Android：BottomNavigationView相关

菜鸡记录帖：

和ViewPager2联动

fun BottomNavigationView.setUpWithViewPager2(viewPager2: ViewPager2) {
    val map = mutableMapOf()
    if (this.menu.size != viewPager2.adapter?.itemCount) error("viewpager2数量需要和BottomNavigationView数量相同")
    this.menu.forEachIndexed { index, item ->
        map[item] = index
    }

    viewPager2.registeronPageChangeCallback(object : ViewPager2.onPageChangeCallback() {
        override fun onPageSelected(position: Int) {
            super.onPageSelected(position)
            this@setUpWithViewPager2.selectedItemId =
                this@setUpWithViewPager2.menu.getItem(position).itemId
        }
    })

    this.setonNavigationItemSelectedListener {
        val index = map[it] ?: error("asdasd")
        Log.d("TAG", "setUpWithViewPager2: index = $index")
        viewPager2.setCurrentItem(index, true)
        return@setonNavigationItemSelectedListener true
    }
}

BottomNavigationView选中效果修改和水波纹修改

1.新建color文件夹

1）选中icon：itemIconTint

2）选中字体颜色：itemTextColor

3）水波纹颜色：itemRippleColor