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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