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:
1、在AndroidManifest.xml中添加操作权限
2、实现代码
packagecom.xs.test; importandroid.app.Activity; importandroid.hardware.Sensor; importandroid.hardware.SensorEvent; importandroid.hardware.SensorEventListener; importandroid.hardware.SensorManager; importandroid.os.Bundle; importandroid.os.Handler; importandroid.os.Message; importandroid.os.Vibrator; importandroid.util.Log; importandroid.widget.Toast; /** *安卓晃动手机监听--“摇一摇” * *@author单红宇 * */ publicclassTestSensorActivityextendsActivity{ privateSensorManagersensorManager; privateVibratorvibrator; privatestaticfinalStringTAG="TestSensorActivity"; privatestaticfinalintSENSOR_SHAKE=10; /**Calledwhentheactivityisfirstcreated.*/ @Override publicvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main); sensorManager=(SensorManager)getSystemService(SENSOR_SERVICE); vibrator=(Vibrator)getSystemService(VIBRATOR_SERVICE); } @Override protectedvoidonResume(){ 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 protectedvoidonPause(){ super.onPause(); if(sensorManager!=null){//取消监听器 sensorManager.unregisterListener(sensorEventListener); } } /** *重力感应监听 */ privateSensorEventListenersensorEventListener=newSensorEventListener(){ @Override publicvoidonSensorChanged(SensorEventevent){ //传感器信息改变时执行该方法 float[]values=event.values; floatx=values[0];//x轴方向的重力加速度,向右为正 floaty=values[1];//y轴方向的重力加速度,向前为正 floatz=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。 intmedumValue=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); Messagemsg=newMessage(); msg.what=SENSOR_SHAKE; handler.sendMessage(msg); } } @Override publicvoidonAccuracyChanged(Sensorsensor,intaccuracy){ } }; /** *动作执行 */ Handlerhandler=newHandler(){ @Override publicvoidhandleMessage(Messagemsg){ super.handleMessage(msg); switch(msg.what){ caseSENSOR_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
packagecom.example.url; importjava.io.IOException; importjava.net.URL; importcom.hahashijie.imageload.ImageLoader; importandroid.annotation.SuppressLint; importandroid.app.Activity; importandroid.graphics.Bitmap; importandroid.graphics.BitmapFactory; importandroid.graphics.drawable.Drawable; importandroid.hardware.Sensor; importandroid.hardware.SensorEvent; importandroid.hardware.SensorEventListener; importandroid.hardware.SensorManager; importandroid.os.Bundle; importandroid.os.Handler; importandroid.os.Message; importandroid.os.Vibrator; importandroid.util.Log; importandroid.widget.ImageView; @SuppressLint("HandlerLeak") publicclassMainActivityextendsActivity{ privateImageViewimage; privateSensorManagersensorManager; privateSensorsensor; privateVibratorvibrator; privatestaticfinalintUPTATE_INTERVAL_TIME=50; privatestaticfinalintSPEED_SHRESHOLD=30;//这个值调节灵敏度 privatelonglastUpdateTime; privatefloatlastX; privatefloatlastY; privatefloatlastZ; @Override protectedvoidonCreate(BundlesavedInstanceState){ 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 protectedvoidonResume(){ //TODOAuto-generatedmethodstub 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 */ privateSensorEventListenersensorEventListener=newSensorEventListener(){ @Override publicvoidonSensorChanged(SensorEventevent){ longcurrentUpdateTime=System.currentTimeMillis(); longtimeInterval=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; floatx=values[0];//x轴方向的重力加速度,向右为正 floaty=values[1];//y轴方向的重力加速度,向前为正 floatz=values[2];//z轴方向的重力加速度,向上为正 floatdeltaX=x-lastX; floatdeltaY=y-lastY; floatdeltaZ=z-lastZ; lastX=x; lastY=y; lastZ=z; doublespeed=(Math.sqrt(deltaX*deltaX+deltaY*deltaY +deltaZ*deltaZ)/timeInterval)*100; if(speed>=SPEED_SHRESHOLD){ vibrator.vibrate(300); image.setImageResource(R.drawable.running01); } } @Override publicvoidonAccuracyChanged(Sensorsensor,intaccuracy){ } }; }
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毛票票。