====== Android change boot animation ======

Android boot animation is composed of a series of PNG pictures that act as frames of a continuous animation. Each PNG frame is saved in a compressed format.

The boot animation file name is ''bootanimation.zip'', the format is ''.zip'' and the compression method is ''store''.

The animation file includes one ''desc.txt'' file and directories labelled ''part0'' to ''part4''.

```shell
-rw-rw-rw- 1 lxx lxx   74 Aug 17  2015 desc.txt
drwxrwxrwx 2 lxx lxx 4096 Mar 18 11:10 part0
drwxrwxrwx 2 lxx lxx 4096 Mar 18 11:11 part1
drwxrwxrwx 2 lxx lxx 4096 Mar 18 11:11 part2
drwxrwxrwx 2 lxx lxx 4096 Mar 18 13:41 part3
drwxrwxrwx 2 lxx lxx 4096 Mar 18 13:42 part4
```

  *''desc.txt'': animation property description file. Used to set the animation pixel (size), number of frames, number of cycles, file name, etc. 
<WRAP info>
The file format needs to be set to ANSI.
</WRAP>
  *''Part0'': folder containing first stage animation frames.
  *''Part1'': folder containing second stage animation frames.


''desc.txt'' file contents:
```
543 143 60
c 1 30 part0
c 1 0 part1
c 0 0 part2
c 1 64 part3
c 1 15 part4
```

**543 143 60**:
  * ''543'': the pixel width of the picture
  * ''143'': the pixel height of the picture
  * ''60'' : frame rate

**c 1 30 part0**:
  * ''c'' : the flag bit
  * ''1'' : the number of cycles is 1 (''0'' for infinite loop)
  * ''30'': the number of frames contained within part0
  * ''part0'': the directory of the picture

We can there calculate the time-duration of part0 as: ''30 * (1 / 60) seconds''. 

===== Generate and replace bootanimation =====

After you create the part folders and ''desc.txt'', you can use following Linux command to generate ''bootanimation.zip'':

```shell
zip -r -X -Z store bootanimation part*/* desc.txt 
``` 

Push ''bootanimation.zip'' to ''system/media'', and restart your SBC for changes to take effect.

```shell
adb root
adb remount
```