東京五輪エンブレム for Android

瞬発力で作ってみました

TokyoOlympicLogo.java

public class TokyoOlympicLogo extends View {

    public TokyoOlympicLogo(Context context) {
        super(context);
    }

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

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

    @Override
    protected void onDraw(Canvas canvas) {
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        RectF rectF;

        // 左側のゴールド
        paint.setColor(0xffb08e47);
        rectF = new RectF(0, 0, getWidth() / 3f, getHeight() / 2f);
        canvas.drawRect(rectF, paint);

        // 右側のシルバー
        paint.setColor(0xffb4b3b4);
        rectF = new RectF(getWidth() * 2 / 3f, getHeight() / 2f, getWidth(), getHeight());
        canvas.drawRect(rectF, paint);

        // 中央の白
        paint.setColor(0xffffffff);
        canvas.drawCircle(getWidth() / 2f, getHeight() / 2f, getWhiteCircleRadius(), paint);

        // 中央のグレー
        paint.setColor(0xff363838);
        rectF = new RectF(getWidth() / 3f, 0, getWidth() * 2 / 3f, getHeight());
        canvas.drawRect(rectF, paint);

        // 右上の赤
        paint.setColor(0xffd7151a);
        canvas.drawCircle(getWidth() * 5 / 6f, getHeight() / 6f, getHeight() / 6f, paint);
    }

    private float getWhiteCircleRadius() {
        float centerX = getWidth() / 2f;
        float centerY = getHeight() / 2f;
        float x = getWidth() / 3f;
        float y = 0;
        return (float) Math.sqrt((centerX - x) * (centerX - x) + (centerY - y) * (centerY - y));
    }
}