在android中手机传感器如何调用

package com.bobo.study.study_5_1; import android.app.Activity; import android.content.Context; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import java.util.List; //1,获得SensorManager对象 //2,获得想要的Sensor对象 //3,绑定监听器 public class MainActivity extends Activity implements View.OnClickListener{ Button findBut,accelerationBut,lightBut,orientationBut,proximityBut; SensorManager sensorManager; TextView text,accText,luxText; float gravity[]=new float[3]; float linear_acceleration[]=new float[3]; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findBut=(Button)findViewById(R.id.findBut); findBut.setOnClickListener(this); lightBut=(Button)findViewById(R.id.lightBut); lightBut.setOnClickListener(this); accelerationBut=(Button)findViewById(R.id.accelerationBut); accelerationBut.setOnClickListener(this); orientationBut=(Button)findViewById(R.id.orientationBut); orientationBut.setOnClickListener(this); proximityBut=(Button)findViewById(R.id.proximityBut); proximityBut.setOnClickListener(this); text=(TextView)findViewById(R.id.text); accText=(TextView)findViewById(R.id.accText); luxText=(TextView)findViewById(R.id.luxText); //获得传感器管理器对象 sensorManager=(SensorManager)getSystemService(Context.SENSOR_SERVICE); } @Override public void onClick(View v) { if(v==findBut){ //获取手机上所有传感器的列表 List<Sensor> sensors=sensorManager.getSensorList(Sensor.TYPE_ALL); for(Sensor sensor:sensors){ System.out.println(sensor.getName()); } }else if(v==lightBut){ //得到默认的加速度传感器 Sensor lightSensor=sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT); //绑定监听器（上下文接口，要监听的传感器，传感器采样率<时间间隔>）,返回结果 Boolean res=sensorManager.registerListener(new LightSensorListener(),lightSensor,SensorManager.SENSOR_DELAY_NORMAL); Toast.makeText(this,"绑定光线传感器："+res,Toast.LENGTH_LONG).show(); } else if(v==accelerationBut){ Sensor accelerometerSensor=sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); Boolean res=sensorManager.registerListener(new AccerationSensorListener(),accelerometerSensor,SensorManager.SENSOR_DELAY_NORMAL); Toast.makeText(this,"绑定加速度传感器："+res,Toast.LENGTH_LONG).show(); }else if(v==orientationBut){ Sensor orientationSensor=sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION); Boolean res=sensorManager.registerListener(new OrientaationListener(),orientationSensor,SensorManager.SENSOR_DELAY_NORMAL); Toast.makeText(this,"绑定方向传感器："+res,Toast.LENGTH_LONG).show(); } else if(v==proximityBut){ Sensor proximitySensor=sensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY); Boolean res=sensorManager.registerListener(new ProximityListener(),proximitySensor,SensorManager.SENSOR_DELAY_NORMAL); Toast.makeText(this,"绑定距离传感器："+res,Toast.LENGTH_LONG).show(); } } public class LightSensorListener implements SensorEventListener{ @Override //传感器的数据被打包成event，主要的检测数据放在enent.values[]数组中 public void onSensorChanged(SensorEvent event) { System.out.println(event.timestamp);//时间戳 System.out.println(event.sensor.getResolution());//分辨率（能识别出最小数值） System.out.println(event.accuracy);//精度（等级） System.out.println(event.values[0]);//光线强度 } @Override //传感器精度变化时调用这个函数 public void onAccuracyChanged(Sensor sensor, int accuracy) {} } public class AccerationSensorListener implements SensorEventListener{ @Override public void onSensorChanged(SensorEvent event) { final float alpha=0.8f; //event.values[0]X轴加速度，负方向为正 //event.values[1]Y轴加速度，负方向为正 //event.values[2]Z轴加速度，负方向为正 gravity[0]=alpha*gravity[0]+(1-alpha)*event.values[0]; gravity[1]=alpha*gravity[1]+(1-alpha)*event.values[1]; gravity[2]=alpha*gravity[2]+(1-alpha)*event.values[2]; linear_acceleration[0]=event.values[0]-gravity[0]; linear_acceleration[1]=event.values[1]-gravity[1]; linear_acceleration[2]=event.values[2]-gravity[2]; //通过以上公式可以抛去三个方向上的重力加速度，只剩下纯加速度 text.setText(linear_acceleration[0] + ""); accText.setText(linear_acceleration[1] + ""); luxText.setText(linear_acceleration[2] + ""); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) {} } public class OrientaationListener implements SensorEventListener{ @Override public void onSensorChanged(SensorEvent event) { //（需要手机屏幕向上，向下的话南北会反掉）设备绕Z轴旋转，Y轴正方向与地磁北极方向的夹角，顺时针方向为正，范围【0，180】 float azimuth=event.values[0]; //设备绕X轴旋转的角度，当Z轴向Y轴正方向旋转时为正，反之为负，范围【-180,180】 float pitch=event.values[1]; //设备绕Y轴旋转的角度，当Z轴向X轴正方向旋转时为负，反之为正，范围【-90,90】 float roll=event.values[2]; text.setText(azimuth+""); accText.setText(pitch +""); luxText.setText(roll+""); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) {} } public class ProximityListener implements SensorEventListener{ @Override public void onSensorChanged(SensorEvent event) { //距离传感器测试手机屏幕距离别的物体的记录，只有两个值：0和5 //距离很近时为0，否则为5 System.out.println(event.values[0]+""); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) {} } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }

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