android 日期时间格式转换；软键盘显示消失-优快云博客

本文介绍了Android中使用DateUtils和DateFormat进行时间日期格式化的多种方法，包括显示当前时间的12小时制或24小时制格式、判断消息是否为今日发送并据此调整显示格式等实用技巧。

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private static int flagsDate = DateUtils.FORMAT_SHOW_DATE; private static int flagsTime = DateUtils.FORMAT_SHOW_TIME ; private static int flagsWeek = DateUtils.FORMAT_SHOW_WEEKDAY; String dateStr = (String)DateUtils.formatDateTime(context, System.currentTimeMillis(), flagsDate);//5月11日 String timeStr = (String)DateUtils.formatDateTime(context, System.currentTimeMillis(), flagsTime);//16：40 String weekStr = (String)DateUtils.formatDateTime(context, System.currentTimeMillis(), flagsWeek);//星期二

12小时格式时，获取上午还是下午：

String smPmStr = DateUtils.getAMPMString(Calendar.getInstance().get(Calendar.AM_PM));//上午（下午）

12小时时间格式时，只显示时间，不显示“上午“这样的字符串：

private final static String M12 = "h:mm"; private final static String M24 = "kk:mm"; formatTime = android.text.format.DateFormat.is24HourFormat(context)? M24 : M12; String timeStr = (String) DateFormat.format(formatTime,System.currentTimeMillis());

将系统当前事件，转化为所需格式：

long dateTaken = System.currentTimeMillis(); if (dateTaken != 0) { String datetime = DateFormat.format("yyyy:MM:dd kk:mm:ss", dateTaken).toString(); Log.e(TAG,"datetime : " + datetime); }

如果为今天，则显示时间，如果不是今天则显示日期

private String getDate(long dateTime) { int flags = 0; String date = ""; if (DateUtils.isToday(dateTime)) { flags = DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_24HOUR; date = (String)DateUtils.formatDateTime(mContext, dateTime, flags); } else { flags = DateUtils.FORMAT_SHOW_DATE; date = (String)DateUtils.formatDateTime(mContext, dateTime, flags); } return date; }

在源码短信息模块中MessageUtils.java中有这样一个函数，与上面的功能相同：

public static String formatTimeStampString(Context context, long when, boolean fullFormat) { Time then = new Time(); then.set(when); Time now = new Time(); now.setToNow(); // Basic settings for formatDateTime() we want for all cases. int format_flags = DateUtils.FORMAT_NO_NOON_MIDNIGHT | DateUtils.FORMAT_ABBREV_ALL | DateUtils.FORMAT_CAP_AMPM; // If the message is from a different year, show the date and year. if (then.year != now.year) { format_flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE; } else if (then.yearDay != now.yearDay) { // If it is from a different day than today, show only the date. format_flags |= DateUtils.FORMAT_SHOW_DATE; } else { // Otherwise, if the message is from today, show the time. format_flags |= DateUtils.FORMAT_SHOW_TIME; } // If the caller has asked for full details, make sure to show the date // and time no matter what we've determined above (but still make showing // the year only happen if it is a different year from today). if (fullFormat) { format_flags |= (DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_TIME); } return DateUtils.formatDateTime(context, when, format_flags); }

软键盘显示消失及取反

InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE); View view = getCurrentFocus(); if (view != null){ // imm.showSoftInput(view, 0); //显示软键盘 imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS); // imm.hideSoftInputFromWindow(view.getWindowToken(), 0);//隐藏软键盘 // InputMethodManager.HIDE_NOT_ALWAYS); }

或者

getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);

或者

public void hideInputMethod() { InputMethodManager imm = getInputMethodManager(); if (imm != null) { imm.hideSoftInputFromWindow(getWindowToken(), 0); } }

public void showInputMethod() { InputMethodManager imm = getInputMethodManager(); if (imm != null) { imm.showSoftInput(this, 0); } }