Android

Introduction to Android Content Providers

A Content Provider is used to share and access to a structured set of data. The main idea is to encapsulate the data that we want to share and provide mechanisms for access this data safely through a ContentResolver interface, first the client make a…

Android Intents

An Intent is a asynchronous messages object which allow to request an action from another components of the same application as well as with components of other applications. For example some actions that could be triggered by an intent could be to pick a contact, take a photo, dial a phone number…

Android Using Picasso to View Images

The ImageView class can load images from local or from content providers, but is not prepare to load an image from the web.

The main problem is that getting data over the web must be done in an asynchronously way. A good solution is to use…

Android Handler Example

A Handler allows send and process Message and Runnable objects associated with a thread’s looper MessageQueue. Each Handler instance is associated with a single thread and that thread’s message queue.

Android Camera — Take photo

Let’s create a simple camera app, we will simply take a photo and we will save it in the device, in a future example will add the functionality to record video.

Creating the Project

Two fragments in one activity

A fragment represents a portion of user interface in an Activity, and provides a mechanism for creating reusable modules, after being created this module can be embedded within activities. In this example we will combine two fragments in an activity and follow the steps for…