android手机晃动事件实例
注册监听
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;
}