1、实现效果，可点击或者滑动切换fragment
点击 滑动
实现方法：
1、创建三个fragment.kt
2、创建fragmentAdapter
class MyFragmentAdapter(fragmentManager: FragmentManager, private val fragmentList: List<Fragment>, private val titleList: List<String>, private val context: Context) : FragmentPagerAdapter(fragmentManager) {
override fun getItem(position: Int): Fragment {
return fragmentList[position]
}
override fun getCount(): Int {
return titleList.size
}
//注意！！！这里就是我们自定义的布局tab_item
fun getCustomView(position: Int): View {
val view = LayoutInflater.from(context).inflate(R.layout.tab_item, null)
val iv = view.findViewById(R.id.tab_iv) as ImageView
val tv = view.findViewById(R.id.tab_tv) as TextView
when (position) {
0 -> {
//drawable代码在文章最后贴出
iv.setImageDrawable(context.resources.getDrawable(R.drawable.home_icon_selector))
tv.text = "首页"
}
1 -> {
iv.setImageDrawable(context.resources.getDrawable(R.drawable.txl_icon_selector))
tv.text = "通讯录"
}
2 -> {
iv.setImageDrawable(context.resources.getDrawable(R.drawable.wd_icon_selector))
tv.text = "我的"
}
}
return view
}
}
3、ViewPager加载fragment
private lateinit var fragment3:BlankFragment3
private lateinit var fragment2:BlankFragment2
private lateinit var fragment:BlankFragment
private fun getdata() {
fragment = BlankFragment()
fragment2 = BlankFragment2()
fragment3 = BlankFragment3()
fragmentList!!.add(fragment)
fragmentList!!.add(fragment2)
fragmentList!!.add(fragment3)
titleList!!.add("首页")
titleList!!.add("通讯录")
titleList!!.add("我的")
activity_tablayout.setTabMode(TabLayout.MODE_FIXED)//不可以轮动
activity_tablayout.addTab(activity_tablayout.newTab().setText(titleList!!.get(0)))
activity_tablayout.addTab(activity_tablayout.newTab().setText(titleList!!.get(1)))
activity_tablayout.addTab(activity_tablayout.newTab().setText(titleList!!.get(2)))
activity_viewPager.adapter=MyFragmentAdapter(getSupportFragmentManager(), fragmentList!!, titleList!!,this)
activity_tablayout.setupWithViewPager(activity_viewPager)
for (i in 0..2) {
val tab = activity_tablayout.getTabAt(i)
//注意！！！这里就是添加我们自定义的布局
tab!!.setCustomView(adapter!!.getCustomView(i))
//这里是初始化时，默认item0被选中，setSelected（true）是为了给图片和文字设置选中效果，代码在文章最后贴出
if (i == 0) {
(tab!!.getCustomView()!!.findViewById(R.id.tab_iv) as ImageView).isSelected = true
(tab!!.getCustomView()!!.findViewById(R.id.tab_tv) as TextView).isSelected = true
}
}
}
demo云盘链接：
密码在线回复:QQ1085220040
kotlin工程demo链接：
