Oct 6, 2013 - Rooting Memup SlidePad NG 808DC


After noticing there were no known methods of rooting the tablet Memup SlidePad NG 808DC (the methods for the other models did not work with this one), I took some hours off in the past 20th of July to check how hard it could be. It seems it's actually pretty easy and, finally, I'm going to post my method. Although the first root method on the web specific for this tablet, it may work for similar devices as well, but that's on your own responsibility.

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The following steps assume you know how to flash a ROM to your SlidePad, as well as using ADB to get the tablet's shell.

Pre-requisites: If not already, flash the original 4.1.1 ROM provided in the french memup website: http://www.memup.net/support/fr/produit.php?id_produit=112; ADB must be installed in your computer (http://www.howtogeek.com/125769/how-to-install-and-use-abd-the-android-debug-bridge-utility/http://pplware.sapo.pt/smartphones-tablets/android/como-usar-o-android-debug-bridge-adb/);

Step 1: Make sure /usr/xbin/su must already exists, the original 4.1.1 ROM provides it, so it's okay;

Step 2: Download http://download.clockworkmod.com/superuser/superuser.zip;

Step 3: Get the "su" binary from superuser.zip/armeabi to the SD card (/storage/sdcard0/external_sdcard);

Step 4: Enter the tablet's shell, using the command adb shell;

Step 5: Go root in the shell, using the command su;

Step 6: Backup /system/xbin/su, using cp /system/xbin/su /system/xbin/su.bak;

Step 7: Replace the system's "su" with the SD card one, using cp /storage/sdcard0/external_sdcard/su /system/xbin/su and then, chmod 6755 /system/xbin/su;

Step 8: Install Superuser APK (ClockworkMod's one) from the superuser.zip or Play Store;

Step 9: Run Superuser and let it update the "su" binary if a newer version is available;


You're welcome to ask for any clarification on the steps above.
Originally written on 20th July 2013, posted on 6th October 2013.

Aug 18, 2013 - Wrkout - Android App


I am now releasing a new Android application, Wrkout.

For fitness and sports fans to do their exercises in a guided, automated and timed manner.
Currently, it relies in the concept of high-intensity interval training (HIIT) which allows looping around multiple exercises with fixed rest and workout times, like Tabata.

Tabata is a form of high-intensity interval training based on a study by Izumi Tabata. It initially consisted of one exercise carried out intensively during 20 seconds with 10 seconds of rest after it. This exercise was looped 8 times, giving a total of 4 minutes.

It provides the ability for users to define/plan their own (multiple) workouts by defining lists of exercises and custom timings.

Wrkout is a featureful and supported version of Tabata Trainer, a free app which you can test and see if you like, prior to purchasing Wrkout.

Unique features provided by Wrkout in comparison to Tabata Trainer:

  • Definition of multiple workouts for quick selection;
  • Free reordering of exercises in each workout;
  • Definition of warm-up time and round rest time;
  • Countdown sounds (3, 2, 1)!

Features already provided by Tabata Trainer:

  • HIIT timer with start/pause/stop controls;
  • Definition of rest time, exercise time and number of rounds;
  • Definition of any number of exercises, with textual descriptions, that form a custom workout;
  • Text-to-speech engine to read exercises' names to guide users throughout their workouts;
  • Sound alerts: Resting; Exercising; Darth Vader breath stimulator; Workout completed;
  • Supported languages: English, Portuguese, Spanish, Italian and French;
  • No ads and no special access permissions required;
  • Sound, speech and the display's sleeping mode are configurable;
  • Horizontal layout and Tablet support;
  • Settings;
  • Customizable sounds;
  • Ability to disable the background gradient.
[the list of features was last updated on November 2013 and is now outdated, please check the changelog.]

    You can start using Wrkout via Google Play Store for a one-time only fee.

    If you just want to try Tabata Trainer for free, you can also get it via Google Play Store or Amazon Appstore.

    Wrkout has been mentioned in the following websites:

    May 22, 2013 - Android latest SDK: java.lang.ClassNotFoundException


    Since the latest Android SDK revision (22) it is possible to get java.lang.ClassNotFoundException or other unexpected errors with Eclipse, for instance when making use of one Android project in another Android project.

    An example of failure can also be found when trying to use the Android support library:

    05-22 19:49:46.240: E/AndroidRuntime(4094): Caused by: java.lang.NoClassDefFoundError: android.support.v4.app.NotificationCompat$Builder

    To fix this, developers must now explicitly export the Android Private Libraries.


    Open the properties of your Android projects (even the ones that are included by other projects), select Java Build Path, Order and Export, and finally check Android Private Libraries.