Brief Introduction to Android Layout

First of all, I will not talk about linearlayout, scrollview... and other layout S. I 'd like to briefly describe the landscape and landscape screens.

We may encounter some problems, such as the small Q unit converter I mentioned earlier. I don't know if anyone can try it. Let's try it. My main. XML is written in this way.

<? XML version = "1.0" encoding = "UTF-8"?> <Br/> <linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" <br/> Android: Id = "@ + ID/ad_container" <br/> Android: orientation = "vertical" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content"> <br/> <textview <br/> Android: id = "@ + ID/Item1" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> <edittext <br/> Android: Id = "@ + ID/edittext1" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> Android: Numeric = "decimal" Android: TEXT = ""/> <br/> <textview <br/> Android: Id = "@ + ID/item2" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> <edittext <br/> Android: id = "@ + ID/edittext2" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> Android: numeric = "decimal" <br/> Android: text = ""/> <br/> <textview <br/> Android: id = "@ + ID/item3" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> <edittext <br/> Android: Id = "@ + ID/edittext3" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> Android: Numeric = "decimal" <br/> Android: TEXT = ""/> <br/> <button <br/> Android: Id = "@ + ID/Change" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content" <br/> Android: TEXT = "Conversion"/> <br/> <spinner <br/> Android: Id = "@ + ID/choice" <br/> Android: layout_width = "fill_parent" <br/> Android: layout_height = "wrap_content"/> <br/> </linearlayout>

After writing the code, run the program and obtain the interface as follows:

Some people have said, it's okay, except for the ugly ones. Isn't that okay? Don't worry, just press Ctrl + F12 (it's enough for the real machine to go straight over ?) Found? Is there a problem?

 

At this time, we can see that the spinner component cannot be displayed very well. Of course, I can also click the mouse, finger? I'm not sure.

Many Android development books in China did not explain this knowledge. Finally, they found a solution in a very thin and powerful book: add a layout-land folder under the res folder (note that the suffix is-land) and add main. XML and then re-layout, that is, design a layout that can be normally displayed on a horizontal screen.

The new layout code is as follows:

<? Xml version = "1.0" encoding = "UTF-8"?> <Br/> <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" <br/> android: orientation = "vertical" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content"> <br/> <LinearLayout <br/> android: orientation = "horizontal" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content" <br/> <TextView <br/> android: id = "@ + id/item1" <br/> android: layout_width = "wrap_content" <br/> android: layout_height = "wrap_content" <br/> <EditText <br/> android: id = "@ + id/edittext1" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content" <br/> android: numeric = "decimal" <br/> </LinearLayout> </p> <LinearLayout <br/> android: orientation = "horizontal" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content"> <br/> <TextView <br/> android: id = "@ + id/item2" <br/> android: layout_width = "wrap_content" <br/> android: layout_height = "wrap_content" <br/> <EditText <br/> android: id = "@ + id/edittext2" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content" <br/> android: numeric = "decimal" <br/> </LinearLayout> <br/> <LinearLayout <br/> android: orientation = "horizontal" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content"> <br/> <TextView <br/> android: id = "@ + id/item3" <br/> android: layout_width = "wrap_content" <br/> android: layout_height = "wrap_content" <br/> <EditText <br/> android: id = "@ + id/edittext3" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content" <br/> android: numeric = "decimal" <br/> </LinearLayout> <br/> <LinearLayout <br/> android: orientation = "horizontal" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content"> <br/> <Button <br/> android: id = "@ + id/change" <br/> android: layout_width = "wrap_content" <br/> android: layout_height = "wrap_content" <br/> <Spinner <br/> android: id = "@ + id/Choice" <br/> android: layout_width = "fill_parent" <br/> android: layout_height = "wrap_content" <br/> </LinearLayout>

Let's run it again:

As we can see, now we can put down all the original components, and the interface is not very ugly. I did not add any text or images, so I still want to design it a little bit. Of course, I am just doing an example. There are many solutions. Please use your creativity! Remember that the suffix is-land ......