如何以编程方式修改约束布局? [英] how to MODIFY a constraint layout programmatically?

问题描述

我的视图如下:

 <org.rayanmehr.atlas.shared.customview.CustomTextView
    android:id="@+id/tvDownVoteCount"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="6dp"
    app:layout_constraintVertical_bias="0"
    app:layout_constraintTop_toBottomOf="@+id/anchorHelper"
    app:layout_constraintLeft_toRightOf="@+id/tvDownVoteIcon"
    app:layout_constraintBottom_toBottomOf="@+id/imgComment"
    />

我如何通过编程方式修改app:layout_constraintVertical_bias或任何其他约束属性的值，而又没有在我的活动中再次重新设置整个属性集?

how can i modify the value of app:layout_constraintVertical_bias or any other constraint property programmatically without having top set the whole set of the properties again in my activity ?

推荐答案

我刚刚在此处，您可以使用ConstraintSet来实现此目标，如下所示:

I just found the answer in here and you can use ConstraintSet to achieve this like below:

ConstraintSet constraintSet = new ConstraintSet();
constraintSet.clone(context, R.id.activity_constraint);
//for example lets change the vertical bias of tvDownVoteIcon
float biasedValue = 0.2f;
constraintSet.setVerticalBias(R.id.tvDownVoteIcon, biasedValue);
//you can do any other modification and then apply
constraintSet.applyTo( (ConstraintLayout) findViewById(R.id.activity_constraint));

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