Android：我不知道SimpleDateFormat

Question

I have tried and tried, but I cannot get my RSS app to properly format the pubDate into a more user friendly format.

    String str = "26/08/1994";

    SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy"); //please notice the    capital M
  Date date = formatter.parse(str);

That code looks simple enough, but I get an unhandled type parse exception error on formatter.parse(str). Once that gets working, I then need to convert my RSS Pubdate to MM/dd.

The line of code to set the text for that is here:

  listPubdate.setText(myRssFeed.getList().get(position).getPubdate());

Do I just change that to:

  listPubdate.setText(date);

This looks so simple that it's driving me nuts that I can't find the answer.

Answer 1

you can get the date by this

// get the current date
            final Calendar c = Calendar.getInstance();
            mYear = c.get(Calendar.YEAR);
            mMonth = c.get(Calendar.MONTH);
            mDay = c.get(Calendar.DAY_OF_MONTH);

and want to put in simple format then

String date=String.format(mDay+"/"+mMonth+"/"+mYear);

so you can use this very easily.

Answer 2

I get an unhandled type parse exception error on formatter.parse(str)

For that, you'll need to explicitly handle the exception, either by declaring that the currently executing method just throws it, or by catching it. For more information, I highly recommend going through the Exceptions Lesson in the Java Tutorial .

Here's an example of catching the exception.

String str = "26/08/1994";
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy"); //please notice the    capital M
Date date;
try
{
  date = formatter.parse(str);
}
catch (ParseException e)
{
  // Handle error condition.
}

Answer 3

It sounds to me like you are actually running this and getting the error. As others have pointed out, the problem is you need to wrap the formatter.parse call in a try/catch block. This is a compilation problem , not a runtime problem.

The code you have will work as you expect once you fix this compile problem.

Use a second formatter to get the MM/dd output you want.

    String str = "26/08/1994";

    SimpleDateFormat inputFormatter = new SimpleDateFormat("dd/MM/yyyy"); //please notice the    capital M
    SimpleDateFormat outputFormatter = new SimpleDateFormat("MM/dd");

    try {
        Date date = inputFormatter.parse(str);
        String text = outputFormatter.format(date);
        listPubdate.setText(text);
    } catch (ParseException e ) {
        e.printStackTrace();
    }

Answer 4

SimpleDateformat.parse（String）引发一个已检查的异常……将其包装在try / catch块中。

Answer 5

Below is the sample code ... pay attention to format inside SimpleDateFormat Constructor. This string which to be parsed for date should be similar in format to that of string passed in SimpleDateFormat constructor

public Date getDate(String str) { SimpleDateFormat sdFormat = new SimpleDateFormat("EEE MMM dd hh:mm:ss"); Date d = null;

    try {

        String str1 = str.substring(0, str.lastIndexOf(" ")).substring(0,
                str.lastIndexOf(" "));
        String str2 = str1.substring(0, str1.lastIndexOf(" "));
        Log.v("str1", str2);

        d = sdFormat.parse(str2);
    } catch (java.text.ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return d;
}