文章目录
- Android开机动画压缩包zip,自制开机动画
- 1.Android加载压缩包原理
- 2.自制开机动画
Android开机动画压缩包zip,自制开机动画
1.Android加载压缩包原理
这里有个md文件我们看下
核心部分,
首先要创建一个文件叫做desc.txt,这是规定的,
## desc.txt formatThe first line defines the general parameters of the animation://宽高,fps帧率WIDTH HEIGHT FPS* **WIDTH:** animation width (pixels)* **HEIGHT:** animation height (pixels)* **FPS:** frames per second, e.g. 60It is followed by a number of rows of the form://TYPE 是一个字符 ,是一个格式,COUNT多少次要运行bootanimation PAUSE是否延迟暂停一帧,PATH 0-4
//TYPE COUNT PAUSE PATH这四个参数都要写上TYPE COUNT PAUSE PATH [#RGBHEX [CLOCK1 [CLOCK2]]]* **TYPE:** a single char indicating what type of animation segment this is://启动结束会被打断,+ `p` -- this part will play unless interrupted by the end of the boot//无论如何都不会被打断+ `c` -- this part will play to completion, no matter what//0代表直到开机boot完成为止* **COUNT:** how many times to play the animation, or 0 to loop forever until boot is complete* **PAUSE:** number of FRAMES to delay after this part ends* **PATH:** directory in which to find the frames for this part (e.g. `part0`)* **RGBHEX:** _(OPTIONAL)_ a background color, specified as `#RRGGBB`
//坐标参数clock* **CLOCK1, CLOCK2:** _(OPTIONAL)_ the coordinates at which to draw the current time (for watches):+ If only `CLOCK1` is provided it is the y-coordinate of the clock and the x-coordinatedefaults to `c`+ If both `CLOCK1` and `CLOCK2` are provided then `CLOCK1` is the x-coordinate and `CLOCK2` isthe y-coodinate+ Values can be either a positive integer, a negative integer, or `c`- `c` -- will centre the text- `n` -- will position the text n pixels from the start; left edge for x-axis, bottom edgefor y-axis- `-n` -- will position the text n pixels from the end; right edge for x-axis, top edgefor y-axis- Examples:* `-24` or `c -24` will position the text 24 pixels from the top of the screen,centred horizontally* `16 c` will position the text 16 pixels from the left of the screen, centredvertically* `-32 32` will position the text such that the bottom right corner is 32 pixels aboveand 32 pixels left of the edges of the screenThere is also a special TYPE, `$SYSTEM`, that loads `/system/media/bootanimation.zip`
and plays that.
图片路径part0,表示图片文件夹,里面都是一张张的图片文件
## zipfile pathsThe system selects a boot animation zipfile from the following locations, in order:/system/media/bootanimation-encrypted.zip (if getprop("vold.decrypt") = '1')/system/media/bootanimation.zip/oem/media/bootanimation.zip## zipfile layoutThe `bootanimation.zip` archive file includes:desc.txt - a text filepart0 \part1 \ directories full of PNG frames... /partN /
如果我们预制了zip的文件,那么代码就会走movie
加载动画,解析zip里面的文件
BootAnimation::Animation* BootAnimation::loadAnimation(const String8& fn)
{if (mLoadedFiles.indexOf(fn) >= 0) {SLOGE("File \"%s\" is already loaded. Cyclic ref is not allowed",fn.string());return nullptr;}ZipFileRO *zip = ZipFileRO::open(fn);if (zip == nullptr) {SLOGE("Failed to open animation zip \"%s\": %s",fn.string(), strerror(errno));return nullptr;}Animation *animation = new Animation;animation->fileName = fn;animation->zip = zip;animation->clockFont.map = nullptr;mLoadedFiles.add(animation->fileName);//解析desc.txt文件,parseAnimationDesc(*animation);if (!preloadZip(*animation)) {return nullptr;}mLoadedFiles.remove(fn);return animation;
}
读取描述文件
这四个参数是必须要写的
把文件夹的每一帧图片加载进来,
然后就到一个关键方法,播放动画。
他会去执行每一个part文件夹,一帧一帧的绘制图片纹理。
2.自制开机动画
准备资源
编写desc.txt文件规则
第一行是宽高,帧率fps
有多少个part文件夹就写多少行数,
c 无论如何都会执行完当前的这个part部分,保证动画的连续性,1 循环一次,只播放一次, 0 停留的帧数,
#ffee00代表颜色值,c c代表位置,横纵坐标,都是center居中。
1080 360 60
c 1 0 part0 #ffee00 c c
c 0 0 part1 #ffee00 c c
c 1 0 part2 #ffee00 c c
c 1 1 part3 #ffee00 c c
c 1 0 part4 #ffee00 c c
打包zip的压缩包
zip -r -X -Z store bootanimation part*/* desc.txt
执行命令
如下图
预制到/system/media
把 bootanimation.zip 动画文件移动到 我们自定义的product 文件中。
配置文件 test.mk中添加如下内容
PRODUCT_COPY_FILES += \$(LOCAL_PATH)/bootanimation.zip:/system/media/bootanimation.zipPRODUCT_ARTIFACT_PATH_REQUIREMENT_WHITELIST +=\ /system/media/bootanimation.zip
然后测试运行