Android摇一摇震动效果Demo

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class MainActivity extends Activity {
	private SensorManager sensorManager;
	private SensorEventListener shakeListener;
	private AlertDialog.Builder dialogBuilder;

	private boolean isRefresh = false;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
		shakeListener = new ShakeSensorListener();

		dialogBuilder = new AlertDialog.Builder(this);
		dialogBuilder.setPositiveButton("确定", new OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				isRefresh = false;
				dialog.cancel();
			}
		}).setMessage("摇到了一个漂亮妹子！").create();
	}

	@Override
	protected void onResume() {
		sensorManager.registerListener(shakeListener,
				sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
				SensorManager.SENSOR_DELAY_FASTEST);
		super.onResume();
	}

	@Override
	protected void onPause() {
		// acitivity后台时取消监听
		sensorManager.unregisterListener(shakeListener);

		super.onPause();
	}

	private class ShakeSensorListener implements SensorEventListener {
		private static final int ACCELERATE_VALUE = 20;

		@Override
		public void onSensorChanged(SensorEvent event) {

//			Log.e("zhengyi.wzy", "type is :" + event.sensor.getType());

			// 判断是否处于刷新状态(例如微信中的查找附近人)
			if (isRefresh) {
				return;
			}

			float[] values = event.values;

			/**
			 * 一般在这三个方向的重力加速度达到20就达到了摇晃手机的状态 x : x轴方向的重力加速度，向右为正 y :
			 * y轴方向的重力加速度，向前为正 z : z轴方向的重力加速度，向上为正
			 */
			float x = Math.abs(values[0]);
			float y = Math.abs(values[1]);
			float z = Math.abs(values[2]);

			Log.e("zhengyi.wzy", "x is :" + x + " y is :" + y + " z is :" + z);
			
			if (x >= ACCELERATE_VALUE || y >= ACCELERATE_VALUE
					|| z >= ACCELERATE_VALUE) {
				Toast.makeText(
						MainActivity.this,
						"accelerate speed :"
								+ (x >= ACCELERATE_VALUE ? x
										: y >= ACCELERATE_VALUE ? y : z),
						Toast.LENGTH_SHORT).show();

				VibratorHelper.Vibrate(MainActivity.this, 300);
				isRefresh = true;
				dialogBuilder.show();
			}

		}

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

	}

}