本文介绍了Android的如何使压延像倒计时?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我使用countdowntimer在我的应用程序,其中我显示简单的日期格式的日期,但我countdowntimer没有显示,简单的时钟是在工作,我想表明我喜欢压延是countdowntimer.Here我的code

 公共类MainActivity延伸活动{
ListView的mListView;
MyCountDownTimer mMyCountDownTimer;
TextView的文本1;
@覆盖
保护无效的onCreate(捆绑savedInstanceState){    super.onCreate(savedInstanceState);
    的setContentView(R.layout.activity_main);    mListView =(ListView控件)findViewById(R.id.listView);
    MyAdapter适配器=新MyAdapter(本);
    mListView.setAdapter(适配器);    mMyCountDownTimer =新MyCountDownTimer(1000,1000,适配器);
}
@覆盖
保护无效onResume(){    super.onResume();
    mMyCountDownTimer.start();
}@覆盖
保护无效的onPause(){    mMyCountDownTimer.cancel();
    super.onPause();
}
// countdowntimerclass
公共类MyCountDownTimer扩展CountDownTimer {    BaseAdapter mAdapter;    公共MyCountDownTimer(长millisInFuture,长countDownInterval,BaseAdapter适配器){        超(mil​​lisInFuture,countDownInterval);
        mAdapter =适配器;
    }    @覆盖
    公共无效onFinish(){        mAdapter.notifyDataSetChanged();
        this.start();
    }    @覆盖
    公共无效onTick(长millisUntilFinished){
        text1.setText(+ millisUntilFinished / 1000);
    }
}
公共类MyAdapter延伸BaseAdapter {    私有静态最终诠释COUNT = 50;
    私人布尔firstscroll = TRUE;
    私人上下文的背景下;
    私人日期格式日期格式;    公共MyAdapter(上下文的背景下){        this.context =背景;    }    @覆盖
    公众诠释的getCount(){        返回计数;
    }    @覆盖
    公共字符串的getItem(INT位置){        回归项目+将String.valueOf(位置);
    }    @覆盖
    众长getItemId(INT位置){        返回的位置;
    }    @覆盖
    公共查看getView(INT位置,查看convertView,父母的ViewGroup){        如果(convertView == NULL){
            convertView = LayoutInflater.from(的getContext()).inflate(android.R.layout.two_line_list_item,父母,假);
        }
        日历C = Calendar.getInstance();
        的System.out.println(当前时间=>中+ c.getTime());        SimpleDateFormat的DF =新的SimpleDateFormat(YYYY-MM-DD HH:MM:SS,Locale.US);
        串formattedDate = df.format(c.getTime());
        文本1 =(TextView中)convertView.findViewById(android.R.id.text1);
        如果(位置== 0){            text1.setText(的getItem(位置).valueOf(formattedDate));
        }
        其他{
            text1.setText(NULL);
        }        返回convertView;
    }    私人CharSequence的getTimeString(INT位置){        如果(位置%2 == 0){            //返回dateFormat.format(Calendar.getInstance()的getTime());
        }
        其他{
            返回null;
        }
        返回null;
    }    民营背景的getContext(){        返回语境;
    }
}
  }

感谢您。


解决方案

 包com.example.diffrence;进口java.text.ParseException;
进口java.text.SimpleDateFormat的;
进口java.util.Date;
进口java.util.Timer中;
进口java.util.TimerTask中;进口android.app.Activity;
进口android.os.Bundle;
进口android.view.Menu;
进口android.widget.LinearLayout;
进口android.widget.TextView;公共类MainActivity延伸活动{    TextView的TXT;
    @覆盖
    保护无效的onCreate(捆绑savedInstanceState){
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.activity_main);
        TXT =(的TextView)findViewById(R.id.test);
        定时器notificationtask =新的Timer();        notificationtask.schedule(新的TimerTask(){
            @覆盖
            公共无效的run(){
                // TODO自动生成方法存根
                runOnUiThread(新的Runnable(){                    @覆盖
                    公共无效的run(){
                        // TODO自动生成方法存根
                        的SimpleDateFormat SimpleDateFormat的=
                                新的SimpleDateFormat(DD / M / YYYY HH:MM:SS);
                     尝试{
                        日期日期1 = simpleDateFormat.parse(2014年10月10日11时三十零分10秒);                        字符串currentDateandTime = simpleDateFormat.format(新的Date());
                        日期DATE2 = simpleDateFormat.parse(currentDateandTime);
                        txt.setText(时间Remainig迄今为止二〇一四年十月一十日11时三十分10秒:+ printDifference(DATE1,DATE2));                    }赶上(ParseException的E){
                        // TODO自动生成catch块
                        e.printStackTrace();
                    }
                    }
                });
            }
        },1000,1000);
    }     公共字符串printDifference(日期的startDate,日期结束日期){            //毫秒
            长不同= endDate.getTime() - startDate.getTime();            的System.out.println(开始日期:+的startDate);
            的System.out.println(结束日期:+结束日期);
            的System.out.println(不同:+不同);            长secondsInMilli = 1000;
            长minutesInMilli = secondsInMilli * 60;
            长hoursInMilli = minutesInMilli * 60;
            长daysInMilli = hoursInMilli * 24;            长ela​​psedDays =不同/ daysInMilli;
            不同的=不同的%daysInMilli;            长ela​​psedHours =不同/ hoursInMilli;
            不同的=不同的%hoursInMilli;            长ela​​psedMinutes =不同/ minutesInMilli;
            不同的=不同的%minutesInMilli;            长ela​​psedSeconds =不同/ secondsInMilli;
            返回Math.abs(elapsedDays)+天+
                    Math.abs(elapsedHours)+小时+
                            Math.abs(elapsedMinutes)+分+
                                    Math.abs(elapsedSeconds)+秒;        }
    @覆盖
    公共布尔onCreateOptionsMenu(菜单菜单){
        //充气菜单;如果是present这增加了项目操作栏。
        。getMenuInflater()膨胀(R.menu.main,菜单);
        返回true;
    }}

I am using countdowntimer in my application,in which I am showing date in simple dateformat but my countdowntimer is not showing , simple clock is working in that, I want to show my calender like countdowntimer.Here is my code.

 public class MainActivity extends Activity {
ListView mListView;
MyCountDownTimer mMyCountDownTimer;
TextView text1;
@Override
protected void onCreate( Bundle savedInstanceState ) {

    super.onCreate( savedInstanceState );
    setContentView( R.layout.activity_main );

    mListView = (ListView) findViewById( R.id.listView );
    MyAdapter adapter = new MyAdapter( this);
    mListView.setAdapter( adapter );

    mMyCountDownTimer = new MyCountDownTimer( 1000, 1000, adapter );
}


@Override
protected void onResume() {

    super.onResume();
    mMyCountDownTimer.start();
}

@Override
protected void onPause() {

    mMyCountDownTimer.cancel();
    super.onPause();
}


//countdowntimerclass
public class MyCountDownTimer extends CountDownTimer {

    BaseAdapter mAdapter;

    public MyCountDownTimer(long millisInFuture, long countDownInterval, BaseAdapter adapter) {

        super( millisInFuture, countDownInterval );
        mAdapter = adapter;
    }

    @Override
    public void onFinish() {

        mAdapter.notifyDataSetChanged();
        this.start();
    }

    @Override
    public void onTick( long millisUntilFinished) {
        text1.setText("" + millisUntilFinished / 1000);
    }


}
public class MyAdapter extends BaseAdapter {

    private static final int COUNT = 50;
    private boolean firstscroll=true;
    private Context context;
    private DateFormat dateFormat;

    public MyAdapter(Context context) {

        this.context = context;

    }

    @Override
    public int getCount() {

        return COUNT;
    }

    @Override
    public String getItem( int position ) {

        return "Item " + String.valueOf( position);
    }

    @Override
    public long getItemId( int position ) {

        return position;
    }

    @Override
    public View getView( int position, View convertView, ViewGroup parent ) {

        if ( convertView == null ) {
            convertView = LayoutInflater.from( getContext() ).inflate( android.R.layout.two_line_list_item, parent, false );
        }
        Calendar c = Calendar.getInstance();
        System.out.println("Current time => "+c.getTime());

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.US);
        String formattedDate = df.format(c.getTime());
        text1 = (TextView) convertView.findViewById( android.R.id.text1 );
        if (position==0 ) {

            text1.setText(getItem(position).valueOf(formattedDate));
        }
        else {
            text1.setText(null);
        }

        return convertView;
    }

    private CharSequence getTimeString( int position ) {

        if ( position % 2 == 0 ) {

            //    return dateFormat.format( Calendar.getInstance().getTime() );
        }
        else {
            return null;
        }
        return null;
    }

    private Context getContext() {

        return context;
    }
}


  }

thank you.

解决方案
package com.example.diffrence;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

    TextView txt;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txt = (TextView) findViewById(R.id.test);


        Timer notificationtask = new Timer();

        notificationtask.schedule(new TimerTask() {
            @Override
            public void run() {
                // TODO Auto-generated method stub
                runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                        // TODO Auto-generated method stub
                        SimpleDateFormat simpleDateFormat = 
                                new SimpleDateFormat("dd/M/yyyy hh:mm:ss");
                     try {
                        Date date1 = simpleDateFormat.parse("10/10/2014 11:30:10");

                        String currentDateandTime = simpleDateFormat.format(new Date());
                        Date date2 = simpleDateFormat.parse(currentDateandTime);
                        txt.setText("time Remainig to date 10/10/2014 11:30:10    : " + printDifference(date1,date2));

                    } catch (ParseException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    }
                });
            }
        }, 1000, 1000);




    }

     public String printDifference(Date startDate, Date endDate){

            //milliseconds
            long different = endDate.getTime() - startDate.getTime();

            System.out.println("startDate : " + startDate);
            System.out.println("endDate : "+ endDate);
            System.out.println("different : " + different);

            long secondsInMilli = 1000;
            long minutesInMilli = secondsInMilli * 60;
            long hoursInMilli = minutesInMilli * 60;
            long daysInMilli = hoursInMilli * 24;

            long elapsedDays = different / daysInMilli;
            different = different % daysInMilli;

            long elapsedHours = different / hoursInMilli;
            different = different % hoursInMilli;

            long elapsedMinutes = different / minutesInMilli;
            different = different % minutesInMilli;

            long elapsedSeconds = different / secondsInMilli;


            return  Math.abs(elapsedDays) + " days     " +
                    Math.abs(elapsedHours)+ " hours   " +
                            Math.abs(elapsedMinutes)+ " minute   " +
                                    Math.abs(elapsedSeconds) + " Seconds  ";

        }






    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

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10-28 15:18