Android手机晃动事件实例

sm = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
  int sensorType = Android.hardware.Sensor.TYPE_ACCELEROMETER;
  sm.registerListener(mySensorEventListener, sm
    .getDefaultSensor(sensorType),
    SensorManager.SENSOR_DELAY_FASTEST);

事件触发
 public final SensorEventListener mySensorEventListener = new SensorEventListener() {

@Override
  public void onAccuracyChanged(android.hardware.Sensor sensor,
    int accuracy) {
   // TODO Auto-generated method stub

}

@Override
  public void onSensorChanged(SensorEvent event) {
   // TODO Auto-generated method stub
   if (event.sensor.getType() == android.hardware.Sensor.TYPE_ACCELEROMETER) {

// 获取加速度传感器的三个参数

float x = event.values[SensorManager.DATA_X];

float y = event.values[SensorManager.DATA_Y];

float z = event.values[SensorManager.DATA_Z];

// 获取当前时刻的毫秒数

curTime = System.currentTimeMillis();

// 100毫秒检测一次

float aa = curTime - lastTime;

if ((curTime - lastTime) > 100) {

duration = (curTime - lastTime);

// 看是不是刚开始晃动

if (last_x == 0.0f && last_y == 0.0f && last_z == 0.0f) {

// last_x、last_y、last_z同时为0时，表示刚刚开始记录

initTime = System.currentTimeMillis();

} else {

// 单次晃动幅度

shake = (Math.abs(x - last_x) + Math.abs(y - last_y) + Math
        .abs(z - last_z));
      // / duration * 1000;

}

// 把每次的晃动幅度相加，得到总体晃动幅度

totalShake += shake;

// 判断是否为摇动

if (shake > 20) {
      action();
      onVibrator();

initShake();
     }
     last_x = x;

last_y = y;

last_z = z;

lastTime = curTime;

}

}
  }
 };

其中 onVibrator();是触发震动 ：

private void onVibrator() {
  Vibrator vibrator = (Vibrator) context
    .getSystemService(Context.VIBRATOR_SERVICE);
  if (vibrator == null) {
   Vibrator localVibrator = (Vibrator) context.getApplicationContext()
     .getSystemService("vibrator");
   vibrator = localVibrator;
  }
  vibrator.vibrate(100L);
 }

掉用系统震动这样反应快 ，自己写的long数组

调用有时间间隔，效果不好

initShake();初始化事件触发的几个变量：

 public void initShake() {

lastTime = 0;

duration = 0;

curTime = 0;

initTime = 0;

last_x = 0.0f;

last_y = 0.0f;

last_z = 0.0f;

shake = 0.0f;

totalShake = 0.0f;

}