Author: Luca Zanini

  • Swipe views

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    Luca Zanini
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    In a previous post I implemented a layout with 2 tabs using an action bar and fragments; the disadvantage of this layout is that dragging horizzontally the views in a similar way to Google Play would be very natural for the user. In Horizontal View Swiping with ViewPager you can see how to get this…

  • Basic configuration of Spring Security 3 and MySQL

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    Luca Zanini
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    In this post I explain how to implement Spring Security in a web application, as I did in a previous post but the authenticated user’s username and password are not saved to a file .xml but in a MySQL database. As in the previous post, I configure one user only trying to access index.html and…

  • Quickly switch between the code for the emulator to the code for the real device

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    Luca Zanini
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    In a previous post I explained the differences between the code for the emulator and the code for the real device, but the switch from one to another and vice versa is very cumbersome.In this post I propose a way to switch quickly from one situation to another with few changes.The specific code for the…

  • Basic configuration of Spring Security 3

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    Luca Zanini
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    In this post I write about a basic configuration of Spring Security 3, the Spring framework for authentication and authorization of the users. In this example there is only one user trying to access to index.html and he is redirected to the standard login page for authentication. In this project I use and configure maven…

  • Android XML Editor cannot process this input

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    Luca Zanini
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    If you open an XML document in Eclipse and you get the error “Android XML Editor can not process this input”, you can solve it by opening the preferences (Window menu -> Preferences) and select General -> Editors -> File Associations, highlight *.xml , and choose XM Editor as default editor, and then no more…

  • gimp-android-xdpi

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    Luca Zanini
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    I found this very useful plugin for gimp, called gimp-android-xdpi, that allows you to easily create images with the desired dimensions in the directories drawable-ldpi, drawable-mdpi, drawable-hdpi and drawable-xhdpi of an Android project, following the guidelines explained on Icon Design Guidelines and links therein.

  • The differences between the code for the emulator and the code for a real device

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    Luca Zanini
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    The Android developers can use Sensor Simulator to test their applications, in particular when they use sensors such as accelerometer or compass. In this post I explain the differences in the code for an activity that runs on the emulator or a real device, and I don’t discuss how to install or launch the emulator,…

  • Customizing the labels of an ActionBar

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    Luca Zanini
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    In the post Tab Layout in Android with ActionBar and Fragment I wrote an example of using an ActionBar whose labels are shown in uppercase even if you use the statement: actionBar.newTab (). setText (“my string”); where “my string” is lowercase. In this article I show how to customize the labels in lowercase but it…

  • Preventing the rotation of the screen in Android

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    Luca Zanini
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    To prevent rotation of the screen in Android you can use one of two statements:Android: screenOrientation = “portrait”orAndroid: screenOrientation = “landscape”being included in the activity tag in the file AndroidManifest.xml.

  • Keeping the Android screen on

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    Luca Zanini
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    Sometimes you prefer to keep the Android screen on also in case of prolonged inactivity, this limit is usually set at 30 seconds, beyond which the screen turns off to increase the battery life. This can be true for applications like watching movies, navigators, or even during the development phase of an application. To keep…