Android自定义view实现标签栏功能(只支持固定两个标签)

实现效果图

主要代码

完整源代码

class tabview(context: context, attributeset: attributeset?) : linearlayout(context, attributeset) {
 private lateinit var firsttab: view
 private lateinit var secondtab: view
 private val firsttabindex = 0
 private val secondtabindex = 1
 private var selectedtab = firsttabindex
 private val textsize = 20f
 private val bottomsplitcolor = "#fa871e"
 private val centersplitcolor = "#666666"
 private val bottomsplitwidth = 50
 private val bottomsplitheight = 4
 private val centersplitwidth = 1
 private val centersplitheight = 40
 private lateinit var monswitchlistener: onswitchlistener
 fun inittabs(
  firsttabtext: string,
  secondtabtext: string,
  selectedindex: int,
  onswitchlistener: onswitchlistener
 ) {
  monswitchlistener = onswitchlistener
  setorientation()
  firsttab = addtab(firsttabtext)
  addcentersplit()
  secondtab = addtab(secondtabtext)
  selecttab(selectedindex)
  setonclicklistener { switchtab() }
 }
 interface onswitchlistener {
  fun onswitched(selectedindex: int)
 }
 private fun selecttab(tabindex: int) {
  if (tabindex == firsttabindex) {
   firsttab.visibility = view.visible
   secondtab.visibility = view.invisible
  } else {
   firsttab.visibility = view.invisible
   secondtab.visibility = view.visible
  }
  selectedtab = tabindex
 }
 private fun switchtab() {
  if (selectedtab == firsttabindex) {
   selecttab(secondtabindex)
  } else {
   selecttab(firsttabindex)
  }
  monswitchlistener.onswitched(selectedtab)
 }
 private fun setorientation() {
  orientation = horizontal
 }
 private fun getbottomsplitview(): view {
  val view = view(context)
  view.setbackgroundcolor(color.parsecolor(bottomsplitcolor))
  return view
 }
 private fun getbottomsplitlayoutparams(): layoutparams {
  val layoutparams = layoutparams(bottomsplitwidth, bottomsplitheight)
  layoutparams.setmargins(3, 3, 3, 3)
  layoutparams.gravity = gravity.center_horizontal
  return layoutparams
 }
 private fun addcentersplit() {
  val view = view(context)
  view.setbackgroundcolor(color.parsecolor(centersplitcolor))
  addview(view, getcentersplitlayoutparams())
 }
 private fun getcentersplitlayoutparams(): layoutparams {
  val layoutparams = layoutparams(centersplitwidth, centersplitheight)
  layoutparams.setmargins(3, 0, 3, 0)
  layoutparams.gravity = gravity.center_vertical
  return layoutparams
 }
 private fun addtab(text: string): view {
  var linearlayout = linearlayout(context)
  linearlayout.orientation = vertical
  val textview = gettextview(text)
  linearlayout.addview(
   textview,
   layoutparams(layoutparams.wrap_content, layoutparams.wrap_content)
  )
  val splitview = getbottomsplitview()
  linearlayout.addview(splitview, getbottomsplitlayoutparams())
  addview(linearlayout, layoutparams(layoutparams.wrap_content, layoutparams.wrap_content))
  return splitview
 }
 private fun gettextview(text: string): textview {
  val textview = textview(context)
  textview.text = text
  textview.setpadding(10, 10, 10, 10)
  textview.textsize = textsize
  return textview
 }
}

https://gitee.com/cxyzy1/custtabview

总结

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