Android基础常用日期操作工具类

将指定日期格式转换为毫秒(一)

public class DataUtil {

/**
* "2015-01-01" 将指定的日期格式转换为毫秒
* @param time
* @return
*/
public static long  getStringToTime(String time){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
return sdf.parse(time).getTime();
} catch (ParseException e) {
e.printStackTrace();
}
return 0;
}
}

将毫秒数转换成指定格式日期

public static String timeToDate(long string){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
return sdf.format(string);

}

将long类型的毫秒值转换成固定日期格式

private String toData(long string) {
if (string == 0) {
return "";
}
DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd  hh:mm");
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(string);
return formatter.format(calendar.getTime());
}

将固定日期转换成long类型的毫秒值(二)

private long getEditeViewResultTime(TextView mEtItem82) {
String trim = mEtItem82.getText().toString();
long millionSeconds = 0;
if (!TextUtils.isEmpty(trim)) {

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd  hh:mm");

try {
millionSeconds = sdf.parse(trim).getTime();

} catch (ParseException e) {
e.printStackTrace();
} // 毫秒
}

return millionSeconds;
}

将固定的日期转换

private String toDateString(String time) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd  hh:mm");
Date date = new Date(time);
String str = sdf.format(date);
return str;
}

public class DateUtils {

public static String toDate(Date date) {
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
return dateFormat.format(date);
}

public static Date getLastdayDate(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DATE, -1);
return calendar.getTime();
}

public static Date getNextdayDate(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DATE, 1);
return calendar.getTime();
}