Question

我正在寻找使用Andengine的倒计时教程。这是我需要用app做的事情，即我需要计算到特定日期，当它到达那个日期时它必须显示一些消息，当该日期过去时它必须一次再次显示倒计时到明年的那个日期。如何实现这个。我搜索了各种教程，但我无法找到。希望有人能帮助我。

更新： clocktext = new Text（CAMERA_WIDTH / 4.4f，CAMERA_HEIGHT / 3.6f，this.mFont，“Hello AndEngine！”，this.getVertexBufferObjectManager（））;

      Calendar thatDay = Calendar.getInstance();
      thatDay.set(Calendar.DAY_OF_MONTH,30);
      thatDay.set(Calendar.MONTH,9); // 0-11 so 1 less
      thatDay.set(Calendar.YEAR, 2014);

      Calendar today = Calendar.getInstance();

      //long diff = today.getTimeInMillis() - thatDay.getTimeInMillis(); //result in millis
      long diff = thatDay.getTimeInMillis()-today.getTimeInMillis(); //result in millis
      long days = diff / (24 * 60 * 60 * 1000);

    this.remain = days;
        if(remain<0){

      clocktext = new Text(CAMERA_WIDTH/9.8f, CAMERA_HEIGHT/1.4f,this.mFont, remain + "", this.getVertexBufferObjectManager());
      }if(remain==0){
          clocktext = new Text(CAMERA_WIDTH/9.8f, CAMERA_HEIGHT/1.4f,this.mFont, "HAPPY HALLOWEEN", this.getVertexBufferObjectManager());
      }if(remain>0){
          clocktext = new Text(CAMERA_WIDTH/9.8f, CAMERA_HEIGHT/1.4f,this.mFont, remain + "", this.getVertexBufferObjectManager());
      }

Answer 1

以下是代码片段：

package de.goddchen.android.andthrow.library;

import org.anddev.andengine.engine.handler.IUpdateHandler;

public class CountDownTimer implements IUpdateHandler {

    private float timerSeconds;

    private float timerInterval;

    private float lastCall;

    private boolean isRunning;

    private float timeElapsed;

    private iCountDownListener listener;

    public interface iCountDownListener {
        public void onIntervalElapsed(float timeRemaining, CountDownTimer timer);

        public void onCountDownEnded(CountDownTimer timer);
    }

    public CountDownTimer(float timerSeconds, float timerInterval,
            iCountDownListener listener) {
        this.timerInterval = timerInterval;
        this.timerSeconds = timerSeconds;
        this.listener = listener;
        this.isRunning = true;
    }

    @Override
    public void onUpdate(float pSecondsElapsed) {
        timeElapsed += pSecondsElapsed;
        // Log.d(getClass().getSimpleName(), "elapsed: " + timeElapsed);
        if (isRunning) {
            if (timeElapsed - lastCall > timerInterval) {
                listener.onIntervalElapsed(timerSeconds - timeElapsed, this);
                lastCall = timeElapsed;
            }
            if (timeElapsed > timerSeconds) {
                listener.onCountDownEnded(this);
                cancel();
            }
        }
    }

    @Override
    public void reset() {

    }

    public void cancel() {
        isRunning = false;
    }

}

使用Andengine的倒计时日期/天数

1 个答案: