android 类似微信的摇一摇功能实现思路及代码

package com.eboy.testyaoyiyao; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import android.app.Activity; 
import android.hardware.Sensor; 
import android.hardware.SensorEvent; 
import android.hardware.SensorEventListener; 
import android.hardware.SensorManager; 
import android.os.Bundle; 
import android.os.Vibrator; 
import android.view.Menu; 
import android.widget.TextView; 
public class MainActivity extends Activity implements SensorEventListener { 
//Sensor管理器 
private SensorManager mSensorManager = null; 
//震动 
private Vibrator mVibrator = null; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE); 
mVibrator = (Vibrator)getSystemService(VIBRATOR_SERVICE); 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
getMenuInflater().inflate(R.menu.activity_main, menu); 
return true; 
} 
public void onAccuracyChanged(Sensor arg0, int arg1) { 
// TODO Auto-generated method stub 
} 
public void onSensorChanged(SensorEvent arg0) { 
// TODO Auto-generated method stub 
int sensorType = arg0.sensor.getType(); 
float[] values = arg0.values; 
if (sensorType == Sensor.TYPE_ACCELEROMETER){ 
if (Math.abs(values[0]) > 14 || Math.abs(values[1]) > 14 || Math.abs(values[2]) > 14){ 
mVibrator.vibrate(100); 
TextView tv1 = (TextView)findViewById(R.id.textView1); 
SimpleDateFormat f=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss E"); 
tv1.setText(f.format(new Date()) + "手机摇动了..."); 
} 
} 
} 
@Override 
protected void onResume() { 
// TODO Auto-generated method stub 
super.onResume(); 
mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL); 
} 
@Override 
protected void onStop() { 
// TODO Auto-generated method stub 
mSensorManager.unregisterListener(this); 
super.onStop(); 
} 
@Override 
protected void onPause() { 
// TODO Auto-generated method stub 
mSensorManager.unregisterListener(this); 
super.onPause(); 
} 
}