标签:android sensoreventlistener sensormanager 摇一摇 加速度传感器
一、原理介绍:
Android手机中摇一摇的功能已经很常见了,最近接触到了这个功能,原理很简单:使用加速度传感器,在晃动手机时,监听加速度在各个方向的变化,当加速度值超过设定的灵敏度时,则触发摇一摇功能。
二、使用到的类:
三、功能实现:
1、摇一摇功能:我将摇一摇功能封装成了一个类ShakeUtils,在使用时按照注释中的说明使用即可,ShakeUtils.java如下(差的包请CTRL+SHIFT+O导入):
/** * 摇一摇工具类 * 使用说明: * private ShakeUtils mShakeUtils = null; * 1、在需要使用摇一摇功能的Activity实例化该工具类并设置摇一摇监听: * mShakeUtils = new ShakeUtils( this ); * mShakeUtils.setOnShakeListener(new OnShakeListener{ * public void onShake(){ * // 此处为摇一摇触发后的操作 * } * }); * * 2、分别在Activity的onResume和onPause方法中调用该工具类的onResume和onPause方法: * mShakeUtils.onResume(); * mShakeUtils.onPause(); * */ public class ShakeUtils implements SensorEventListener { public ShakeUtils( Context context ){ mSensorManager = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE); } public void setOnShakeListener( OnShakeListener onShakeListener ){ mOnShakeListener = onShakeListener; } public void onResume(){ mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL); } public void onPause(){ mSensorManager.unregisterListener(this); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } @Override public void onSensorChanged(SensorEvent event) { int sensorType = event.sensor.getType(); //values[0]:X轴,values[1]:Y轴,values[2]:Z轴 float[] values = event.values; if (sensorType == Sensor.TYPE_ACCELEROMETER){ //这里可以调节摇一摇的灵敏度 if ((Math.abs(values[0]) > SENSOR_VALUE || Math.abs(values[1]) > SENSOR_VALUE || Math.abs(values[2]) > SENSOR_VALUE)){ System.out.println("sensor value == " + " " + values[ 0 ] + " " + values[ 1 ] + " " + values[ 2 ] ); if( null != mOnShakeListener ){ mOnShakeListener.onShake( ); } } } } public interface OnShakeListener{ public void onShake(); } private SensorManager mSensorManager = null; private OnShakeListener mOnShakeListener = null; private static final int SENSOR_VALUE = 14; }
public abstract class BaseActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); init(); } private void init(){ setContentView( ); findViews( ); getData( ); showContent( ); } public abstract void setContentView(); public abstract void findViews(); public abstract void getData(); public abstract void showContent(); }
public class ShakeBeautyActivity extends BaseActivity { @Override public void setContentView() { setContentView( R.layout.activity_shake_beauty_layout ); } @Override public void findViews() { mShakeImageView = ( ImageView )findViewById( R.id.shakeImgId ); initShakeUtils( ); } @Override public void getData() { } @Override public void showContent() { } @Override protected void onResume() { super.onResume(); mShakeUtils.onResume( ); } @Override protected void onPause() { super.onPause(); mShakeUtils.onPause( ); } private void initShakeUtils(){ mShakeUtils = new ShakeUtils( this ); mShakeUtils.setOnShakeListener( new OnShakeListener( ) { @Override public void onShake() { setShakeImage( ); } }); } private void setShakeImage( ){ Random random = new Random( ); mShakeImageView.setBackgroundResource( mBeautys[ ( Math.abs(random.nextInt( ) ) )%mBeautys.length ] ); } private ImageView mShakeImageView = null; private ShakeUtils mShakeUtils = null; private static final int[] mBeautys = new int[]{ R.drawable.beauty_01 ,R.drawable.beauty_02 ,R.drawable.beauty_03 ,R.drawable.beauty_04 ,R.drawable.beauty_05 ,R.drawable.beauty_06 ,R.drawable.beauty_07 ,R.drawable.beauty_08 ,R.drawable.beauty_09 }; }
四、demo下载:
标签:android sensoreventlistener sensormanager 摇一摇 加速度传感器
原文地址:http://blog.csdn.net/ekeuy/article/details/39214379