One Line
The text explains the various ways in which Android allows for data storage, with a specific emphasis on shared preferences and the importance of context mode.
Slides
Slide Presentation (10 slides)
Key Points
- Storing data persistently in Android involves methods like shared preferences, internal storage, and external storage.
- Shared preferences allow for the retrieval and storage of values in Android, with the use of single or multiple preference files.
- Internal storage is useful for storing data files locally on a device's internal memory, accessible only within the app.
- External storage allows for the storage of data files publicly on shared external storage, accessible by other apps.
- SQLite database is preferred for dealing with large amounts of structured data in Android.
- Content providers in Android allow for multiple operations on data, such as insert, update, delete, and query.
- A content provider class needs to be created to store data persistently in Android applications, implementing six abstract methods.
- The MainActivity class in an Android app allows for the addition, update, deletion, and viewing of student records.
Summaries
37 word summary
Android offers multiple methods for persistently storing data, including shared preferences, internal storage, and external storage. The excerpt focuses on shared preferences, highlighting the use of single or multiple preference files and the significance of context mode.
42 word summary
Storing data persistently in Android can be achieved through various methods, such as shared preferences, internal storage, and external storage.
Shared preferences are discussed in the excerpt, emphasizing the use of single or multiple preference files and the importance of context mode
505 word summary
Storing data persistently in Android involves saving data in a way that it remains accessible even after the application is closed or the device is turned off. There are several methods available for achieving persistent data storage in Android, including shared preferences, internal storage,
The excerpt explains how to handle shared preferences in Android. It discusses the use of single or multiple preference files and provides methods for retrieving and storing values in shared preferences. The importance of context mode MODE_PRIVATE is highlighted to ensure file access only within the application
Android Internal Storage is a useful feature for storing data files locally on a device's internal memory. The data files can be accessed within the app using a FileInputStream object, but cannot be accessed by other apps. When the app is uninstalled, the data
The FileOutputStream class is used for writing data into a file, while the FileInputStream class is used for reading data from a file. The Context.getFilesDir() method returns the absolute path to the directory where files created with 'openFileOutput()' are stored
This excerpt discusses how to store and retrieve data using external storage in Android. It explains that external storage allows for the storage of data files publicly on shared external storage using the FileOutputStream object. The data files can be read using a FileInputStream object. The excerpt
To write a file to external storage in Android, you can use the FileOutputStream object and the getExternalStoragePublicDirectory method. First, create a file object with the desired file name and the public Downloads folder as the directory. Then, create a FileOutputStream
This excerpt provides an introduction to using the SQLite Database option in Android to store structured data. It explains that while Shared Preferences, Internal Storage, and External Storage are useful for storing small amounts of data, SQLite is preferred for dealing with large amounts of data
The MyDBHandler class in the Android application is responsible for handling the SQLite database. It includes methods for creating the database, adding a student, retrieving a student by ID, retrieving all students, updating a student, and deleting a student.
The
The MainActivity class in the Android app allows for the addition, update, deletion, and viewing of student records. The updateStudent() method updates a student's information based on their ID. If any fields are empty, a toast message is displayed. The
Content providers in Android allow for multiple operations on data, such as insert, update, delete, and query. They can be used to share app data with other apps without affecting them. Different ways to store app data include SQLite databases, files, and
To store data persistently in Android applications, a content provider class needs to be created. This class should extend the ContentProvider base class and implement six abstract methods: insert(), update(), delete(), query(), getType(), and onCreate(). The content provider also
The loadContacts() method is responsible for retrieving and displaying contacts from the device's contact provider. It clears the contactList to avoid duplicates and queries the contact database using the ContactsContract.CommonDataKinds.Phone.CONTENT/-URI. The Cursor is used to