blocks|key|1327504|text|好吧，这并不难，因为有几种方法可以做到这一点。我假设您想要将当前日期和时间放入TextView中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1327505|String+currentDateTimeString+=+java.text.DateFormat.getDateTimeInstance().format(new+Date());

//+textView+is+the+TextView+view+that+should+display+it
textView.setText(currentDateTimeString);|code-block|syntax|javascript|1327506|在here很容易找到的文档中有更多可供阅读的内容。在那里，您将找到有关如何更改用于转换的格式的更多信息。|1327507|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/java/text/DateFormat.html#getDateTimeInstance%2528%2529^0|13|8|0|0|1|4|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Okay, not that hard as there are several methods to do this. I assume you want to put the current date &amp; time into a <code>TextView</code>.

<pre><code>String currentDateTimeString = java.text.DateFormat.getDateTimeInstance().format(new Date());

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

There is more to read in the documentation that can easily be found <a href="http://developer.android.com/reference/java/text/DateFormat.html#getDateTimeInstance%28%29" rel="noreferrer">here</a>
. There you'll find more information on how to change the format used for conversion.

blocks|key|1327717|text|显示时间的明显选择是AnalogClock+View和DigitalClock+View。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1327718|例如，以下布局：|1327719|<?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>|code-block|syntax|javascript|1327720|看起来像这样：|1327721|​|1327722|📷|atomic|1327723|1327724|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/intl/fr/reference/android/widget/AnalogClock.html|1|http://developer.android.com/intl/fr/reference/android/widget/DigitalClock.html|2|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b92a052f22d00bf4e4775f30a8d21def.png|imageAlt^0|A|B|R|C|A|G|0|R|H|1|0|0|0|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@$9|1F|A|1G|1|1H]|$9|1I|A|1J|1|1K]]|E|$]]|$1|F|3|G|5|6|7|1L|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1M|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1N|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1O|8|@]|D|@]|E|$]]|$1|Q|3|R|5|S|7|1P|8|@]|D|@$9|1Q|A|1R|1|1S]]|E|$]]|$1|T|3|P|5|6|7|1T|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|1U|8|@]|D|@]|E|$]]]|V|$W|$5|X|Y|Z|E|$10|11]]|12|$5|X|Y|Z|E|$10|13]]|14|$5|15|Y|16|E|$17|18|19|-4]]]]

The obvious choices for displaying the time are the <a href="http://developer.android.com/intl/fr/reference/android/widget/AnalogClock.html" rel="noreferrer"><code>AnalogClock</code> View</a> and the <a href="http://developer.android.com/intl/fr/reference/android/widget/DigitalClock.html" rel="noreferrer"><code>DigitalClock</code> View</a>.

For example, the following layout:

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent" 
 android:orientation="vertical"&gt;

 &lt;AnalogClock
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content"/&gt;

 &lt;DigitalClock 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:gravity="center" 
 android:textSize="20sp"/&gt;
&lt;/LinearLayout&gt;
</code></pre>

Looks like this:

<img src="https://content.screencast.com/users/davweb/folders/Snagit/media/5d8976bd-4833-4a3f-a3a5-74cbed922891/02.16.2010-09.09.17.png" alt="screenshot">

blocks|key|1327754|text|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+%2B+":"+%2B+minutes+%2B+":"+%2B+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){
++++++++++++++++}
++++++++++++}
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1327755|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>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){
 }
 }
 }
}
</code></pre>

blocks|key|1327820|text|我自己的工作解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1327821|Calendar+c+=+Calendar.getInstance();

String+sDate+=+c.get(Calendar.YEAR)+%2B+"-"+
%2B+c.get(Calendar.MONTH)
%2B+"-"+%2B+c.get(Calendar.DAY_OF_MONTH)+
%2B+"+at+"+%2B+c.get(Calendar.HOUR_OF_DAY)+
%2B+":"+%2B+c.get(Calendar.MINUTE);|code-block|syntax|javascript|1327822|希望这能有所帮助！|1327823|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

My own working solution:

<pre><code>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);
</code></pre>

Hope this helps!

blocks|key|1112722|text|这将提供当前日期和时间：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1112723|public+String+getCurrDate()
{
++++String+dt;
++++Date+cal+=+Calendar.getInstance().getTime();
++++dt+=+cal.toLocaleString();
++++return+dt;
}|code-block|syntax|javascript|1112724|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This would give the current date and time:

<pre><code>public String getCurrDate()
{
 String dt;
 Date cal = Calendar.getInstance().getTime();
 dt = cal.toLocaleString();
 return dt;
}
</code></pre>

blocks|key|1112795|text|来自How+to+get+full+date+with+correct+format?|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1112796|请使用|1112797|android.text.format.DateFormat.getDateFormat(Context+context)
android.text.format.DateFormat.getTimeFormat(Context+context)|code-block|syntax|javascript|1112798|根据当前用户设置(例如12/24时间格式)获取有效的时间和日期格式。|1112799|import+android.text.format.DateFormat;

private+void+some()+{
++++final+Calendar+t+=+Calendar.getInstance();
++++textView.setText(DateFormat.getTimeFormat(this/*Context*/).format(t.getTime()));
}|1112800|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/7054945/how-to-get-full-date-with-correct-format^0|2|15|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

From <a href="https://stackoverflow.com/questions/7054945/how-to-get-full-date-with-correct-format">How to get full date with correct format?</a>:

Please, use

<pre><code>android.text.format.DateFormat.getDateFormat(Context context)
android.text.format.DateFormat.getTimeFormat(Context context)
</code></pre>

to get valid time and date formats in sense of current user settings (12/24 time format, for example).

<pre><code>import android.text.format.DateFormat;

private void some() {
 final Calendar t = Calendar.getInstance();
 textView.setText(DateFormat.getTimeFormat(this/*Context*/).format(t.getTime()));
}
</code></pre>

blocks|key|1328030|text|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+=>+"%2Bc.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+:+"%2BformattedDate);
++++++++txtView.setGravity(Gravity.CENTER);
++++++++txtView.setTextSize(20);
++++++++setContentView(txtView);
++++}

}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1328031|​|unstyled|1328032|📷|atomic|offset|length|1328033|1328034|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/6ec5dd45ae9a7e6b5dec4a5629ab4155.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|X|8|@]|9|@$J|Y|K|Z|1|10]]|A|$]]|$1|L|3|E|5|F|7|11|8|@]|9|@]|A|$]]|$1|M|3|-4|5|F|7|12|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T|U|-4]]]]

<pre><code>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 =&gt; "+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);
 }

}
</code></pre>

<img src="https://i.stack.imgur.com/vuNVA.png" alt="enter image description here">

blocks|key|1328273|text|如果想以特定模式获取日期和时间，可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1328274|Date+d+=+new+Date();
CharSequence+s+=+DateFormat.format("yyyy-MM-dd+hh:mm:ss",+d.getTime());|code-block|syntax|javascript|1328275|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you want to get the date and time in a specific pattern you can use

<pre><code>Date d = new Date();
CharSequence s = DateFormat.format("yyyy-MM-dd hh:mm:ss", d.getTime());
</code></pre>

blocks|key|1328307|text|Calendar+c+=+Calendar.getInstance();
int+month=c.get(Calendar.MONTH)%2B1;
String+sDate+=+c.get(Calendar.YEAR)+%2B+"-"+%2B+month%2B+"-"+%2B+c.get(Calendar.DAY_OF_MONTH)+%2B
"T"+%2B+c.get(Calendar.HOUR_OF_DAY)%2B":"%2Bc.get(Calendar.MINUTE)%2B":"%2Bc.get(Calendar.SECOND);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1328308|这将提供类似2010-05-24T18:13:00的日期时间格式|unstyled|1328309|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>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);
</code></pre>

This will give date time format like
2010-05-24T18:13:00

blocks|key|1328317|text|试试下面的代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1328318|SimpleDateFormat+dateFormat+=+new+SimpleDateFormat(
++++++++++++++++++++++++++++++++++++"yyyy/MM/dd+HH:mm:ss");

Calendar+cal+=+Calendar.getInstance();
System.out.println("time+=>+"+%2B+dateFormat.format(cal.getTime()));

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

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

for+(int+i+=+0;+i+<+s.length;+i%2B%2B)+{
+++++System.out.println("date++=>+"+%2B+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++=>+"+%2B+year_sys);
System.out.println("month_sys++=>+"+%2B+month_sys);
System.out.println("day_sys++=>+"+%2B+day_sys);

System.out.println("hour_sys++=>+"+%2B+hour_sys);
System.out.println("min_sys++=>+"+%2B+min_sys);|code-block|syntax|javascript|1328319|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try the below code:

<pre><code>SimpleDateFormat dateFormat = new SimpleDateFormat(
 "yyyy/MM/dd HH:mm:ss");

Calendar cal = Calendar.getInstance();
System.out.println("time =&gt; " + dateFormat.format(cal.getTime()));

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

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

for (int i = 0; i &lt; s.length; i++) {
 System.out.println("date =&gt; " + 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 =&gt; " + year_sys);
System.out.println("month_sys =&gt; " + month_sys);
System.out.println("day_sys =&gt; " + day_sys);

System.out.println("hour_sys =&gt; " + hour_sys);
System.out.println("min_sys =&gt; " + min_sys);
</code></pre>

blocks|key|1328360|text|String+formattedDate+=+new+SimpleDateFormat("yyyy-MM-dd+HH:mm:ss").format(Calendar.getInstance().getTime());+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1328361|使用formattedDate作为填充日期的String。|unstyled|offset|length|style|CODE|1328362|在我的例子中：mDateButton.setText(formattedDate);|1328363|entityMap^0|0|2|D|M|6|0|7|Z|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@$G|Q|H|R|I|J]|$G|S|H|T|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@$G|V|H|W|I|J]]|9|@]|A|$]]|$1|M|3|-4|5|F|7|X|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>String formattedDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime()); 
</code></pre>

Use <code>formattedDate</code> as your <code>String</code> filled with the date. 
In my case: <code>mDateButton.setText(formattedDate);</code>

blocks|key|1328401|text|实际上，最好使用TextClock小部件。它将为您处理所有的复杂性，并将尊重用户的12/24小时偏好。http://developer.android.com/reference/android/widget/TextClock.html|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1328402|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/widget/TextClock.html^0|1F|1W|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Actually, you're best off with the TextClock widget. It handles all of the complexity for you and will respect the user's 12/24hr preferences.
<a href="http://developer.android.com/reference/android/widget/TextClock.html">http://developer.android.com/reference/android/widget/TextClock.html</a>

blocks|key|1113322|text|这是为我工作的代码。请试一下这个。这是一个从系统调用中获取时间和日期的简单方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1113323|public+static+String+getDatetime()+{
++++Calendar+c+=+Calendar+.getInstance();
++++System.out.println("Current+time+=>+"%2Bc.getTime());
++++SimpleDateFormat+df+=+new+SimpleDateFormat("yyyy-MM-dd+HH:mms");
++++String+formattedDate+=+df.format(c.getTime());
++++return+formattedDate;
}|code-block|syntax|javascript|1113324|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is the code which worked for me. Please try this. It is a simple method which takes time and date from a system call.
<pre class="lang-java prettyprint-override"><code>public static String getDatetime() {
 Calendar c = Calendar .getInstance();
 System.out.println(&quot;Current time =&gt; &quot;+c.getTime());
 SimpleDateFormat df = new SimpleDateFormat(&quot;yyyy-MM-dd HH:mms&quot;);
 String formattedDate = df.format(c.getTime());
 return formattedDate;
}
</code></pre>

blocks|key|1113329|text|使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1113330|Calendar+c+=+Calendar.getInstance();

int+seconds+=+c.get(Calendar.SECOND);
int+minutes+=+c.get(Calendar.MINUTE);
int+hour+=+c.get(Calendar.HOUR);
String+time+=+hour+%2B+":"+%2B+minutes+%2B+":"+%2B+seconds;


int+day+=+c.get(Calendar.DAY_OF_MONTH);
int+month+=+c.get(Calendar.MONTH);
int+year+=+c.get(Calendar.YEAR);
String+date+=+day+%2B+"/"+%2B+month+%2B+"/"+%2B+year;

//+Assuming+that+you+need+date+and+time+in+a+separate
//+textview+named+txt_date+and+txt_time.

txt_date.setText(date);
txt_time.setText(time);|code-block|syntax|javascript|1113331|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use:

<pre><code>Calendar c = Calendar.getInstance();

int seconds = c.get(Calendar.SECOND);
int minutes = c.get(Calendar.MINUTE);
int hour = c.get(Calendar.HOUR);
String time = hour + ":" + minutes + ":" + seconds;


int day = c.get(Calendar.DAY_OF_MONTH);
int month = c.get(Calendar.MONTH);
int year = c.get(Calendar.YEAR);
String date = day + "/" + month + "/" + year;

// Assuming that you need date and time in a separate
// textview named txt_date and txt_time.

txt_date.setText(date);
txt_time.setText(time);
</code></pre>

blocks|key|1328505|text|只需复制这段代码，希望这对你来说没什么问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1328506|Calendar+c+=+Calendar.getInstance();
SimpleDateFormat+sdf+=+new+SimpleDateFormat("dd:MMMM:yyyy+HH:mm:ss+a");
String+strDate+=+sdf.format(c.getTime());|code-block|syntax|javascript|1328507|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Simply copy this code and hope this works fine for you.

<pre><code>Calendar c = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("dd:MMMM:yyyy HH:mm:ss a");
String strDate = sdf.format(c.getTime());
</code></pre>

blocks|key|1328719|text|如果你想要一行代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1328720|String+date+=+new+SimpleDateFormat("yyyy-MM-dd+HH:mm:ss").format(Calendar.getInstance().getTime());|code-block|syntax|javascript|1328721|结果是"2016-09-25+16:50:34"|offset|length|style|CODE|1328722|entityMap^0|0|0|3|L|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

In case you want a single line of code:

<pre><code>String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());
</code></pre>

The result is <code>"2016-09-25 16:50:34"</code>

blocks|key|1328734|text|String+currentDateandTime+=+new+SimpleDateFormat("yyyy-MM-dd+HH:mm:ss").format(new+Date());
Toast.makeText(getApplicationContext(),+currentDateandTime,+Toast.LENGTH_SHORT).show();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1328735|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>String currentDateandTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
Toast.makeText(getApplicationContext(), currentDateandTime, Toast.LENGTH_SHORT).show();
</code></pre>

blocks|key|1328742|text|SimpleDateFormat+format+=+new+SimpleDateFormat("dd/MM/yyyy");
Calendar+c+=+Calendar.getInstance();
Date+date+=+Calendar.getInstance().getTime();
String+sDate+=+format.format(date);//31-12-9999
int+mYear+=+c.get(Calendar.YEAR);//9999
int+mMonth+=+c.get(Calendar.MONTH);
mMonth+=+mMonth+%2B+1;//12
int+hrs+=+c.get(Calendar.HOUR_OF_DAY);//24
int+min+=+c.get(Calendar.MINUTE);//59
String+AMPM;
if+(c.get(Calendar.AM_PM)+==+0)+{
++++AMPM+=+"AM";
}+else+{
++++AMPM+=+"PM";
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1328743|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
Calendar c = Calendar.getInstance();
Date date = Calendar.getInstance().getTime();
String sDate = format.format(date);//31-12-9999
int mYear = c.get(Calendar.YEAR);//9999
int mMonth = c.get(Calendar.MONTH);
mMonth = mMonth + 1;//12
int hrs = c.get(Calendar.HOUR_OF_DAY);//24
int min = c.get(Calendar.MINUTE);//59
String AMPM;
if (c.get(Calendar.AM_PM) == 0) {
 AMPM = "AM";
} else {
 AMPM = "PM";
}
</code></pre>

blocks|key|1328775|text|你可以试试这种方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1328776|Calendar+calendar+=+Calendar.getInstance();
SimpleDateFormat+mdformat+=+new+SimpleDateFormat("HH:mm:ss");
String+strDate+=+"Current+Time+:+"+%2B+mdformat.format(calendar.getTime());|code-block|syntax|javascript|1328777|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You Can try this way

<pre><code>Calendar calendar = Calendar.getInstance();
SimpleDateFormat mdformat = new SimpleDateFormat("HH:mm:ss");
String strDate = "Current Time : " + mdformat.format(calendar.getTime());
</code></pre>

blocks|key|1113734|text|如果你想在安卓系统中处理日期/时间，我建议你使用ThreeTenABP，这是java.time.*包的一个版本(从安卓上的API26开始)，随Java8一起提供，可以替代java.util.Date和java.util.Calendar。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1113735|LocalDate+localDate+=+LocalDate.now();
DateTimeFormatter+formatter+=+DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM);
String+date+=+localDate.format(formatter);
textView.setText(date);|code-block|syntax|javascript|1113736|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/JakeWharton/ThreeTenABP^0|12|B|2D|E|2S|I|O|B|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

If you wish to work with date/time in android I recommend you to use <a href="https://github.com/JakeWharton/ThreeTenABP" rel="nofollow noreferrer">ThreeTenABP</a> which is a version of <code>java.time.*</code> package (available starting from API 26 on android) shipped with Java 8 available as a replacement for <code>java.util.Date</code> and <code>java.util.Calendar</code>. 

<pre><code>LocalDate localDate = LocalDate.now();
DateTimeFormatter formatter = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM);
String date = localDate.format(formatter);
textView.setText(date);
</code></pre>

How do I display the current date and time in an Android application?

Display the current time and date in an Android application

Android

如何在Android应用程序中显示当前日期和时间？

问在Android应用程序中显示当前时间和日期
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