android 实现摇一摇功能

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

  1 package com.xs.test;  
  2    
  3 import android.app.Activity;  
  4 import android.hardware.Sensor;  
  5 import android.hardware.SensorEvent;  
  6 import android.hardware.SensorEventListener;  
  7 import android.hardware.SensorManager;  
  8 import android.os.Bundle;  
  9 import android.os.Handler;  
 10 import android.os.Message;  
 11 import android.os.Vibrator;  
 12 import android.util.Log;  
 13 import android.widget.Toast;  
 14    
 15 /** 
 16  * 安卓晃动手机监听--“摇一摇” 
 17  *  
 18  * @author 单红宇 
 19  *  
 20  */ 
 21 public class TestSensorActivity extends Activity {  
 22    
 23     private SensorManager sensorManager;  
 24     private Vibrator vibrator;  
 25    
 26     private static final String TAG = "TestSensorActivity";  
 27     private static final int SENSOR_SHAKE = 10;  
 28    
 29     /** Called when the activity is first created. */ 
 30     @Override 
 31     public void onCreate(Bundle savedInstanceState) {  
 32         super.onCreate(savedInstanceState);  
 33         setContentView(R.layout.main);  
 34         sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);  
 35         vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);  
 36     }  
 37    
 38     @Override 
 39     protected void onResume() {  
 40         super.onResume();  
 41         if (sensorManager != null) {// 注册监听器  
 42             sensorManager.registerListener(sensorEventListener, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);  
 43             // 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  
 44         }  
 45     }  
 46    
 47     @Override 
 48     protected void onPause() {  
 49         super.onPause();  
 50         if (sensorManager != null) {// 取消监听器  
 51             sensorManager.unregisterListener(sensorEventListener);  
 52         }  
 53     }  
 54    
 55     /** 
 56      * 重力感应监听 
 57      */ 
 58     private SensorEventListener sensorEventListener = new SensorEventListener() {  
 59    
 60         @Override 
 61         public void onSensorChanged(SensorEvent event) {  
 62             // 传感器信息改变时执行该方法  
 63             float[] values = event.values;  
 64             float x = values[0]; // x轴方向的重力加速度,向右为正  
 65             float y = values[1]; // y轴方向的重力加速度,向前为正  
 66             float z = values[2]; // z轴方向的重力加速度,向上为正  
 67             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);  
 68             // 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。  
 69             int medumValue = 19;// 三星 i9250怎么晃都不会超过20,没办法,只设置19了  
 70             if (Math.abs(x) > medumValue || Math.abs(y) > medumValue || Math.abs(z) > medumValue) {  
 71                 vibrator.vibrate(200);  
 72                 Message msg = new Message();  
 73                 msg.what = SENSOR_SHAKE;  
 74                 handler.sendMessage(msg);  
 75             }  
 76         }  
 77    
 78         @Override 
 79         public void onAccuracyChanged(Sensor sensor, int accuracy) {  
 80    
 81         }  
 82     };  
 83    
 84     /** 
 85      * 动作执行 
 86      */ 
 87     Handler handler = new Handler() {  
 88    
 89         @Override 
 90         public void handleMessage(Message msg) {  
 91             super.handleMessage(msg);  
 92             switch (msg.what) {  
 93             case SENSOR_SHAKE:  
 94                 Toast.makeText(TestSensorActivity.this, "检测到摇晃,执行操作!", Toast.LENGTH_SHORT).show();  
 95                 Log.i(TAG, "检测到摇晃,执行操作!");  
 96                 break;  
 97             }  
 98         }  
 99    
100     };  
101 }  
102 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。
103 算法优化如下
104 package com.example.url;
105  
106  
107 import java.io.IOException;
108 import java.net.URL;
109  
110  
111 import com.hahashijie.imageload.ImageLoader;
112  
113  
114 import android.annotation.SuppressLint;
115 import android.app.Activity;
116 import android.graphics.Bitmap;
117 import android.graphics.BitmapFactory;
118 import android.graphics.drawable.Drawable;
119 import android.hardware.Sensor;
120 import android.hardware.SensorEvent;
121 import android.hardware.SensorEventListener;
122 import android.hardware.SensorManager;
123 import android.os.Bundle;
124 import android.os.Handler;
125 import android.os.Message;
126 import android.os.Vibrator;
127 import android.util.Log;
128 import android.widget.ImageView;
129  
130  
131 @SuppressLint("HandlerLeak")
132 public class MainActivity extends Activity {
133  
134  
135 private ImageView image;
136 private SensorManager sensorManager;
137 private Sensor sensor;
138 private Vibrator vibrator;
139 private static final int UPTATE_INTERVAL_TIME = 50;
140 private static final int SPEED_SHRESHOLD = 30;//这个值调节灵敏度
141 private long lastUpdateTime;
142 private float lastX;
143 private float lastY;
144 private float lastZ;
145 @Override
146 protected void onCreate(Bundle savedInstanceState) {
147 super.onCreate(savedInstanceState);
148 setContentView(R.layout.activity_main);
149 sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
150 vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
151 image = (ImageView) findViewById(R.id.image);
152  
153  
154 }
155  
156  
157 @Override
158 protected void onResume() {
159 // TODO Auto-generated method stub
160 super.onResume();
161 if (sensorManager != null) {
162            sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
163        }
164        if (sensor != null) {
165         sensorManager.registerListener(sensorEventListener,
166         sensor,
167 SensorManager.SENSOR_DELAY_GAME);//这里选择感应频率
168        }
169 }
170  
171  
172 /**
173 * 重力感应监听
174 */
175 private SensorEventListener sensorEventListener = new SensorEventListener() {
176  
177  
178 @Override
179 public void onSensorChanged(SensorEvent event) {
180 long currentUpdateTime = System.currentTimeMillis();
181 long timeInterval = currentUpdateTime - lastUpdateTime;
182 if (timeInterval < UPTATE_INTERVAL_TIME) {
183 return;
184 }
185 lastUpdateTime = currentUpdateTime;
186 // 传感器信息改变时执行该方法
187 float[] values = event.values;
188 float x = values[0]; // x轴方向的重力加速度,向右为正
189 float y = values[1]; // y轴方向的重力加速度,向前为正
190 float z = values[2]; // z轴方向的重力加速度,向上为正
191 float deltaX = x - lastX;
192 float deltaY = y - lastY;
193 float deltaZ = z - lastZ;
194  
195  
196 lastX = x;
197 lastY = y;
198 lastZ = z;
199 double speed = (Math.sqrt(deltaX * deltaX + deltaY * deltaY
200 + deltaZ * deltaZ) / timeInterval) * 100;
201 if (speed >= SPEED_SHRESHOLD) {
202 vibrator.vibrate(300);
203 image.setImageResource(R.drawable.running01);
204 }
205 }
206  
207  
208 @Override
209 public void onAccuracyChanged(Sensor sensor, int accuracy) {
210  
211 }
212 };
213  
214 }

 

posted @ 2016-05-30 16:49  魔流剑  阅读(11030)  评论(1编辑  收藏  举报