Android中如何动态设置颜色透明度（10%-100%）？

Got it, let's walk through exactly how to generate the transparent hex color you need based on your requirements.

Core Concept #

The standard 8-digit hex color format is #<transparency-value><base-color-hex>. Your base color is #bf6116 (so the base hex string without the # is bf6116), and you just need to prepend the corresponding transparency hex value from your provided mapping to get the final color.

Transparency to Hex Mapping (Your Provided Values) #

Here's the mapping clearly laid out for quick reference:

• 100% — FF
• 95% — F2
• 90% — E6
• 85% — D9
• 80% — CC
• 75% — BF
• 70% — B3
• 65% — A6
• 60% — 99
• 55% — 8C
• 50% — 80
• 45% — 73
• 40% — 66
• 35% — 59
• 30% — 4D
• 25% — 40
• 20% — 33
• 15% — 26
• 10% — 1A
• 5% — 0D
• 0% — 00

Example Calculations #

Let's apply this to your base color #bf6116:

• 10% transparency: Take 1A → Final color: #1Abf6116 (note: hex is case-insensitive, so #1abf6116 works too)
• 20% transparency: Take 33 → Final color: #33bf6116
• 75% transparency: Take BF → Final color: #bfbf6116
• 0% transparency: Take 00 → Final color: #00bf6116 (fully transparent)

Quick Cheat Sheet for Your Base Color #

For easy lookup, here are the final colors for common transparency levels:

• 10% → #1Abf6116
• 20% → #33bf6116
• 30% → #4Dbf6116
• 40% → #66bf6116
• 50% → #80bf6116
• 60% → #99bf6116
• 70% → #B3bf6116
• 80% → #CCbf6116
• 90% → #E6bf6116
• 100% → #FFbf6116 (same as original #bf6116 since 100% opacity means no transparency)

If you're implementing this in code (say JavaScript), a simple function could handle this dynamically:

function getTransparentColor(transparencyPercent) {
  const transparencyMap = {
    100: 'FF', 95: 'F2', 90: 'E6', 85: 'D9', 80: 'CC',
    75: 'BF', 70: 'B3', 65: 'A6', 60: '99', 55: '8C',
    50: '80', 45: '73', 40: '66', 35: '59', 30: '4D',
    25: '40', 20: '33', 15: '26', 10: '1A', 5: '0D', 0: '00'
  };
  const baseColor = 'bf6116';
  const transparencyHex = transparencyMap[transparencyPercent];
  return `#${transparencyHex}${baseColor}`;
}

// Usage: getTransparentColor(10) → "#1Abf6116"

内容的提问来源于stack exchange，提问作者Vanraj Ghed