brightness
Change brightness of background-image?
You can have more layers in the “background” like this: .someObj{ background: linear-gradient(rgba(255,255,255,0.5), rgba(255,255,255,0.5)), url(myBgImage.png); } This will put 50% white over the original image making it brighter. Linear-gradient function has to be used, otherwise it doesn’t work. Alternatively use: .someObj:after{ content:”; background:rgba(255,255,255,.5); … } and this is better for code maintainability.
JavaScript Calculate brighter colour
function increase_brightness(hex, percent){ // strip the leading # if it’s there hex = hex.replace(/^\s*#|\s*$/g, ”); // convert 3 char codes –> 6, e.g. `E0F` –> `EE00FF` if(hex.length == 3){ hex = hex.replace(/(.)/g, ‘$1$1’); } var r = parseInt(hex.substr(0, 2), 16), g = parseInt(hex.substr(2, 2), 16), b = parseInt(hex.substr(4, 2), 16); return ‘#’ + ((0|(1<<8) + … Read more
Change the System Brightness Programmatically
You can use following: // Variable to store brightness value private int brightness; // Content resolver used as a handle to the system’s settings private ContentResolver cResolver; // Window object, that will store a reference to the current window private Window window; In your onCreate write: // Get the content resolver cResolver = getContentResolver(); // … Read more