本文例項為大家分享了Android實現動態體溫計的具體程式碼，供大家參考，具體內容如下

前段時間在做一個生理引數採集的專案，其中涉及到體溫模組。這是我的部分總結。
實現內容： 從檔案中讀取體溫資料，動態繪製體溫的效果。即體溫資料隨時間在不停的變化。體溫計繪製效果為立體效果。

實現原理：

1、體溫計的繪製

繪製原理：

體溫計的大體框架由圖1,2,4,5,6,7構成，繪製通過自定義View，DrawView的onDraw()方法來實現，體溫計水銀柱的的繪製通過SurfaceView來實現。根據螢幕寬度來設定體溫計大小及位置。

圖1，2，6構成體溫計玻璃管，由顏色Color.argb(255,25,112)和顏色Color.argb(250,65,105,225)從左往右一次填充，實現漸變。圖3是動態矩形，為體溫計水銀柱，由Color.RED和Color.argb(250,255,0)有下往上填充，實現紅色到橙色的漸變。圖8為體溫計水銀柱頭部，用紅色填充。圖4，5組合形成光暈，圖4由Color.argb(30,250,250)填充，圖5填充顏色與體溫計玻璃管相同。先繪製圖4再繪製圖5，於是，便形成月牙形光暈。圖7為光暈，由Color.argb(30,250)填充。然後畫出刻度線，這樣便製作出具有立體感的體溫計。感覺底座部分設計的不大好，立體感不強。

動態重新整理原理：將從檔案中的體溫資料讀取，儲存到陣列當中，繪製體溫時，根據資料來確定中間紅色水銀柱的座標，其實，也就是動態矩形的繪製，採用定時繪製的方法實現動態效果。

原理說的差不多了，我們來看下程式碼實現過程：

佈局檔案：textView用來顯示數值，surfaceView用來繪製動態矩形。

temp.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical" >

 <RelativeLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@drawable/b03"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin" >

  <LinearLayout
   android:id="@+id/linearLayout02"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:orientation="horizontal" >
  </LinearLayout>

  <LinearLayout
   android:id="@+id/linearLayout01"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content" >

   <SurfaceView
    android:id="@+id/surfacetemp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginRight="20dp" />
  </LinearLayout>

  <TextView 
   android:id="@+id/textview01"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentLeft="true"
   android:layout_gravity="center"
   android:layout_marginTop="160dp"
   android:textColor="#00C957"
   android:textSize="40sp" />

  <TextView
   android:id="@+id/textview02"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginLeft="10dp"
   android:layout_marginTop="130dp"
   android:layout_toRightOf="@+id/textview01"
   android:textColor="#00FF00"
   android:textSize="30sp" />

  <TextView
   android:id="@+id/textview03"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginLeft="2dp"
   android:layout_marginTop="130dp"
   android:layout_toRightOf="@+id/textview02"
   android:textColor="#00FF00"
   android:textSize="60sp" />

  <Button
   android:id="@+id/button01"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentBottom="true"
   android:layout_alignParentLeft="true"
   android:layout_marginBottom="40dp"
   android:layout_marginLeft="50dp"
   android:background="@drawable/button_selector"
   android:text="開始"
   android:textColor="@color/paleturquoise"
   android:textSize="15sp" />

  <Button
   android:id="@+id/button02"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentBottom="true"
   android:layout_alignParentRight="true"
   android:layout_marginBottom="40dp"
   android:layout_marginRight="50dp"
   android:background="@drawable/button_selector"
   android:text="暫停"
   android:textColor="@color/paleturquoise"
   android:textSize="15sp" />
 </RelativeLayout>

</LinearLayout>

體溫計繪製View程式碼段：

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.util.DisplayMetrics;
import android.view.View;

public class DrawTemp extends View{


 private float wide;
 private float high;
 private float t_wide;
 private float t_high ;
 private float r; //半徑大小
 private float x0;//圓心座標
 private float x1;
 private float y0;
 private float y1;
 /*自定義顏色*/
 private int color_blue = Color.argb(255,112);
 private int color_bule1 = Color.argb(250,225);
 private int color_white = Color.argb(30,250);
 private int color_white1 = Color.argb(60,250);
 private int color_orange = Color.argb(250,0);
 public DrawTemp(Context context) {
  super(context);
  // TODO 自動生成的建構函式存根
   Paint paint = new Paint();
   paint.setColor(Color.YELLOW);
 }

  protected void onDraw(Canvas canvas)
  {
   DisplayMetrics dm = new DisplayMetrics(); 
   dm = getResources().getDisplayMetrics();
  wide = dm.widthPixels; // 螢幕寬（畫素，如：480px） 
 high = dm.heightPixels; // 螢幕高（畫素，如：800px）
   t_wide = wide/20;
   t_high = high/20;
   r = t_high-10;
   x0 = wide/2+2*t_wide;
   x1 = wide/2+4*t_wide;
   y0 = t_high*2;
   y1 = 10*t_high;

   float ydegree = 9*t_high; 
   int min_temp = 35; //最低溫度為35
   int m1 = 4;
   int Line1_size = 1;
    int Line2_size = 3;
    int Line3_size = 5;
   //設定最小大刻度線條引數
   Paint paintLine1 = new Paint(); 
   paintLine1.setColor(Color.BLUE); 
   paintLine1.setStrokeWidth(Line3_size);
   //設定中等刻度線條引數
   Paint paintLine2 = new Paint(); 
   paintLine2.setColor(Color.YELLOW); 
   paintLine2.setStrokeWidth(Line2_size);
   //設定最小刻度線條引數
   Paint paintLine3 = new Paint(); 
   paintLine3.setColor(Color.GREEN); 
   paintLine3.setStrokeWidth(Line1_size);
   //設定文字引數
   Paint text = new Paint();
   text.setColor(Color.MAGENTA);
   text.setTextSize(30);

   Paint mPaint = new Paint(); 
   mPaint.setStrokeWidth(m1);
   LinearGradient ng= new LinearGradient(x0-10,y0,x1-10,color_blue,color_bule1,Shader.TileMode.CLAMP);
   mPaint.setShader(ng);
   canvas.drawRect(x0-10,x1+10,y1,mPaint);//繪製外圍矩形
   canvas.drawCircle(x0+t_wide,t_wide+10,mPaint );//繪製外圍上部分圓弧
   canvas.drawCircle(x0+t_wide,r+10,mPaint);//繪製外圍底座


   //繪製水銀柱
   Paint nPaint = new Paint();
   nPaint.setColor(Color.RED);
   canvas.drawCircle(x0+t_wide,r-10,nPaint); 
   //LinearGradient mg= new LinearGradient(x0+10,x0-10,Color.RED,color_orange,Shader.TileMode.CLAMP);
   LinearGradient mg= new LinearGradient(x0+10,Shader.TileMode.CLAMP); 
   nPaint.setShader(mg);

   //繪製動態矩形
   // canvas.drawRect(x0+10,y,nPaint);

   //繪製光暈，圓角矩形
   Paint paint = new Paint();
   paint.setColor(color_white);
   RectF Rect = new RectF(x0-5,x0+5,y1-t_high);

   canvas.drawCircle(x0+t_wide,y0-t_wide/2-t_wide/3,t_wide/3,paint );
   canvas.drawCircle(x0+t_wide,t_wide-t_wide/8,mPaint );

   canvas.drawCircle(x0+t_wide-8,paint);

   canvas.drawCircle(x0+t_wide,nPaint); 
   paint.setColor(color_white1);
   RectF Rect3 = new RectF(x0,x0+t_wide,y1+t_wide);
   canvas.drawArc(Rect3,30,false,paint);

   while (ydegree > y0+30) {  
     canvas.drawLine(x1+10,ydegree,x1+15,paintLine3); 
    if (ydegree % t_high == 0) { 
     canvas.drawLine(x1+10,x1+50,paintLine1); 
     canvas.drawText(min_temp + "",x1+55,ydegree + 5,text); 
     min_temp++; 
    } 
    else if(ydegree % (t_high/2) == 0)
    {
      canvas.drawLine(x1+10,x1+25,paintLine2); 
    }
    ydegree = ydegree - 2 ; 
   }  
} 
}

主程式:

public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.temp_layout);

  innit(); // 初始化
 ActionBarUtils.initActionBar(getApplicationContext(),getActionBar(),"體溫");

  timer = new Timer();

   start.setOnClickListener(new OnClickListener()
   {

   @Override
   public void onClick(View v) {
    // TODO 自動生成的方法存根
     timer= new Timer();

     handler = new Handler()
     { 
      @Override 
      public void handleMessage(Message msg) 
      {  //重新整理圖表 
        s = String.valueOf(min_data);   

        if(msg.what == 1)
        { 
         text1.setText(s); 
        }
        if(msg.what == 0)
        {
         String num = String.valueOf(number);
         text1.setText(num);
        }
        else if(msg.what == 2)
        {
         text1.setText("爆表啦");
        }

        super.handleMessage(msg); 
      } 
     };

     task = new TimerTask() 
     { 
      @Override 
      public void run() 
      { 
       Message message = new Message();
       // drawPmThread pm = new drawPmThread();
       if( min_data == number)
       {
        onDestroy();
       }

       if(number>40)
        {
        message.what = 2;
        handler.sendMessage(message);
        }

       if(0<min_data && min_data < 35)
       {
        message.what = 0;
        handler.sendMessage(message);
       }
       else if (35<=min_data && min_data<number)
       {

        draw(min_data);
        message.what = 1; 
        handler.sendMessage(message);
        min_data++;
       }

      } 
     };
   //定時重新整理  
     timer.schedule(task,40);
   }
   }
    );

  stop.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    stopTimer();
   }
  });
 }

 // 初始化介面
 private void innit() {
  // TODO Auto-generated method stub
  start = (Button) findViewById(R.id.button01);
  stop = (Button) findViewById(R.id.button02);
  text1 = (TextView) findViewById(R.id.textview01);
  text2 = (TextView) findViewById(R.id.textview02);
  text3 = (TextView) findViewById(R.id.textview03);
  save = (TextView) findViewById(R.id.textView1);
  linearLayout02 = (LinearLayout) findViewById(R.id.linearLayout02);
  drawView = new DrawTemp(this);
  linearLayout02.addView(drawView);
  surface = (SurfaceView) findViewById(R.id.surfacetemp);

  String s2 = "o";
  String s3 = "C";
  text2.setText(s2);
  text3.setText(s3);
  TextPaint tp = start.getPaint();
  tp.setFakeBoldText(true);
  TextPaint tp1 = stop.getPaint();
  tp1.setFakeBoldText(true);
  scrn = new DisplayMetrics();
  getWindowManager().getDefaultDisplay().getMetrics(scrn);

  holder = surface.getHolder(); 
  holder.addCallback(this);

  surface.setZOrderOnTop(true); //設定背景色為透明
  surface.getHolder().setFormat(PixelFormat.TRANSLUCENT);
  // thread = new Thread(this,"SurfaceView");

  width = scrn.widthPixels; // 寬度（PX）
  height = scrn.heightPixels; // 高度（PX）
  t_width = width/20;
  t_height = height/20;
  x0 = width/2+2*t_width;
  x1 = width/2+4*t_width;
  y1 = 10*t_height;

 }

 // 停止計時器
 private void stopTimer() {

  if (timer != null) {
   timer.cancel();
   timer = null;
  }

  if (task != null) {
   task.cancel();
   task = null;
  }
 }
 // 繪製體溫動態柱形圖
 private void draw(float min_data)
 {

  int ydegree = 9 * t_height;
  float y = ydegree - (min_data - 35) * t_height;
  Canvas canvas = holder.lockCanvas();
  // 繪製動態矩形
  Paint nPaint = new Paint();
  nPaint.setColor(Color.RED);
  canvas.drawRect(x0 + 10,x1 - 10,nPaint);

  holder.unlockCanvasAndPost(canvas);// 更新螢幕顯示內容 */
 }

 class MyCallBack implements SurfaceHolder.Callback {

  @Override
  public void surfaceChanged(SurfaceHolder arg0,int arg1,int arg2,int arg3) {
   // TODO Auto-generated method stub
  }

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。