折线图以及渐变 - JAVA

strTitle){ XLabel=XLabels; YLabel=YLabels; Data=AllData; Title=strTitle; } @Override protected void onDraw(Canvas canvas){ super.onDraw(canvas);//重写onDraw方法 canvas.drawColor(Color.DKGRAY);//设置背景颜色 Paint paint = null; Paint paint2= new Paint(); paint2.setStyle(Paint.Style.STROKE); paint2.setAntiAlias(true);//去锯齿 paint2.setColor(Color.BLUE);//颜色 Paint paint1=new Paint(); paint1.setStyle(Paint.Style.STROKE); paint1.setAntiAlias(true);//去锯齿 paint1.setColor(Color.GREEN); paint = paint1; paint.setTextSize(12); //设置轴文字大小 /* 设置渐变色颜色是改变的 */ Shader mShader = new LinearGradient(0, 0, 100, 100, new int[] { Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW, Color.LTGRAY }, null, Shader.TileMode.REPEAT); // 一个材质,打造出一个线性梯度沿著一条线。 paint.setShader(mShader); //设置Y轴 canvas.drawLine(XPoint, YPoint-YLength, XPoint, YPoint, paint); //轴线 for(int i=0;i*YScale0&&YCoord(Data[i-1])!=-999&&YCoord(Data[i])!=-999) //保证有效数据 canvas.drawLine(XPoint+(i-1)*XScale, YCoord(Data[i-1]),XPoint+i*XScale, YCoord(Data[i]), paint); canvas.drawCircle(XPoint+i*XScale,YCoord(Data[i]), 2, paint); } catch(Exception e) { } } canvas.drawLine(XPoint+XLength,YPoint,XPoint+XLength-6,YPoint-3,paint); //箭头 canvas.drawLine(XPoint+XLength,YPoint,XPoint+XLength-6,YPoint+3,paint); paint.setTextSize(16); canvas.drawText(Title, 150, 50, paint); } private int YCoord(String y0) //计算绘制时的Y坐标，无数据时返回-999 { int y; try { y=Integer.parseInt(y0); } catch(Exception e) { return -999; //出错则返回-999 } try { return YPoint-y*YScale/Integer.parseInt(YLabel[1]); } catch(Exception e) { } return y; } }

java:

 package com.example.test_chart; 
 
 
import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 
 
 
public class MainActivity extends Activity { 
 
 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
 
ChartView myView=new ChartView(this); 
myView.SetInfo( 
       new String[]{"7-11","7-12","7-13","7-14","7-15","7-16","7-17"},   //X轴刻度  
       new String[]{"","50","100","150","200","250"},   //Y轴刻度  
       new String[]{105+"",203+"",100+"",46+"",95+"",80+"",102+""},  //数据  
       "图标的标题" 
); 
 
 
setContentView(myView); 
} 
 
 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
// Inflate the menu; this adds items to the action bar if it is present.  
getMenuInflater().inflate(R.menu.activity_main, menu); 
return true; 
} 
 
 
} 

package com.example.test_chart;


import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;


public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

ChartView myView=new ChartView(this);
myView.SetInfo(
       new String[]{"7-11","7-12","7-13","7-14","7-15","7-16","7-17"},   //X轴刻度
       new String[]{"","50","100","150","200","250"},   //Y轴刻度
       new String[]{105+"",203+"",100+"",46+"",95+"",80+"",102+""},  //数据
       "图标的标题"
);


setContentView(myView);
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
g

折线图以及渐变 (二)