mtk android vibration小结

上层应用：

Vibrator mVibrator; 

mVibrator.vibrate( );

a) 上层调用：

Vibrator.java 
    public void vibrate(long milliseconds)
    {   
            mService.vibrate(milliseconds, mToken);        
    }

ps:

其中mService = IVibratorService.Stub.asInterface(
                ServiceManager.getService("vibrator"));

b) AIDL处理 

(IVibratorService.aidl)

VibratorService.java

public class VibratorService extends IVibratorService.Stub
{

    public void vibrate(long milliseconds, IBinder token) {

        Vibration vib = new Vibration(token, milliseconds, uid); 
        startVibrationLocked(vib);
    }

    private void startVibrationLocked(final Vibration vib) {        
            vibratorOn(vib.mTimeout);           
        }
    }

}

c)  JNI 转化（JAVA -->C/C++）

com_android_server_VibratorService.cpp

static JNINativeMethod method_table[] = {
    { "vibratorOn", "(J)V", (void*)vibratorOn },
    { "vibratorOff", "()V", (void*)vibratorOff }
};

static void vibratorOn(JNIEnv *env, jobject clazz, jlong timeout_ms)
{
    LOGI("com_android_server_VibratorService.cpp libin vibratorOn\n");
    vibrator_on(timeout_ms);
}


d) 底层处理

vibrator.c  

int vibrator_on(int timeout_ms)