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Download Android SQLite Essentials by Sunny Kumar Aditya PDF

By Sunny Kumar Aditya

Develop Android purposes with essentially the most standard database engines, SQLite

About This Book

  • Develop database-driven Android purposes and remain sooner than the curve
  • Explore the easiest suggestions to take advantage of cursors and loaders to accomplish optimal results
  • A step by step method of use SQLite for development Android applications

Who This booklet Is For

This is a perfect e-book for Android programmers who are looking to discover SQLite databases in accordance with Android functions. the final competency point anticipated of the reader is earlier wisdom of constructing purposes and simple wisdom of Android and SQL.

In Detail

SQLite is an open resource relational database administration approach. Android makes use of the SQLite database to shop and retrieve facts repeatedly. the motive force at the back of the platform is the database, allowing a myriad of selections for builders making state-of-the-art applications.

Android SQLite necessities makes a speciality of the middle strategies in the back of development database-driven purposes. This ebook covers the elemental and complicated issues with similar simplicity and element, so one can let readers to fast clutch and enforce the suggestions to construct an program database.

This ebook takes a hands-on, example-based method of support readers comprehend the middle issues of SQLite and Android database-driven functions. This e-book specializes in giving you latent in addition to frequent wisdom approximately practices and ways in the direction of improvement in an simply comprehensible manner.

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Additional info for Android SQLite Essentials

Sample text

Once opened, the database is cached to improve performance. Finally, we need to call the close() method to close the database object. Read/write status should be checked here with the help of the isReadOnly() method. By default, the database version is 1, and as we increment the database version numbers and release new versions, the upgrade will be performed. A simple example illustrating the use of the SQLiteOpenHelper class is present in the code bundle for this chapter; we would be using it for explanation: class SQLiteHelperClass { ...

Now we can access the data present in the first record.

Then we will use the raw query to fetch data back from the table. insert(TABLE_CONTACTS, null, cv); } ... d("DATABASE", "count is : " + count); } } ... delete(TABLE_CONTACTS, whereClause, whereArgs); } ... put("COL_1", 1);, the column is COL_1 and the value being inserted for that column is 1. With this method, Android can buffer the results of the query in a productive manner; as it doesn’t need to load all of the data into memory. To obtain the elements of the resulting query, you can use the getCount() method.

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