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This post is bit of a follow up to my last post on how to build an app for multiple environments and local development using build types and product flavors. We will focus on how to install multiple of the resulting APKs on a single device.

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Different build types in android can be used to build the same application with different configurations. This can be predefined config values like 'debuggable', but you can also define your own config values that will be accessible in your application. This post will show you some ways in which you can use this functionality to easily build your app for different environments of remote services and for better local development.

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In my previous post, I showed you the basic setup for android with maven using the android-maven-plugin. Now I'll show you how to configure it to make releases with maven, and how to configure the plugins to save you some work.

Configuring the keystore data

If you have used the release archetype like in the previous post, most of the work is already done. The necessary plugins are configured and only need some additional data, like the data for your release keystore.

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Building and managing Android projects with maven is not as easy as it could be. So in this blog, I'll show you how we managed to get it work nicely.

In this example, we'll create a parent project with an app module and a separate instrumentation tests module.

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In this post, we want to show you our Liquibase setup in a larger scale project that we've been developing for some time now.

Gather Requirements

First off, a bit more information about the project and the whole project environment:

  • The software developed in this project consists of different applications
  • Some applications use the same database, some use different ones
  • The software runs in multiple branch offices of a company

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We had a case in an internal app, where on Phones only the Portrait mode should be possible and on Tablets only the Landscape mode. So I googled a bit and tried out some things, and here is the solution I found for this problem.

First, in each Activiy in the AndroidManifest (or each Activity that should have this behaviour, but I prefer a consistent behaviour for the whole app), declare the following:

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Within the scope of some Android R&D I took a look at Google's Cloud Message Service, GCM.

Well, the starter guide at is almost all you need to get started, so I'll explain my setup and some further instructions for a small test case.

In case you already decided to setup GCM for yourself: make sure to do the guide above until you reach the 'Writing the Android Application' part.

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In today's tutorial I'd like to show you how to implement a ListView, that only displays a limited number of entries. With a button at the end of the list, the user can load more entries.

To achieve this goal, we first need to implement a basic Adapter that provides our ListView with the entries:

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(Fortsetzung meines Blogposts von letztem Jahr)

Das dritte Jahr meiner Ausbildung bei synyx spielte sich zum Großteil in der Abteilung Code Clinic ab, in der ich etliche neue Technologien und Frameworks kennengelernt und eingesetzt habe.

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In a recent project I encountered a problem with SQLite on android 2.1. On later versions, my code worked perfectly, but on 2.1 it crashed every time when trying to get a column from a cursor.

Here's the simplified code: