android-类似微信和米聊中摇一摇找好友的功能的实现

要实现该功能，主要借助于重力感应

package yyy.testsensor;public class TestSensorActivity extends Activity implements SensorEventListener {    private SensorManager manager;private Vibrator vibrator;private TextView xSensor,ySensor,zSensor;private float X = 0.0f;private float Y = 0.0f;private float Z = 0.0f;private Button button1,button2;private TextView textView;private Animation animation ,animation2 ;private FrameLayout layout;private ImageView imageView;private String[] strs;private Handler handler = new Handler(){@Overridepublic void handleMessage(Message msg) {// TODO Auto-generated method stubsuper.handleMessage(msg);switch (msg.what) {case 0:textView.setText((String)msg.obj);imageView.startAnimation(animation);textView.startAnimation(animation);break;}}};private int i = 0;/** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        manager = (SensorManager) getSystemService(SENSOR_SERVICE);  //首先得到传感器管理器对象        vibrator = (Vibrator) getSystemService(Service.VIBRATOR_SERVICE);                    }@Overrideprotected void onResume() {// TODO Auto-generated method stubsuper.onResume(); //注册监听器manager.registerListener(this, manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), manager.SENSOR_DELAY_NORMAL);                  //第一个参数是Listener，第二个参数是所得传感器类型，第三个参数值获取传感器信息的频率}@Overrideprotected void onStop() {// TODO Auto-generated method stubsuper.onStop();manager.unregisterListener(this);//解绑定Listener}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {// TODO Auto-generated method stub}@Overridepublic void onSensorChanged(SensorEvent event) {// TODO Auto-generated method stub//传感器信息改变时执行该方法float[] values = event.values;float x = values[0]; //x轴方向的重力加速度，向右为正float y = values[1]; // y轴方向的重力加速度，向前为正float z = values[2]; // z轴方向的重力加速度，向上为正if(x>40 || x<-40 || y>40 || y<-40 || z>40 || z<-40){//一般在这三个方向的重力加速度达到40就达到了摇晃手机的状态。当然这个值可以根据需要，自己定义。vibrator.vibrate(200);int random = getRandom();Message msg = new Message();msg.what = 0;msg.obj = strs[random];handler.sendMessage(msg);}}}