温度传感器，摇一摇

标签：一个   四舍五入   change   let   小数   new   version   parent   find   

权限： <uses-permission android:name="android.permission.VIBRATE" />



布局：

<?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.my_chuanganqi_yaoyiyao.MainActivity">

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />

    <TextView
        android:id="@+id/tv_1"
        android:visibility="gone"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="摇一摇\n开始啦~\\(≧▽≦)/~"
        android:gravity="center"
        android:textSize="40sp"
        android:textColor="#ffffff"
        android:background="#000000"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="温度"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="100dp" />
</RelativeLayout>

package com.example.my_chuanganqi_yaoyiyao;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    private TextView tv;
    private TextView tv_1; // 显示摇一摇
    private TextView tv_2; // 显示温度

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv = (TextView) findViewById(R.id.tv);
        tv_1 = (TextView) findViewById(R.id.tv_1); // 显示摇一摇
        tv_2 = (TextView) findViewById(R.id.tv_2); // 显示温度

        // 获取 系统传感器管理器
        SensorManager sm = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        // 通过传感器管理器 获取 本地所有的传感器
        List<Sensor> sensors = sm.getSensorList(Sensor.TYPE_ALL);

        for (Sensor s: sensors) {
            System.out.println("Sensor == " + s.toString());
        }

        // 获取指定的某一个传感器
        Sensor type_accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        if (type_accelerometer!=null) {
            System.out.println("Sensor 获取指定的某一个传感器 " + type_accelerometer.toString());
        }

        // 注册传感器的监听器 （摇一摇）
        sm.registerListener(new SensorEventListener() {
            @Override
            public void onSensorChanged(SensorEvent sensorEvent) {
                // 传感器数据变化，在该方法中我们可以获取传感器变化的值
                float x = sensorEvent.values[0];
                float y = sensorEvent.values[1];
                float z = sensorEvent.values[2];
                tv.setText("x="+x+",y="+y+",z="+z);

                if (Math.abs(x)+Math.abs(y)+Math.abs(z)>=ringValue && flag == false){
                    flag = true;
                    tv_1.setVisibility(View.VISIBLE);
                    MediaPlayer mp = MediaPlayer.create(MainActivity.this,R.raw.yaoyiyao);
                    mp.start();
                    mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                        @Override
                        public void onCompletion(MediaPlayer mediaPlayer) {
                            mediaPlayer.release();
                            flag = false;
                            MediaPlayer.create(MainActivity.this,R.raw.yaodaole).start();
                            tv_1.setVisibility(View.GONE);
                        }
                    });
                }
            }
            @Override
            public void onAccuracyChanged(Sensor sensor, int i) {
                // 传感器精度的变化
            }
        },type_accelerometer,SensorManager.SENSOR_DELAY_NORMAL);



        // 温度传感器
        Sensor type_ambient_temperature = sm.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE);
        System.out.println(type_ambient_temperature);
        sm.registerListener(new SensorEventListener() {
            @Override
            public void onSensorChanged(SensorEvent sensorEvent) {
                float temp = sensorEvent.values[0];
                System.out.println(sensorEvent.values[0]);                System.out.println(sensorEvent.values[1]);                System.out.println(sensorEvent.values[2]);                temp = (float) (Math.round(temp * 10.0) / 10.0); // 四舍五入 保留一位小数                tv_2.setText("温度:" + temp + "°C");            }            @Override            public void onAccuracyChanged(Sensor sensor, int i) {                System.out.println(sensor);                System.out.println(i);            }        },type_ambient_temperature, SensorManager.SENSOR_DELAY_NORMAL);    }    int ringValue = 40;    boolean flag = false;}

温度传感器，摇一摇

标签：一个   四舍五入   change   let   小数   new   version   parent   find   

原文地址：http://www.cnblogs.com/98k98k/p/7822545.html