Question

I want to print date and in android. Once I run it for first time its getting correct time and date. But When I install in phone and run it its not getting correct. Its giving only same result when I have install it. my code is here:

package com.datePrint;

    import java.util.Calendar;
    import java.util.GregorianCalendar;

    import android.app.Activity;
    import android.os.Bundle;
    import android.widget.TextView;

    public class DatePrint extends Activity {
        /** Called when the activity is first created. */

        static Calendar cal = new GregorianCalendar();
        static int hour = cal.get(Calendar.HOUR);
        static int minute = cal.get(Calendar.MINUTE);
        static int second = cal.get(Calendar.SECOND);
        static int year = cal.get(Calendar.YEAR);
        static int month = cal.get(Calendar.MONTH)+1;
        static int day = cal.get(Calendar.DATE);
        static String date = day+"_"+month+"_"+year+"_";
        static String Current_Time = date+ hour + "_" + minute + "_" + second;

        public static String OUTPUT_FILE = "/sdcard/"+Current_Time+".mp4";
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            TextView tv = new TextView(this);

            tv.setText(Current_Time);
            setContentView(tv);
        }
    }

can anybody help me to solve this problem thanks in advance

Answer 1

您已宣布所有变量为>:static,因此,首先remove it。

你们应当提及并理解静态的概念。

Answer 2

我确信,在你的情况中,APIC水平是不同的。我面临同样问题的时间不多。当我用1.6个装置运行时,它会做罚款,但不是在2.1个 em子上。

尝试这项法典。

java.text.SimpleDateFormat format = new SimpleDateFormat(
            "dd-MM-yyyy");
            SimpleDateFormat sdfDestination = new SimpleDateFormat("E MMM dd");

            java.util.Calendar cal = Calendar.getInstance(new SimpleTimeZone(0,
                    "GMT+5000"));

            TimeZone timeZone = TimeZone.getDefault();
            format.setTimeZone(timeZone);
            format.setCalendar(cal);            
            java.util.Date date = null;
            String tmp ="";
            try {
                date = format.parse(EditProfile.dateOFBirth);
                Log.v("A", "Date Of Birth ..." + date);
                Calendar tmpCal = Calendar.getInstance();
                tmpCal.setTime(date);
                tmp =  sdfDestination.format(date) + " 00:00:00 IST "+tmpCal.get(Calendar.YEAR);
                Log.v("A", "Date Of Birth new Date..." + tmp);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

Answer 3

@PM has it for the most part, but didn t explain why and missed one key point: An activity keeps running until something kills it (either by explicit shutdown which you didn;t provide for, by the OS killing it to release resources, or Force Close from the application services panel), so "running" it a second time just reactivates it with the same values still loaded into the static variables. If you force close it, the next activation will recreate it with a new time, which it will then retain until again Force Close-d.

而缺失的关键点是,你会重新这样做,即便没有固定变量,也只会一度发生。你们要么在启动,要么安排退出活动。

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