android 半透明色值

android 半透明色值"/>

android 半透明色值

透明度表格

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));

}

}

不透明度表格

不透明度百分比和十六进制对应关系计算方法：public void rgba() throws Exception {

System.out.println("不透明度 | 十六进制");

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

for (int percent = 0; percent <= 100; percent++) {

int alpha = Math.round(255 * percent * 1.0f / 100f);

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

if (hex.length() == 1) {

hex = "0" + hex;

}

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

}

}

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