Android 如何将ImageView动态对齐到约束布局的中心？

我正在尝试将图像视图与约束布局的中心对齐。我写下面的代码，但它不工作

代码

int size = 150;
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(size, size);

layoutParams.bottomToBottom = ConstraintSet.PARENT_ID;
layoutParams.endToEnd = ConstraintSet.PARENT_ID;
layoutParams.startToStart = ConstraintSet.PARENT_ID;
layoutParams.topToTop = ConstraintSet.PARENT_ID;

circleImageView.setLayoutParams(layoutParams);

尝试此方法，使用ConstraintSet可以轻松地以编程方式将视图渲染到ConstraintLayout的中心

在代码中：

ConstraintSet.PARENT_ID

不是父约束布局的真实ID。您需要将其更改为：

R.id.myLayout

其中myLayout是您在*.xml文件中键入的内容：

android:id="@+id/myLayout"

这应该起作用：

int size = 150;
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(size, size);

layoutParams.topToTop = R.id.myLayout;
layoutParams.bottomToBottom = R.id.myLayout;
layoutParams.leftToLeft = R.id.myLayout;
layoutParams.rightToRight = R.id.myLayout;
layoutParams.verticalBias = (float) 0.95;
layoutParams.horizontalBias = (float) 0.5;

circleImageView.setLayoutParams(layoutParams);

---

ConstraintLayout cLayout=findViewById（R.id.main_布局）

---

您可以共享您的布局吗？创建新布局时，需要克隆以前的constraintlayout.layoutparams。还要确保imageview的高度和宽度为0dp

int size = 150;
ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(size, size);

layoutParams.topToTop = R.id.myLayout;
layoutParams.bottomToBottom = R.id.myLayout;
layoutParams.leftToLeft = R.id.myLayout;
layoutParams.rightToRight = R.id.myLayout;
layoutParams.verticalBias = (float) 0.95;
layoutParams.horizontalBias = (float) 0.5;

circleImageView.setLayoutParams(layoutParams);

        TextView ev = new TextView(getApplicationContext());
        ev.setText(getString(R.string.not_found_name));
        ev.setTextSize(50);
        ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams( ConstraintLayout.LayoutParams.WRAP_CONTENT,
                ConstraintLayout.LayoutParams.WRAP_CONTENT);

        layoutParams.bottomToBottom = ConstraintSet.PARENT_ID;
        layoutParams.endToEnd = ConstraintSet.PARENT_ID;
        layoutParams.startToStart = ConstraintSet.PARENT_ID;
        layoutParams.topToTop = ConstraintSet.PARENT_ID;

        ev.setLayoutParams(layoutParams);
        cLayout.addView(ev);