如何以编程方式在视图上设置边距?

时间:2019-11-23 19:59:41

标签: java android

我是android开发的新手,我想为我的视图增加边距,但是我无法使其正常工作。

这是我的代码:

ConstraintLayout layout = new ConstraintLayout(this);

    final float scale = getResources().getDisplayMetrics().density;
    layout.setMinHeight((int)(100*scale));
    layout.setMaxHeight((int)(100*scale));

    CircleImageView icon = new CircleImageView(this);
    icon.setImageResource(image);
    icon.setBorderWidth(3);

    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams((int)(90*scale), (int)(90*scale));
    icon.setLayoutParams(layoutParams);

    ViewGroup.MarginLayoutParams marginParams = new ViewGroup.MarginLayoutParams(icon.getLayoutParams());
    marginParams.setMargins(100, 0, 0, 0);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(marginParams);
    icon.setLayoutParams(params);

    layout.addView(icon);

为什么这不起作用?谢谢!

2 个答案:

答案 0 :(得分:1)

您应该这样做:

LayoutParams param = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT);
param.setMargins(left, top, right, bottom);
view.setLayoutParams(param);

答案 1 :(得分:0)

创建图标后,首先应为其生成一个ID:

icon.setId(View.generateViewId());

然后,删除setMargins行并将这些行添加到layout.addView(icon)下:

ConstraintSet set = new ConstraintSet();
set.clone(layout);

set.constrainWidth(icon.getId(), (int)(90*scale));
set.constrainHeight(icon.getId(), (int)(90*scale));

set.connect(icon.getId(), ConstraintSet.TOP, ConstraintSet.PARENT_ID, ConstraintSet.TOP, 0);
set.connect(icon.getId(), ConstraintSet.START, ConstraintSet.PARENT_ID, ConstraintSet.START, 100);

set.applyTo(layout);

我还没有测试过,但这应该是朝着正确方向迈出的一步。

让我知道怎么回事。