android sensor传感器

最新推荐文章于 2023-11-28 15:52:14 发布

原创最新推荐文章于 2023-11-28 15:52:14 发布 · 147 阅读

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#sensor传感器 #sensor

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本文介绍如何在Android应用中实现手机摇动事件的监听，并通过特定的逻辑触发相应的行为，包括改变应用状态和振动反馈。

MainActivity.java


package com.sensor;

import com.sensor.ShakeListener.OnShakeListener;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

	private ShakeListener shakeListener;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        shakeListener=new ShakeListener(this);
        shakeListener.setOnShakeListener(new Shake());
    }

    class Shake implements OnShakeListener{

		@Override
		public void onShake() {
			// TODO Auto-generated method stub
			setTitle("正在摇动了手机");
		}

    }



    @Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		shakeListener.start();
	}


	@Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		shakeListener.stop();
	}


	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		shakeListener.stop();
	}


	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

ShakeListener.java


package com.sensor;

import android.app.Service;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Vibrator;

public class ShakeListener implements SensorEventListener {
	private static final int SPEED_SHRESHOLD=3000;
	private static final int UPDATE_INTERVAL_TIME=78;
	private SensorManager sensorManager;
	private Sensor sensor;
	private Vibrator vibrator;
	private OnShakeListener onShakeListener;

	private Context context;

	private float lastx;
	private float lasty;
	private float lastz;

	private long lastUpdateTime;



	public ShakeListener(Context context) {
		super();
		this.context = context;
		start();
	}

	public void start() {
		// TODO Auto-generated method stub
		sensorManager=(SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
		vibrator=(Vibrator) context.getSystemService(Service.VIBRATOR_SERVICE);
		if(sensorManager!=null){
			sensor=sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
		}
		if(sensor!=null){
			sensorManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_GAME);
		}
	}

	public void stop() {
		// TODO Auto-generated method stub
		sensorManager.unregisterListener(this);
	}

	public void setOnShakeListener(OnShakeListener listener){
		onShakeListener=listener;
	}

	public interface OnShakeListener{
		public void onShake();
	}



	@Override
	public void onSensorChanged(SensorEvent event) {
		// TODO Auto-generated method stub
		long currentUpdateTime=System.currentTimeMillis();
		long timeInterval=currentUpdateTime-lastUpdateTime;
		if(timeInterval<UPDATE_INTERVAL_TIME){
			return;
		}
		lastUpdateTime=currentUpdateTime;

		float x=event.values[0];
		float y=event.values[1];
		float z=event.values[2];

		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*10000;
		if(speed>=SPEED_SHRESHOLD){
			onShakeListener.onShake();
			vibrator.vibrate(1000);
		}
	}

	private boolean coordinate(Float x,Float y,Float z){
		if((x>10&&y>10)||(x>10&&z>10)||(y>10&&z>10)){
			return true;
		}else{
			return false;
		}
	}

	@Override
	public void onAccuracyChanged(Sensor sensor, int accuracy) {
		// TODO Auto-generated method stub
		vibrator.vibrate(0);
	}

}

manifest.xml


    <uses-permission android:name="android.permission.VIBRATE"/>