For Android, the background of a button or imagebutton is transparent and transparent.

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• The background of a button or imagebutton is transparent or translucent.
• Set the background image transparency (ultra-simple)

The background of a button or imagebutton is transparent or translucent. <button Android: Background = "# e0000000".../>
Transparent <button Android: Background = "#00000000".../>

The color and opacity (alpha) values are expressed in hexadecimal notation. The value range of any color is 0 to 255 (00 to ff ). For Alpha, 00 indicates completely transparent, and FF indicates completely opaque. The expression order is "aabbggrr", where "AA = Alpha" (00 to ff); "BB = Blue" (00 to ff ); "Gg = green" (00 to ff); "RR = red" (00 to ff ). For example, if you want to apply a blue opacity of 50% to a stack, specify the following value: 7fff0000

Set the background image transparency (ultra-simple)

JavaCode

1. View v = findviewbyid (R. Id. content); // locate the ID of layout where you want to set a transparent background
2. V. getbackground (). setalpha (100); // 0 ~ 255 transparency Value