android定制化开关机动画、铃音
系统通常默认支持开机动画，开机关机铃声服务倒是预先定义了，不过使用时需要在/sysytem/media/下添加相应的音频文件。长按Power键弹出关键选项，关机时也只是显示进度条，而不是我们期望的关机动画同时伴有关机铃声，当然在做二次开发的时候，这些都是可以定制的。下面将逐步分析如何实现这些定制化的需求。
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一.<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>制作开机动画
开机画面是保存在/system/media的bootanimation.zip，下面分析系统开机画面的构成
文件名为bootanimation.zip<wbr></wbr>一定是这个不能修改，里面包含part1 part2文件夹 和desc.txt，part<wbr></wbr>文件夹里面放的是动画拆分的图片，格式为png，<wbr>desc.txt</wbr>里面是播放的设置。
格式是这样的
480 800 15
p 1 0 part0
p 0 0 part1
480 800是指显示的分辨率宽 高
15是一秒的帧数
p后面的数字是指播放次数<wbr>0</wbr>为循环，N为播放N次
后面那位数字一般为0（空指令），<wbr>表示播放一遍后稍作停顿的时间<span lang="EN-US"><br><span><span style="background-color:white">part0</span></span></span><span><span style="background-color:white">，<span lang="EN-US">part1<wbr></wbr></span>为文件夹名</span></span><span lang="EN-US"><br></span>一般<span><span style="background-color:white">我们只使用<span lang="EN-US">part0</span>目录</span></span></wbr>
图片准备好了，desc.txt里面的命令也准备好了，就可以把他们一起打包压缩成zip格式了。记住，是zip格式，而不是rar格式。另外压缩的时候注意一点，压缩的时候压缩方式要选择存储，否则开机时手机会不认的。当然不至于变砖，只是开机的时候会黑着没动画一直到进入桌面为止。
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开机动画的替换也很简单，我们把做好的bootanimation.zip替换掉原来的/system/media/bootanimation.zip文件即可。关机动画其实和开机动画的制作一样，我们命名为shutdownanimation.zip,和bootanimation.zip放在同一目录下。
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二.<wbr></wbr>开关机动画实现原理
Android系统在init.rc中定义了很多Servic，具体定义格式可以参考《Android Platform Developer’s Guide》中的“Android Init Language”。Init.rc中定义的Service将会被Init进程创建，其中已经定义的服务就包含了开机动画，但没有关机动画的定义
service bootsound /system/bin/mplayer /system/media/bootsound
<wbr><wbr><wbr><wbr>user media</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>group audio</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>oneshot</wbr></wbr></wbr></wbr>
//开机铃声服务<wbr><span lang="EN-US">/system/media/startupsound</span><span style="font-family:宋体">是铃声文件</span></wbr>
service startupsound /system/bin/mplayer /system/media/startupsound
<wbr><wbr><wbr><wbr>user media</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>group audio</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>disabled</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>oneshot</wbr></wbr></wbr></wbr>
//关机铃声服务<wbr><span lang="EN-US">/system/media/shutdownsound</span><span style="font-family:宋体">是关机铃声</span></wbr>
service shutdownsound /system/bin/mplayer /system/media/shutdownsound
<wbr><wbr><wbr><wbr>user media</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>group audio</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>disabled</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>oneshot</wbr></wbr></wbr></wbr>
//定义了一个bootanim的服务，对应执行/system/bin/bootanimation
//disabled<wbr></wbr>表示init进程创建只是创建它，但不立刻执行
//oneshot<wbr></wbr>表示该服务只执行一次
service bootanim /system/bin/bootanimation
<wbr><wbr><wbr><wbr>user graphics</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>group graphics</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>disabled</wbr></wbr></wbr></wbr>
oneshot
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当android系统boot时，开始加载动画和开机铃声，其代码位于
//源文件SurfaceFlinger.cpp
status_t SurfaceFlinger::readyToRun() {
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>// start boot animation service</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>property_set("ctl.start", "bootanim");//注
<wbr><wbr><wbr><wbr>{</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>char value[PROPERTY_VALUE_MAX];</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>property_get("persist.sys.profile.silent", value, "0");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>if (atoi(value)== 0){</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>LOGI("start:persist.sys.profile.silent is soundable");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>// start startupsound service</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>property_set("ctl.start","startupsound");//注
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>} else {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>LOGI("start:persist.sys.profile.silent is silent");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>return NO_ERROR;</wbr></wbr></wbr></wbr>
}
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当Android完成boot后，关闭动画和开机铃声，代码位于
//源文件SurfaceFlinger.cpp
void SurfaceFlinger::bootFinished() {
<wbr><wbr><wbr>const nsecs_t now = systemTime();</wbr></wbr></wbr>
<wbr><wbr><wbr>const nsecs_t duration = now - mBootTime;</wbr></wbr></wbr>
<wbr><wbr><wbr>LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );</wbr></wbr></wbr>
<wbr><wbr><wbr>mBootFinished = true;</wbr></wbr></wbr>
<wbr><wbr><wbr>//stop bootanim service</wbr></wbr></wbr>
<wbr><wbr><wbr></wbr></wbr></wbr>property_set("ctl.stop", "bootanim");
<wbr><wbr><wbr>char value[PROPERTY_VALUE_MAX];</wbr></wbr></wbr>
<wbr><wbr><wbr>property_get("persist.sys.profile.silent", value, "0");</wbr></wbr></wbr>
<wbr><wbr><wbr>if (atoi(value)== 0){</wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr>LOGI("stop:persist.sys.profile.silent is soundable");</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr>//stop startupsound service</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>property_set("ctl.stop","startupsound");
<wbr><wbr><wbr>} else {</wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr>LOGI("stop:persist.sys.profile.silent is silent");</wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr>}</wbr></wbr></wbr>
}
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如何理解ctr.start和ctr.stop系统属性?
每一项服务必须在/init.rc中定义.Android系统启动时，init守护进程将解析init.rc和启动属性服务，属性“ ctl.start ”和“ ctl.stop ”是用来启动和停止服务的。一旦收到设置“ ctrl.start ”属性的请求，属性服务将使用该属性值作为服务名找到该服务，启动该服务。这项服务的启动结果将会放入“ init.svc.<服务名>“属性中<wbr></wbr>。客户端应用程序可以轮询那个属性值，以确定结果。想更深入了解Android property系统可以参考博文《（翻译）Android属性系统》。
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property_set("ctl.start",ServiceName);就是启动ServiceName服务(在init.rc中定义)；
property_set("ctl.stop",ServiceName)相对的是关闭ServiceName服务。
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A启动动画服务
由于开机动画和关机动画除了播放的动画文件不同，其他的完全一致，这里重复利用/system/bin/bootanimation代码,<wbr></wbr>仿照开机动画服务，我们新定义关机动画
service shutdownanim /system/bin/bootanimation -shutdown
<wbr><wbr><wbr><wbr>user graphics</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>group graphics</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>disabled</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>oneshot</wbr></wbr></wbr></wbr>
唯一要注意的是关机动画使用的/system/bin/bootanimation带了-shutdown参数，这个参数用来区分加载的动画文件为开机还是关机动画。当bootanimation服务启动时，进入/frameworks/base/cmds/bootanimation/bootanimation_main.cpp主函数main，
int main(int argc, char** argv)
{
#if defined(HAVE_PTHREADS)
<wbr><wbr><wbr><wbr>setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_DISPLAY);</wbr></wbr></wbr></wbr>
#endif
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<wbr><wbr><wbr><wbr>char value[PROPERTY_VALUE_MAX];</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>property_get("debug.sf.nobootanimation", value, "0");</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>int noBootAnimation = atoi(value);</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>LOGI_IF(noBootAnimation,<wbr><wbr>"boot animation disabled");</wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>if (!noBootAnimation) {</wbr></wbr></wbr></wbr>
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<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>sp<ProcessState> proc(ProcessState::self());</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>ProcessState::self()->startThreadPool();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>// create the animation object</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>sp<BootAnimation> boot = new BootAnimation();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>//</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>根据是否有参数，来设置动画对象的isShutdown属性
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span style="color:red">if (argc > 0) {</span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>if (strcmp(argv[0], "-shutdown")==0) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>boot->isShutdown(true);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
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<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>IPCThreadState::self()->joinThreadPool();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>return 0;</wbr></wbr></wbr></wbr>
}
new BootAnimation();时，如果有参数-shutdown,<wbr></wbr>则boot->isShutdown(true);方法isShutdown和isShutdown使我们新加的，所以先要在frameworks/base/cmds/bootanimation/bootanimation/BootAnimation.h头文件中申明为public，如下:
class BootAnimation : public Thread, public IBinder::DeathRecipient
{
public:
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>BootAnimation();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>virtual<wbr><wbr><wbr><wbr><wbr>~BootAnimation();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
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<wbr><wbr><wbr><wbr>sp<SurfaceComposerClient> session() const;</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><span style="color:red">bool<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>mShutdown;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></span></wbr></wbr></wbr></wbr>
void<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>isShutdown(bool shutdown);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
…………………………………………….
}
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之后修改BootAnimation.cpp
//源码位于frameworks/base/cmds/bootanimation/bootanimation/BootAnimation.cpp
首先在构造函数中初始化mShutdown = false;表示默认是开机标志
BootAnimation::BootAnimation() : Thread(false)
{
<wbr><wbr><wbr><wbr>mSession = new SurfaceComposerClient();</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>mShutdown = false;</wbr></wbr></wbr></wbr>
}
实现isShutdown(bool shutdown);方法
void BootAnimation::isShutdown(bool shutdown)
{
<wbr><wbr><wbr><wbr>mShutdown = shutdown;</wbr></wbr></wbr></wbr>
}
修改status_t BootAnimation::readyToRun()<wbr></wbr>方法来根据mShutdown值加载动画文件，如
status_t BootAnimation::readyToRun() {
……………………………………
mAndroidAnimation = false;
if (!mShutdown) {
<wbr><wbr><wbr><wbr>status_t err = mZip.open("/data/local/bootanimation.zip");</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>if (err != NO_ERROR) {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>err = mZip.open("/system/media/bootanimation.zip");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>if (err != NO_ERROR) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>mAndroidAnimation = true;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
}<wbr>else {</wbr>
<wbr><wbr><wbr><wbr>status_t err = mZip.open("/data/local/shutdownanimation.zip");</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>if (err != NO_ERROR) {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>err = mZip.open("/system/media/shutdownanimation.zip");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>if (err != NO_ERROR) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>mAndroidAnimation = true;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>mShutdown = false;</wbr></wbr></wbr></wbr>
}
return NO_ERROR;
}
以上是动画定制化C代码部分的全部修改。
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B启动开机铃声服务
startupsound开机铃声服务，shutdownsound关机铃声服务
init.rc定义,service startupsound /system/bin/mplayer /system/media/startupsound
相当于用/system/bin/mplayer对象播放媒体文件/system/media/startupsound，
init.rc定义,service shutdownsound /system/bin/mplayer /system/media/shutdownsound
相当于用/system/bin/mplayer对象播放媒体文件/system/media/ shutdownsound.
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到这里，开机动画和开机铃声是正常的，我们还需要修改的是关机时候的执行流程，因为默认的操作时关机确认后显示进度条。
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C定制Android关机过程
在Android系统中，长按Power键默认会弹出对话框让你选择“飞行模式”，“静音”，“关机”等功能。
<wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr>我的目标是长按Power键，将会关机，弹出“设备将要关机”选择对话框。如果可以选择“是”关机，和“否”返回系统。
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弹出对话框的代码位于：
frameworks\policies\base\phone\com\android\internal\policy\impl\PhoneWindowManager.java
长按Power键显示对话框的代码如下：
Runnable mPowerLongPress = new Runnable() {
<wbr><wbr><wbr><wbr>public void run() {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>mShouldTurnOffOnKeyUp = false;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>performHapticFeedbackLw(null, HapticFeedbackConstants.LONG_PRESS, false);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>showGlobalActionsDialog();
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
};
调用showGlobalActionsDialog方法将会显示上面提到的显示“飞行模式”，“静音”，“关机”，选项的对话框。
<wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr>关机的代码位于：
frameworks\policies\base\phone\com\android\internal\policy\impl\GlobalActions.java
文件的createDialog方法中，有如下代码：
mItems = Lists.newArrayList(
<wbr><wbr><wbr><wbr>// silent mode</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>mSilentModeToggle,</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>// next: airplane mode</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>mAirplaneModeOn,</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>// last: power off</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>new SinglePressAction(</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>com.android.internal.R.drawable.ic_lock_power_off,</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>R.string.global_action_power_off) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>public void onPress() {
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>// shutdown by making sure radio and power are handled accordingly.</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>ShutdownThread.shutdown(mContext, true);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>public boolean showDuringKeyguard() {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>return true;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>public boolean showBeforeProvisioning() {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>return true</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>});</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
从代码中我们可以看出，如果选择上述对话框的“关机”选项之后，将会调用ShutdownThread的shutdown方法来关机。shutdown方法的第二个参数标识是否弹出询问对话框。
<wbr></wbr>
ShutdownThread代码位于
frameworks/base/core/java/com/android/internal/app/ShutdownThread.java
shutdown方法中有如下代码
public static void shutdown(final Context context, boolean confirm) {
<wbr><wbr><wbr><wbr>// ensure that only one thread is trying to power down.</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>// any additional calls are just returned</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>synchronized (sIsStartedGuard){</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>if (sIsStarted) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Log.d(TAG, "Request to shutdown already running, returning.");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>return;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr>Log.d(TAG, "Notifying thread to start radio shutdown");</wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr>if (confirm) {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>final AlertDialog dialog = new AlertDialog.Builder(context)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.setIcon(android.R.drawable.ic_dialog_alert)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.setTitle(com.android.internal.R.string.power_off)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.setMessage(com.android.internal.R.string.shutdown_confirm)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.setPositiveButton(com.android.internal.R.string.yes,</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
new DialogInterface.OnClickListener() {
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>public void onClick(DialogInterface dialog, int which) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>beginShutdownSequence(context);
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>})</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.setNegativeButton(com.android.internal.R.string.no, null)</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>.create();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>if (!context.getResources().getBoolean(</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>com.android.internal.R.bool.config_sf_slowBlur)) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>dialog.show();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>} else {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>beginShutdownSequence(context);
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
}
<wbr></wbr>
确认关机后开始执行beginShutdownSequence(context),这里就是我们定制关机过程的关键。
<wbr></wbr>
修改beginShutdownSequence(context)方法,在方法开头打印Log之后增加如下代码:
//我们判断如果有关机动画文件，即显示关机动画，否则显示默认的进度条。
boolean showShutdownAnim = new File("/system/media/shutdownanimation.zip").exists();
<wbr><wbr><wbr><wbr>if (showShutdownAnim) {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Log.d(TAG, "shutdownanim");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>//</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>设置前面说的android系统属性ctr.start，即通知属性服务启动关机动画服务
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>android.os.SystemProperties.set("ctl.start", "shutdownanim");
<wbr><wbr><wbr><wbr>} else {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>// throw up an indeterminate system dialog to indicate radio is</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>// shutting down.</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>ProgressDialog pd = new ProgressDialog(context);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>pd.setTitle(context.getText(com.android.internal.R.string.power_off));</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>pd.setMessage(context.getText(com.android.internal.R.string.shutdown_progress));</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>pd.setIndeterminate(true);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>pd.setCancelable(false);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>pd.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>if (!context.getResources().getBoolean(</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>com.android.internal.R.bool.config_sf_slowBlur)) {</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>pd.getWindow().addFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>pd.show();</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr>
<wbr></wbr>
<wbr><wbr><wbr><wbr>boolean playShutdownSound = new File("/system/media/shutdownsound").exists();</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>android.os.SystemProperties.getBoolean("ro.config.enable_shutdownshound", false);</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr>if (playShutdownSound) {</wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>// play shutdown sound</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>Log.d(TAG, "shutdownsound");</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>android.os.SystemProperties.set("ctl.start", "shutdownsound");
}
以上就是定制化实现的所有需要修改的地方，想更深入了解Android property系统可以参考博文《(翻译)Android属性系统》。