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Author Archives: Katerina Zamani

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Katerina has graduated from the Department of Informatics and Telecommunications in National and Kapodistrian University of Athens (NKUA) and she attends MSc courses in Advanced Information Systems at the same department. Currently, her main academic interests focus on web applications, mobile development, software engineering, databases and telecommunications.

Android Drag and Drop Example

The Android System provides Drag and Drop framework, which facilitates users especially to move data from one View to another within the current layout. It is good to mention that many apps take advantage of the graphical drag and drop gesture that the system procures. The framework contains the following three components, which support drag and drop functionality: Drag event ...

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Android Fragments Example

A Fragment represents a portion of a user interface or an operation that runs within an Activity. A single activity can contain multiple fragments and many fragments can be reused in many, different activities. It is not wrong if we say that a fragment is a type of sub-activity that can be utilized again in multiple activities. Although each fragment ...

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Android Intents and Intent Filters Example

An Android Intent is a “message object” that its purpose is to activate a component of an application (activity, service or broadcastreceiver). Intents allow you to interact with components that belong either at the same application or outside that application. It is an abstract description of an operation to be performed or announced. The Intent object contains information which is ...

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Android Content Provider Example

A Content Provider is used to share and access data from a central repository. Usually android applications keep data hidden from the other applications but sometimes, it is useful to share data across them. So, content provider is a suitable reason to share data with other applications, based on a standard interface. There are many different ways to store data ...

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Android Broadcast Receivers Example

The Android system uses broadcasts messages (often are called Intents or Events) to transfer information to applications. The Broadcasts can be sent either by Android apps or, most commonly, by the system itself. There are many system generated events that Intent class defines for receiving broadcasts, which some of them you can find in the Standard Broadcast Actions of Android ...

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