Attach android sources to your applications on eclipse

6 August, 2012 23:08 /

One of the awesome things about dealing with open software is to be able to access to the source code. When you deal with complex systems (so, every fraking day normally) the worst thing are black boxes that you cannot see, check or change their inside. This black boxes use to be closed/privaty systems/libraries/whatever. Lucky we are, android is open source you can get the source easily with repo but for developing applications in eclipse you can just install Android sources plugin and that’s it, really nice.

http://adt-addons.googlecode.com/svn/trunk/source/com.android.ide.eclipse.source.update/

Posted in: Android

Scrollbars like they used to be in Ubuntu

17 July, 2012 19:59 /

I honestly don’t know why I still use ubuntu, it pisses me off a lot with so many useless change related to its user interface, very pretty (the first 2 minutes) but totally useless. At least it’s easy to change this stuff. To go back to the typical scrollbar just execute this in a console:

$ gsettings set org.gnome.desktop.interface ubuntu-overlay-scrollbars false

Posted in: Ubuntu

Remove PIN code with at commands

5 July, 2012 8:13 /

So let’s say you have your precious modem with your sim card with pin code enabled. Let’s remove that bastard!

AT+CPIN?
+CPIN: SIM PIN

AT+CPIN=3714
OK

AT+CLCK=”SC”,0,”3714″
OK

AT+CPIN?
+CPIN: READY

OK

Obviously, you should replace 3714 with your current pin code.

Posted in: Miscelanea

Building Android: error: passing ‘const android::RefBase::weakref_impl’

28 June, 2012 10:08 /

If you are building android in ubuntu >10.04 you are gonna get this awesome error:

:0:0: warning: “_FORTIFY_SOURCE” redefined [enabled by default]
:0:0: note: this is the location of the previous definition
frameworks/base/libs/utils/RefBase.cpp: In member function ‘void android::RefBase::weakref_type::trackMe(bool, bool)’:
frameworks/base/libs/utils/RefBase.cpp:483:67: error: passing ‘const android::RefBase::weakref_impl’ as ‘this’ argument of ‘void android::RefBase::weakref_impl::trackMe(bool, bool)’ discards qualifiers [-fpermissive]
make: *** [out/host/linux-x86/obj/STATIC_LIBRARIES/libutils_intermediates/RefBase.o] Error 1

Like the error itself tell us, the fix is to add the flag fpermissive, so let’s edit frameworks/base/libs/utils/Android.mk and change:

LOCAL_CFLAGS += -DLIBUTILS_NATIVE=1 $(TOOL_CFLAGS)

to

LOCAL_CFLAGS += -DLIBUTILS_NATIVE=1 $(TOOL_CFLAGS) -fpermissive

And let the compiler do its job.

Posted in: Android

Building Android: error: “_FORTIFY_SOURCE” redefined [-Werror]

28 June, 2012 8:52 /

If you are building an old version of android probably you’ll have this error

host C++: obbtool <= frameworks/base/tools/obbtool/Main.cpp
:0:0: error: “_FORTIFY_SOURCE” redefined [-Werror]
:0:0: note: this is the location of the previous definition
cc1plus: all warnings being treated as errors

To fix this, edit build/core/combo/HOST_linux-x86.mk and replace:

HOST_GLOBAL_CFLAGS += -D_FORTIFY_SOURCE=0

with

HOST_GLOBAL_CFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0

And that’s it.

Posted in: Android

Split huge Innodb data file into several ones

27 June, 2012 11:51 /

Hi, I’m MySQL and I’m greedy, I WANNA ALL YOUR BYTES.

If you have a huge ibdata1 file (/var/lib/mysql/ibdata1) probably is because you don’t have innodb_file_per_table option in your my.cnf. To fix this follow this simple method (it requires to have free disk space):

  1. Add innodb_file_per_table to your my.cnf and restart MySQL
  2. Create list of innodb tables to migrate (all of them!)

    SELECT `TABLE_SCHEMA`,`TABLE_NAME` FROM TABLES WHERE ENGINE = ‘InnoDB’;
  3. For each table execute this:
    ALTER TABLE `table_name` ENGINE=InnoDB
    With that the table will be regenerated in its own file. But ibdata1 won’t shrink because MySQL is greedy and will keep that (empty) space for him
  4. Free space deleting ibdata1
  5. Profit
Posted in: Bases de Datos