Android多种方法显示当前日期和时间

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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。

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。

String currentDateTimeString = DateFormat.getDateTimeInstance().format(newDate());

// 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

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 = newSimpleDateFormat("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 = newTextView(this);

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

txtView.setGravity(Gravity.CENTER);

txtView.setTextSize(20);

setContentView(txtView);

}

Prashant

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Thread myThread = null;

Runnable runnable = newCountDownRunner();

myThread= newThread(runnable);

myThread.start();

}

public void doWork() {

runOnUiThread(newRunnable() {

public void run() {

try{

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

Date dt = newDate();

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：

<?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：

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：

Date d = newDate();

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

Thomas V J

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：

public String getCurrDate()

{

String dt;

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

dt = cal.toLocaleString();

return dt;

}

Hemant

如下代码：

SimpleDateFormat dateFormat = newSimpleDateFormat(

"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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