侦测Android加速度传感器

ShakeListener.java

package com.example.AdmobTest;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.Log;
import android.widget.TextView;

import java.util.Random;

/**
 * Created with IntelliJ IDEA.
 * User: linxiangyu
 * Date: 13-3-11
 * Time: 下午7:24
 * To change this template use File | Settings | File Templates.
 */
public abstract  class ShakeListener implements SensorEventListener  {
    /**
     *
     * Usage:
     *   new ShakeListener(this){
     *     @Override
     *     void update() {
     *        Toast.makeText(MyActivity.this, "shake detected w/ speed: " + mSpeed, Toast.LENGTH_SHORT).show();
     *     }
     *    }.init();
     *
     */

    SensorManager mSensorMgr ;
    Context context;


    private int SHAKE_THRESHOLD = 6000;  //摇动力度
    private int LISTENER_TIME_GAP = 50; // 检测时间间隔，单位ms

    long lastUpdate,lastShakeTime = 0;
    float x,y,z, last_x = 0,last_y, last_z = 0;

    float mSpeed;

    protected ShakeListener(Context context) {
        this.context = context;
    }

    public void init(){
         //初始化SensorManager
         mSensorMgr = (SensorManager)context.getSystemService(Context.SENSOR_SERVICE);
         mSensorMgr.registerListener(this, mSensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_GAME);
    }

    public void init(int SENSOR_DELAY_TYPE){
        /**
         *  in SensorMananger class:
         *
         *  int	SENSOR_DELAY_FASTEST	get sensor data as fast as possible
         *  int	SENSOR_DELAY_GAME	    rate suitable for games
         *  int	SENSOR_DELAY_NORMAL  	rate (default) suitable for screen orientation changes
         *  int	SENSOR_DELAY_UI	        rate suitable for the user interface
         */
        mSensorMgr = (SensorManager)context.getSystemService(Context.SENSOR_SERVICE);
        mSensorMgr.registerListener(this, mSensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SENSOR_DELAY_TYPE);
    }






    @Override
    public void onSensorChanged(SensorEvent event) {
        float[] values = event.values;
        if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
            long curTime = System.currentTimeMillis();
            if ((curTime - lastUpdate) > LISTENER_TIME_GAP) {
                long diffTime = (curTime - lastUpdate);
                lastUpdate = curTime;

                x = values[SensorManager.DATA_X];
                y = values[SensorManager.DATA_Y];
                z = values[SensorManager.DATA_Z];

                //计算摇动的速度
                float speed = Math.abs(x+y+z - last_x - last_y - last_z) / diffTime * 10000;
                mSpeed = speed;

                if (speed > SHAKE_THRESHOLD) {
                    Log.d("sensor", "shake detected w/ speed: " + speed);
                    //	Toast.makeText(this, "shake detected w/ speed: " + speed, Toast.LENGTH_SHORT).show();
                    update();
                }
                last_x = x;
                last_y = y;
                last_z = z;
            }
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
    }

    abstract void update();

    public void setListenTimeGap(int LISTENER_TIME_GAP) {
        this.LISTENER_TIME_GAP = LISTENER_TIME_GAP;
    }

    public void setShakeThreshold(int SHAKE_THRESHOLD) {
        this.SHAKE_THRESHOLD = SHAKE_THRESHOLD;
    }


    public SensorManager getmSensorManager() {
        return mSensorMgr;
    }

}