Archive for the ‘Android’ Category

Using the Android Daydream API

Tuesday, January 22nd, 2013

Daydream is the new interactive screensaver mode that was added in the Android 4.2 / Jelly Beans release. Such “dreams” may be activated when the device is in idle mode or inserted into a dock.

In the following tutorial we’re going to create a simple daydream that starts a simple animation and in addition we’ll be adding a configuration screen to alter the behaviour of this daydream.

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Using the Android Fragment API in a Tablet App

Sunday, March 18th, 2012

Since I got a new tablet running Android 4.0 aka ice cream sandwich I wanted to play around a bit with the fragments API and creating an application for a tablet.

In the following tutorial, we’re going to build an application that renders several articles from a popular tech blog (just kidding) in a web view.

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Writing Styles and Themes on Android

Saturday, December 3rd, 2011

Using reusable styles and themes to modify an Android application’s look is really easy and helps to not violate thy DRY (don’t repeat yourself) principle by typing styles in every single UI element again and again.

In the following tutorial we’re going to write and apply some simple styles and a finally theme to a simple Android application.

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Managing Background Tasks on Android using the Alarm Manager

Sunday, November 27th, 2011

In today’s tutorial we’re going to take a look on how to handle periodically scheduled tasks on our Android device by using BroadcastReceivers, Services and the AlarmManager.

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Android Widget Tutorial: Creating a screen-lock Widget in a few steps

Thursday, October 6th, 2011

hasCode Android Widget Tutorial Logo In today’s Android tutorial we’re going to take a look at Android’s Widget API and how to make a widget interact with a service using intents.

We’re going to create a fully functional application that allows us to enable or disable our smartphone’s screen lock settings using a widget that can be placed on our  home screen.

Finally I am going to show how to use a smartphone to test and debug our application and connect it to the IDE.

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Playing around with the Android Animation Framework

Monday, September 27th, 2010

Animations add some spice to our Android applications and the offered animation framework makes it easy to create custom animations and tweens.

So lets dance around and create some animations ;) ..

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How to create an Android App using Google’s App Inventor

Wednesday, August 4th, 2010

Today we’re going to take a look at Google’s App Inventor feature that offers programming-novices a nice possibility to enter the fabulous world of Android App programming without deeper knowledge of the API or complex SDK installations.

So lets build some stuff ..

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Sensor Fun: Location Based Services and GPS for Android

Sunday, May 30th, 2010

The Android SDK offers a nice API to receive information about available providers for location based services and get the current location and coordinates.

In this short tutorial we’re going to build a small activity that displays a list of available location providers and shows the current position using gps services.

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Creating a simple Gesture App with Android

Friday, May 14th, 2010

The integration of gestures into your android app adds some nice functionality and is made very easy using Google’s GestureBuilder application and the integrated GestureLibrary and Gesture Overlay API – so let’s build a sample app.

If you need some basic information regarding gestures on android first – take a look at this article.

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Playing around with QR Codes

Tuesday, May 11th, 2010

Sometimes QR codes are a nice way to distribute information like calendar events, contact information, e-mail, geo-locations or internet addresses.

In the following article we’re going to encode information to QR code images using the ZXing library and afterwards decode information from a given QR code.

Finally we’re taking a look on online QR code generators and how to integrate the ZXing library in a Maven project.

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Sensor Fun: Creating a simple audio recorder/player

Sunday, May 2nd, 2010

Sound recording and playback is really simple using the MediaRecorder and MediaPlayer classes .. see the example below ..

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Sensor Fun: Using the accelerometer on Android

Tuesday, April 27th, 2010

Here is an example on how to use the accelerometer in your Android application. If you want to simulate the acceleration on the emulator I highly recommend the Sensor Simulator on the OpenIntents website.

The following example app displays the coordinates received by the sensor. (more…)

First steps on Android: Creating a simple Todo App

Monday, April 26th, 2010

In this tutorial we are going to build a simple todo app that is able to store simple todos in a database. The user is able to add new todos or delete old ones by clicking on a todo. For this tutorial we won’t use maven to keep it simple – if maven integration is desired – take a look at this tutorial. (more…)

Signing APK with the Maven-Jar-Signer Plugin

Saturday, April 17th, 2010

There is a nice Maven plugin helping you signing your Android app – the Maven Jar Signer Plugin. If you want to learn more about Maven integration in an android project take a look at this article. (more…)

How to integrate Android Development Tools and Maven

Friday, April 2nd, 2010

With the Maven Android Plugin it is possible to build and deploy/undeploy your android app and start/stop the emulator – if you’re used to maven you won’t be going without it ;)

If you’re interested in signing your apk using maven – take a look at this article. (more…)

Android Gestures

Sunday, March 21st, 2010

Since version 1.6 Android offers a library for recognition and handling of new gestures using a touch display. With the gesture builder it is possible to capture new gestures in the emulator. Gestures can be integrated into an activity like that: (more…)

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