Android4.0开机音乐

1.添加所需要的音频库头文件。在frameworks/base/cmds/bootanimation/BootAnimation.h添加

#include
#include

2.在frameworks/base/cmds/bootanimation/BootAnimation.h中添加public方法：起名为bootMusic(),形式如下：

class BootAnimation : public Thread, public IBinder::DeathRecipient
{
public:
BootAnimation();
virtual ~BootAnimation(); sp session()const;
void bootMusic();
}

3.在frameworks/base/cmds/bootanimation/BootAnimation.cpp中添加bootMusic的实现方法：

void BootAnimation::bootMusic()
{
int index;
MediaPlayer* mp = new MediaPlayer();
if (mp->setDataSource("/system/etc/poweron.wav", NULL) == NO_ERROR) {
mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE);
mp->prepare();
}
AudioSystem::getStreamVolumeIndex(AUDIO_STREAM_ENFORCED_AUDIBLE, &index);
if (index != 0) {
mp->seekTo(0);
mp->start();
}
}

4.在frameworks/base/cmds/bootanimation/bootanimation_main.cpp中

在sp boot = new BootAnimation();与 IPCThreadState::self()->joinThreadPool();之间添加如下代码：

sp boot = new BootAnimation();
BootAnimation *animation = new BootAnimation();
animation->bootMusic();
IPCThreadState::self()->joinThreadPool();