Base64 support for different API levels

Question

In my Android app

build.gradle

android {     compileSdkVersion 27     defaultConfig {         minSdkVersion 16         targetSdkVersion 27         ...         }     .... } 

Kotlin code

val data = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {     Base64.getDecoder().decode(str) } else {     Base64.decode(str, Base64.DEFAULT) // Unresolved reference: decode } 

Obviously, I got compilation error, when using Base64 variant prior to API 24.

But how can I support all the API levels and use Base64 as before 24, as after?

Answer 1

Use android.util.Base64 will resolve your problem its available from API 8

data = android.util.Base64.decode(str, android.util.Base64.DEFAULT); 

Example usage:

Log.i(TAG, "data: " + new String(data)); 

Answer 2

fun String.toBase64(): String {     return String(         android.util.Base64.encode(this.toByteArray(), android.util.Base64.DEFAULT),         StandardCharsets.UTF_8     ) }   fun String.fromBase64(): String {     return String(         android.util.Base64.decode(this, android.util.Base64.DEFAULT),         StandardCharsets.UTF_8     ) }