Saving byte array using SharedPreferences

java android bytearray sharedpreferences
user2453055 picture user2453055 · Oct 24, 2013 · Viewed 22.3k times · Source

So I have a byte [] array which I have created in my android app. I want to use SharedPreferences from android to store it and retrieve it back again when I start my app. How can I do that ?

Answer

Daniel Landau picture Daniel Landau · Feb 18, 2014

You can save a byte array in SharedPreferences by using android.util.Base64.

For saving:

String saveThis = Base64.encodeToString(array, Base64.DEFAULT);

For loading:

byte[] array = Base64.decode(stringFromSharedPrefs, Base64.DEFAULT);

Related questions

How can I print an image on a Bluetooth printer in Android?

I have to print some data on thermal bluetooth printer, I'm doing with this: String message="abcdef any message 12345"; byte[] send; send = message.getBytes(); mService.write(send); It works well for text, but not for images. I think I need …

Read More
Android: Bitmap to Byte Array and back: SkImageDecoder::Factory returned null

The goal is to convert a Bitmap to a byte [], pass it between activities in a Bundle of data, then reconvert it back to a Bitmap at a later stage for display in an Imageview. The issue is that whenever …

Read More
Printing an Image using a Bluetooth Thermal Printer From an Android App?

I have been trying to get a print of an Image but I have not been successful so far.The printer is a locally manufactured 2" thermal printer having a printing resolution of 8dots/mm, 384dots/line, 203 dpi. The printer is …

Read More