Android Database Design Considerations
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There are several considerations specific to Android that you should consider when designing your databas
❑Files (such a.. Read more
SQLiteOpenHelper is an abstract class that wraps up the best practice pattern for creating, opening, and upgrading databases. By implementing and using an SQLiteOpenHelper, you hide the logic used to .. Read more
It’s good practice to create a helper class to simplify your database interactions.
Consider creating a database adapter, which adds an abstraction layer that encapsulates database inter-actions. It .. Read more
SQLite is a relational database management system (RDBMS). It is well regarded, being:
❑Open source
❑ Standards-compliant
❑ Lightweight
❑Single-tier
It has been implemented as a compact C library.. Read more
All di political parties for Nigeria don finish dia primary elections as na Thursday 9 June 2022 di INEC deadline for completion of primaries and submission of presidential candidates go expire.
On W.. Read more
It’s good practice to use Shared Preferences or a database to store your application data, but there are
still times when you’ll want to use fi les directly rather than rely on Android’s managed mech.. Read more
At the moment the Queen died, the throne passed immediately and without ceremony to the heir, Charles, the former Prince of Wales.
But there are a number of practical - and traditional - steps which .. Read more
Queen Elizabeth II was the longest-reigning monarch in British history. She had four children, eight grandchildren and 12 great-grandchildren.
She died on 8 September after 70 years on the throne and.. Read more
aged 96, after reigning for 70 years.
Her family gathered at her Scottish estate after concerns grew about her health earlier on Thursday.
The Queen came to the throne in 1952 and witnessed enormous.. Read more
In Chapter 5, you created an earthquake monitor that showed a list of recent earthquakes based on an Internet feed.
In the following example, you’ll create a Preferences page for this earthquake view.. Read more
The data persistence techniques in Android provide options for balancing speed, efficiency, and robustness:
❑Shared Preferences When storing the UI state, user preferences, or application settings, y.. Read more
In this chapter, you’ll be introduced to three of the most versatile data persistence techniques in Android — preferences, local files, and SQLite databases — before looking at Content Providers.
Sav.. Read more
Creating an Earthquake Viewer
In the following example, you’ll create a tool that uses a USGS earthquake feed to display a list of recent earthquakes.
You will return to this Earthquake application .. Read more
Introducing the Dialog Class
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The Dialog class implements a simple floating window that is constructed entirely within an Activity.
To use the base Dialog class, you crea.. Read more
Using Internet Resources:
With Internet connectivity and WebKit browser, you might well ask if there’s any reason to create native Internet-based applications when you could make a web-based version .. Read more
Introducing Adapters: Adapters are bridging classes that bind data to user-interface Views. The adapter is responsible for creat-ing the child views used to represent each item and providing access to.. Read more
To include a Broadcast Receiver in the application manifest, add a receiver tag within the applica-tion node specifying the class name of the Broadcast Receiver to register. The receiver node needs to.. Read more
As a system-level message-passing mechanism, Intents are capable of sending structured messages across process boundaries.
So far you’ve looked at using Intents to start new application components, b.. Read more
Using Intent Filters for Plug-ins and Extensibility
So far you’ve learned how to explicitly create implicit Intents, but that’s only half the story. Android lets future packages provide new functiona.. Read more
The anonymous nature of runtime binding makes it important to understand how Android resolves an implicit Intent into a particular application component.
As you saw previously, when using startActivi.. Read more
