在安卓自定义ViewGroup上调用setMargins()的方法如下:
public class CustomViewGroup extends ViewGroup {
// 构造函数
public CustomViewGroup(Context context) {
super(context);
}
public CustomViewGroup(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomViewGroup(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
// 重写onLayout方法
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
// 在这里设置子View的位置
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View childView = getChildAt(i);
// 设置子View的位置
childView.layout(left, top, right, bottom);
}
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// 测量子View的大小
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View childView = getChildAt(i);
// 测量子View的大小
measureChild(childView, widthMeasureSpec, heightMeasureSpec);
}
// 设置自定义ViewGroup的大小
setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec));
}
// 创建自定义ViewGroup的实例
CustomViewGroup customViewGroup = new CustomViewGroup(context);
// 创建子View
View childView = new View(context);
// 设置子View的布局参数
CustomViewGroup.LayoutParams layoutParams = new CustomViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
// 设置子View的边距
layoutParams.setMargins(leftMargin, topMargin, rightMargin, bottomMargin);
// 添加子View到自定义ViewGroup中
customViewGroup.addView(childView, layoutParams);
通过以上步骤,你可以在安卓自定义ViewGroup上调用setMargins()方法来设置子View的边距。请注意,这里的setMargins()方法是LayoutParams类的方法,用于设置子View的边距。
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