Android距离传感器应用之俯卧撑计数

主要代码为：
package com.example.happypushup2;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.SoundPool;
import android.os.SystemClock;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;
import android.widget.TextView;
import android.widget.TimePicker;
import android.media.MediaPlayer.OnCompletionListener;

import java.io.IOException;
import java.text.DecimalFormat;

public class SurfaceViewAcitvityJs extends Activity implements
SensorEventListener {

private Chronometer myChronometer = null;private SurfaceViewAcitvityJs activity = null;private Button butStart = null;private Button butStop = null;DecimalFormat nf = new DecimalFormat("0.00");private SensorManager mSensorMgr = null;Sensor mSensor = null;private double mGX = 0;private TextView fwcGs = null;String time = null;String settime = "02:00";private TimePickerDialog tpd = null; // 时间选择器private int count = 9;private int counter=9;private int group=0;private TextView fwcSj = null;String S1;String S2;int mSound_0 = 0;private MediaPlayer mMediaPlayer;private void playLocalFile() {    mMediaPlayer = MediaPlayer.create(this, R.raw.in_call_alarm);    // 播放工程res目录下的raw目录中的音乐文件in_call_alarm    try {        mMediaPlayer.prepare();    } catch (IllegalStateException e) {    } catch (IOException e) {    }    mMediaPlayer.start();    // mMediaPlayer.setOnCompletionListener(new OnCompletionListener() {    // public void onCompletion(MediaPlayer mp) {    // //播完了接着播或者关闭mMediaPlayer，只播放一次    // });}@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    super.setContentView(R.layout.activity_surface_view_acitvity_js);    fwcGs = (TextView) findViewById(R.id.textViewGs);//获取组件    fwcSj = (TextView) findViewById(R.id.textViewSj);    fwcSj.setText(settime);    this.butStart = (Button) super.findViewById(R.id.butStart);    this.butStop = (Button) super.findViewById(R.id.butStop);    butStart.setWidth(80);    butStart.setHeight(60);    butStop.setWidth(80);    butStop.setHeight(60);    // 设置事件类,打开时间对话框    this.butStart.setOnClickListener(new OnClickListenerImpl());    // 设置事件类,返回主界面    this.butStop.setOnClickListener(new OnClickListenerImplStop());    // 创建一个声音播放池    // mSoundPool = new SoundPool (2, AudioManager.STREAM_MUSIC,100);    // 音效加载    // mSound_0 = mSoundPool.load(this, R.raw.voic_p1, 0);    // 计时器初始化    this.myChronometer = (Chronometer) super            .findViewById(R.id.myChronometer);    this.myChronometer.setFormat("%s");    // 计时器侦听    this.myChronometer            .setOnChronometerTickListener(new OnChronometerTickListenerImpl());    // SensorMannager 传感器管理对象，用sensor    mSensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);    // 获取近距离感应器    mSensor = mSensorMgr.getDefaultSensor(Sensor.TYPE_PROXIMITY);    // 注册 listener,第三个参数是检测的精确度    mSensorMgr.registerListener(this, mSensor,            SensorManager.SENSOR_DELAY_FASTEST);    playLocalFile();}// 获取近距离感应器状态变化public void onSensorChanged(SensorEvent event) {    // 身体接近近距离感应器计半个数,离开感应器计半个数    mGX = mGX + 1;    // 俯卧撑计数,显示到文本    fwcGs.setText(nf.format(mGX/2));    // 如果是第一次触发近距离感应器,计时器开始计时    if (mGX == 1) {        myChronometer.start();        count--;    }    // 播放音效,声音提示    // mSoundPool.play(mSound_0, 1, 1, 0, 0, 1);    if ((mGX-1)%9==0) {        OnFinishingListener();        //Intent intent = new Intent(activity,GreatNew.class);        group++;        counter--;        count=counter;        AlertDialog.Builder builder  = new Builder(SurfaceViewAcitvityJs.this);        builder.setTitle("确认" ) ;        builder.setPositiveButton("是" ,  null );        builder.show();        //intent.putExtra("group", group);        //activity.startActivity(intent);    }    /*     * if(mGX == 10.5 || mGX == 20.5 || mGX == 30.5){ OnFinishingListener();     * Intent intent = new Intent(activity,GreatNew.class);//触发新的activity     * activity.startActivity(intent); }     */}// 语音提示：你真棒private void OnFinishingListener() {    // TODO Auto-generated method stub    mMediaPlayer = MediaPlayer.create(this, R.raw.nizhenbang);    // 播放工程res目录下的raw目录中的音乐文件 你真棒    try {        mMediaPlayer.prepare();    } catch (IllegalStateException e) {    } catch (IOException e) {    }    mMediaPlayer.start();}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {}// 计时器侦听事件,当计时器与设置的时间相等时,弹出对话框。private class OnChronometerTickListenerImpl implements        Chronometer.OnChronometerTickListener {    public void onChronometerTick(Chronometer chronometer) {        time = chronometer.getText().toString()                .replaceAll("[^(\\d{2}:\\d {2})]", "");        if (settime.equals(time)) {            openOptionsDialog();        }    }}// 计时结束时的对话框private void openOptionsDialog() {    new AlertDialog.Builder(this)            .setTitle("End Up!")            .setMessage(fwcGs.getText())            .setPositiveButton(" 确 认 ",                    new DialogInterface.OnClickListener() {                        public void onClick(DialogInterface dialog,                                int which) {                            myChronometer.stop();                            myChronometer.setBase(SystemClock                                    .elapsedRealtime());                            mGX = 0.0;                            fwcGs.setText(nf.format(mGX));                        }                    }).show();}// 时间对话框的设置,控件设置多长时间private class OnClickListenerImpl implements View.OnClickListener {    public void onClick(View view) {        mGX = 0;        fwcGs.setText(nf.format(mGX));        Dialog dialog = new TimePickerDialog(SurfaceViewAcitvityJs.this,                new TimePickerDialog.OnTimeSetListener() {                    public void onTimeSet(TimePicker view, int hourOfDay,                            int minute) {                        if (hourOfDay <= 9) {                            S2 = "0" + String.valueOf(hourOfDay);                        }                        else {                            S2 = String.valueOf(hourOfDay);                        }                        if (minute <= 9) {                            S1 = "0" + String.valueOf(minute);                        }                        else {                            S1 = String.valueOf(minute);                        }                        fwcSj.setText(S2 + ":" + S1);                        settime = (String) fwcSj.getText();                    }                }, 02, 00, true);        dialog.show();    }}private class OnClickListenerImplStop implements View.OnClickListener {    @Override    public void onClick(View view) {        // TODO Auto-generated method stub        mGX = 0;        fwcGs.setText(nf.format(mGX));        fwcSj.setText("00" + ":" + "00");        settime = (String) fwcSj.getText();        myChronometer.stop();    }}

}