记录android开发增加系统api所涉及到的各层级改动

最近要实现一个功能，上层的APP需要打开底层某个外设，涉及到java层，native层，so库层，HAL层以及kernel层。这里进行简单的记录。

1、frameworks/base/media/java/android/media/AudioManager.java
　　public void AmSetVibratorMode(boolean on) {}
　　public boolean AmGetVibratorMode() {}
2、frameworks/base/services/core/java/com/android/server/audio/AudioService.java
　　public void AsSetVibratorMode(boolean on) {}
　　public boolean AsGetVibratorMode() {}
3、frameworks/base/media/java/android/media/AudioSystem.java
　　public static native int asSetVibratorMode(boolean on);
　　public static native boolean asIsVibratorMode();
4、frameworks/base/media/java/android/media/IAudioService.aidl
　　void AsSetVibratorMode(boolean on) ;
　　boolean AsGetVibratorMode();
5、frameworks/base/core/jni/android_media_AudioSystem.cpp
　　static jint android_media_AudioSystem_asSetVibratorMode(JNIEnv *env, jobject thiz, jboolean on){}
　　static jboolean android_media_AudioSystem_asIsVibratorMode(JNIEnv *env, jobject thiz){}
　　{"asSetVibratorMode", "(Z)I", (void *)android_media_AudioSystem_asSetVibratorMode}, //update static const JNINativeMethod gMethods[]
　　{"asIsVibratorMode", "()Z", (void *)android_media_AudioSystem_asIsVibratorMode},
6、frameworks/av/media/libmedia/AudioSystem.cpp
　　status_t AudioSystem::asSetVibratorMode(bool state){}
　　status_t AudioSystem::asIsVibratorMode(bool* state){}
7、frameworks/av/include/media/AudioSystem.h
　　static status_t asSetVibratorMode(bool state);
　　static status_t asIsVibratorMode(bool *state);
8、frameworks/av/services/audioflinger/AudioFlinger.cpp
　　status_t AudioFlinger::setVibratorMode(bool state){}
　　bool AudioFlinger::getVibratorMode() const{}
9、frameworks/av/services/audioflinger/AudioFlinger.h
　　virtual status_t setVibratorMode(bool state);
　　virtual bool getVibratorMode() const;
10、frameworks/av/media/libmedia/IAudioFlinger.cpp
　　SET_VIB_MODE,
　　GET_VIB_MODE,
　　virtual status_t setVibratorMode(bool state){}
　　virtual bool getVibratorMode() const{}
11、frameworks/av/include/media/IAudioFlinger.h
　　virtual status_t setVibratorMode(bool state) = 0;
　　virtual bool getVibratorMode() const = 0;
12、hardware/libhardware/include/hardware/audio.h
　　int (*set_vibrator_mode)(struct audio_hw_device *dev, bool state);
　　int (*get_vibrator_mode)(const struct audio_hw_device *dev, bool* state);
13、hardware/aw/audio/audio_hw.c
　　static int adev_set_vibrator_mode(struct audio_hw_device *dev, bool state){}
　　static int adev_get_vibrator_mode(const struct audio_hw_device *dev, bool *state){}
　　adev->device.set_vibrator_mode = adev_set_vibrator_mode;
　　adev->device.get_vibrator_mode = adev_get_vibrator_mode;

14、linux/kernel/sound/soc/sunxi/sun50iw3_sndcodec.c

　　static ssize_t modeStat_show(struct device *dev, struct device_attribute *attr, char *buf);

　　static ssize_t modeStat_store(struct device *dev, struct device_attribute *attr,const char *buf, size_t count);