Android(安卓)8.1 关机充电动画(三)Android模式
system:Android 8.1
platform:RK3326/PX30
uboot
kernel
system/core/healthd
Android 8.1 关机充电动画(一)模式选择
Android 8.1 关机充电动画(二)Uboot模式
Android 8.1 关机充电动画(三)Android模式
文章目录
- 前言
- 文件列表
- 修改 healthd_mode_charger.cpp
- init_animation
- healthd_mode_charger_init
- 替换图片
- 总结
前言
Android
模式下的关机充电动画修改相对来说需要修改Linux
应用层的东西了,可以定位到源码路径/system/core/healthd
下,和uboot
模式类似,这里只需要修改轮播的充电图片,然后将每张图片和电量百分比对应到代码中即可,思路还是比较简单的,下面我会慢慢分析具体实现的细节。
文件列表
在system/core/healthd下可以看到以下文件,只有一部分文件需要修改,我们需要重点关注一下healthd_mode_charger.cpp
,因为基本上修改这个文件就够了。
Android.mk11-Jun-20185.2 KiBanimation.h11-Jun-20181.7 KiBAnimationParser.cpp11-Jun-20184.8 KiBAnimationParser.h11-Jun-20181 KiBBatteryMonitor.cpp11-Jun-201824 KiBBatteryPropertiesRegistrar.cpp11-Jun-20184 KiBBatteryPropertiesRegistrar.h11-Jun-20181.8 KiBcharger.cpp11-Jun-20182.8 KiBhealthd.cpp11-Jun-20183.8 KiBhealthd_common.cpp11-Jun-20188.6 KiBhealthd_draw.cpp11-Jun-20185.7 KiBhealthd_draw.h11-Jun-20182.3 KiBhealthd_mode_android.cpp11-Jun-20182 KiBhealthd_mode_charger.cpp11-Jun-201820.6 KiBimages/11-Jun-20184 KiBinclude/11-Jun-20184 KiBtests/11-Jun-20184 KiB
修改 healthd_mode_charger.cpp
- 在头文件
animation.h
的结构体animation
添加成员变量user_animation_file
,如下所示;
struct animation {...#define USER_IMAGE_NUM 5std::string user_animation_file[USER_IMAGE_NUM];...}
- 在
healthd_mode_charger.cpp
添加frame
数组user_animation_frames
,目前添加了5帧画面,而且代码里直接固定为5帧的画面为一个充电循环来做,这里后面可能需要改动一下;
static animation::frame user_animation_frames[] = { { .disp_time = 750, .min_level = 0, .max_level = 19, .surface = NULL, }, { .disp_time = 750, .min_level = 0, .max_level = 39, .surface = NULL, }, { .disp_time = 750, .min_level = 0, .max_level = 59, .surface = NULL, }, { .disp_time = 750, .min_level = 0, .max_level = 79, .surface = NULL, }, { .disp_time = 750, .min_level = 0, .max_level = 100, .surface = NULL, },};
init_animation
需要对init_animation
函数进行部分的修改,这里简单说明一下;
animation_desc_path = "/res/values/charger/animation.txt"
,这里程序中路径具体我也没有找到源码中对应的路径,最终debug的结果是parse_success = false
是一直成立的;所以程序中会直接制定路径下的图片,源码路径system/core/healthd/images/
下的图片会在编译的过程中被拷贝到制定的路径下;- 原程序的做法只去解析一张
png
图片,而且这张图片中包含了所有电池电量百分比的对应信息。 - 修改部分加入到条件编译的宏定义
CHARGER_USER_ANIMATION
中;
animation* init_animation() { bool parse_success; std::string content; if (base::ReadFileToString(animation_desc_path, &content)) { parse_success = parse_animation_desc(content, &battery_animation); } else { LOGW("Could not open animation description at %s\n", animation_desc_path); parse_success = false; } if (!parse_success) { LOGW("Could not parse animation description. Using default animation.\n"); battery_animation = BASE_ANIMATION;#ifdef CHARGER_USER_ANIMATIONbattery_animation.user_animation_file[0].assign("charger/battery_user_0");battery_animation.user_animation_file[1].assign("charger/battery_user_1");battery_animation.user_animation_file[2].assign("charger/battery_user_2");battery_animation.user_animation_file[3].assign("charger/battery_user_3");battery_animation.user_animation_file[4].assign("charger/battery_user_4");battery_animation.frames = user_animation_frames; battery_animation.num_frames = ARRAY_SIZE(user_animation_frames);#else battery_animation.animation_file.assign("charger/battery_scale"); battery_animation.frames = default_animation_frames;battery_animation.num_frames = ARRAY_SIZE(default_animation_frames);#endif } if (battery_animation.fail_file.empty()) {#ifdef CHARGER_USER_ANIMATIONbattery_animation.fail_file.assign("charger/battery_user_fail");#else battery_animation.fail_file.assign("charger/battery_fail");#endif }if(battery_animation.text_percent.font_file.empty())battery_animation.text_percent.font_file.assign("charger/font");//battery_animation.text_clock.font_file.assign("charger/font"); LOGW("Animation Description:\n"); LOGW(" animation: %d %d '%s' (%d)\n", battery_animation.num_cycles, battery_animation.first_frame_repeats, battery_animation.animation_file.c_str(), battery_animation.num_frames); LOGW(" fail_file: '%s'\n", battery_animation.fail_file.c_str()); LOGW(" clock: %d %d %d %d %d %d '%s'\n", battery_animation.text_clock.pos_x, battery_animation.text_clock.pos_y, battery_animation.text_clock.color_r, battery_animation.text_clock.color_g, battery_animation.text_clock.color_b, battery_animation.text_clock.color_a, battery_animation.text_clock.font_file.c_str()); LOGW(" percent: %d %d %d %d %d %d '%s'\n", battery_animation.text_percent.pos_x, battery_animation.text_percent.pos_y, battery_animation.text_percent.color_r, battery_animation.text_percent.color_g, battery_animation.text_percent.color_b, battery_animation.text_percent.color_a, battery_animation.text_percent.font_file.c_str()); for (int i = 0; i < battery_animation.num_frames; i++) { LOGW(" frame %.2d: %d %d %d\n", i, battery_animation.frames[i].disp_time, battery_animation.frames[i].min_level, battery_animation.frames[i].max_level); } return &battery_animation;}
healthd_mode_charger_init
Android
底层的2D引擎库使用了skia
,对应的每一帧需要分配GRSurface
,通过函数res_create_display_surface
分配内存,所以,对于需要定制加入的图片,都需要重新分配内存,然后保存到anim->frames[i].surface
中,具体的修改如下所示;
void healthd_mode_charger_init(struct healthd_config* config) { int ret; charger* charger = &charger_state; int i; int epollfd; dump_last_kmsg(); LOGW("--------------- STARTING CHARGER MODE ---------------\n"); ret = ev_init(std::bind(&input_callback, charger, std::placeholders::_1, std::placeholders::_2)); if (!ret) { epollfd = ev_get_epollfd(); healthd_register_event(epollfd, charger_event_handler, EVENT_WAKEUP_FD); } animation* anim = init_animation(); charger->batt_anim = anim; ret = res_create_display_surface(anim->fail_file.c_str(), &charger->surf_unknown); if (ret < 0) { LOGE("Cannot load custom battery_fail image. Reverting to built in.\n"); ret = res_create_display_surface("charger/battery_fail", &charger->surf_unknown); if (ret < 0) { LOGE("Cannot load built in battery_fail image\n"); charger->surf_unknown = NULL; } }#ifdef CHARGER_USER_ANIMATION GRSurface* scale_frames[USER_IMAGE_NUM];for(int i = 0; i<USER_IMAGE_NUM; i++){ret = res_create_display_surface(anim->user_animation_file[i].c_str(), &scale_frames[i]);if (ret < 0) {LOGE("Cannot load custom %s image. Reverting to built in.\n",anim->user_animation_file[i].c_str());}else{anim->frames[i].surface = scale_frames[i];LOGW("file is:[%s],anim->frames[%d].surface = charger->surf_unknown;\n",anim->user_animation_file[i].c_str(),i);}}#elseGRSurface** scale_frames int scale_count; int scale_fps; // Not in use (charger/battery_scale doesn't have FPS text // chunk). We are using hard-coded frame.disp_time instead.ret = res_create_multi_display_surface(anim->animation_file.c_str(), &scale_count, &scale_fps, &scale_frames);if (ret < 0) {LOGE("Cannot load battery_scale image\n");anim->num_frames = 0;anim->num_cycles = 1;} else if (scale_count != anim->num_frames) {LOGE("battery_scale image has unexpected frame count (%d, expected %d)\n", scale_count, anim->num_frames);anim->num_frames = 0;anim->num_cycles = 1;} else {for (i = 0; i < anim->num_frames; i++) {anim->frames[i].surface = scale_frames[i];}}#endif ev_sync_key_state( std::bind(&set_key_callback, charger, std::placeholders::_1, std::placeholders::_2)); charger->next_screen_transition = -1; charger->next_key_check = -1; charger->next_pwr_check = -1; healthd_config = config; charger->boot_min_cap = config->boot_min_cap;}
替换图片
把图片复制到/system/core/healthd/images/
路径下,注意图片格式需要是png
,而且图片保存的位深度为8位,文件名需要和程序中定义的路径变量保持一致即可;如下所示;我简单地切了五张图片,感觉切图的时间比debug的时间还要久。苦。
然后,在Android.mk
中可找到,在编译的时候对图片进行了打包,相应的命令如下所示;
... _img_modules := _images := $(foreach _img, $(call find-subdir-subdir-files, "images", "*.png"), \ $(eval $(call _add-charger-image,$(_img))))...
完成以上这些步骤之后,重新编译Android
系统,当然还需要进入关机充电的Android
模式,可以发现充电动画已经修改完了。
总结
这里介绍的是比较简单对充电动画的单帧图片进行替换,如果有更加复杂的需求,还需要在healthd_draw.cpp
进行修改,或者更高级可以自己画充电动画出来也未尝不可。
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