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How to Save an ArrayList of Custom Objects to SharedPreferences with Gson – Android Studio Tutorial

admin by admin
February 26, 2020
in Công Nghệ
35
How to Save an ArrayList of Custom Objects to SharedPreferences with Gson – Android Studio Tutorial



In this video we learn, how we can save a List of custom Objects to Shared Preferences using Google’s GSON Library. For this purpose we will turn the ArrayList …

Nguồn:https://u-os.org/

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Comments 35

  1. Coding in Flow says:
    2 years ago

    * * *
    I added a link to the example code into the description box!
    * * *

    Reply
  2. Marin Gela says:
    2 years ago

    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.project/com.example.project.MainActivity}: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $

    Reply
  3. Frederik Munch-Hansen says:
    2 years ago

    Hi there. What to do – if my array of objects is a string array? Changing the arrayList to arrayString won't work :-(?

    Reply
  4. Dat Nguyen says:
    2 years ago

    please give me know the font you are using :p

    Reply
  5. Oskar Eriksson says:
    2 years ago

    you are so damn good at making videos!

    Reply
  6. HVC says:
    2 years ago

    hi so i did what you said on the video but when i click on the save button the app crashes, in the logcat it says

    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.reminded/com.example.reminded.SecondActivity}: java.lang.IllegalArgumentException: class android.widget.Button declares multiple JSON fields named mMinWidth

    Reply
  7. Pinky says:
    2 years ago

    Exactly what I was looking for. What a simple and elegant solution. Cheers!

    Reply
  8. PIkaDeath says:
    2 years ago

    If I press back button on an activity is onDestroy() called? if so i when its called i can use this to save data when my activity gets destroyed

    Reply
  9. Henrik Poulsen says:
    2 years ago

    Thank you very much for this excellent tutorial. Very simple, very effective 🙂

    Reply
  10. Dhaval Solanki says:
    2 years ago

    Thank you so much, this is exactly what I am looking for my app.

    Reply
  11. D. Refaeli says:
    2 years ago

    I'm not sure Shared Preferences should be used to store big amounts of data, but rather flags and the like. So if your data is too big, use a DB.

    Reply
  12. Ender Yaşlı says:
    2 years ago

    your tutorials are different from YouTube 👍🏻

    Reply
  13. Murad Alm says:
    2 years ago

    du bist wirklich toll!
    du schaffst das immer die Idee in so einer kurzen Zeti sehr deutlich zu erklären!
    Ich danke dir vielmals!

    nun habe ich eine kleiene Frage bitte: wie kann ich die Daten automatisch speichern (wenn die App gescloßen oder gekillt wird)?

    DANKE!!!!!

    Reply
  14. Jiwook Kim says:
    2 years ago

    Thank you so much!

    Reply
  15. Nguyen Nguyen says:
    2 years ago

    I made my small app for my study at uni, with very few instructions, and your tutorial helped me a lot. THANKS <3<3<3

    Reply
  16. Almas Shakirtkhanov says:
    2 years ago

    Thanks more!!!!

    Reply
  17. A 2K says:
    2 years ago

    Can you tell me how i can do it for 2d arrays ?

    Reply
  18. Anatole Couasnon says:
    2 years ago

    Thanks for this tutorial ! is someone know how to do the same thing out of an activity ? I have severals activity and i want to save datas from each one, so a class to save the datas would be easier than to do the same methods each time … Thanks for the time you will take to answer me

    Reply
  19. Roger says:
    2 years ago

    Thks alot .
    I also saw this in some blog, and i tried to use this example with favorite (button) for each item , save correct but in scrolling recyclerview there are som errors. If u have a video implementing this please link

    Reply
  20. cibo technologies says:
    2 years ago

    Thanks buddy, You did a great job. So saved my another day. Thanks

    Reply
  21. Robert Nino says:
    2 years ago

    Hello sir can you make a tutorial about arrays with activity in it. Exmple.
    Arr[0] = activity1.class
    And pass it to next activity

    Reply
  22. Siddharth Shakya says:
    2 years ago

    can you make a tutorial explaining recyclerview with AsyncTask with custom adapter

    Reply
  23. Siddharth Shakya says:
    2 years ago

    i was trying to use tinydb but failed but this

    Reply
  24. Siddharth Shakya says:
    2 years ago

    u have my respect 💕

    Reply
  25. Kavana Shettigar says:
    2 years ago

    Thanks a lot for this tutorial

    Reply
  26. chall1616 says:
    2 years ago

    Thank you for help !

    Reply
  27. Luis Alfredo Caballero says:
    2 years ago

    Tomatoes hahaha hello again, and thanks for the help.

    Reply
  28. umair bin ali says:
    2 years ago

    thank you.. you just did the best

    Reply
  29. Bolo Bolando says:
    2 years ago

    Good

    Reply
  30. Antti Kuisma says:
    2 years ago

    Hey, can you help me? loadData() crash my app… I tried to make it like when I add an item to the list, it also saves it at the same time.

    Reply
  31. Mücahit Alper Kaşlı says:
    2 years ago

    Thank you so much for clear explanation!
    I'm trying to figure out something,I hope you can help.
    Task:Get data of only all mLine2 strings which we saved.And send all data through bluetooth adaptor.Bluetooth app ready,saving all objects with your way also ready,now I just need to send mLine2 abjects one by one through bluetooth.
    Hope you can help 🙂

    Reply
  32. Jediah Games says:
    2 years ago

    Your videos are helping me so much, thank you!

    Reply
  33. Oomptz Fantasy & Ambient Theme Music says:
    2 years ago

    I am confused. How can it resolve variable mExampleList if you are not creating it in the beginning?

    Reply
  34. Pricop George says:
    2 years ago

    For me the load function isnt working gson.fromJson(json ,type) allways returns null

    Reply
  35. Thorin Schmidt says:
    2 years ago

    This was really great, thank you!

    Reply

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