Android M Light and Dark status bar programmatically - how to make it dark again?
I base on @Aracem and @Carlos Hernández Gil but I think it will easy to understand if we use bitwise XOR (^ operator in Java)
private void setLightStatusBar(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int flags = activity.getWindow().getDecorView().getSystemUiVisibility(); // get current flag
flags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // add LIGHT_STATUS_BAR to flag
activity.getWindow().getDecorView().setSystemUiVisibility(flags);
activity.getWindow().setStatusBarColor(Color.GRAY); // optional
}
}
private void clearLightStatusBar(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int flags = activity.getWindow().getDecorView().getSystemUiVisibility(); // get current flag
flags = flags ^ View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // use XOR here for remove LIGHT_STATUS_BAR from flags
activity.getWindow().getDecorView().setSystemUiVisibility(flags);
activity.getWindow().setStatusBarColor(Color.GREEN); // optional
}
}
Explain
First, look at SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
and setSystemUiVisibility
/**
* Flag for {@link #setSystemUiVisibility(int)}: Requests the status bar to draw in a mode that
* is compatible with light status bar backgrounds.
*/
public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR = 0x00002000;
public void setSystemUiVisibility(int visibility) {
if (visibility != mSystemUiVisibility) {
mSystemUiVisibility = visibility;
...
}
}
I think 2 lines code below is quite hard to understand
flags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // for set light status bar
flags = flags ^ View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // for clear light status bar
At first look, I just think we can use simple like
flags = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; // for set light status bar
flags = 0; // for clear light status bar (0 <=> LIGHT_STATUS_BAR <=> default systemUiVisibility)
But we should use |
and ^
because
Example, we want to set both status bar and navigationbar to light, then we will use
flags = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
activity.getWindow().getDecorView().setSystemUiVisibility(flags);
When we don't want status bar is light anymore, we can use
flags = View.View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
activity.getWindow().getDecorView().setSystemUiVisibility(flags);
OR
flags = activity.getWindow().getDecorView().getSystemUiVisibility();
flags = flags ^ View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
activity.getWindow().getDecorView().setSystemUiVisibility(flags);
To know more why we use |
and ^
, I think the tutorial below may help
https://medium.com/@JakobUlbrich/flag-attributes-in-android-how-to-use-them-ac4ec8aee7d1
Here is my understand. Hope this help
According to Nick Butcher's project "Plaid"
public static void clearLightStatusBar(@NonNull View view) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int flags = view.getSystemUiVisibility();
flags &= ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
view.setSystemUiVisibility(flags);
}
}
You can find this file here.
The way I switched light and dark for APIs 23-30 was a little different than these. This is a kotlin version
Since I was using Compose with the Crossfade animation to change themes, in some cases would call this function twice, hence making xor
undo itself. An alternative is an inverse or
operation. My light theme switcher-thing ended up looking like this
@Suppress("DEPRECATION")
fun invertInsets(darkTheme: Boolean, window: Window) {
if (Build.VERSION.SDK_INT >= 30) {
//Correct way of doing things
val statusBar = APPEARANCE_LIGHT_STATUS_BARS
val navBar = APPEARANCE_LIGHT_NAVIGATION_BARS
if (!darkTheme) {
window.insetsController?.setSystemBarsAppearance(statusBar, statusBar)
window.insetsController?.setSystemBarsAppearance(navBar, navBar)
} else {
window.insetsController?.setSystemBarsAppearance(0, statusBar)
window.insetsController?.setSystemBarsAppearance(0, navBar)
}
} else {
// Does bitwise operations (or to add, inverse or to remove)
// This is depreciated but the new version is API 30+ so I should have this here
val flags = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR or
if (Build.VERSION.SDK_INT >= 26) View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR else 0
if (!darkTheme) {
window.decorView.systemUiVisibility =
window.decorView.systemUiVisibility or flags
} else {
window.decorView.systemUiVisibility =
(window.decorView.systemUiVisibility.inv() or flags).inv()
}
}
}
The bit for API 30+ is what's not depreciated, but realistically not many phones are at API 30 so there's also the bit for lower APIs
It just calculates flags (since setting LIGHT_NAVIGATION_BARS
is API 26+) beforehand for conciseness and then either definitively sets or resets those exact flags. No and
or xor
funny buisiness. or
will always set the flags to 1
, and the inverse or thing will always set the flags to 0
. This is only possible because both SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
and SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR
are one bit, however. Otherwise it would probably need to use xor
.
The solution posted by @Aracem is valid but, doesn't work if you try change also the background color of the status bar. In my case I do it in the following way.
To enable windowLightStatusBar(programatically,inside a Utils class for example):
public static void setLightStatusBar(View view,Activity activity){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int flags = view.getSystemUiVisibility();
flags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
view.setSystemUiVisibility(flags);
activity.getWindow().setStatusBarColor(Color.WHITE);
}
}
To restore to StatusBar to the previous state:
public static void clearLightStatusBar(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
Window window = activity.getWindow();
window.setStatusBarColor(ContextCompat
.getColor(activity,R.color.colorPrimaryDark));
}
}
Restoring the color of the status bar is enough, it restores also the icons colors. VERY IMPORTANT: The restore operation will not occur until the view used in setLightStatusBar(View view..) dissapears(that is, view.getVisibility()==GONE|INVISIBLE) from the screen.