Android(安卓)学习笔记8——传感器使用
16lz
2021-01-24
我大一时候买的安卓手机共有三个传感器,分别是:
3-AXIS ACCELEROMETER (三轴加速度计)
Proximity Sensor (接近度传感器)
Light Sensor (光线传感器)
在程序中使用的方法如下:
package com.example.test;import java.util.List;import android.app.Activity;import android.hardware.Sensor;import android.hardware.SensorEvent;import android.hardware.SensorEventListener;import android.hardware.SensorManager;import android.os.Bundle;import android.widget.TextView;public class MainActivity extends Activity {<span style="white-space:pre"></span>private SensorManager sm;private mylistener ml; protected void onCreate(Bundle savedInstanceState) { sm = (SensorManager)getSystemService(SENSOR_SERVICE); List<Sensor> kkk = sm.getSensorList(Sensor.TYPE_ALL); ml = new mylistener(); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TextView c = (TextView)(findViewById(R.id.view));String s = ""; for (int i = 0;i < kkk.size();++i) s += kkk.get(i).getName() + '\n'; c.setText(s); } @Override protected void onResume() {Sensor sensor_orientation=sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); sm.registerListener(ml,sensor_orientation, SensorManager.SENSOR_DELAY_NORMAL); super.onResume(); } @Override protected void onPause() { sm.unregisterListener(ml); super.onPause(); } private final class mylistener implements SensorEventListener { @Override public void onSensorChanged(SensorEvent event) { TextView cc = (TextView)(findViewById(R.id.view2));// TODO Auto-generated method stub if (event.sensor.getType()==Sensor.TYPE_ACCELEROMETER) { float x = event.values[0]; float y = event.values[1]; float z = event.values[2]; cc.setText("x: "+x+"\ny: "+y+"\nz: "+z); } } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { // TODO Auto-generated method stub } }}运行结果是显示所有的传感器名称,并显示加速度三个方向的分量。
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