简介

本文一共包含四种样例:

1. withFragment
   ViewPager结合Fragment.
2. withFragmentAsView
   ViewPager结合Fragment并封装成View.
3. withPagerAdapter
   ViewPager结合PagerAdapter.
4. withPagerAdapterAsView
   ViewPager结合PagerAdapter并封装成View.

效果图

部分源代码展示

完整源代码见git
ViewPager结合Fragment的部分源代码:

• MainActivity.kt

class MainActivity : AppCompatActivity() {

    private val pageTitles = arrayOf("Page 1", "Page 2", "Page 3", "Page 4", "Page 5")

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val fragments = getFragments()

        viewPager.adapter = object : FragmentStatePagerAdapter(supportFragmentManager) {
            override fun getCount(): Int {
                return fragments.size
            }

            override fun getItem(position: Int): Fragment {
                return fragments[position]
            }
        }
    }

    private fun getFragments(): ArrayList<Fragment> {
        val fragments = ArrayList<Fragment>()

        for (index in 0 until pageTitles.size) {
            val fragment = ViewPagerFragment.buildIntent(pageTitles[index])
            fragments.add(fragment)
        }

        return fragments
    }
}

• ViewPagerFragment.kt

class ViewPagerFragment : Fragment() {
    private var title: String? = ""

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        title = arguments?.getString(EXTRA_TITLE)
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val view = View.inflate(context, R.layout.fragment_view_pager, null)
        view.findViewById<TextView>(R.id.textView).text = title
        return view
    }

    companion object {
        private const val EXTRA_TITLE = "title"
        fun buildIntent(title: String): ViewPagerFragment {
            val fragment = ViewPagerFragment()
            var bundle = Bundle()
            bundle.putString(EXTRA_TITLE, title)
            fragment.arguments = bundle
            return fragment
        }
    }
}

完整源代码

https://github.com/cxyzy1/viewPagerDemos.git