初体验之ViewPager

ViewPager

注意事项

• 不知为何将RecyclerView和ViewPager搞混
• 里面有滑动的控件的时候要注意,滑动冲突
• 标签页最好使用Fragment,对应的适配器Adapter也就要继承FragmentPagerAdapter

主要步骤

1. 准备几个需要显示的Fragment,代码如下:

  ManageFragment layManage = new ManageFragment();
  SettingFragment laySetting = new SettingFragment();
  SurveyFragment laySurvey = new SurveyFragment();

2. 讲Fragment加添到List<Fragment>,代码如下:

  private List<Fragment> mFragmentList;//Tab页面

  mFragmentList = new ArrayList<>();
  mFragmentList.add(layManage);
  mFragmentList.add(laySetting);
  mFragmentList.add(laySurvey);

3. 自定义适配器FragmentPagerAdapter,代码如下:

public class MainTabAdapter extends FragmentPagerAdapter{
    private List<Fragment> mListFragment;
    public MainTabAdapter (FragmentManager fragmentManager, List<Fragment> mListFragment){
        super(fragmentManager);
        this.mListFragment = mListFragment;
    }
    @Override
    public Fragment getItem(int position) {
        return mListFragment.get(position);
    }

    @Override
    public int getCount() {
        if (mListFragment != null )
            return mListFragment.size();
        return 0;
    }
}//简单框架并没有添加什么操作

4. 添加适配器,代码如下:

private ViewPager mViewPager;

mViewPager.setAdapter(new MainTabAdapter(getSupportFragmentManager(),
                mFragmentList));

5.配置滑动监听,代码如下:

class TabPagerChangeLister implements ViewPager.OnPageChangeListener{
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }

        @Override
        public void onPageSelected(int position) {
            Animation animation= null;
            switch (position){
                case PAGE_MANAGE:
                    if (currentIndex == PAGE_SETTING){

                    }else if(currentIndex == PAGE_SURVEY ){

                    }
                    break;
                case PAGE_SETTING:
                    if (currentIndex == PAGE_MANAGE){

                    }else if (currentIndex == PAGE_SURVEY){

                    }
                    break;
                case PAGE_SURVEY:
                    if (currentIndex == PAGE_MANAGE){

                    }else if (currentIndex == PAGE_SETTING){

                    }
                    break;
                default:
                    break;
            }
        }
    }

6.(可选)需要标签切换的时候可以添加几个TextView,代码如下:

private TextView manage;
private TextView setting;
private TextView survey;

manage = (TextView)findViewById(R.id.tv_tab_manage);
setting = (TextView)findViewById(R.id.tv_tab_setting);
survey = (TextView)findViewById(R.id.tv_tab_survey);

manage.setOnClickListener(this);
setting.setOnClickListener(this);
survey.setOnClickListener(this);

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.tv_tab_manage:
                mViewPager.setCurrentItem(PAGE_MANAGE);
                break;
            case R.id.tv_tab_setting:
                mViewPager.setCurrentItem(PAGE_SETTING);
                break;
            case R.id.tv_tab_survey:
                mViewPager.setCurrentItem(PAGE_SURVEY);
                break;
            default:
                break;
        }
    }

问题

因为没有深入体验,相信在滑动监听,适配器中可以做很多事,慢慢发掘

特别鸣谢

灵魂导师- KingJA