Android Open Source - PercentViewExample Percent View

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The source code is released under:

CC0 1.0 Universal Statement of Purpose The laws of most jurisdictions throughout the world automatically confer exclusive Copyright and Related Rights (defined below) upon the creator and subsequent...

Java Source Code

package co.uk.captainstu72.example.percentview;
//from  w  ww  .ja  v  a 2s  .  c  o  m
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

//modified version of the code provided on this SO thread.
//http://stackoverflow.com/questions/19731261/android-draw-circle-with-2-colors-pie-chart
//Answer originally by Sherif elKhatib.

public class PercentView extends View {
  
  final static String TAG = "PercentView";
    
    static Paint paint = new Paint();
    static Paint bgpaint = new Paint();
    static RectF rect = new RectF();
    static float percentage = 0;
    static int size = 0;
    static Boolean outlineOnly = false;
    static int width = 0;
    static int shortAxis = 0;
    static int longAxis = 0;
    static int left = 0;
    static int bgColour = 0;
    static int highColour = 0;
    static int medColour = 0;
    static int lowColour = 0;

    public PercentView (Context context) {
        super(context);
        init();
    }
    
    public PercentView (Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    
    public PercentView (Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }
    
    private void init() {
        paint = new Paint();
        paint.setAntiAlias(true);
        paint.setStyle(Paint.Style.FILL);
        
        bgpaint = new Paint();
        bgpaint.setAntiAlias(true);
        bgpaint.setStyle(Paint.Style.FILL);
        
        rect = new RectF();
    }
    
    //This is my edited version
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        
        //set out colours if they were not set by user
        if (bgColour == 0) {
          bgColour = Color.parseColor("#ffe5e5e5");
        }        
        bgpaint.setColor(bgColour);
        if (highColour == 0) {
          highColour = Color.parseColor("#ff57d78d");
        }
        if (medColour == 0) {
          medColour = Color.parseColor("#fffcd12c");
        }
        if (lowColour == 0) {
          lowColour = Color.parseColor("#fffb2a52");
        }   

        //work out what the long and short axis should be. This will be useful if the view is set to match
        //the size of a parent. This will help set the left so the circles are drawn in the middle
        if (getHeight() > getWidth()) {
            shortAxis = getWidth();
            longAxis = getHeight();
        } else {
            shortAxis = getHeight();
            longAxis = getWidth();
        }
        
        Log.i(TAG,"shortAxis: " + shortAxis + " / longAxis: " + longAxis);
        
        //get the left point - Take the short from the long and divide by 2. This will give an equal margin (hopefully)
        left = (longAxis - shortAxis) / 2;
        
        width = shortAxis;

        if (outlineOnly) {
          drawOutlineMode(canvas);
        } else {
          drawPieMode(canvas);
        }
        
    }
    
    private void drawOutlineMode(Canvas canvas) {
        //draw background circle anyway
        
        //make sure we have a size - This is the width of the percentage line.
        if (size == 0) {
            size = 10;
        }   
        
        Log.i(TAG,"left: " + left + "/ shortAxis: " + shortAxis + "/ longAxis: " + longAxis);
        
        
        int top = 0;
        
      rect.set(left, top, left+width, top + width); 
        canvas.drawArc(rect, -90, 360, true, bgpaint); //and lets fill it right out to the edge.

        if(percentage != 0) {
            
          int iPercentage = Float.valueOf(percentage * 100).intValue(); //(percentage * 100);
          Log.i(TAG,"Percentage: " + iPercentage);
            if (iPercentage > 66)  {
                paint.setColor(highColour);          
            } else if (iPercentage > 33) {
                paint.setColor(medColour);          
            } else {
                paint.setColor(lowColour);          
            }      
          
            rect.set(left, top, left+width, top + width); 
            canvas.drawArc(rect, -90, (float) (360*percentage), true, paint);
        }
        
        left = left + size/2;
        top = size/2;
        width = width-size;
        rect.set(left, top, left+width, top + width); 
        canvas.drawArc(rect, -90, 360, true, bgpaint);
    }
    
    private void drawPieMode (Canvas canvas) {
  // This is the original SO answer with my edit.
      
      int iPercentage = Float.valueOf(percentage * 100).intValue(); //(percentage * 100);
      Log.i(TAG,"Percentage: " + iPercentage);
        if (iPercentage > 66)  {
            paint.setColor(highColour);          
        } else if (iPercentage > 33) {
            paint.setColor(medColour);          
        } else {
            paint.setColor(lowColour);          
        }    
        
    //draw background circle anyway
    int top = 0;
        rect.set(left, top, left+width, top + width); 
    canvas.drawArc(rect, -90, 360, true, bgpaint);
    if(percentage!=0) {
        canvas.drawArc(rect, -90, (360*percentage), true, paint);
    }
    }   
     
    public void setPercentage(float percentage) {
        this.percentage = percentage / 100;
        invalidate();
    }
    
    public void setOutlineSize(int size) {
        this.size = size;
        invalidate();
    }
    
    public void setOutlineOnly(boolean outlineOnly) {
        this.outlineOnly = outlineOnly;
        invalidate();
    }
    
    public void setBackgroundColour(int bgColour) {
      this.bgColour = bgColour;
        invalidate();
    }
    public void setHighColour(int highColour) {
      this.highColour = highColour;
        invalidate();
    }
    public void setMedColour(int medColour) {
      this.medColour = medColour;
        invalidate();
    }
    public void setLowColour(int lowColour) {
      this.lowColour = lowColour;
        invalidate();
    }
}

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