android 实现摇一摇功能，android实现摇功能,实现“摇一摇”功能，其实

android 实现摇一摇功能，android实现摇功能,实现“摇一摇”功能，其实

实现“摇一摇”功能，其实很简单，就是检测手机的重力感应，具体实现代码如下：一、在AndroidManifest.xml中添加操作权限二、实现代码```java package com.xs.test;

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.Handler;
import android.os.Message;
import android.os.Vibrator;
import android.util.Log;
import android.widget.Toast;

/ * 安卓晃动手机监听--“摇一摇”
* @author 单红宇
*/
public class TestSensorActivity extends Activity {

private SensorManager sensorManager;  private Vibrator vibrator;private static final String TAG = "TestSensorActivity";  private static final int SENSOR_SHAKE = 10;/** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      setContentView(R.layout.main);      sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);      vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);  }@Override  protected void onResume() {      super.onResume();      if (sensorManager != null) {// 注册监听器          sensorManager.registerListener(sensorEventListener, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.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 onPause() {      super.onPause();      if (sensorManager != null) {// 取消监听器          sensorManager.unregisterListener(sensorEventListener);      }  }/**  * 重力感应监听  */  private SensorEventListener sensorEventListener = new SensorEventListener() {    @Override      public void onSensorChanged(SensorEvent event) {          // 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          Log.i(TAG, "x轴方向的重力加速度" + x +  "；y轴方向的重力加速度" + y +  "；z轴方向的重力加速度" + z);          // 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。          int medumValue = 19;// 三星 i9250怎么晃都不会超过20，没办法，只设置19了          if (Math.abs(x) > medumValue || Math.abs(y) > medumValue || Math.abs(z) > medumValue) {              vibrator.vibrate(200);              Message msg = new Message();              msg.what = SENSOR_SHAKE;              handler.sendMessage(msg);          }      }    @Override      public void onAccuracyChanged(Sensor sensor, int accuracy) {    }  };/**  * 动作执行  */  Handler handler = new Handler() {    @Override      public void handleMessage(Message msg) {          super.handleMessage(msg);          switch (msg.what) {          case SENSOR_SHAKE:              Toast.makeText(TestSensorActivity.this, "检测到摇晃，执行操作！", Toast.LENGTH_SHORT).show();              Log.i(TAG, "检测到摇晃，执行操作！");              break;          }      }};

}
这种摇一摇比较普通，没有经过算法的加强，重力加速度就是10。算法优化如下package com.example.url;

import java.io.IOException;import java.net.URL;

import com.hahashijie.imageload.ImageLoader;

import android.annotation.SuppressLint;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.drawable.Drawable;import android.hardware.Sensor;import android.hardware.SensorEvent;import android.hardware.SensorEventListener;import android.hardware.SensorManager;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.os.Vibrator;import android.util.Log;import android.widget.ImageView;

@SuppressLint("HandlerLeak")public class MainActivity extends Activity {

private ImageView image;private SensorManager sensorManager;private Sensor sensor;private Vibrator vibrator;private static final int UPTATE_INTERVAL_TIME = 50;private static final int SPEED_SHRESHOLD = 30;//这个值调节灵敏度private long lastUpdateTime;private float lastX;private float lastY;private float lastZ;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);image = (ImageView) findViewById(R.id.image);

}

@Overrideprotected void onResume() {// TODO Auto-generated method stubsuper.onResume();if (sensorManager != null) { sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); } if (sensor != null) { sensorManager.registerListener(sensorEventListener, sensor,SensorManager.SENSOR_DELAY_GAME);//这里选择感应频率 }}

/ 重力感应监听/private SensorEventListener sensorEventListener = new SensorEventListener() {

@Overridepublic void onSensorChanged(SensorEvent event) {long currentUpdateTime = System.currentTimeMillis();long timeInterval = currentUpdateTime - lastUpdateTime;if (timeInterval < UPTATE_INTERVAL_TIME) {return;}lastUpdateTime = currentUpdateTime;// 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float deltaX = x - lastX;float deltaY = y - lastY;float deltaZ = z - lastZ;

lastX = x;lastY = y;lastZ = z;double speed = (Math.sqrt(deltaX * deltaX + deltaY * deltaY+ deltaZ * deltaZ) / timeInterval) * 100;if (speed >= SPEED_SHRESHOLD) {vibrator.vibrate(300);image.setImageResource(R.drawable.running01);}}

@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {

}};

}```