android 傳感器使用的demo,包括光線傳感器,加速度傳感器,距離傳感器和方向傳感器。
demo:下載地址
源碼:
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,獲得SensorManager對象
//2,獲得想要的Sensor對象
//3,綁定監聽器
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);
//獲得傳感器管理器對象
sensorManager=(SensorManager)getSystemService(Context.SENSOR_SERVICE);
}
@Override
public void onClick(View v) {
if(v==findBut){
//獲取手機上所有傳感器的列表
List<Sensor> sensors=sensorManager.getSensorList(Sensor.TYPE_ALL);
for(Sensor sensor:sensors){
System.out.println(sensor.getName());
}
}else if(v==lightBut){
//得到默認的加速度傳感器
Sensor lightSensor=sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
//綁定監聽器(上下文接口,要監聽的傳感器,傳感器採樣率<時間間隔>),返回結果
Boolean res=sensorManager.registerListener(new LightSensorListener(),lightSensor,SensorManager.SENSOR_DELAY_NORMAL);
Toast.makeText(this,"綁定光線傳感器:"+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,"綁定加速度傳感器:"+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,"綁定方向傳感器:"+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,"綁定距離傳感器:"+res,Toast.LENGTH_LONG).show();
}
}
public class LightSensorListener implements SensorEventListener{
@Override
//傳感器的數據被打包成event,主要的檢測數據放在enent.values[]數組中
public void onSensorChanged(SensorEvent event) {
System.out.println(event.timestamp);//時間戳
System.out.println(event.sensor.getResolution());//分辨率(能識別出最小數值)
System.out.println(event.accuracy);//精度(等級)
System.out.println(event.values[0]);//光線強度
}
@Override
//傳感器精度變化時調用這個函數
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軸加速度,負方向爲正
//event.values[1]Y軸加速度,負方向爲正
//event.values[2]Z軸加速度,負方向爲正
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];
//通過以上公式可以拋去三個方向上的重力加速度,只剩下純加速度
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) {
//(需要手機屏幕向上,向下的話南北會反掉)設備繞Z軸旋轉,Y軸正方向與地磁北極方向的夾角,順時針方向爲正,範圍【0,180】
float azimuth=event.values[0];
//設備繞X軸旋轉的角度,當Z軸向Y軸正方向旋轉時爲正,反之爲負,範圍【-180,180】
float pitch=event.values[1];
//設備繞Y軸旋轉的角度,當Z軸向X軸正方向旋轉時爲負,反之爲正,範圍【-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) {
//距離傳感器測試手機屏幕距離別的物體的記錄,只有兩個值:0和5
//距離很近時爲0,否則爲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);
}
}
界面截圖:
PS:測試時每次選擇一種傳感器