activities_steps = new      ArrayList<activities_step>();
public ArrayList<Activities_step>[] getActivities() {
    return activities;
}
public void setActivities(ArrayList<Activities_step>[] activities) {
    this.activities = activities;
}


class Activities_step {
    public String dateTime;
    public String value;

    public String getDateTime() {
        return dateTime;
    }

    public void setDateTime(String dateTime) {
        this.dateTime = dateTime;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }}}


// `I am trying to store json data in activity using:`