根据日期计算星座的算法

private String getAstro(int month, int day) {

String[] astro = new String[] { "摩羯座", "水瓶座", "双鱼座", "白羊座", "金牛座",

"双子座", "巨蟹座", "狮子座", "处女座", "天秤座", "天蝎座", "射手座", "摩羯座" };

int[] arr = new int[] { 20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22 };// 两个星座分割日

int index = month;

// 所查询日期在分割日之前，索引-1，否则不变

if (day < arr[month - 1]) {

index = index - 1;

}

// 返回索引指向的星座string

return astro[index];

}

private void test() {

Log.e("12-22", getAstro(12, 22));

Log.e("12-21", getAstro(12, 21));

Log.e("12-19", getAstro(12, 19));

Log.e("1-22", getAstro(1, 22));

}