Android实现摇一摇功能
程序员文章站
2024-03-02 21:03:10
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:
1、在 androidmanifest.xml 中添加操作权限
2、实现代码...
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:
1、在 androidmanifest.xml 中添加操作权限
2、实现代码
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; @override protected 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); } @override protected void onresume() { // todo auto-generated method stub super.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() { @override public 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); } } @override public void onaccuracychanged(sensor sensor, int accuracy) { } }; }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。