Android实战简易教程<三十一>（基于加速度传感器的摇一摇功能实例）

下面我们来看一下微信摇一摇功能的模拟实现，我们是基于手机加速度传感器实现该功能，实现方法比较简单。 
MainActivity.java:

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">MainActivity.java:<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">package</span> com.location.activity;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.app.Activity;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.content.Context;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.hardware.Sensor;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.hardware.SensorEvent;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.hardware.SensorEventListener;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.hardware.SensorManager;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.os.Bundle;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.widget.Toast;<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">MainActivity</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">extends</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Activity</span> {</span>    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> SensorManager sensorManager;    <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onCreate</span>(Bundle savedInstanceState) {        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>.onCreate(savedInstanceState);        setContentView(R.layout.main);        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 获取服务</span>        Sensor sensor = sensorManager                .getDefaultSensor(Sensor.TYPE_ACCELEROMETER);<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 传感器种类-加速度传感器</span>        sensorManager.registerListener(listener, sensor,                SensorManager.SENSOR_DELAY_NORMAL);    }    <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onDestroy</span>() {        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (sensorManager != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {            sensorManager.unregisterListener(listener);        }        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>.onDestroy();    }    <span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/**     * 传感器触发     */</span>    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> SensorEventListener listener = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> SensorEventListener() {        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onSensorChanged</span>(SensorEvent event) {            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">float</span> xValue = Math.abs(event.values[<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>]);<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// X轴方向加速度</span>            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">float</span> yValue = Math.abs(event.values[<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span>]);<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Y轴方向加速度</span>            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">float</span> zValue = Math.abs(event.values[<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span>]);<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Z轴方向加速度</span>            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (xValue > <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">20</span> || yValue > <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">20</span> || zValue > <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">20</span>) {<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 有任何一个方向的加速度值大于20,即触发</span>                <span class="hljs-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/**                 * 这里我们只是以Toast为例，您可以按照自己的需求在此写入各种方法；                 */</span>                Toast.makeText(MainActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"您启动了摇一摇功能！"</span>,                        Toast.LENGTH_LONG).show();            }        }        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onAccuracyChanged</span>(Sensor sensor, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> accuracy) {        }    };}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; 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padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li><li style="box-sizing: border-box; padding: 0px 5px;">34</li><li style="box-sizing: border-box; padding: 0px 5px;">35</li><li style="box-sizing: border-box; padding: 0px 5px;">36</li><li style="box-sizing: border-box; padding: 0px 5px;">37</li><li style="box-sizing: border-box; padding: 0px 5px;">38</li><li style="box-sizing: border-box; padding: 0px 5px;">39</li><li style="box-sizing: border-box; padding: 0px 5px;">40</li><li style="box-sizing: border-box; padding: 0px 5px;">41</li><li style="box-sizing: border-box; padding: 0px 5px;">42</li><li style="box-sizing: border-box; padding: 0px 5px;">43</li><li style="box-sizing: border-box; padding: 0px 5px;">44</li><li style="box-sizing: border-box; padding: 0px 5px;">45</li><li style="box-sizing: border-box; padding: 0px 5px;">46</li><li style="box-sizing: border-box; padding: 0px 5px;">47</li><li style="box-sizing: border-box; padding: 0px 5px;">48</li><li style="box-sizing: border-box; padding: 0px 5px;">49</li><li style="box-sizing: border-box; padding: 0px 5px;">50</li><li style="box-sizing: border-box; padding: 0px 5px;">51</li><li style="box-sizing: border-box; padding: 0px 5px;">52</li><li style="box-sizing: border-box; padding: 0px 5px;">53</li><li style="box-sizing: border-box; padding: 0px 5px;">54</li><li style="box-sizing: border-box; padding: 0px 5px;">55</li><li style="box-sizing: border-box; padding: 0px 5px;">56</li><li style="box-sizing: border-box; padding: 0px 5px;">57</li><li style="box-sizing: border-box; padding: 0px 5px;">58</li><li style="box-sizing: border-box; padding: 0px 5px;">59</li><li style="box-sizing: border-box; padding: 0px 5px;">60</li></ul>

运行实例如下：

 
总结： 
1.getSystemService(Context.SENSOR_SERVICE);// 获取SensorManage对象； 
2.sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);// 获取传感器种类 
3.本文只是将摇一摇触发为Toast,有需要的可以直接修改方法即可。