ConstraintLayout:如何以编程方式将屏幕划分为屏幕高度的两个相等部分

ConstraintLayout constraintLayout = findViewById(R.id.constraintLayout);

// 创建上方视图
View view1 = new View(this);
view1.setId(View.generateViewId());
constraintLayout.addView(view1);

// 创建下方视图
View view2 = new View(this);
view2.setId(View.generateViewId());
constraintLayout.addView(view2);

// 设置上方视图的约束
ConstraintSet set = new ConstraintSet();
set.clone(constraintLayout);

set.connect(view1.getId(), ConstraintSet.TOP, ConstraintSet.PARENT_ID, ConstraintSet.TOP);
set.connect(view1.getId(), ConstraintSet.BOTTOM, ConstraintSet.PARENT_ID, ConstraintSet.BOTTOM);
set.constrainHeight(view1.getId(), ConstraintSet.MATCH_CONSTRAINT);
set.constrainWidth(view1.getId(), ConstraintSet.MATCH_CONSTRAINT);
set.setVerticalBias(view1.getId(), 0f);

// 设置下方视图的约束
set.connect(view2.getId(), ConstraintSet.TOP, view1.getId(), ConstraintSet.BOTTOM);
set.connect(view2.getId(), ConstraintSet.BOTTOM, ConstraintSet.PARENT_ID, ConstraintSet.BOTTOM);
set.constrainHeight(view2.getId(), ConstraintSet.MATCH_CONSTRAINT);
set.constrainWidth(view2.getId(), ConstraintSet.MATCH_CONSTRAINT);
set.setVerticalBias(view2.getId(), 1f);

set.applyTo(constraintLayout);