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Android多种方法显示当前日期和时间

2014-01-07 15:28 477 查看
[b]文章选自StackOverflow（简称：SOF）精选问答汇总系列文章之一，本系列文章将为读者分享国外最优质的精彩问与答，供读者学习和了解国外最新技术。本文探讨Android显示当前日期和时间的方法。

[/b]

问题：

RBADS

如何在Android应用中显示当前日期和时间？

答案：

ordid

这个有多种解决方法。我假设你想把当前日期和时间放在TextView上。

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String currentDateTimeString = DateFormat.getDateTimeInstance().format(
new
Date());

// textView is the TextView view that should display it
textView.setText(currentDateTimeString);

文档里可以阅读更多，点击 here 。你可以在那里读到更多信息，来更改用于转换的格式。

user647826

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public class XYZ extends Activity {


/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super
.onCreate(savedInstanceState);

//setContentView(R.layout.main);


Calendar c = Calendar.getInstance();

System.out.println(
"Current time => "
+c.getTime());


SimpleDateFormat df =
new
SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss"
);

String formattedDate = df.format(c.getTime());

// formattedDate have current date/time

Toast.makeText(
this
, formattedDate, Toast.LENGTH_SHORT).show();


  
// Now we display formattedDate value in TextView

TextView txtView =
new
TextView(
this
);

txtView.setText(
"Current Date and Time : "
+formattedDate);

txtView.setGravity(Gravity.CENTER);

txtView.setTextSize(20);

setContentView(txtView);

}


}




Prashant

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public void onCreate(Bundle savedInstanceState) {

super
.onCreate(savedInstanceState);


setContentView(R.layout.main);

Thread myThread =
null
;


Runnable runnable =
new
CountDownRunner();

myThread=
new
Thread(runnable);

myThread.start();


}


public void doWork() {

runOnUiThread(
new
Runnable() {

public void run() {

try
{

TextView txtCurrentTime= (TextView)findViewById(R.id.lbltime);

Date dt =
new
Date();

int hours = dt.getHours();

int minutes = dt.getMinutes();

int seconds = dt.getSeconds();

String curTime = hours +
":"
+minutes +
":"

+seconds;

txtCurrentTime.setText(curTime);

}
catch
(Exception e) {}

}

});

}


class CountDownRunner implements Runnable{

// @Override

public void run() {

while
(!Thread.currentThread().isInterrupted()){

try
{

doWork();

Thread.sleep(1000);

}
catch
(InterruptedException e) {

Thread.currentThread().interrupt();

}
catch
(Exception e){

}

}

}

}


Dave Webb

要展示当前时间， AnalogClockView和DigitalClockView是明智的选择。

例如下面的布局：

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<?xml version=
"1.0"
 
encoding=
"utf-8"
?>

<LinearLayout

xmlns:android=
"http://schemas.android.com/apk/res/android"

android:layout_width=
"fill_parent"

android:layout_height=
"fill_parent"

android:orientation=
"vertical"
>


<AnalogClock

android:layout_width=
"fill_parent"

android:layout_height=
"wrap_content"
/>


<DigitalClock

android:layout_width=
"fill_parent"

android:layout_height=
"wrap_content"

android:gravity=
"center"

android:textSize=
"20sp"
/>

</LinearLayout>


看起来是这个样子：



fred

我自己的展示方法：

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Calendar c = Calendar.getInstance();


String sDate = c.get(Calendar.YEAR) +
"-"

+c.get(Calendar.MONTH)

+
"-"
 
+c.get(Calendar.DAY_OF_MONTH)

+
" at "
 
+c.get(Calendar.HOUR_OF_DAY)

+
":"
 
+c.get(Calendar.MINUTE);


ZuzooVn

如果你想用特定的模式展示日期和时间，可以用这个：

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Date d =
new
Date();

CharSequence s = DateFormat.format(
"yyyy-MM-dd hh:mm:ss"
, d.getTime());


Thomas V J

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Calendar c = Calendar.getInstance();

int month=c.get(Calendar.MONTH)+1;

String sDate = c.get(Calendar.YEAR) +
"-"
+month+
"-"

+c.get(Calendar.DAY_OF_MONTH) +

"T"
 
+c.get(Calendar.HOUR_OF_DAY)+
":"
+c.get(Calendar.MINUTE)+
":"
+c.get(Calendar.SECOND);


这个展示日期的格式是 2010-05-24T18:13:00

chetan

这能显示当前时间和日期：

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public String getCurrDate()

{

String dt;

Date cal = Calendar.getInstance().getTime();

dt = cal.toLocaleString();

return
 
dt;

}


Hemant

如下代码：

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SimpleDateFormat dateFormat =
new
SimpleDateFormat(

"yyyy/MM/dd HH:mm:ss"
);

Calendar cal = Calendar.getInstance();

System.out.println(
"time => "
+dateFormat.format(cal.getTime()));


String time_str = dateFormat.format(cal.getTime());


String[] s = time_str.split(
" "
);


for
(int i = 0; i < s.length; i++) {

 
System.out.println(
"date  => "
+s[i]);

}


int year_sys = Integer.parseInt(s[0].split(
"/"
)[0]);

int month_sys = Integer.parseInt(s[0].split(
"/"
)[1]);

int day_sys = Integer.parseInt(s[0].split(
"/"
)[2]);


int hour_sys = Integer.parseInt(s[1].split(
":"
)[0]);

int min_sys = Integer.parseInt(s[1].split(
":"
)[1]);


System.out.println(
"year_sys  => "
+year_sys);

System.out.println(
"month_sys  => "
+month_sys);

System.out.println(
"day_sys  => "
+day_sys);


System.out.println(
"hour_sys  => "
+hour_sys);

System.out.println(
"min_sys  => "
+min_sys);


原文链接：Display the current time and date in an Android application
                                            

                                        

                        
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