{"id":4561,"uri":"rw://betamax/collections/130","name":"Saving Data on Android","description":"

Learn various ways to persist data in your app: SharedPreferences, saving data to files, using SQLite, and using the Room library from Google.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:29.157Z","updated_at":"2020-06-03T13:30:15.657Z","duration":7617,"difficulty":"beginner","content_type":"collection","platform_id":17,"language_id":1,"editor_id":10,"group_id":null,"ordinal":null,"body":null,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":967.09375,"labelled_as_new":false,"display_attributes":{"concepts_covered":"","intended_audience":""},"average_rating":"4.6","rating_count":5,"professional":false,"to_param":"4561-saving-data-on-android","released_versions_data":[{"id":4561,"url":"4561-saving-data-on-android","description":"Kotlin 1.2, Android 4.4+, Studio 3.0.1"}],"groups":[{"id":139,"uri":"rw://betamax/parts/74","content_id":4561,"ordinal":0,"name":"SharedPreferences","description":null,"created_at":"2018-05-03T17:09:30.233Z","updated_at":"2018-05-03T17:09:30.280Z","contents":[{"id":4586,"uri":"rw://betamax/videos/1498","name":"Introduction","description":"

Find out what's covered in our Saving Data on Android video tutorial series: SharedPrefences, saving to files, SQLite, and Room.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":true,"created_at":"2018-05-03T17:09:30.292Z","updated_at":"2020-06-03T10:30:13.804Z","duration":157,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":1,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":3519.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Introduction","duration_in_time":"2:37","identifier":"1498","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1498/e5d9339e-c577-4671-a6e7-35120ea5ac2c.png","released":true,"has_materials_url":false,"permission_tags":[]},{"id":4591,"uri":"rw://betamax/videos/1515","name":"The Starter App","description":"

Download the starter app, build it in Android Studio, and review the existing app code. Review the Model-View-Presenter (MVP) and Repository patterns.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.324Z","updated_at":"2020-06-03T09:30:12.222Z","duration":356,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":2,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":2317.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · The Starter App","duration_in_time":"5:56","identifier":"1515","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1515/efded4aa-a14e-43cf-9113-71c96e745e34.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4593,"uri":"rw://betamax/videos/1516","name":"Getting SharedPrefs","description":"

Learn about use cases for SharedPreferences, see how to access the default SharedPreferences, and also see how to setup a custom SharedPreferences.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.350Z","updated_at":"2020-06-03T07:30:11.794Z","duration":191,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":3,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1337.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Getting SharedPrefs","duration_in_time":"3:11","identifier":"1516","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1516/75b023eb-f7f5-49d4-84f0-c2277188b53f.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4597,"uri":"rw://betamax/videos/1517","name":"Reading and Writing SharedPrefs","description":"

Learn how to save data into SharedPreferences, and how to read the data back in.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.374Z","updated_at":"2020-06-03T10:30:14.227Z","duration":268,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":4,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1088.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Reading and Writing SharedPrefs","duration_in_time":"4:28","identifier":"1517","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1517/a392e5c2-7f0e-4895-a2a7-c5b7b0da2f54.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4600,"uri":"rw://betamax/videos/1518","name":"Challenge: Reading and Writing SharedPrefs","description":"

Practice what you've learned so far to save data into SharedPreferences and then read the data back in.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.394Z","updated_at":"2020-06-03T08:30:12.404Z","duration":242,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":5,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":912.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Challenge: Reading and Writing SharedPrefs","duration_in_time":"4:02","identifier":"1518","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1518/5d082fe7-72a9-4b48-b47e-607ca1edd231.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4604,"uri":"rw://betamax/videos/1519","name":"SharedPrefs Repository","description":"

Switch from saving the app data from an in-memory repository into a repository backed by SharedPreferences. Learn about the limitations of SharedPreferences.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.421Z","updated_at":"2020-06-03T08:30:12.482Z","duration":243,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":6,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":937.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · SharedPrefs Repository","duration_in_time":"4:03","identifier":"1519","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1519/e98aa027-d238-4a25-b8cb-7e27d42948e1.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4607,"uri":"rw://betamax/videos/1520","name":"Challenge: SharedPrefs Repository","description":"

Practice some more with the Repository pattern by deleting data from the SharedPreferences repository.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.447Z","updated_at":"2020-06-03T08:30:13.134Z","duration":102,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":7,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":863.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Challenge: SharedPrefs Repository","duration_in_time":"1:42","identifier":"1520","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1520/12ceabbd-e332-462f-b11d-d27d3cb6f352.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4610,"uri":"rw://betamax/videos/1521","name":"Conclusion","description":"

Let's review what you've covered on SharedPreferences and the Repository pattern in this first part on Saving Data on Android, and then discuss what's next.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.472Z","updated_at":"2020-06-03T08:30:14.656Z","duration":53,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":139,"ordinal":8,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":679.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Conclusion","duration_in_time":"0:53","identifier":"1521","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1521/b6b687e4-26a7-475d-ae3d-cd4accd898d2.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]}]},{"id":144,"uri":"rw://betamax/parts/75","content_id":4561,"ordinal":1,"name":"Saving to Files","description":null,"created_at":"2018-05-03T17:09:30.534Z","updated_at":"2018-05-03T17:09:30.543Z","contents":[{"id":4625,"uri":"rw://betamax/videos/1522","name":"Introduction","description":"

We'll survey various issues with writing files, including internal vs. external storage, permissions, thread concerns, and checking for disk space.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.556Z","updated_at":"2020-06-03T08:30:14.764Z","duration":68,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":9,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":966.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Introduction","duration_in_time":"1:08","identifier":"1522","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1522/362a515f-7e30-46d3-a514-c5ba4648aee8.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]},{"id":4629,"uri":"rw://betamax/videos/1523","name":"Writing to Internal Storage","description":"

Learn how to write files to internal storage. You'll use Gson to convert the app data and peer into the Android file system using Device File Explorer.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.583Z","updated_at":"2020-06-03T08:30:14.894Z","duration":468,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":10,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1090.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Writing to Internal Storage","duration_in_time":"7:48","identifier":"1523","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1523/b9960da1-b99c-4079-a231-1455f13cea4b.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4633,"uri":"rw://betamax/videos/1524","name":"Reading from Internal Storage","description":"

See how to read files from internal storage using the Java SDK FileInputStream and BufferedReader classes.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.605Z","updated_at":"2020-06-03T09:30:12.674Z","duration":293,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":11,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":797.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Reading from Internal Storage","duration_in_time":"4:53","identifier":"1524","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1524/17929ea2-e817-404a-b0e1-1d21e2e28e89.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4635,"uri":"rw://betamax/videos/1525","name":"Challenge: Internal Storage","description":"

Practice what you've learned about saving to internal storage by safeguarding your app against read and write errors.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.631Z","updated_at":"2020-06-03T09:30:12.729Z","duration":74,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":12,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":670.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Challenge: Internal Storage","duration_in_time":"1:14","identifier":"1525","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1525/5491cc27-99de-4c4d-82b6-492555f2a66a.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4637,"uri":"rw://betamax/videos/1526","name":"External Storage","description":"

Switch from using internal storage to external storage for saving the app data, and see how to use adb to pull files from a device.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.654Z","updated_at":"2020-06-03T10:30:15.024Z","duration":180,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":13,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":701.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · External Storage","duration_in_time":"3:00","identifier":"1526","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1526/a11af905-d69d-4ac6-b526-4fb70291d82e.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4640,"uri":"rw://betamax/videos/1527","name":"Deleting Files","description":"

Update the FileRepository to delete files, using some of the helper functions you've already developed.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.677Z","updated_at":"2020-06-03T09:30:12.850Z","duration":78,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":14,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":623.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Deleting Files","duration_in_time":"1:18","identifier":"1527","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1527/15481d38-a316-4005-bca2-0bf241a9295d.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4644,"uri":"rw://betamax/videos/1528","name":"Challenge: Deleting Files","description":"

Finish the use of the FileRepository for saving app data by practicing what you've learned to delete files.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.704Z","updated_at":"2020-06-03T09:30:12.922Z","duration":114,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":15,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":629.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Challenge: Deleting Files","duration_in_time":"1:54","identifier":"1528","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1528/c8c288d2-6d78-471c-a3b8-4281ef3e8245.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4646,"uri":"rw://betamax/videos/1529","name":"Conclusion","description":"

Let's review what you learned in this part of the course about saving data into files, reading files, and deleting files, and then discuss what's next.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.731Z","updated_at":"2020-06-03T09:30:12.985Z","duration":52,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":144,"ordinal":16,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":541.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Conclusion","duration_in_time":"0:52","identifier":"1529","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1529/4f37675c-4f3d-441b-a85e-d361b9e4bce3.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]}]},{"id":148,"uri":"rw://betamax/parts/76","content_id":4561,"ordinal":2,"name":"SQLite","description":null,"created_at":"2018-05-03T17:09:30.798Z","updated_at":"2018-05-03T17:09:30.810Z","contents":[{"id":4656,"uri":"rw://betamax/videos/1530","name":"Introduction","description":"

You are introduced to SQLite and the concepts of relational databases, including tables, columns, keys, and relationships.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.827Z","updated_at":"2020-06-02T15:30:14.183Z","duration":132,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":17,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":906.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Introduction","duration_in_time":"2:12","identifier":"1530","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1530/c5c18d01-70fa-4b1e-a6f2-3d25a3336764.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]},{"id":4661,"uri":"rw://betamax/videos/1531","name":"Creating a Database","description":"

Create a database schema and use SQLiteOpenHelper to create a basic database. See how to use sqlite3 at the command line to review the database schema.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.852Z","updated_at":"2020-06-02T15:30:14.272Z","duration":385,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":18,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1010.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Creating a Database","duration_in_time":"6:25","identifier":"1531","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1531/6e209445-2279-468c-a163-e85fc3dcbb3e.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4666,"uri":"rw://betamax/videos/1532","name":"Writing Data","description":"

Use ContentValues as a means of writing data into SQLite. See how to use sqlite3 at the command line to query the database.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.881Z","updated_at":"2020-06-02T21:30:13.789Z","duration":217,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":19,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":898.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Writing Data","duration_in_time":"3:37","identifier":"1532","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1532/5b9e4922-7fd9-4a14-95d3-0b0dd2abeb93.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4670,"uri":"rw://betamax/videos/1533","name":"Challenge: Writing Data","description":"

Practice what you've learned so far about SQLite and ContentValues to write data into the SQLite database.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.915Z","updated_at":"2020-06-02T17:30:14.141Z","duration":124,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":20,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":693.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Challenge: Writing Data","duration_in_time":"2:04","identifier":"1533","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1533/e7329ed0-377a-4929-bd28-c4ce4b508aff.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4674,"uri":"rw://betamax/videos/1542","name":"Reading Data","description":"

Use Cursor and and its companion CursorWrapper to read data from the SQLite database and into model objects.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.942Z","updated_at":"2020-06-02T15:30:14.511Z","duration":345,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":21,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":693.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Reading Data","duration_in_time":"5:45","identifier":"1542","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1542/7c4449ae-a6dc-45d1-9295-065020ae8a25.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4676,"uri":"rw://betamax/videos/1544","name":"Deleting Data","description":"

See how to delete data from a SQLite database, and how to guard against SQL injection attacks in your SQL code.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.971Z","updated_at":"2020-06-02T15:30:14.698Z","duration":86,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":22,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":645.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Deleting Data","duration_in_time":"1:26","identifier":"1544","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1544/61aab66d-f78d-4942-996a-ade674134135.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4677,"uri":"rw://betamax/videos/1546","name":"Challenge: Deleting Data","description":"

Finish the use of the SQLiteRepository for saving app data by practicing what you've learned to delete files.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:30.999Z","updated_at":"2020-06-02T15:30:14.788Z","duration":72,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":23,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":600.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Challenge: Deleting Data","duration_in_time":"1:12","identifier":"1546","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1546/de864c89-583b-464d-97b1-d707c67dd5c7.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4678,"uri":"rw://betamax/videos/1548","name":"Database Migrations","description":"

Learn about using database versioning and database migrations to handle modifying your database schema after your app has shipped.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.025Z","updated_at":"2020-06-03T09:30:13.348Z","duration":470,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":24,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":695.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Database Migrations","duration_in_time":"7:50","identifier":"1548","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1548/4d20897c-1b45-4e64-befe-4d428be54d53.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4682,"uri":"rw://betamax/videos/1554","name":"Conclusion","description":"

Let's review what you learned about saving data in your app using SQLite, and then discuss what's next.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.048Z","updated_at":"2020-06-02T17:30:14.506Z","duration":56,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":148,"ordinal":25,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":573.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Conclusion","duration_in_time":"0:56","identifier":"1554","video_banner_url":null,"released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]}]},{"id":152,"uri":"rw://betamax/parts/77","content_id":4561,"ordinal":3,"name":"Room","description":null,"created_at":"2018-05-03T17:09:31.105Z","updated_at":"2018-05-03T17:09:31.114Z","contents":[{"id":4690,"uri":"rw://betamax/videos/1559","name":"Introduction","description":"

Learn about the Architecture Components from Google, including LiveData, ViewModel, and the data persistence library Room that provides a layer above SQLite.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.123Z","updated_at":"2020-06-03T13:30:15.119Z","duration":93,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":152,"ordinal":26,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1048.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Introduction","duration_in_time":"1:33","identifier":"1559","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1559/ad282022-6d4d-4c90-adbd-3698ac492542.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]},{"id":4693,"uri":"rw://betamax/videos/1560","name":"Architecture","description":"

Review a new architecture of the DataDrop app that uses Model-View-ViewModel (MVVM) instead of MVP, as preparation for working with LiveData and Room.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.142Z","updated_at":"2020-06-03T13:30:15.212Z","duration":862,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":152,"ordinal":27,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1133.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Architecture","duration_in_time":"14:22","identifier":"1560","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1560/12ba5896-93ee-437f-86a6-5cf7f9125129.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4696,"uri":"rw://betamax/videos/1562","name":"Entities and DAOs","description":"

Learn about the use of Entities and Data-Access-Objects (DAOs), and see how to set them both up using annotations.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.187Z","updated_at":"2020-06-03T10:30:17.019Z","duration":197,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":152,"ordinal":28,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":936.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Entities and DAOs","duration_in_time":"3:17","identifier":"1562","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1562/dd96c22b-848d-4ca8-8293-bc27028ea838.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4698,"uri":"rw://betamax/videos/1564","name":"Room Database","description":"

See how to create a Room database and how to read from and write data into Room. See also how to use TypeConverters and observe changes to LiveData.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.208Z","updated_at":"2020-06-02T19:30:13.510Z","duration":594,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":152,"ordinal":29,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1030.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Room Database","duration_in_time":"9:54","identifier":"1564","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1564/ccd1c19b-9f08-46e3-b111-f8083edf09f3.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4700,"uri":"rw://betamax/videos/1565","name":"Challenge: Room Database","description":"

Practice what you've learned about Room by finishing the RoomRepository to handle the delete use cases.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.235Z","updated_at":"2020-06-03T10:30:17.182Z","duration":187,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":152,"ordinal":30,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":839.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Challenge: Room Database","duration_in_time":"3:07","identifier":"1565","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1565/f5e08e2e-8290-4343-a3d4-7c2e13e21e85.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4703,"uri":"rw://betamax/videos/1566","name":"Relationships","description":"

See how to setup relationships in a Room database. Also see how to pre-populate Room data using a RoomDatabase.Callback.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.263Z","updated_at":"2020-06-03T10:30:17.255Z","duration":761,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":152,"ordinal":31,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":929.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Relationships","duration_in_time":"12:41","identifier":"1566","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1566/1b28c281-15ea-402e-8f32-0f192adb0b75.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4706,"uri":"rw://betamax/videos/1567","name":"Conclusion","description":"

In this final episode, we'll summarize this final part and the whole course, and then see an overview of data persistence topics that were not covered.

","released_at":"2018-03-27T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:31.284Z","updated_at":"2020-06-03T12:30:16.549Z","duration":97,"difficulty":"beginner","content_type":"episode","platform_id":17,"language_id":1,"editor_id":10,"group_id":152,"ordinal":32,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":650.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data on Android · Conclusion","duration_in_time":"1:37","identifier":"1567","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1567/b6becffe-f52f-49a8-81ea-970452226b8f.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]}]}]}

Welcome to our Learn At Home Sale!

Get immediate access to all our expert-led videos with a raywenderlich.com subscription!