安卓计步器的简单实现

参考链接：https://blog.csdn.net/fjnu_se/article/details/90906209

大体思路：在参考链接的基础上，我去掉了显示时间的线程。用android自带计步传感器进行计步，用一个数据库存储每日0点时计步器的总步数，由此可以计算出当日的步数。如果手机重启过，就清除掉所有的旧记录。现有问题是只有在app运行的情况下才能把当日0点时计步器的总步数加入数据库。

运行效果图：

结构目录：

activity_main.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:app="http://schemas.android.com/apk/res-auto"
 4     xmlns:tools="http://schemas.android.com/tools"
 5     android:layout_width="match_parent"
 6     android:layout_height="match_parent"
 7     tools:context=".MainActivity">
 8
 9     <ScrollView
10         android:layout_width="match_parent"
11         android:layout_height="wrap_content">
12     </ScrollView>
13
14     <ListView
15         android:id="@+id/listview"
16         android:layout_width="match_parent"
17         android:layout_height="400dp">
18     </ListView>
19
20     <TextView
21         android:id="@+id/steps"
22         android:layout_below="@+id/listview"
23         android:textSize="25dp"
24         android:layout_width="wrap_content"
25         android:layout_height="wrap_content"
26         android:layout_gravity="center_horizontal" />
27
28 </RelativeLayout>

MainActivity：

  1 package com.mingrisoft.countsteps;
  2
  3 import android.content.ContentValues;
  4 import android.database.Cursor;
  5 import android.database.sqlite.SQLiteDatabase;
  6 import android.hardware.Sensor;
  7 import android.hardware.SensorEvent;
  8 import android.hardware.SensorEventListener;
  9 import android.hardware.SensorManager;
 10 import android.os.Handler;
 11 import android.os.Message;
 12 import android.provider.ContactsContract;
 13 import android.provider.ContactsContract.Data;
 14 import android.provider.FontsContract;
 15 import android.sax.EndElementListener;
 16 import android.support.v7.app.AppCompatActivity;
 17 import android.os.Bundle;
 18 import android.text.format.DateFormat;
 19 import android.util.Log;
 20 import android.widget.TextView;
 21
 22 import java.text.SimpleDateFormat;
 23 import java.util.Date;
 24 import java.util.List;
 25
 26 public class MainActivity extends AppCompatActivity implements SensorEventListener{//不实现SensorEventListener接口在真机上会闪退
 27     SensorManager mSensorManager;//管理器实例
 28     Sensor stepCounter;//传感器
 29     float mSteps;//截止当天0点时步数/重启手机到当前为止的步数
 30     TextView steps;//显示步数
 31     TextView time;//显示时间
 32     private DBOpenHelper dbOpenHelper;//定义DBOpenHelper
 33
 34     @Override
 35     protected void onCreate(Bundle savedInstanceState) {
 36         super.onCreate(savedInstanceState);
 37         setContentView(R.layout.activity_main);
 38
 39         // 获取SensorManager管理器实例
 40         mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
 41         dbOpenHelper = new DBOpenHelper(MainActivity.this,"db_step",null,1);
 42         steps = (TextView)findViewById(R.id.steps);
 43         time = (TextView)findViewById(R.id.time);
 44
 45         // 获取计步器sensor
 46         stepCounter = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
 47         if(stepCounter != null){
 48             // 如果sensor找到，则注册监听器
 49             mSensorManager.registerListener((SensorEventListener) this,stepCounter,mSensorManager.SENSOR_DELAY_GAME);
 50         }
 51         else{
 52             Log.e("hemeiwolong","no step counter sensor found");
 53         }
 54     }
 55
 56     //步数变化时
 57     public void onSensorChanged(SensorEvent event) {
 58         Cursor cursor = dbOpenHelper.getReadableDatabase().query("tb_step",null,null, null, null,null,null);
 59 //        while (cursor.moveToNext()) {
 60 //            Log.i("fffff", cursor.getString(0) + cursor.getString(1) + cursor.getString(2));
 61 //        }
 62         //获取今天的日期，统一格式为yyyy/MM/dd
 63         String strdate = new SimpleDateFormat("yyyy/MM/dd").format(new Date());
 64
 65         if (cursor.getCount() == 0) {   //如果计步表为空，则把现在为止的总步数加入数据库
 66             insertData(dbOpenHelper.getReadableDatabase(), strdate, String.valueOf(event.values[0]));
 67             mSteps = event.values[0];
 68         } else {
 69             if (cursor.moveToLast()) {
 70                 if (event.values[0] < Float.parseFloat(cursor.getString(2))) {  //说明手机重启过
 71                     //删除旧的所有步数记录，把现在的总步数加入数据库，注意表名打错的话会闪退
 72                     dbOpenHelper.getReadableDatabase().delete("tb_step",null,null);
 73                     insertData(dbOpenHelper.getReadableDatabase(), strdate, String.valueOf(event.values[0]));
 74
 75                     if (cursor.moveToLast()) {
 76                         mSteps = Float.parseFloat(cursor.getString(2));
 77                     }
 78                 } else {    //如果今天没重启过，则取最新的数据作为今天计步的起始值
 79                     mSteps = Float.parseFloat(cursor.getString(2));
 80                 }
 81             }
 82         }
 83
 84         //今天所走步数 = 目前的总步数 - 今天0点为止的总步数，如果今天重启过，只记录重启到现在所走的步数
 85         float showSteps = event.values[0] - mSteps;
 86         steps.setText("你已经走了"+String.valueOf((int)showSteps)+"步");
 87
 88         //到了0点，把到目前为止所走的总步数加入数据库
 89         String time = "00:00:00";
 90         if (time.equals(new SimpleDateFormat("HH:mm:ss").format(new Date()))){
 91             insertData(dbOpenHelper.getReadableDatabase(), strdate, String.valueOf(event.values[0]));
 92             mSteps = event.values[0];
 93         }
 94     }
 95
 96     @Override
 97     public void onAccuracyChanged(Sensor sensor, int accuracy) {
 98
 99     }
100
101     //向数据库添加记录
102     private void insertData(SQLiteDatabase sqLiteDatabase, String day, String steps) {
103         ContentValues contentValues = new ContentValues();
104         contentValues.put("day", day);
105         contentValues.put("steps", steps);
106
107         sqLiteDatabase.insert("tb_step",null,contentValues);
108     }
109 }

DBOpenHelper：

 1 package com.mingrisoft.countsteps;
 2
 3 import android.content.Context;
 4 import android.database.sqlite.SQLiteDatabase;
 5 import android.database.sqlite.SQLiteOpenHelper;
 6 import android.util.Log;
 7
 8 public class DBOpenHelper extends SQLiteOpenHelper {
 9     //定义创建计步表的SQL语句，每列内容分别为序号，日期，步数
10     final String CREATE_STEPS = "create table tb_step (_id integer primary key autoincrement," +
11             "day, steps)";
12
13     //重写构造方法，并设置工厂为null
14     public DBOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
15         super(context, name, null, version);
16     }
17
18     //创建计步表
19     @Override
20     public void onCreate(SQLiteDatabase db) {
21         db.execSQL(CREATE_STEPS);
22     }
23
24     //重写基类的onUpgrade（）方法，以便数据库版本更新
25     @Override
26     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
27         Log.i("计步表","版本更新"+oldVersion+"-->"+newVersion);
28     }
29 }

manifests：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3     package="com.mingrisoft.countsteps">
 4
 5     <uses-feature android:name="android.hardware.sensor.stepcounter"/>
 6     <uses-feature android:name="feature:android.hardware.sensor.stepdetector"/>
 7
 8     <application
 9         android:allowBackup="true"
10         android:icon="@mipmap/ic_launcher"
11         android:label="@string/app_name"
12         android:roundIcon="@mipmap/ic_launcher_round"
13         android:supportsRtl="true"
14         android:theme="@style/AppTheme">
15         <activity android:name=".MainActivity">
16             <intent-filter>
17                 <action android:name="android.intent.action.MAIN" />
18
19                 <category android:name="android.intent.category.LAUNCHER" />
20             </intent-filter>
21         </activity>
22     </application>
23
24 </manifest>

原文地址：https://www.cnblogs.com/hemeiwolong/p/12631585.html