Android Custom View: Line chart (with animation effect)

Package com.chk.uefa.thirdviews;

Import Android.content.Context;
Import Android.graphics.Canvas;
Import Android.graphics.Paint;
Import Android.os.AsyncTask;
Import Android.os.Handler;
Import Android.os.Message;
Import Android.util.AttributeSet;
Import Android.view.View;

Import Com.lidroid.xutils.util.LogUtils;

/**
* Created by Yulook on 2016/4/7.
*/
public class Brokenlineview extends View {

Private String Price1,price2,price3,price4,price5,price6,price7;
Private String Maxprice,minprice;
private int wide=0,high=0;

Public Brokenlineview (Context context) {
Super (context);
}

Public Brokenlineview (context context, AttributeSet Attrs) {
Super (context, attrs);
}

Public Brokenlineview (context context, AttributeSet attrs, int defstyleattr) {
Super (context, attrs, defstyleattr);
}

/** seven price coordinate points */
public void Setsevenprice (String price1,string price2,string price3,string price4,string price5,string price6,String Price7) {
This.price1=price1;
This.price2=price2;
This.price3=price3;
This.price4=price4;
This.price5=price5;
This.price6=price6;
This.price7=price7;
}

/**y Axis Maximum Minimum value */
public void Setmaxminprice (String maxprice,string minprice) {
This.maxprice=maxprice;
This.minprice=minprice;
}

/** Get Wide Height */
public void Setwidehigh (Int. Wide,int High) {
This.wide=wide;
This.high=high;

}

@Override
protected void OnDraw (canvas canvas) {
Super.ondraw (canvas);

Paint p = new paint ();
P.setstrokewidth ((float) 2.0);
P.setantialias (TRUE);//Set the brush's jagged effect
P.setcolor (Getresources (). GetColor (r.color.red));

if (wide>0) {

if (time<=5&&time>0) {

Double s_y = Getroundy (Price1);
Double e_y = Getroundy (PRICE2);
Double a= (s_y-e_y)/5;
Double b=s_y-a*time;
Canvas.drawline (0, (float) getroundy (Price1), Wide/30*time, (float) b, p);

}else if (time>5&&time<=10) {

Double s_y = Getroundy (PRICE2);
Double e_y = Getroundy (PRICE3);
Double a= (s_y-e_y)/5;
Double b=s_y-a* (time-5);

Canvas.drawline (0, (float) getroundy (Price1), WIDE/6, (float) getroundy (PRICE2), p);
Canvas.drawline (WIDE/6, (float) getroundy (PRICE2), wide/6+ (WIDE/6) * (time-5)/5, (float) b, p);
}else if (time>10&&time<=15) {

Double s_y = Getroundy (PRICE3);
Double e_y = Getroundy (Price4);
Double a= (s_y-e_y)/5;
Double b=s_y-a* (TIME-10);

Canvas.drawline (0, (float) getroundy (Price1), WIDE/6, (float) getroundy (PRICE2), p);
Canvas.drawline (WIDE/6, (float) getroundy (price2), WIDE/3, (float) getroundy (price3), p);
Canvas.drawline (WIDE/3, (float) getroundy (price3), wide/3+ (WIDE/6) * (TIME-10)/5, (float) b, p);
}else if (time>15&&time<=20) {

Double s_y = Getroundy (Price4);
Double e_y = Getroundy (Price5);
Double a= (s_y-e_y)/5;
Double b=s_y-a* (time-15);

Canvas.drawline (0, (float) getroundy (Price1), WIDE/6, (float) getroundy (PRICE2), p);
Canvas.drawline (WIDE/6, (float) getroundy (price2), WIDE/3, (float) getroundy (price3), p);
Canvas.drawline (WIDE/3, (float) getroundy (price3), WIDE/2, (float) getroundy (price4), p);
Canvas.drawline (WIDE/2, (float) getroundy (Price4), wide/2+ (WIDE/6) * (time-15)/5, (float) b, p);
}else if (time>20&&time<=25) {

Double s_y = Getroundy (Price5);
Double e_y = Getroundy (Price6);
Double a= (s_y-e_y)/5;
Double b=s_y-a* (time-20);

Canvas.drawline (0, (float) getroundy (Price1), WIDE/6, (float) getroundy (PRICE2), p);
Canvas.drawline (WIDE/6, (float) getroundy (price2), WIDE/3, (float) getroundy (price3), p);
Canvas.drawline (WIDE/3, (float) getroundy (price3), WIDE/2, (float) getroundy (price4), p);
Canvas.drawline (WIDE/2, (float) getroundy (price4), wide/6*4, (float) getroundy (price5), p);
Canvas.drawline (Wide/6*4, (float) getroundy (price5), wide/6*4+ (WIDE/6) * (time-20)/5, (float) b, p);
}else if (time>25) {

Double s_y = Getroundy (Price6);
Double e_y = Getroundy (Price7);
Double a= (s_y-e_y)/5;
Double b=s_y-a* (time-25);

Canvas.drawline (0, (float) getroundy (Price1), WIDE/6, (float) getroundy (PRICE2), p);
Canvas.drawline (WIDE/6, (float) getroundy (price2), WIDE/3, (float) getroundy (price3), p);
Canvas.drawline (WIDE/3, (float) getroundy (price3), WIDE/2, (float) getroundy (price4), p);
Canvas.drawline (WIDE/2, (float) getroundy (price4), wide/6*4, (float) getroundy (price5), p);
Canvas.drawline (Wide/6*4, (float) getroundy (price5), wide/6*5, (float) getroundy (price6), p);
Canvas.drawline (wide/6*5, (float) getroundy (Price6), wide/6*5+ (WIDE/6) * (time-25)/5, (float) b, p);
}

Canvas.drawline (0, (float) getroundy (Price1), WIDE/6, (float) getroundy (PRICE2), p);
Canvas.drawline (WIDE/6, (float) getroundy (price2), WIDE/3, (float) getroundy (price3), p);
Canvas.drawline (WIDE/3, (float) getroundy (price3), WIDE/2, (float) getroundy (price4), p);
Canvas.drawline (WIDE/2, (float) getroundy (price4), wide/6*4, (float) getroundy (price5), p);
Canvas.drawline (Wide/6*4, (float) getroundy (price5), wide/6*5, (float) getroundy (price6), p);
Canvas.drawline (wide/6*5, (float) getroundy (PRICE6), wide, (float) getroundy (price7), p);


}
}

Get the y-axis coordinate point
Private double Getroundy (String str) {
Double D_max = double.parsedouble (Maxprice);
Double d_min = double.parsedouble (Minprice);

return (double) high)-((Double.parsedouble (str)-d_min)/(d_max-d_min)) *high;
Return ((double.parsedouble (str)-d_min)/(d_max-d_min)) *high;
}


Animation asynchronous task
private int time=0;
public class Task extends asynctask{

Private Handler Handler;
Public task (Handler Handler) {
This.handler=handler;
}

@Override
Protected Object doinbackground (object[] params) {

for (int i=1;i<31;i++) {
try {
Time=i;
Handler.sendemptymessage (1);
Thread.Sleep ((Long) (600/30));
}catch (Exception p) {
P.printstacktrace ();
}
}
Handler.sendemptymessage (2);
return null;
}
}


Accept the message Refresh interface
Private Handler handler=new Handler () {
@Override
public void Handlemessage (Message msg) {
Super.handlemessage (msg);
Switch (msg.what) {
Case 1:
Invalidate ();
Break
Case 2:
if (a!=null) {
A.cancel (TRUE);
A=null;
}
Break
}
}
};

Private Asynctask A;

Start animation
public void Start () {
A=new task (handler);
A.execute ();
}

End Animation manually
public void Stop () {
if (a!=null) {
A.cancel (TRUE);
A=null;
}
time=0;
Invalidate ();
}

}

Android Custom View: Line chart (with animation effect)