以编程方式将边距设置为ConstraintLayout

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.constraintlayout.widget.ConstraintLayout
import androidx.constraintlayout.widget.ConstraintSet

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val constraintLayout = ConstraintLayout(this).apply {
            id = R.id.constraintLayout
            layoutParams = ConstraintLayout.LayoutParams(
                ConstraintLayout.LayoutParams.MATCH_PARENT,
                ConstraintLayout.LayoutParams.MATCH_PARENT
            )
        }

        val button = Button(this).apply {
            id = R.id.button
            text = "Click Me"
            layoutParams = ConstraintLayout.LayoutParams(
                ConstraintLayout.LayoutParams.WRAP_CONTENT,
                ConstraintLayout.LayoutParams.WRAP_CONTENT
            )
        }

        constraintLayout.addView(button)
        setContentView(constraintLayout)

        // 设置边距
        val constraintSet = ConstraintSet()
        constraintSet.clone(constraintLayout)
        constraintSet.connect(button.id, ConstraintSet.TOP, constraintLayout.id, ConstraintSet.TOP, 16)
        constraintSet.connect(button.id, ConstraintSet.START, constraintLayout.id, ConstraintSet.START, 16)
        constraintSet.applyTo(constraintLayout)
    }
}