1. 光照传感器

activity_main.xml

MainActivity.java

package liqing.lightsensortest;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.support.v7.app.AppCompatActivity;import android.widget.TextView;public class MainActivity extends AppCompatActivity {    private SensorManager sensorManager;    private TextView lightLevel;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lightLevel = (TextView) findViewById(R.id.light_level);        //获取系统传感器的管理器        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);        //得到 光照传感器        Sensor sensor = sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);        // 光照传感器注册(register)监听,参数为(SensorEventListener实例,传感器对象,输出信息速率)        sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_NORMAL);    }    private SensorEventListener listener = new SensorEventListener() {        @Override        public void onSensorChanged(SensorEvent event) {            float value = event.values[0];            lightLevel.setText("Current light level is " + value + " lx ");        }        @Override        public void onAccuracyChanged(Sensor sensor, int accuracy) {        }    };    @Override    protected void onDestroy() {        super.onDestroy();        if (sensorManager != null) {            //注销监听            sensorManager.unregisterListener(listener);        }    }}

2. 加速器传感器(摇一摇)

activity_main.xml

MainActivity.java

public class MainActivity extends AppCompatActivity {    private SensorManager sensorManager;    private TextView lightLevel;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lightLevel = (TextView) findViewById(R.id.light_level);        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);        //得到 accelerometer(加速器)传感器        Sensor sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);        sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_NORMAL);    }    private SensorEventListener listener = new SensorEventListener() {        @Override        public void onSensorChanged(SensorEvent event) {            //方向传感器SensorEvent的取值有X轴,Y轴,Z轴,去绝对值Math.abs()            float x = Math.abs(event.values[0]);            float y = Math.abs(event.values[1]);            float z = Math.abs(event.values[2]);            if (x > 15 || y > 15 || z > 15) {                lightLevel.setText("摇一摇 ");            }        }        @Override        public void onAccuracyChanged(Sensor sensor, int accuracy) {        }    };    @Override    protected void onDestroy() {        super.onDestroy();        if (sensorManager != null) {            //注销监听            sensorManager.unregisterListener(listener);        }    }}

3.方向传感器(赛车游戏控制方向) 使用加速传感器和地磁传感器,通过getRotationMatrix()和getOrientation()得到XYZ旋转值

main_activity.xml

MainActivity.java

package liqing.lightsensortest;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.support.v7.app.AppCompatActivity;import android.widget.TextView;public class MainActivity extends AppCompatActivity {    private SensorManager sensorManager;    private TextView textView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        textView = (TextView) findViewById(R.id.light_level);        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);        //得到 accelerometer(加速器)传感器        Sensor accelerometerSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);        //带到 magnetic_FIELD(地磁的_领域)传感器        Sensor magneticSensor = sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);        //注意(SENSOR_DELAY_GAME)传感器的速率改变的相当快        sensorManager.registerListener(listener, accelerometerSensor, SensorManager.SENSOR_DELAY_GAME);        sensorManager.registerListener(listener, magneticSensor, SensorManager.SENSOR_DELAY_GAME);    }    private SensorEventListener listener = new SensorEventListener() {        float[] accelerometerValues = new float[3];        float[] magneticValues = new float[3];        @Override        public void onSensorChanged(SensorEvent event) {            //注意SensorEvent是所以传感器的信息(包括类型和值)            switch (event.sensor.getType()) {                case Sensor.TYPE_ACCELEROMETER:                    //clone()克隆                    accelerometerValues = event.values.clone();                    break;                case Sensor.TYPE_MAGNETIC_FIELD:                    //clone()克隆                    magneticValues = event.values.clone();                    break;                default:                    break;            }            float[] R = new float[9];//矩阵的值            float[] values = new float[3];//X,Y,Z旋转的值            //getRotationMatrix(得到旋转矩阵)            SensorManager.getRotationMatrix(R, null, accelerometerValues, magneticValues);            //getOrientation(得到选中的值)            SensorManager.getOrientation(R, values);            textView.setText(                    "X=" + values[0] + "\n"                     + "Y=" + values[1] + "\n"                     + "Z=" + values[2] + "\n");        }        @Override        public void onAccuracyChanged(Sensor sensor, int accuracy) {        }    };    @Override    protected void onDestroy() {        super.onDestroy();        if (sensorManager != null) {            //注销监听            sensorManager.unregisterListener(listener);        }    }}