仿微信摇一摇功能，android 重力感应开发

本实例主要使用了android的重力感应功能并配合动画效果实现，主要代码如下：

第一：ShakeActivity主类：

package com.android.shake;



import java.io.IOException;
import java.util.HashMap;
import android.app.Activity;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.os.Handler;
import android.os.Vibrator;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.SlidingDrawer;
import android.widget.SlidingDrawer.OnDrawerCloseListener;
import android.widget.SlidingDrawer.OnDrawerOpenListener;
import android.widget.Toast;

import com.android.shake.ShakeListener.OnShakeListener;

public class ShakeActivity extends Activity{
	
	ShakeListener mShakeListener = null;
	Vibrator mVibrator;
	private RelativeLayout mImgUp;
	private RelativeLayout mImgDn;
	private RelativeLayout mTitle;
	
	private SlidingDrawer mDrawer;
	private Button mDrawerBtn;
	private SoundPool sndPool;
	private HashMap soundPoolMap = new HashMap();

	@Override
	public void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);	
		setContentView(R.layout.shake_activity);
		//drawerSet ();//设置  drawer监听    切换 按钮的方向
		
		mVibrator = (Vibrator)getApplication().getSystemService(VIBRATOR_SERVICE);
		
		mImgUp = (RelativeLayout) findViewById(R.id.shakeImgUp);
		mImgDn = (RelativeLayout) findViewById(R.id.shakeImgDown);
		mTitle = (RelativeLayout) findViewById(R.id.shake_title_bar);
		
		mDrawer = (SlidingDrawer) findViewById(R.id.slidingDrawer1);
        mDrawerBtn = (Button) findViewById(R.id.handle);
        mDrawer.setOnDrawerOpenListener(new OnDrawerOpenListener()
		{	public void onDrawerOpened()
			{	
				mDrawerBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.shake_report_dragger_down));
				TranslateAnimation titleup = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,-1.0f);
				titleup.setDuration(200);
				titleup.setFillAfter(true);
				mTitle.startAnimation(titleup);
			}
		});
		 /* 设定SlidingDrawer被关闭的事件处理 */
		mDrawer.setOnDrawerCloseListener(new OnDrawerCloseListener()
		{	public void onDrawerClosed()
			{	
				mDrawerBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.shake_report_dragger_up));
				TranslateAnimation titledn = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,-1.0f,Animation.RELATIVE_TO_SELF,0f);
				titledn.setDuration(200);
				titledn.setFillAfter(false);
				mTitle.startAnimation(titledn);
			}
		});
		loadSound() ;
		mShakeListener = new ShakeListener(this);
        mShakeListener.setOnShakeListener(new OnShakeListener() {
			public void onShake() {
				//Toast.makeText(getApplicationContext(), "抱歉，暂时没有找到在同一时刻摇一摇的人。\n再试一次吧！", Toast.LENGTH_SHORT).show();
				startAnim();  //开始 摇一摇手掌动画
				mShakeListener.stop();
				sndPool.play(soundPoolMap.get(0), (float) 1, (float) 1, 0, 0,(float) 1.2);
				new Handler().postDelayed(new Runnable(){
					public void run(){
						//Toast.makeText(getApplicationContext(), "抱歉，暂时没有找到\n在同一时刻摇一摇的人。\n再试一次吧！", 500).setGravity(Gravity.CENTER,0,0).show();
						sndPool.play(soundPoolMap.get(1), (float) 1, (float) 1, 0, 0,(float) 1.0);
						Toast mtoast;
						mtoast = Toast.makeText(getApplicationContext(),
							     "抱歉，暂时没有找到\n在同一时刻摇一摇的人。\n再试一次吧！", 10);
							   //mtoast.setGravity(Gravity.CENTER, 0, 0);
							   mtoast.show();
							   mVibrator.cancel();
							   mShakeListener.start();
							   
					}
				}, 2000);
			}
		});
   }
	
	
	
	private void loadSound() {

		sndPool = new SoundPool(2, AudioManager.STREAM_SYSTEM, 5);
		new Thread() {
			public void run() {
				try {
					soundPoolMap.put(
							0,
							sndPool.load(getAssets().openFd(
											"sound/shake_sound_male.mp3"), 1));

					soundPoolMap.put(
							1,
							sndPool.load(getAssets().openFd(
											"sound/shake_match.mp3"), 1));
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}.start();
	}
	
	public void startAnim () {   //定义摇一摇动画动画
		AnimationSet animup = new AnimationSet(true);
		TranslateAnimation mytranslateanimup0 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,-0.5f);
		mytranslateanimup0.setDuration(1000);
		TranslateAnimation mytranslateanimup1 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,+0.5f);
		mytranslateanimup1.setDuration(1000);
		mytranslateanimup1.setStartOffset(1000);
		animup.addAnimation(mytranslateanimup0);
		animup.addAnimation(mytranslateanimup1);
		mImgUp.startAnimation(animup);
		
		AnimationSet animdn = new AnimationSet(true);
		TranslateAnimation mytranslateanimdn0 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,+0.5f);
		mytranslateanimdn0.setDuration(1000);
		TranslateAnimation mytranslateanimdn1 = new TranslateAnimation(Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,0f,Animation.RELATIVE_TO_SELF,-0.5f);
		mytranslateanimdn1.setDuration(1000);
		mytranslateanimdn1.setStartOffset(1000);
		animdn.addAnimation(mytranslateanimdn0);
		animdn.addAnimation(mytranslateanimdn1);
		mImgDn.startAnimation(animdn);	
	}
	public void startVibrato(){		//定义震动
		mVibrator.vibrate( new long[]{500,200,500,200}, -1); //第一个｛｝里面是节奏数组， 第二个参数是重复次数，-1为不重复，非-1俄日从pattern的指定下标开始重复
	}
	
	public void shake_activity_back(View v) {     //标题栏 返回按钮
      	this.finish();
      }  
	public void linshi(View v) {     //标题栏
		startAnim();
      }  
	@Override
	protected void onDestroy() {
		super.onDestroy();
		if (mShakeListener != null) {
			mShakeListener.stop();
		}
	}
}

 第二：一个检测手机摇晃的监听器类ShakeListener ，代码如下：

package com.android.shake;

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

/**
 * 一个检测手机摇晃的监听器
 */
public class ShakeListener implements SensorEventListener {
	// 速度阈值，当摇晃速度达到这值后产生作用
	private static final int SPEED_SHRESHOLD = 2000;
	// 两次检测的时间间隔
	private static final int UPTATE_INTERVAL_TIME = 70;
	// 传感器管理器
	private SensorManager sensorManager;
	// 传感器
	private Sensor sensor;
	// 重力感应监听器
	private OnShakeListener onShakeListener;
	// 上下文
	private Context mContext;
	// 手机上一个位置时重力感应坐标
	private float lastX;
	private float lastY;
	private float lastZ;
	// 上次检测时间
	private long lastUpdateTime;

	// 构造器
	public ShakeListener(Context c) {
		// 获得监听对象
		mContext = c;
		start();
	}

	// 开始
	public void start() {
		// 获得传感器管理器
		sensorManager = (SensorManager) mContext
				.getSystemService(Context.SENSOR_SERVICE);
		if (sensorManager != null) {
			// 获得重力传感器
			sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
		}
		// 注册
		if (sensor != null) {
			sensorManager.registerListener(this, sensor,
					SensorManager.SENSOR_DELAY_GAME);
		}

	}

	// 停止检测
	public void stop() {
		sensorManager.unregisterListener(this);
	}

	// 设置重力感应监听器
	public void setOnShakeListener(OnShakeListener listener) {
		onShakeListener = listener;
	}

	// 重力感应器感应获得变化数据
	public void onSensorChanged(SensorEvent event) {
		// 现在检测时间
		long currentUpdateTime = System.currentTimeMillis();
		// 两次检测的时间间隔
		long timeInterval = currentUpdateTime - lastUpdateTime;
		// 判断是否达到了检测时间间隔
		if (timeInterval < UPTATE_INTERVAL_TIME)
			return;
		// 现在的时间变成last时间
		lastUpdateTime = currentUpdateTime;

		// 获得x,y,z坐标
		float x = event.values[0];
		float y = event.values[1];
		float z = event.values[2];

		// 获得x,y,z的变化值
		float deltaX = x - lastX;
		float deltaY = y - lastY;
		float deltaZ = z - lastZ;

		// 将现在的坐标变成last坐标
		lastX = x;
		lastY = y;
		lastZ = z;

		double speed = Math.sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ
				* deltaZ)
				/ timeInterval * 10000;
		// 达到速度阀值，发出提示
		if (speed >= SPEED_SHRESHOLD) {
			onShakeListener.onShake();
		}
	}

	public void onAccuracyChanged(Sensor sensor, int accuracy) {

	}

	// 摇晃监听接口
	public interface OnShakeListener {
		public void onShake();
	}

}

 第三：必须在AndroidManifest.xml中添加权限，否侧摇动时不能监听

第四：效果图：

 项目代码在下面附件