在Android中支持不同的屏幕尺寸

Question

I am getting very confused on how to support all different Android screen sizes. I have already checked this answer , this site , the official documentations and many other answers but still I am confused so please don't mark this as Duplicate .

I already created layout-sw120dp, layout-sw160dp, layout-sw240dp, layout-sw320dp, layout-sw480dp (I only need to support up to 6 inches so I don't create layout-sw600dp ).

What do I have to do is just have one layout and just copy it in each different folder so Android will do the selection on its own or I also need to change values in each layout?

Answer 1

What do I have to do is just have one layout and just copy it in each different folder or I also need to change values in each layout?

You start by deleting the layout-sw120dp , layout-sw160dp , layout-sw240dp , layout-sw320dp , and layout-sw480dp directories that you created. Or, at least, ignore them for now.

You then start implementing your UI, putting layout resources in res/layout/ .

Then, for those layouts that need to be different in certain scenarios, you then create a directory representing the size when you want a different layout. Copy the layout from res/layout/ into the new directory, and then modify that copy to reflect whatever changes you want.

In other words, one copy of every layout is in res/layout/ , and you override where needed with additional, modified copies in specific directories where you need the UI to change.

Answer 2

This is an answer that's been an issue from old ages and for which you'll see lot many answers but which is not a one fit all type still. What I did come up with though when faced with the same issue was to use PercentRelativeLayout . This is a relatively new feature that was started from Android support version 23.0 (android sdk manager), and one of the big game changers according to me, since it allowed developers to specify their blocks relative to the layout size Percentage-wise. And since it is in terms of percent, this fits all screen sizes with varying dimensions, but while maintaining the ratio .

Ofcourse this method involves some trial and error and a lot of experimenting , but I found this method to be the easiest to implement and which took out the headache of maintaining the dimensions for various screen sizes.

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Few tutorials to get you started :

https://www.tutorialspoint.com/android/android_relative_layout.htm https://guides.codepath.com/android/Constructing-View-Layouts

Answer 3

If you want to use the same layout for each and every screen density, you don't need to create different folders. Use just one simply called "layout" and the system will interpret it for every density. However, this could lead to strange layouts on certain physical devices depending on their screen size and density... Another point you have to be aware of, if your application supports orientation changes, is that you have to design layouts for portrait and lanscape orientations. This is done by duplicating a folder used for a density and add "-port" or "-land" to inform the systen which one must be used according to the actual orientation of the device your app is currently running on. If you want to precisely define your app look and feel, you have to customize your layout for each density. And if you use bitmaps, you will have to customize them either (for example, your app icon should be defined with different sizes to keep a good looking for each screen density). Just as for the layout, you have to create "drawable-..." folders to contain the corresponding versions of your bitmaps.