Extension: Explorer files and directories.

[Juan Antonio]

Hi friends,

this extension is an explorer of files and directories.

You can obtain name or long format information with ExplorerX.

When is a directory, last chart is a "slash".

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This is other example about this extension:

- First element of ListView is Up Directory (..)

- Second element of ListView is Actual Directory (.)

- Regards.

Juan Antonio Villalpando.

kio4.com

[Abraham Getzler]

(added to Files section of FAQ)

https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/mitappinventortest/2cd6Uz__xA0/cPQSiZpcDAAJ

Abg

[albert choong]

It's good!
But I got runtime error when I click start button and any directory the first time.

If I click /mnt/ first instead then click any other directory, there's no runtime error.

[Juan Antonio]

Hi albert,

this works for me, I write, example; /mnt/sdcard/Android/ and works.

Maybe error is in Blocks-code App inventor.

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But I get an error only with mount point root, (only slash /)

If I write / in TextBox1 and then click button, I get error runtime, but...

if I insert a slash chart, it works fine.

[Juan Antonio]

This is other version.

I add RemoveFile, RemoveDir, MakeDir, Move, Copy and FileInfo.

- My Blocks-code in p280i_Explorer_Ops.aia is a simple example, it isn't optimized.

[Taifun]

for large files, the Copy and Move method might block the user interface...

see also the file extension, which additionally offers asynchronous methods for Copy and Move...

Taifun 

[Abraham Getzler]

(Taifun Asynch Extension added to Files section of FAQ)

https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/mitappinventortest/2cd6Uz__xA0/cPQSiZpcDAAJ

ABG

[albert choong]

Hi Juan

I tried to add some blocks to check if there is no slash in front of selection and  add /mnt/ , it seems to work. Can go to the directories without having to click /mnt/ first time and no runtime error. 

See image.

Also just some feedback...when I access external sd  card, some directories appear as a file .

Eg: a folder called Presents is shown as /mnt/m_external_sd/Presents with no slash at the end.

and some files are shown as a directory.

Eg: a file called thingsToDo.txt is shown as /mnt/m_external_sd/thingsToDo.txt/ with a slash at the end.

[Juan Antonio]

This extension use LINUX commands for copy and move (not code java).

Copy use cp command, is very speed, in my mobile 40 photos with a total of 120 MB is a delay less of 2 seconds. A file of 20 MB is instantaneous.

Move use mv command, in LINUX files not move, only change name (same inode), so instanteneous.

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Examples:

Make dir

Source: /mnt/sdcard/delete_me

Copy all files from a directory to other:

Source: /mnt/sdcard/DCIM/*.*

Dest: /mnt/sdcard/delete_me/                    (look final slash)

Remove a directory:

Source: /mnt/sdcard/delete_me/               (look final slash)

[Juan Antonio]

Hi Albert, maybe Presente is a "hard link".

You can download app in this post:

https://groups.google.com/forum/#!category-topic/mitappinventortest/app-inventor-extensions/zzW_HW7WLXQ

and write

ls -al /mnt/sdcard/your_directory/

If line start with d is a directory, start - is a file, start l is an hard link

Eg: 

ls -al /mnt/sdcard/your_directory/

drwxr-xr-x root root date time name_directory

-rw-r--r-- user user size date time name_file

lrwxrwxrwx root root date time sdcard -> /storage/emulated/legacy

[albert choong]

Hi Juan

OK I've tried the extension terminal and it shows that my directories are listed correctly as directories (with a 'd' in front) and files listed correctly as files (with a '-' in front).

No hard links for any files.

[Juan Antonio]

Hi Albert, thank you for info.

This is a new version with fixed error in slash.

EDIT: delete this version for compilation error.

[albert choong]

Hi Juan

It's working okay now. Thanks.

But when I try to build into apk I get these errors:

App Inventor is unable to compile this project. 
 The compiler error output was 
________Preparing application icon
________Creating animation xml
________Generating manifest file
________Attaching native libraries
________Attaching component assets
________Compiling source files
(compiling appinventor/ai_nrutas01/p280i_Extension_Explorador2/Screen1.yail to appinventor.ai_nrutas01.p280i_Extension_Explorador2.Screen1)
(compiling /tmp/runtime2482898142552950365.scm to com.google.youngandroid.runtime)
Kawa compile time: 19.283 seconds
________Invoking DX
YAIL compiler - DX execution failed.

• .
  

[Taifun]

@Albert concerning the "DX execution failed" error,  is this the only extension you are using?

if not, which extensions do you use?

Taifun

[albert choong]

Hi Taifun
I've used Juan's latest file explorer .aia sample
and tried to build apk - and got the errors.
It's using only his own extension and no others.

[Taifun]

in this case, Juan might want to check his extension...

this thread https://groups.google.com/d/msg/mitappinventortest/Fsf2bZKZ574/8InJyq69BgAJ might help Juan to fix this issue

Taifun

[Juan Antonio]

+1 to Taifun.

Thank you Taifun!, many test-files.java in componets/runtime produced the error, ant compile but then Yail fail to build apk.

Thank you Albert, you are a great beta tester :)

[albert choong]

Hi Juan,
Yay!
It's all working very well now.
Thanks! :)

[Juan Antonio]

- New version.

- Now App Inventor code for Explorer is very simple, only 2 blocks.

- When is a directory, last chart is a "slash". (Example: /mnt/sdcard/mydirectory/)

- First element of ListView is Up Directory (..)

- Second element of ListView is Actual Directory (.)