public static void setLightStatusBar(@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);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle state) {
final View flagsView = inflater.inflate(R.layout.fragment_flags, container, false);
mLowProfileCheckBox = (CheckBox) flagsView.findViewById(R.id.flag_enable_lowprof);
mHideNavCheckbox = (CheckBox) flagsView.findViewById(R.id.flag_hide_navbar);
mHideStatusBarCheckBox = (CheckBox) flagsView.findViewById(R.id.flag_hide_statbar);
mImmersiveModeCheckBox = (CheckBox) flagsView.findViewById(R.id.flag_enable_immersive);
mImmersiveModeStickyCheckBox =
(CheckBox) flagsView.findViewById(R.id.flag_enable_immersive_sticky);
Button toggleFlagsButton = (Button) flagsView.findViewById(R.id.btn_changeFlags);
toggleFlagsButton.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View view) {
toggleUiFlags();
}
});
Button presetsImmersiveModeButton = (Button) flagsView.findViewById(R.id.btn_immersive);
presetsImmersiveModeButton.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View view) {
// For immersive mode, the FULLSCREEN, HIDE_HAVIGATION and IMMERSIVE
// flags should be set (you can use IMMERSIVE_STICKY instead of IMMERSIVE
// as appropriate for your app). The LOW_PROFILE flag should be cleared.
// Immersive mode is primarily for situations where the user will be
// interacting with the screen, like games or reading books.
int uiOptions = flagsView.getSystemUiVisibility();
uiOptions &= ~View.SYSTEM_UI_FLAG_LOW_PROFILE;
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
uiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
uiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE;
uiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
flagsView.setSystemUiVisibility(uiOptions);
dumpFlagStateToLog(uiOptions);
// The below code just updates the checkboxes to reflect which flags have been set.
mLowProfileCheckBox.setChecked(false);
mHideNavCheckbox.setChecked(true);
mHideStatusBarCheckBox.setChecked(true);
mImmersiveModeCheckBox.setChecked(true);
mImmersiveModeStickyCheckBox.setChecked(false);
}
});
Button presetsLeanbackModeButton = (Button) flagsView.findViewById(R.id.btn_leanback);
presetsLeanbackModeButton.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View view) {
// For leanback mode, only the HIDE_NAVE and HIDE_STATUSBAR flags
// should be checked. In this case IMMERSIVE should *not* be set,
// since this mode is left as soon as the user touches the screen.
int uiOptions = flagsView.getSystemUiVisibility();
uiOptions &= ~View.SYSTEM_UI_FLAG_LOW_PROFILE;
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
uiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
uiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE;
uiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
flagsView.setSystemUiVisibility(uiOptions);
dumpFlagStateToLog(uiOptions);
// The below code just updates the checkboxes to reflect which flags have been set.
mLowProfileCheckBox.setChecked(false);
mHideNavCheckbox.setChecked(true);
mHideStatusBarCheckBox.setChecked(true);
mImmersiveModeCheckBox.setChecked(false);
mImmersiveModeStickyCheckBox.setChecked(false);
}
});
// Setting these flags makes the content appear under the navigation
// bars, so that showing/hiding the nav bars doesn't resize the content
// window, which can be jarring.
int uiOptions = flagsView.getSystemUiVisibility();
uiOptions |= View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
uiOptions |= View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
uiOptions |= View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
flagsView.setSystemUiVisibility(uiOptions);
return flagsView;
}
/** Detects and toggles immersive mode (also known as "hidey bar" mode). */
public void toggleUiFlags() {
// BEGIN_INCLUDE (get_current_ui_flags)
// The "Decor View" is the parent view of the Activity. It's also conveniently the easiest
// one to find from within a fragment, since there's a handy helper method to pull it, and
// we don't have to bother with picking a view somewhere deeper in the hierarchy and calling
// "findViewById" on it.
View decorView = getActivity().getWindow().getDecorView();
int uiOptions = decorView.getSystemUiVisibility();
int newUiOptions = uiOptions;
// END_INCLUDE (get_current_ui_flags)
// BEGIN_INCLUDE (toggle_lowprofile_mode)
// Low profile mode doesn't resize the screen at all, but it covers the nav & status bar
// icons with black so they're less distracting. Unlike "full screen" and "hide nav bar,"
// this mode doesn't interact with immersive mode at all, but it's instructive when running
// this sample to observe the differences in behavior.
if (mLowProfileCheckBox.isChecked()) {
newUiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
} else {
newUiOptions &= ~View.SYSTEM_UI_FLAG_LOW_PROFILE;
}
// END_INCLUDE (toggle_lowprofile_mode)
// BEGIN_INCLUDE (toggle_fullscreen_mode)
// When enabled, this flag hides non-critical UI, such as the status bar,
// which usually shows notification icons, battery life, etc
// on phone-sized devices. The bar reappears when the user swipes it down. When immersive
// mode is also enabled, the app-drawable area expands, and when the status bar is swiped
// down, it appears semi-transparently and slides in over the app, instead of pushing it
// down.
if (mHideStatusBarCheckBox.isChecked()) {
newUiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
} else {
newUiOptions &= ~View.SYSTEM_UI_FLAG_FULLSCREEN;
}
// END_INCLUDE (toggle_fullscreen_mode)
// BEGIN_INCLUDE (toggle_hidenav_mode)
// When enabled, this flag hides the black nav bar along the bottom,
// where the home/back buttons are. The nav bar normally instantly reappears
// when the user touches the screen. When immersive mode is also enabled, the nav bar
// stays hidden until the user swipes it back.
if (mHideNavCheckbox.isChecked()) {
newUiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
} else {
newUiOptions &= ~View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
}
// END_INCLUDE (toggle_hidenav_mode)
// BEGIN_INCLUDE (toggle_immersive_mode)
// Immersive mode doesn't do anything without at least one of the previous flags
// enabled. When enabled, it allows the user to swipe the status and/or nav bars
// off-screen. When the user swipes the bars back onto the screen, the flags are cleared
// and immersive mode is automatically disabled.
if (mImmersiveModeCheckBox.isChecked()) {
newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE;
} else {
newUiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE;
}
// END_INCLUDE (toggle_immersive_mode)
// BEGIN_INCLUDE (toggle_immersive_mode_sticky)
// There's actually two forms of immersive mode, normal and "sticky". Sticky immersive mode
// is different in 2 key ways:
//
// * Uses semi-transparent bars for the nav and status bars
// * This UI flag will *not* be cleared when the user interacts with the UI.
// When the user swipes, the bars will temporarily appear for a few seconds and then
// disappear again.
if (mImmersiveModeStickyCheckBox.isChecked()) {
newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
} else {
newUiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
}
// END_INCLUDE (toggle_immersive_mode_sticky)
// BEGIN_INCLUDE (set_ui_flags)
// Set the new UI flags.
decorView.setSystemUiVisibility(newUiOptions);
// END_INCLUDE (set_ui_flags)
dumpFlagStateToLog(uiOptions);
}