工具类

专门提供的LogUtils

public class LogUtils {

    public static final boolean isDebug = true;//可以在application的onCreate（）中初始化
    private static String TAG = "ida";

    public static void i(String msg) {//info 信息
        if (isDebug) {
            Log.i(TAG, msg);
        }
    }
    public static void e(String msg) {//error 错误
        if (isDebug) {
            Log.e(TAG, msg);
        }
    }
    public static void d(String msg) {//debug 调试
        if (isDebug) {
            Log.d(TAG, msg);
        }
    }
    public static void w(String msg) {//warn 警告
        if (isDebug) {
            Log.w(TAG, msg);
        }
    }
    // 自己定义的tag
    public static void i(String tag,String msg) {//info
        if (isDebug) {
            Log.i(tag, msg);
        }
    }
    public static void e(String tag,String msg) {//error
        if (isDebug) {
            Log.e(tag, msg);
        }
    }
    public static void d(String tag,String msg) {//debug
        if (isDebug) {
            Log.d(tag, msg);
        }
    }
    public static void w(String tag,String msg) {//warn
        if (isDebug) {
            Log.w(tag, msg);
        }
    }
}

时间的工具类 包括时间戳转化为字符串，字符串转化为时间戳，获得当前月份以及前11个月份的集合

/**
 * Created by ida on 18-2-8.
 */

public class TimeUtils {

    //将时间戳转化为日期字符串
    public static String toDate(long time) {
        String date = "";
        Date d = new Date(time);
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        date = format.format(d);
        return date;
    }

    //将日期字符串转化为时间戳
    public static long toTime(String date) {
        long time = 0;
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        try {
            Date date1 = format.parse(date);
            time = date1.getTime();
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return time;

    }

    //当前月份的前11个月（总共12个月）
    public static ArrayList<String> year() {
        ArrayList<String> list = new ArrayList<>();
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM");
        String today = dateFormat.format(cal.getTime());
        list.add(today);
        for (int i = 0; i < 11; i++) {
            if (cal.get(Calendar.MONTH) - i < 1) {
                list.add(cal.get(Calendar.YEAR) - 1 + "-" + fillZero(cal.get(Calendar.MONTH)-i+12));
            } else {
                list.add(cal.get(Calendar.YEAR) + "-" + fillZero(cal.get(Calendar.MONTH) - i));
            }
        }
        return list;

    }

    private static  String fillZero(int i) {
        String str = "";
        if (i > 0 && i < 10) {
            str = "0" + i;
        } else {
            str = i + "";
        }
        return str;
    }