java - 如何在 java 代码中使用 wrap_cotent 创建一个 LinearLayout？

Question

什么是 java 在编程上等效于创建以下XML文件：

<LinearLayout
   android:layout_width="wrap_content"
   android:layout_height="wrap_content">
     <RelativeLayout />
</LinearLayout>

我尝试这样做，但有些LinearLayout如何MATCH_PARENT

// child is the RelativeLayout in the above example:
LinearLayout parent = new LinearLayout(getContext());
LinearLayout.LayoutParams childLayoutParams = new LinearLayout.LayoutParams(
  LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
parent.addView(child, -1, childLayoutParams);

Answer 1

试试这个

LinearLayout parent = new LinearLayout(getContext());
LayoutParams parentLayoutParams = new LinearLayout.LayoutParams(
        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
parent.setLayoutParams(parentLayoutParams);

然后将其添加到屏幕上

outerlayout.addView(parent);

Answer 2

LayoutParams您设置的是，RelativeLayout而不是LinearLayout。我敢打赌，它被用作默认参数LinearLayout。MATCH_PARENT当您添加parent到Window或 根ViewGroup时，您应该创建一个适当的集合LayoutParams并指定WRAP_CONTENT.