实例介绍
【实例简介】
【实例截图】
【核心代码】
package com.example.xinlv;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.atomic.AtomicBoolean;
import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.model.XYSeries;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;
import com.jwetherell.heart_rate_monitor.ImageProcessing;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Color;
import android.graphics.Paint.Align;
import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.Toast;
//import android.view.View;
import android.widget.TextView;
public class MainActivity extends Activity {
// 曲线
private Timer timer = new Timer();
private TimerTask task;
private static int gx;
private static int j;
private static double flag=1;
private Handler handler;
private String title = "pulse";
private XYSeries series;
private XYMultipleSeriesDataset mDataset;
private GraphicalView chart;
private XYMultipleSeriesRenderer renderer;
private Context context;
private int addX = -1;
double addY;
int[] xv = new int[300];
int[] yv = new int[300];
int[] hua=new int[]{9,10,11,12,13,14,13,12,11,10,9,8,7,6,7,8,9,10,11,10,10};
// private static final String TAG = "HeartRateMonitor";
private static final AtomicBoolean processing = new AtomicBoolean(false);
private static SurfaceView preview = null;
private static SurfaceHolder previewHolder = null;
private static Camera camera = null;
// private static View image = null;
private static TextView text = null;
private static TextView text1 = null;
private static TextView text2 = null;
private static WakeLock wakeLock = null;
private static int averageIndex = 0;
private static final int averageArraySize = 4;
private static final int[] averageArray = new int[averageArraySize];
public static enum TYPE {
GREEN, RED
};
private static TYPE currentType = TYPE.GREEN;
public static TYPE getCurrent() {
return currentType;
}
private static int beatsIndex = 0;
private static final int beatsArraySize = 3;
private static final int[] beatsArray = new int[beatsArraySize];
private static double beats = 0;
private static long startTime = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 曲线
context = getApplicationContext();
//这里获得main界面上的布局，下面会把图表画在这个布局里面
LinearLayout layout = (LinearLayout)findViewById(R.id.linearLayout1);
//这个类用来放置曲线上的所有点，是一个点的集合，根据这些点画出曲线
series = new XYSeries(title);
//创建一个数据集的实例，这个数据集将被用来创建图表
mDataset = new XYMultipleSeriesDataset();
//将点集添加到这个数据集中
mDataset.addSeries(series);
//以下都是曲线的样式和属性等等的设置，renderer相当于一个用来给图表做渲染的句柄
int color = Color.GREEN;
PointStyle style = PointStyle.CIRCLE;
renderer = buildRenderer(color, style, true);
//设置好图表的样式
setChartSettings(renderer, "X", "Y", 0, 300, 4, 16, Color.WHITE, Color.WHITE);
//生成图表
chart = ChartFactory.getLineChartView(context, mDataset, renderer);
//将图表添加到布局中去
layout.addView(chart, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
/* thread = new Thread(){
public void arrayList(int u) {
ArrayList arrayList = new ArrayList();
arrayList.add(HardwareControler.readADC());
}
};*/
//这里的Handler实例将配合下面的Timer实例，完成定时更新图表的功能
handler = new Handler() {
@Override
public void handleMessage(Message msg) {
// 刷新图表
updateChart();
super.handleMessage(msg);
}
};
task = new TimerTask() {
@Override
public void run() {
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};
timer.schedule(task, 1,20); //曲线
preview = (SurfaceView) findViewById(R.id.preview);
previewHolder = preview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// image = findViewById(R.id.image);
text = (TextView) findViewById(R.id.text);
text1 = (TextView) findViewById(R.id.text1);
text2 = (TextView) findViewById(R.id.text2);
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "DoNotDimScreen");
}
// 曲线
@Override
public void onDestroy() {
//当结束程序时关掉Timer
timer.cancel();
super.onDestroy();
};
protected XYMultipleSeriesRenderer buildRenderer(int color, PointStyle style, boolean fill) {
XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
//设置图表中曲线本身的样式，包括颜色、点的大小以及线的粗细等
XYSeriesRenderer r = new XYSeriesRenderer();
r.setColor(Color.RED);
// r.setPointStyle(null);
// r.setFillPoints(fill);
r.setLineWidth(1);
renderer.addSeriesRenderer(r);
return renderer;
}
protected void setChartSettings(XYMultipleSeriesRenderer renderer, String xTitle, String yTitle,
double xMin, double xMax, double yMin, double yMax, int axesColor, int labelsColor) {
//有关对图表的渲染可参看api文档
renderer.setChartTitle(title);
renderer.setXTitle(xTitle);
renderer.setYTitle(yTitle);
renderer.setXAxisMin(xMin);
renderer.setXAxisMax(xMax);
renderer.setYAxisMin(yMin);
renderer.setYAxisMax(yMax);
renderer.setAxesColor(axesColor);
renderer.setLabelsColor(labelsColor);
renderer.setShowGrid(true);
renderer.setGridColor(Color.GREEN);
renderer.setXLabels(20);
renderer.setYLabels(10);
renderer.setXTitle("Time");
renderer.setYTitle("mmHg");
renderer.setYLabelsAlign(Align.RIGHT);
renderer.setPointSize((float) 3 );
renderer.setShowLegend(false);
}
private void updateChart() {
//设置好下一个需要增加的节点
// addX = 10;
//addY = (int)(Math.random() * 90 50);
// addY = (int)(HardwareControler.readADC());
// addY=10 addY;
// if(addY>1400)
// addY=10;
if(flag==1)
addY=10;
else{
// addY=250;
flag=1;
if(gx<200){
if(hua[20]>1){
Toast.makeText(MainActivity.this, "请用您的指尖盖住摄像头镜头！", Toast.LENGTH_SHORT).show();
hua[20]=0;}
hua[20] ;
return;}
else
hua[20]=10;
j=0;
}
if(j<20){
addY=hua[j];
j ;
}
//移除数据集中旧的点集
mDataset.removeSeries(series);
//判断当前点集中到底有多少点，因为屏幕总共只能容纳100个，所以当点数超过100时，长度永远是100
int length = series.getItemCount();
int bz=0;
// addX = length;
if (length > 300) {
length = 300;
bz=1;
}
addX = length;
//将旧的点集中x和y的数值取出来放入backup中，并且将x的值加1，造成曲线向右平移的效果
for (int i = 0; i < length; i ) {
xv[i] = (int) series.getX(i) -bz;
yv[i] = (int) series.getY(i);
}
//点集先清空，为了做成新的点集而准备
series.clear();
mDataset.addSeries(series);
//将新产生的点首先加入到点集中，然后在循环体中将坐标变换后的一系列点都重新加入到点集中
//这里可以试验一下把顺序颠倒过来是什么效果，即先运行循环体，再添加新产生的点
series.add(addX, addY);
for (int k = 0; k < length; k ) {
series.add(xv[k], yv[k]);
}
//在数据集中添加新的点集
// mDataset.addSeries(series);
//视图更新，没有这一步，曲线不会呈现动态
//如果在非UI主线程中，需要调用postInvalidate()，具体参考api
chart.invalidate();
} //曲线
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
@Override
public void onResume() {
super.onResume();
wakeLock.acquire();
camera = Camera.open();
startTime = System.currentTimeMillis();
}
@Override
public void onPause() {
super.onPause();
wakeLock.release();
camera.setPreviewCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
private static PreviewCallback previewCallback = new PreviewCallback() {
public void onPreviewFrame(byte[] data, Camera cam) {
if (data == null)
throw new NullPointerException();
Camera.Size size = cam.getParameters().getPreviewSize();
if (size == null)
throw new NullPointerException();
if (!processing.compareAndSet(false, true))
return;
int width = size.width;
int height = size.height;
//图像处理
int imgAvg = ImageProcessing.decodeYUV420SPtoRedAvg(data.clone(),height,width);
gx=imgAvg;
text1.setText("平均像素值是" String.valueOf(imgAvg));
//像素平均值imgAvg,日志
// Log.i(TAG, "imgAvg=" imgAvg);
if (imgAvg == 0 || imgAvg == 255) {
processing.set(false);
return;
}
int averageArrayAvg = 0;
int averageArrayCnt = 0;
for (int i = 0; i < averageArray.length; i ) {
if (averageArray[i] > 0) {
averageArrayAvg = averageArray[i];
averageArrayCnt ;
}
}
int rollingAverage = (averageArrayCnt > 0)?(averageArrayAvg/averageArrayCnt):0;
TYPE newType = currentType;
if (imgAvg < rollingAverage) {
newType = TYPE.RED;
if (newType != currentType) {
beats ;
flag=0;
text2.setText("脉冲数是 " String.valueOf(beats));
// Log.e(TAG, "BEAT!! beats=" beats);
}
} else if (imgAvg > rollingAverage) {
newType = TYPE.GREEN;
}
if (averageIndex == averageArraySize)
averageIndex = 0;
averageArray[averageIndex] = imgAvg;
averageIndex ;
// Transitioned from one state to another to the same
if (newType != currentType) {
currentType = newType;
// image.postInvalidate();
}
//获取系统结束时间（ms）
long endTime = System.currentTimeMillis();
double totalTimeInSecs = (endTime - startTime) / 1000d;
if (totalTimeInSecs >= 2) {
double bps = (beats / totalTimeInSecs);
int dpm = (int) (bps * 60d);
if (dpm < 30 || dpm > 180||imgAvg<200) {
//获取系统开始时间（ms）
startTime = System.currentTimeMillis();
//beats心跳总数
beats = 0;
processing.set(false);
return;
}
// Log.e(TAG, "totalTimeInSecs=" totalTimeInSecs " beats=" beats);
if (beatsIndex == beatsArraySize)
beatsIndex = 0;
beatsArray[beatsIndex] = dpm;
beatsIndex ;
int beatsArrayAvg = 0;
int beatsArrayCnt = 0;
for (int i = 0; i < beatsArray.length; i ) {
if (beatsArray[i] > 0) {
beatsArrayAvg = beatsArray[i];
beatsArrayCnt ;
}
}
int beatsAvg = (beatsArrayAvg / beatsArrayCnt);
text.setText("小毛同志的心率是" String.valueOf(beatsAvg) " zhi:" String.valueOf(beatsArray.length)
" " String.valueOf(beatsIndex) " " String.valueOf(beatsArrayAvg) " " String.valueOf(beatsArrayCnt));
//获取系统时间（ms）
startTime = System.currentTimeMillis();
beats = 0;
}
processing.set(false);
}
};
private static SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(previewHolder);
camera.setPreviewCallback(previewCallback);
} catch (Throwable t) {
// Log.e("PreviewDemo-surfaceCallback","Exception in setPreviewDisplay()", t);
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
Camera.Parameters parameters = camera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
Camera.Size size = getSmallestPreviewSize(width, height, parameters);
if (size != null) {
parameters.setPreviewSize(size.width, size.height);
// Log.d(TAG, "Using width=" size.width " height=" size.height);
}
camera.setParameters(parameters);
camera.startPreview();
}
public void surfaceDestroyed(SurfaceHolder holder) {
// Ignore
}
};
private static Camera.Size getSmallestPreviewSize(int width, int height,
Camera.Parameters parameters) {
Camera.Size result = null;
for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
if (size.width <= width && size.height <= height) {
if (result == null) {
result = size;
} else {
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea < resultArea)
result = size;
}
}
}
return result;
}
}
好例子网口号：伸出你的我的手 — 分享！
小贴士
感谢您为本站写下的评论，您的评论对其它用户来说具有重要的参考价值，所以请认真填写。
- 类似“顶”、“沙发”之类没有营养的文字，对勤劳贡献的楼主来说是令人沮丧的反馈信息。
- 相信您也不想看到一排文字/表情墙，所以请不要反馈意义不大的重复字符，也请尽量不要纯表情的回复。
- 提问之前请再仔细看一遍楼主的说明，或许是您遗漏了。
- 请勿到处挖坑绊人、招贴广告。既占空间让人厌烦，又没人会搭理，于人于己都无利。
关于好例子网
本站旨在为广大IT学习爱好者提供一个非营利性互相学习交流分享平台。本站所有资源都可以被免费获取学习研究。本站资源来自网友分享，对搜索内容的合法性不具有预见性、识别性、控制性，仅供学习研究，请务必在下载后24小时内给予删除，不得用于其他任何用途，否则后果自负。基于互联网的特殊性，平台无法对用户传输的作品、信息、内容的权属或合法性、安全性、合规性、真实性、科学性、完整权、有效性等进行实质审查；无论平台是否已进行审查，用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二与二十三条之规定，若资源存在侵权或相关问题请联系本站客服人员，点此联系我们。关于更多版权及免责申明参见 版权及免责申明
网友评论
我要评论