Kotlin四大组件中的broadcast广播

        fun newInstance(position:Int,image_id:Int,desc:String):BroadcastFragment {
            val bundle = Bundle()
            bundle.putInt("position",position)
            bundle.putInt("image_id",image_id)
            bundle.putString("desc",desc)
            val fragment = BroadcastFragment()
            fragment.arguments = bundle
            return fragment
        }

    <androidx.viewpager.widget.ViewPager
        android:id = "@+id/vp_content"
        android:layout_width="match_parent"
        android:layout_height="550dp">
        <androidx.viewpager.widget.PagerTabStrip
            android:id = "@+id/pts_tab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    </androidx.viewpager.widget.ViewPager>

class BroadcastPagerAdapter(fm:FragmentManager,private val GoodsList: MutableList<GoodsInfo>):FragmentStatePagerAdapter(fm) {
    override fun getCount(): Int {
        return goodsList.size
    }
    override fun getItem(position: Int): Fragment {
        return BroadcastFragment.newInstance(position,goodsList[position].pic,goodsList[position].desc)
    }
    override fun getPageTitle(position: Int): CharSequence? {
        return goodsList[position].name
    }
}

        pts_tab.setTextSize(TypedValue.COMPLEX_UNIT_SP,20f)
        vp_content.adapter = BroadcastPagerAdapter(supportFragmentManager,GoodsInfo.defaultList)
        vp_content.currentItem = 0

    private var bGChangeReceiver:BgChangeReceiver? = null
    private inner class BgChangeReceiver:BroadcastReceiver(){
        override fun onReceive(p0: Context?, p1: Intent?) {
        }
    }

    override fun onStart() {
        super.onStart()
        bgChangeReceiver = BgChangeReceiver()
        val filter = IntentFilter(BroadcastFragment.EVENT)
        activity?.reGISterReceiver(bgChangeReceiver,filter)
    }
    override fun onStop() {
        activity?.unregisterReceiver(bgChangeReceiver)
        super.onStop()
    }

        btn_cast.setOnClickListener {
            val intent = Intent(BroadcastFragment.EVENT)
            intent.putExtra("color",1)
            activity?.sendBroadcast(intent)
        }