ios中颜色和android中的颜色对比转换

ios：r,g,b,alpha

android:#aarrggbb

rgb直接对应，转成16进制就可以了

alpha：alpha_android = alpha_ios*255转成16进制

alpha值的转换对应关系：

100% — FF
99% — FC  98% — FA  97% — F7  96% — F5  95% — F2
94% — F0  93% — ED  92% — EB  91% — E8  90% — E6
89% — E3  88% — E0  87% — DE  86% — DB  85% — D9
84% — D6  83% — D4  82% — D1  81% — CF  80% — CC
79% — C9  78% — C7  77% — C4  76% — C2  75% — BF
74% — BD  73% — BA  72% — B8  71% — B5  70% — B3
69% — B0  68% — AD  67% — AB  66% — A8  65% — A6
64% — A3  63% — A1  62% — 9E  61% — 9C  60% — 99
59% — 96  58% — 94  57% — 91  56% — 8F  55% — 8C
54% — 8A  53% — 87  52% — 85  51% — 82  50% — 80
49% — 7D  48% — 7A  47% — 78  46% — 75  45% — 73
44% — 70  43% — 6E  42% — 6B  41% — 69  40% — 66
39% — 63  38% — 61  37% — 5E  36% — 5C  35% — 59
34% — 57  33% — 54  32% — 52  31% — 4F  30% — 4D
29% — 4A  28% — 47  27% — 45  26% — 42  25% — 40
24% — 3D  23% — 3B  22% — 38  21% — 36  20% — 33
19% — 30  18% — 2E  17% — 2B  16% — 29  15% — 26
14% — 24  13% — 21  12% — 1F  11% — 1C  10% — 1A
 9% — 17   8% — 14   7% — 12   6% — 0F   5% — 0D
 4% — 0A   3% — 08   2% — 05   1% — 03   0% — 00