Android利用Sensor实现传感器功能

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.g150825_android29.MainActivity">


    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/znz"
        android:id="@+id/iv_image"
        />I

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:id="@+id/tv_main_result"
        />
</RelativeLayout>

package com.example.g150825_android29;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    private SensorManager sensorManager;
    private Sensor sensorOri;
    private TextView tv_main_result;
    private MyListener myListener;
    private ImageView iv_image;
    private float current=0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv_main_result = (TextView) findViewById(R.id.tv_main_result);
        iv_image = (ImageView) findViewById(R.id.iv_image);
        //得到传感器管理者
        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);

        //得到光线传感器
   //     sensorLight = sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
        //获取加速度传感器
 //       sensorACC = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

        //获取方向传感器
        sensorOri=sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);


        //获取光线传感器的值（光线值）
        myListener = new MyListener();
    }
    //注册监听（监听某一个传感器的值）
    @Override
    protected void onResume() {
        super.onResume();
        sensorManager.registerListener(myListener,sensorOri,SensorManager.SENSOR_DELAY_UI);
    }

    class MyListener implements SensorEventListener{
        //当值发生改变
        @Override
        public void onSensorChanged(SensorEvent sensorEvent) {
            float[] f=sensorEvent.values;
            float x=f[0];
            float y=f[1];
            float z=f[2];
            tv_main_result.setText("x="+x+"\ny="+y+"\nz="+z);

            //实例化旋转动画
            RotateAnimation rotateAnimation=new RotateAnimation(current,-x, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF,0.5f);
            rotateAnimation.setDuration(200);
            current=-x;
            iv_image.startAnimation(rotateAnimation);

            //改变屏幕的亮度
//            WindowManager.LayoutParams layoutParams=getWindow().getAttributes();
//            layoutParams.screenBrightness=light/255f;
//            getWindow().setAttributes(layoutParams);
        }
        //当值的精度发生改变
        @Override
        public void onAccuracyChanged(Sensor sensor, int i) {

        }
    }

    //取消注册监听
    @Override
    protected void onDestroy() {
        super.onDestroy();
        sensorManager.unregisterListener(myListener);
    }
    //    public void getAllSensors(View view){
//        List<Sensor> sensors=sensorManager.getSensorList(Sensor.TYPE_ALL);
//        for(Sensor s:sensors){
//            Log.i("test",  s.getName());
//        }
//
//    }
}