仿彩之云 APP 启动页和导航页

引导页
此处用四张图片来做引导页面，同时在最后一个页面提供一个按钮，点击进入主界面。

//把引导页加入到集合中，views是一个ArrayList
LayoutInflater inflater = LayoutInflater.from(this);
views.add(inflater.inflate(R.layout.view_guide_01, null));
views.add(inflater.inflate(R.layout.view_guide_02, null));
views.add(inflater.inflate(R.layout.view_guide_03, null));
views.add(inflater.inflate(R.layout.view_guide_04, null));

既然用到了ViewPager，那肯定会用到PagerAdapter并必须实现以下几个方法
destroyItem(), getCount(), instantiateItem(), isViewFromObject()
提示一下destroyItem()，instantiateItem()两个方法在高版本上已经过时了，分别把他们的第一个参数换成ViewGroup 即可。

public class GuidePagerAdapter extends PagerAdapter {
  private List views;
  private Activity activity;

  public GuidePagerAdapter(List views, Activity activity) {
      this.views = views;
      this.activity = activity;
  }

  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {
      container.removeView(views.get(position));
  }

  @Override
  public int getCount() {
      return (views == null) ? 0 : views.size();
  }

  @Override
  public Object instantiateItem(ViewGroup container, int position) {
      container.addView(views.get(position), 0);
      //当滑动到最后一页的时候，监听按钮
      if (position == views.size() - 1) {
          TextView tvEnter = (TextView) container.findViewById(R.id.tv_guide_enter);

          tvEnter.setText(String.format(ResUtil.getString(R.string.guide_enter), APPUtil.getVersionName(activity)));
          tvEnter.setOnClickListener(new View.OnClickListener() {

              @Override
              public void onClick(View v) {
                  //在此记录曾经浏览过导航页，下次启动将不会进入导航页
                  SPUtil.put(Constant.SP_IS_FIRST_LOGIN, true);

                  StartActivityUtil.startActivity(activity, MainActivity.class);
                  activity.finish();
              }
          });
      }
      return views.get(position);
  }

  @Override
  public boolean isViewFromObject(View arg0, Object arg1) {
      return (arg0 == arg1);
  }
}

源码：github.com/GitPhoenix/…