设置约束布局的高度是否正确？

Question

Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);
        int screenHeight = size.y;

        // get layout parameters for that view
        ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) askedQuestionCl.getLayoutParams();

        // change height of the params e.g. 480dp
        layoutParams.height = screenHeight;

        // initialize new parameters for my element
        askedQuestionCl.setLayoutParams(layoutParams);

这是以编程方式更新布局高度等于移动设备屏幕高度的正确方法吗？

Answer 1

  ConstraintLayout constrainLayout  = (ConstraintLayout)findViewById(R.id.clyt);
    ConstraintLayout.LayoutParams lparam = (ConstraintLayout.LayoutParams) constrainLayout.getLayoutParams();
    lparam .matchConstraintPercentHeight = (float) floatvalue add E.X0.4;
    constrainLayout.setLayoutParams(lparam);