两个联动的可扩展收起的textView的简单实现

class FirstActivity : AppCompatActivity(), View.OnClickListener {
    

    private lateinit var binding: FirstLayoutBinding
    private var isExpandTV_1 = false
    private var isExpandTV_2 = true

    override fun onCreate(savedInstanceState: Bundle?) {
    
        super.onCreate(savedInstanceState)
        binding = FirstLayoutBinding.inflate(layoutInflater)
        setContentView(binding.root)
// tv_expand.maxLines = 10
        button.setOnClickListener(this)
        button2.setOnClickListener(this)
    }

    fun showTv1Expand() {
    
        tv_expand.maxLines = 10
        //imageView 1
    }

    fun showTv1Collapse() {
    
        tv_expand.maxLines = 0
        // imageView 2
    }

    fun showTv2Expand() {
    
        tv_expand2.maxLines = 10
    }

    fun showTv2Collapse() {
    
        tv_expand2.maxLines = 0
        // imageView 2
    }


    override fun onClick(v: View?) {
    
        when (v) {
    
            button -> {
    
                if (isExpandTV_2) {
    
                    showTv2Collapse()
                    isExpandTV_2 = false
                }
                if (isExpandTV_1) {
    
                    showTv1Collapse()
                    isExpandTV_1 = false
                } else {
    
                    showTv1Expand()
                    isExpandTV_1 = true
                }
            }
            button2 -> {
    
                if (isExpandTV_1) {
    
                    showTv1Collapse()
                    isExpandTV_1 = false
                }
                if (isExpandTV_2) {
    
                    showTv2Collapse()
                    isExpandTV_2 = false
                } else {
    
                    showTv2Expand()
                    isExpandTV_2 = true
                }
            }
        }
    }
}