Android ToolBar标题居中显示

class CenterTitleToolBar @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = R.attr.toolbarStyle
) : Toolbar(context, attrs, defStyleAttr) {
    override fun setTitle(title: CharSequence?) {
        addView(AppCompatTextView(context).apply {
            setTextColor(Color.BLACK)
            text = title
            isSingleLine = true
            gravity = Gravity.CENTER
            paint.isFakeBoldText = true
            layoutParams = Toolbar.LayoutParams(
                Toolbar.LayoutParams.WRAP_CONTENT,
                Toolbar.LayoutParams.WRAP_CONTENT
            ).apply {
                gravity = Gravity.CENTER
            }
        })
    }
}