Change Language in Android Programmatically

I found some interesting issue when developing an android app that supports multiple languages.

My approach was obsolete, now android has provide official API to change language programmatically https://developer.android.com/about/versions/13/features/app-languages use that instead

The sample playground can be found in here: https://github.com/wisnukurniawan/changelanguage

source

For the first try, I created a sample project to do playground. Inside the sample project, I made a function that set context locale based on device language.

Then I call the function in my activity like this.

Then I run and test. The result shows my text not translated all 🤐:

• Jelly Bean *worked
• Kitkat *worked
• Lollipop *worked
• Pie *not worked

On Android Pie, there is some text not translated. For a case when set text on TextView use string from applicationContext.

applicationContext.getString(R.string.my_string)

This issue, I simply fix it by calling LocalizationUtil.applyLanguage(newBase, “id”) in Application level. So my function will look like this.

Then I retested it and the issue was solved 🎉 🎉 🎉.

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