Android-透明度-百分比or十六进制转换

透明度十六进制

100% FF

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99% FC

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98% FA

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97% F7

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96% F5

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95% F2

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94% F0

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93% ED

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92% EB

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91% E8

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90% E6

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89% E3

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88% E0

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87% DE

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86% DB

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85% D9

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84% D6

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83% D4

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82% D1

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81% CF

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80% CC

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79% C9

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78% C7

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77% C4

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76% C2

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75% BF

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74% BD

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73% BA

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72% B8

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71% B5

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70% B3

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69% B0

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68% AD

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67% AB

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66% A8

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65% A6

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64% A3

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63% A1

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62% 9E

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61% 9C

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60% 99

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59% 96

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57% 94

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56% 91

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56% 8F

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55% 8C

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54% 8A

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53% 87

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52% 85

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51% 82

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50% 80

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49% 7D

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48% 7A

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47% 78

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46% 75

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45% 73

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44% 70

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43% 6E

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42% 6B

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41% 69

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40% 66

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39% 63

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38% 61

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37% 5E

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36% 5C

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35% 59

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34% 57

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33% 54

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32% 52

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31% 4F

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30% 4D

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28% 4A

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28% 47

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27% 45

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26% 42

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25% 40

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24% 3D

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23% 3B

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22% 38

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21% 36

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20% 33

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19% 30

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18% 2E

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17% 2B

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16% 29

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15% 26

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14% 24

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13% 21

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12% 1F

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11% 1C

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10% 1A

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9% 17

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8% 14

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7% 12

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6% 0F

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5% 0D

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4% 0A

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3% 08

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2% 05

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1% 03

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0% 00

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透明度百分比和十六进制对应关系计算方法

    @Test

    public void rgba() throws Exception {

        System.out.println("透明度 | 十六进制");

        System.out.println("---- | ----");

        for (double i = 1; i >= 0; i -= 0.01) {

            i = Math.round(i * 100) / 100.0d;

            int alpha = (int) Math.round(i * 255);

            String hex = Integer.toHexString(alpha).toUpperCase();

            if (hex.length() == 1) hex = "0" + hex;

            int percent = (int) (i * 100);

            System.out.println(String.format("%d%% | %s", percent, hex));

        }

    }