Android unable to understand kotlin function-CodePudding

I am not very well versed with Kotlin and I am preferring Java over Kotlin while learning Android. But I am stuck at a piece of code which is as follows:

private fun getOutputDirectory(): File {
       val mediaDir = externalMediaDirs.firstOrNull()?.let {
           File(it, resources.getString(R.string.app_name)).apply { mkdirs() } }
       return if (mediaDir != null && mediaDir.exists())
           mediaDir else filesDir
}

The following function is called in onCreate method as var outputDirectory: File = getOutputDirectory();

Can you please help me convert the code into Java and in understanding it? Thank you.

CodePudding user response：

here is the process on how to convert Kotlin code to Java code. https://www.geeksforgeeks.org/how-to-convert-kotlin-code-to-java-code-in-android-studio/

But I suggest you to learn Kotlin as it is faster and preffered for Android app development.

CodePudding user response：

    private File getOutputDirectory() {
        File mediaDir = null;
        if (getExternalMediaDirs().size > 0) {
            mediaDir = new File(getExternalMediaDirs()[0], getResources().getString(R.string.app_name));
            mediaDir.mkdirs();
        }
        
        return if (mediaDir != null && mediaDir.exists())
         mediaDir
        else 
        filesDir
        
    }