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@@ -42,7 +42,9 @@ class CustomNavBar @JvmOverloads constructor(
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context: Context, attrs: AttributeSet? = null, defStyle: Int = 0
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) : LinearLayout(context, attrs, defStyle) {
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private val logger: Logger = LoggerFactory.getLogger(this::class.java)
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-
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+ private companion object {
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+ const val NO_SELECTION = -1
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+ }
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@SuppressLint("RestrictedApi")
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private val menuBuilder = MenuBuilder(context)
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val menu: Menu get() = menuBuilder
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@@ -197,51 +199,48 @@ class CustomNavBar @JvmOverloads constructor(
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container.getChildAt(c).refreshDrawableState() // ★ 子也刷一下
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}
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}
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- if (length > 0) selectIndex(selectedIdx.coerceIn(0, length - 1))
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+ if (length > 0) {
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+ if (selectedIdx in 0 until length) {
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+ selectIndex(selectedIdx)
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+ } else {
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+ selectIndex(NO_SELECTION) // 全部不选
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+ }
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+ }
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}
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private fun selectIndex(idx: Int) {
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- if (idx == selectedIdx) {
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- invalidate(); return
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- }
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selectedIdx = idx
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+
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for (i in 0 until childCount) {
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- val v = getChildAt(i)
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- v.isSelected = (i == selectedIdx)
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- v.refreshDrawableState() // ★
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- for (c in 0 until (v as ViewGroup).childCount) {
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- val childView = v.getChildAt(c)
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- when (childView) {
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+ val container = getChildAt(i) as ViewGroup
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+ val selected = (selectedIdx >= 0 && i == selectedIdx)
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+
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+ container.isSelected = selected
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+ container.refreshDrawableState()
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+
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+ for (c in 0 until container.childCount) {
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+ val child = container.getChildAt(c)
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+ when (child) {
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is ImageView -> {
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- if (v.isSelected) {
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- childView.layoutParams = childView.layoutParams.apply {
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- width = iconSelectedSize.toInt()
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- height = iconSelectedSize.toInt()
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- }
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- } else {
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- childView.layoutParams = childView.layoutParams.apply {
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- width = iconSize.toInt()
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- height = iconSize.toInt()
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- }
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+ child.layoutParams = child.layoutParams.apply {
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+ val s = if (selected) iconSelectedSize else iconSize
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+ width = s; height = s
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}
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}
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-
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is TextView -> {
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- if (v.isSelected) {
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- childView.setTextSize(
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- TypedValue.COMPLEX_UNIT_PX, textSelectedSizePx.toFloat()
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- )
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- } else {
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- childView.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSizePx.toFloat())
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- }
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+ child.setTextSize(
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+ TypedValue.COMPLEX_UNIT_PX,
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+ (if (selected) textSelectedSizePx else textSizePx).toFloat()
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+ )
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}
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}
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- childView.refreshDrawableState() // ★
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+ child.refreshDrawableState()
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}
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}
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invalidate()
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}
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+
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@SuppressLint("RestrictedApi")
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override fun onDraw(canvas: Canvas) {
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// 菜单发生变化（比如运行时 add/remove）时自动重建
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@@ -256,17 +255,29 @@ class CustomNavBar @JvmOverloads constructor(
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}
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var selectedItemId: Int
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- @SuppressLint("RestrictedApi") get() = menuBuilder.getItemOrNull(selectedIdx)?.itemId
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- ?: View.NO_ID
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- @SuppressLint("RestrictedApi") set(id) {
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- if (isEmpty() && menuBuilder.size() > 0) buildItems() // ★
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- val idx =
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- (0 until menuBuilder.size()).firstOrNull { menuBuilder.getItem(it).itemId == id }
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- ?: return
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+ @SuppressLint("RestrictedApi")
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+ get() = if (selectedIdx in 0 until menuBuilder.size())
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+ menuBuilder.getItem(selectedIdx).itemId
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+ else View.NO_ID
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+ @SuppressLint("RestrictedApi")
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+ set(id) {
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+ if (isEmpty() && menuBuilder.size() > 0) buildItems()
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+
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+ // ★ 支持“清空选中”
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+ if (id == View.NO_ID) {
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+ selectIndex(NO_SELECTION)
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+ return
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+ }
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+
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+ val idx = (0 until menuBuilder.size())
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+ .firstOrNull { menuBuilder.getItem(it).itemId == id }
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+ ?: return
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+
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selectIndex(idx)
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onItemSelected?.invoke(menuBuilder.getItem(idx))
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}
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+
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// —— 工具 —— //
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private fun dp(dp: Float): Int = AutoSizeUtils.dp2px(context, dp)
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private fun sp(sp: Float): Int = AutoSizeUtils.sp2px(context, sp)
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@@ -286,4 +297,11 @@ class CustomNavBar @JvmOverloads constructor(
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@SuppressLint("RestrictedApi")
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private fun MenuBuilder.getItemOrNull(i: Int): MenuItem? =
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if (i in 0 until size()) getItem(i) else null
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+
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+ /**
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+ * 取消选择
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+ */
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+ fun clearSelected() {
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+ selectIndex(NO_SELECTION) // 直接调 index 逻辑，别再走 selectedItemId
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+ }
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}
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