How can I have more languages in an android app?

I want to set in my android app more languages : english, french, german,italian. That's mean that when I choose one of them in the app all the text from textviews, button..will appear in that language. How can I 开发者_运维技巧do that? Should I save the words from all app in a local SQlite database ? Can you provide me some examples? Thanks in advance.

All the techniques you need are covered in the Localization guide.

You can use the res/values/strings.xml in your ressource folder. After that you can create multiple folders, e.g. "values-en" for the english strings.xml or values-fr/strings.xml for french. Check this link.