Question

java在编程上等效于创建以下XML文件的内容：

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

我尝试这样做，但有些LinearLayout如何延伸至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

outerlayout.addView(parent);

Answer 2

您设置的LayoutParams适用于RelativeLayout，不适用于LinearLayout。我会打赌，LinearLayout使用MATCH_PARENT作为默认参数。当您将parent添加到Window或root ViewGroup时，您应该创建一组正确的LayoutParams并指定WRAP_CONTENT。

如何在java代码中使用wrap_cotent创建LinearLayout？

2 个答案: