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(){
		@Override
		public void handleMessage(Message msg) {
			// TODO Auto-generated method stub
			super.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);
                
    }
	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.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
	}

	@Override
	protected void onStop() {
		// TODO Auto-generated method stub
		super.onStop();
		manager.unregisterListener(this);//解绑定Listener
	}

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

	@Override
	public 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);
		}	
	}
}