相关疑难解决方法(0)

我创建了一个由自定义对象组成的arraylist.基本上用户将创建一个类,每次创建一个类时,都会在arraylist中添加一个新的Lecture(我的自定义对象).我需要保存生成的arraylist,以便即使重新启动应用程序也会保存用户的类.

根据我的理解,我必须使我的课程可序列化.但我究竟是怎么做到的呢？然后一旦它序列化我该怎么办？

public class Lecture{

public String title;
public String startTime;
public String endTime;
public String day;
public boolean classEnabled;

public Lecture(String title, String startTime, String endTime, String day, boolean enable){
    this.title = title;
    this.startTime = startTime;
    this.endTime = endTime;
    this.day = day;
    this.classEnabled = enable;
}
//Getters and setters below

我正在实现一个BaseAdapter,我有一个列表项的TranslateAnimation.

问题是当向下滚动时,其他视图具有相同的偏移量.

这是我的getView()方法实现:

        @Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;
    if (convertView == null) {
            //initialization code
            convertView.setTag(viewHolder);
    } else {
         viewHolder =(ViewHolder) convertView.getTag();
    }

        Animation animation;
        switch (item.getAnimationDirection()) {
        case AnimationDirection.HIDE:
            animation = new TranslateAnimation(itemOffset, 0, 0, 0);
            animation.setDuration(200);
            animation.setFillAfter(true);
            viewHolder.layoutToAnimate.setAnimation(animation);
            item.setAnimationDirection(AnimationDirection.HIDDEN);
            break;
        case AnimationDirection.REVEAL:
            itemOffset = viewHolder.remove.getWidth() + 20;
            animation = new TranslateAnimation(0, itemOffset, 0, 0);
            animation.setDuration(200);
            animation.setFillAfter(true);
            viewHolder.layoutToAnimate.setAnimation(animation);
            item.setAnimationDirection(AnimationDirection.SHOWING);
            break;
        }

        viewHolder.remove.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View …