Android Open Source - MoonCal Moon Day View

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.mooncal;
//www  . j a va2  s  .c o m
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

public class MoonDayView extends View {
  private Path mPath;
  private Path fPath;
  private Paint mPaint,fPaint;
  private RectF outerBounds;
  private double moonPhase=0.;
  private int lunation=0;
  
  public MoonDayView(Context context) {
    super(context);
    prepareDrawable();
  }
  
  public MoonDayView(Context context, AttributeSet attrs) {
    super(context,attrs);
    prepareDrawable();
  }
  
  public void setPhaseLunation(double phase, int lun) {
    moonPhase=phase;
    lunation=lun;
    invalidate();
  }
  
  private void prepareDrawable() {
    Resources r=getResources();
    mPath=new Path();
    fPath=new Path();
    mPaint=new Paint();
    mPaint.setColor(r.getColor(R.color.moonColor));
    mPaint.setAntiAlias(true);
    fPaint=new Paint();
    fPaint.setStyle(Paint.Style.STROKE);
    fPaint.setColor(r.getColor(R.color.frameColor));
    fPaint.setAntiAlias(true);
    outerBounds=new RectF(0,0,256.f,256.f);
  }
  
  private void setupPath(int left, int top, int radius) {
    outerBounds.set(left,top,left+radius,top+radius);
    mPath.reset();
    fPath.reset();
    if(lunation>=0) {
      if(lunation==0) { // New Moon.
        fPath.addArc(outerBounds, 0, 360);
        fPath.close();
      } else if(lunation==1) { // Second quarter
        mPath.addArc(outerBounds, 270, 180);
        mPath.close();
        fPath.set(mPath);
      } else if(lunation==2) { // Full moon
        mPath.addOval(outerBounds, Path.Direction.CCW);
        mPath.close();
        fPath.set(mPath);
      } else if(lunation==3) { // Third quarter
        mPath.addArc(outerBounds, 90, 180);
        mPath.close();
        fPath.set(mPath);
      }
      fPaint.setStrokeWidth(radius/8);
    } else {
      double fraction=moonPhase-Math.floor(moonPhase);
      double theta;
      double ovalWidth;
      int halfArcStart;
      int semiArcStart;
      int semiArcAngles;
      
      if(moonPhase<2.) {
        halfArcStart=270;
        semiArcStart=90;
        if(moonPhase>=1.) {
          semiArcAngles=180;
          fraction = 1.-fraction;
        } else {
          semiArcAngles=-180;
        }
      } else {
        halfArcStart=90;
        semiArcStart=270;
        if(moonPhase<=3.) {
          semiArcAngles=180;
        } else {
          fraction=1.-fraction;
          semiArcAngles=-180;
        }
      }
      mPath.addArc(outerBounds, halfArcStart, 180);
      theta=(Math.PI/2.)*fraction;
      ovalWidth=Math.cos(theta)*radius;
      outerBounds.set((float) (left+(radius-ovalWidth)/2.), top,
          (float) (left+(radius-ovalWidth)/2.+ovalWidth), top+radius);
      mPath.addArc(outerBounds, semiArcStart, semiArcAngles);
      mPath.close();
    }
  }
  
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    int h=canvas.getHeight();
    int w=canvas.getWidth();
    int r=Math.min(w, h);
    int ovalR=(80*r)/100;
    int x=(w-ovalR)/2;
    int y=(h-ovalR)/2;
    
    setupPath(x,y,ovalR);
    if(lunation>=0) {
      canvas.drawPath(fPath,fPaint);
    }
    canvas.drawPath(mPath, mPaint);
  }
}

Java Source Code List

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