SemiCircleView.java

package com.cooltechworks.semicircletest;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;

/**
 * Created by sharish on 11/1/15.
 */
public class SemiCircleView extends View implements View.OnTouchListener{

    private Paint firstThird, secondThird, thirdThird, bookButtonPaint;
    private RectF firstThirdRect, secondThirdRect, thirdThirdRect;
    private RectF bookButtonRect;
    private Paint textPaint;


    public SemiCircleView(Context context) {
        super(context);
        init();
    }

    public SemiCircleView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public SemiCircleView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    public void init() {

        firstThird = new Paint();
        firstThird.setColor(Color.RED);
        firstThird.setStrokeWidth(30);
        firstThird.setStyle(Paint.Style.FILL);

        secondThird = new Paint();
        secondThird.setColor(Color.GREEN);
        secondThird.setStrokeWidth(30);
        secondThird.setStyle(Paint.Style.FILL);


        thirdThird = new Paint();
        thirdThird.setColor(Color.BLUE);
        thirdThird.setStrokeWidth(30);
        thirdThird.setStyle(Paint.Style.FILL);

        bookButtonPaint = new Paint();
        bookButtonPaint.setColor(Color.YELLOW);

        firstThirdRect = new RectF();

        secondThirdRect = new RectF();

        thirdThirdRect = new RectF();

        bookButtonRect= new RectF();

        textPaint = new Paint();

        setOnTouchListener(this);


    }

    public void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        firstThirdRect.left = 0;
        firstThirdRect.right = getWidth();
        firstThirdRect.bottom = getHeight()* 2;
        firstThirdRect.top = 0;

        secondThirdRect.left = 0;
        secondThirdRect.right = getWidth();
        secondThirdRect.bottom = getHeight()* 2;
        secondThirdRect.top = 0;

        thirdThirdRect.left = 0;
        thirdThirdRect.right = getWidth();
        thirdThirdRect.bottom = getHeight() * 2;
        thirdThirdRect.top = 0;

        bookButtonRect.left = getWidth() * 0.25f;
        bookButtonRect.right = getWidth() * 0.75f;
        bookButtonRect.bottom = getHeight() * 1.5f;
        bookButtonRect.top = getHeight() * 0.5f;

        textPaint.setColor(Color.BLACK);
        textPaint.setTextSize(30);


        canvas.drawArc(firstThirdRect, 180f, 60f, true, firstThird);
        canvas.drawArc(secondThirdRect, 240f, 60f, true, secondThird);
        canvas.drawArc(thirdThirdRect, 300f, 60f, true, thirdThird);
        canvas.drawArc(bookButtonRect, 180f, 180f, true, bookButtonPaint);

        canvas.drawText("Book", getWidth() * 0.45f, getHeight() * 0.85f, textPaint);
        canvas.drawText("Sedan", getWidth() * 0.42f, getHeight() * 0.30f, textPaint);
        canvas.drawText("Mini", getWidth() * 0.05f, getHeight() * 0.85f, textPaint);
        canvas.drawText("SUV", getWidth() * 0.8f, getHeight() * 0.85f, textPaint);





    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {

        if(event.getAction() == MotionEvent.ACTION_DOWN) {

            float x = event.getX();
            float y = event.getY();

            if(x > getWidth() * .25f && x < getWidth() * .75f &&y > getHeight() * 0.5f) {

                Toast.makeText(getContext(), "Book button tapped", Toast.LENGTH_SHORT).show();
            }
        }

        return false;
    }
}