Develop Reference

Displaying a foreground service below status bar

I'm trying to creat a foreground service window that doesn't cross or display content underneath the statusbar. It looks ok in portrait mode, but once the screen is rotated, the view extends to go even behind the statusbar. Not sure what I'm missing here!
fullscreenCheckerHiddenWindow = LayoutInflater.from(ctx).inflate(R.layout.fullscreen_checker_hidden_window, null);
int flag;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
flag = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
flag = WindowManager.LayoutParams.TYPE_PHONE;
}
fullscreenWindowParams = new WindowManager.LayoutParams(
50,
ViewGroup.LayoutParams.MATCH_PARENT,
flag,
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
PixelFormat.TRANSLUCENT);
fullscreenWindowParams.gravity = Gravity.TOP | Gravity.LEFT;

Blocking status bar in top down swiping

I've a full screen application covering the entire screen, top status bar included.
Since a top / down swipe is enabled to show some options to the user, it happens that swiping from top to down, the status bar is showing (as when you want to see notifications and swipe top down).
Is there a way to avoid this ?

Use type TYPE_SYSTEM_ERROR for WindowManager.LayoutParams, to create hide impossible fullscreen view.
Swipes for show status bar and navigation will be blocked.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mMainLayout = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.activity_fullscreen, null);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
WindowManager.LayoutParams handleParams = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_SYSTEM_ERROR,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
PixelFormat.TRANSLUCENT);
handleParams.gravity = Gravity.TOP;
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
windowManager.addView(mMainLayout, handleParams);
}
And you should be show it after display power on (unlock screen) if needs. Add code:
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);

There are a couple of options. Before the line
super.onCreate(savedInstanceState)
add the following:
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
This should completely get rid of the status bar. Basicaly the feature no title removes the top toolbar, and to ensure fullscreen size we are setting fullscreen flags for height and width.
As far as preventing from swiping at all, there is a trick that can be used. Basically place an invisible view at the top once you are in true fullscreen that prevents any swiping. For example,
View disableStatusBarView = new View(context);
WindowManager.LayoutParams handleParams = new WindowManager.LayoutParams(
WindowManager.LayoutParams.FILL_PARENT,
<height of the status bar>,
// This allows the view to be displayed over the status bar
WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
// this is to keep button presses going to the background window
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
// this is to enable the notification to recieve touch events
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
// Draws over status bar
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
PixelFormat.TRANSLUCENT);
handleParams.gravity = Gravity.TOP;
context.getWindow().addView(disableStatusBarView, handleParams);
This creates an invisible view over the status bar that will receive the touch events and block the events from reaching the status bar, therefore preventing it to be expanded.
Alternatively, and this works the best, is to override the windowFocusChanged method. Essentially you are NOT preventing the status bar from expanding, but YOU ARE preventing use. Because once expanded, it is closed. I say that this works best because with the invisible view methodology, you may want to consider the dimensions of the screen to really make it effective for all device. So there is more work.
First, declare permission in manifest
<uses-permission android:name="android.permission.EXPAND_STATUS_BAR"/>
Then Override onWindowFocusChanged method,
public void onWindowFocusChanged(boolean hasFocus)
{
try
{
if(!hasFocus)
{
Object service = getSystemService("statusbar");
Class<?> statusbarManager = Class.forName("android.app.StatusBarManager");
Method collapse = statusbarManager.getMethod("collapse");
collapse .setAccessible(true);
collapse .invoke(service);
}
}
catch(Exception ex)
{
}
}

Overlay Status bar on android 4.2.2+

I want to overlay android status bar. In my case it is on top. I do not want to overlay or hide navigation bar.
Note: Solution must work on android 4.2.2+. I prefer answers for non-rooted device.
I have searched many SO questions and answers, but none works on 4.2.2.
Below is my code, but it does not consume touch events. That's why status bar opens its panel. And I do not want this.
#Override
public void onCreate() {
super.onCreate();
windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
int statusBarHeight = (int) Math.ceil(25 * getResources().getDisplayMetrics().density);
overlay = new Button(this);
overlay.setBackgroundColor(Color.GREEN);
overlay.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
Log.i("StatusBar", "touched");
return false;
}
});
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.FILL_PARENT,
statusBarHeight,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH|
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
PixelFormat.TRANSLUCENT);
params.gravity = Gravity.TOP | Gravity.RIGHT;
windowManager.addView(overlay, params);
}
#Override
public void onDestroy() {
super.onDestroy();
if (overlay != null) windowManager.removeView(overlay);
}
In main activity I start service:
startService(new Intent(this, StatusBarService.class));
And permission is added in AndroidManifest.xml:
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
And now proof it can be done and it works on 4.2.2:
Play Google - MobiLock
How?
Screenshots:

After try&repeat, this did it for me:
int statusBarHeight = (int) Math.ceil(25 * getResources().getDisplayMetrics().density);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(WindowManager.LayoutParams.FILL_PARENT,
statusBarHeight,
WindowManager.LayoutParams.TYPE_SYSTEM_ERROR,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
PixelFormat.TRANSLUCENT);
It works on 4.2.2 and 4.4.2

We could not prevent the status appearing in full screen mode in kitkat devices, so made a hack which still suits the requirement ie block the status bar from expanding.
For that to work, the app was not made full screen. We put a overlay over status bar and consumed all input events. It prevented the status from expanding.
note:
customViewGroup is custom class which extends any
layout(frame,relative layout etc) and consumes touch event.
to consume touch event override the onInterceptTouchEvent method of
the view group and return true
Updated
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
customViewGroup implementation
Code :
WindowManager manager = ((WindowManager) getApplicationContext()
.getSystemService(Context.WINDOW_SERVICE));
WindowManager.LayoutParams localLayoutParams = new WindowManager.LayoutParams();
localLayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
localLayoutParams.gravity = Gravity.TOP;
localLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|
// this is to enable the notification to recieve touch events
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
// Draws over status bar
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
localLayoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
localLayoutParams.height = (int) (50 * getResources()
.getDisplayMetrics().scaledDensity);
localLayoutParams.format = PixelFormat.TRANSPARENT;
customViewGroup view = new customViewGroup(this);
manager.addView(view, localLayoutParams);
Note not rooting required

Can't you put your app in a notitlebar theme [shouldn't remove the navigation bar] and implement your own view on top that mimics the notification bar look as a container and the rest of the contents would be fragments ?

Prevent status bar for appearing android (modified)

I am implementing a kiosk mode application and i have successfully made the application full-screen without status bar appearance post 4.3 but unable to hide status bar in 4.3 and 4.4 as status-bar appears when we swipe down at the top of the screen.
I have tried to make it full screen by
speciflying the full screen theme in manifest
setting window Flags ie setFlags
setSystemUiVisibility
Possible duplicate but no concrete solution found
Permanently hide Android Status Bar
Finally the thing i want is, how to hide status bar permanently in an activity?? in android 4.3,4.4,5,6versions

We could not prevent the status appearing in full screen mode in kitkat devices, so made a hack which still suits the requirement ie block the status bar from expanding.
For that to work, the app was not made full screen. We put a overlay over status bar and consumed all input events. It prevented the status from expanding.
note:
customViewGroup is custom class which extends any
layout(frame,relative layout etc) and consumes touch event.
to consume touch event override the onInterceptTouchEvent method of
the view group and return true
Updated
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
customViewGroup implementation
Code :
WindowManager manager = ((WindowManager) getApplicationContext()
.getSystemService(Context.WINDOW_SERVICE));
WindowManager.LayoutParams localLayoutParams = new WindowManager.LayoutParams();
localLayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
localLayoutParams.gravity = Gravity.TOP;
localLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|
// this is to enable the notification to recieve touch events
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
// Draws over status bar
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
localLayoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
localLayoutParams.height = (int) (50 * getResources()
.getDisplayMetrics().scaledDensity);
localLayoutParams.format = PixelFormat.TRANSPARENT;
customViewGroup view = new customViewGroup(this);
manager.addView(view, localLayoutParams);

In Android M you have to get an extra permission for making overlays. android.permission.SYSTEM_ALERT_WINDOW is not enough! So I used the code from the answer of Abhimaan within disableStatusBar() and had to make an intent to open the right settings dialog. I also added removing view in onDestroy() in order to enable status bar when the app exits. I also reduced the overlay height to 40 as it seems to be enough. Code works with 5.1 and 6.0 here.
public static final int OVERLAY_PERMISSION_REQ_CODE = 4545;
protected CustomViewGroup blockingView = null;
#Override
protected void onDestroy() {
super.onDestroy();
if (blockingView!=null) {
WindowManager manager = ((WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE));
manager.removeView(blockingView);
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (!Settings.canDrawOverlays(this)) {
Toast.makeText(this, "Please give my app this permission!", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,Uri.parse("package:" + getPackageName()));
startActivityForResult(intent, OVERLAY_PERMISSION_REQ_CODE);
} else {
disableStatusBar();
}
}
else {
disableStatusBar();
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == OVERLAY_PERMISSION_REQ_CODE) {
if (!Settings.canDrawOverlays(this)) {
Toast.makeText(this, "User can access system settings without this permission!", Toast.LENGTH_SHORT).show();
}
else
{ disableStatusBar();
}
}
}
protected void disableStatusBar() {
WindowManager manager = ((WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE));
WindowManager.LayoutParams localLayoutParams = new WindowManager.LayoutParams();
localLayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
localLayoutParams.gravity = Gravity.TOP;
localLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
// this is to enable the notification to receive touch events
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
// Draws over status bar
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
localLayoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
localLayoutParams.height = (int) (40 * getResources().getDisplayMetrics().scaledDensity);
localLayoutParams.format = PixelFormat.TRANSPARENT;
blockingView = new CustomViewGroup(this);
manager.addView(blockingView, localLayoutParams);
}

For a project I worked on I had found a solution for this but it took a long time. Various threads on Stackoverflow and elsewhere helped me to come up with it. It was a work around on Android M but it worked perfectly. As someone asked for it so I thought I should post it here if it can benefit anyone.
Now that its been a while, I don't remember all the details, but the CustomViewGroup is the class which overrides the main ViewGroup, and detects that a user has swiped from top to show the status bar. But we didn't want to show it, so the user's intercept was detected and any further action was ignored, i.e. Android OS won't get a signal to open the hidden status bar.
And then the methods to show and hide the status bar are also included which you can copy/paste as is in your code where you want to show/hide the status bar.
/**
* This class creates the overlay on the status bar which stops it from expanding.
*/
public static class CustomViewGroup extends ViewGroup {
public CustomViewGroup(Context context) {
super(context);
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
Log.v("customViewGroup", "********** Status bar swipe intercepted");
return true;
}
}
public static void allowStatusBarExpansion(Context context) {
CustomViewGroup view = new CustomViewGroup(context);
WindowManager manager = ((WindowManager) context.getApplicationContext()
.getSystemService(Context.WINDOW_SERVICE));
manager.removeView(view);
}
// Stop expansion of the status bar on swipe down.
public static void preventStatusBarExpansion(Context context) {
WindowManager manager = ((WindowManager) context.getApplicationContext()
.getSystemService(Context.WINDOW_SERVICE));
Activity activity = (Activity) context;
WindowManager.LayoutParams localLayoutParams = new WindowManager.LayoutParams();
localLayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
localLayoutParams.gravity = Gravity.TOP;
localLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
// this is to enable the notification to receive touch events
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
// Draws over status bar
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
localLayoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
//http://stackoverflow.com/questions/1016896/get-screen-dimensions-in-pixels
int resId = activity.getResources().getIdentifier("status_bar_height", "dimen", "android");
int result = 0;
if (resId > 0) {
result = activity.getResources().getDimensionPixelSize(resId);
}
localLayoutParams.height = result;
localLayoutParams.format = PixelFormat.TRANSPARENT;
CustomViewGroup view = new CustomViewGroup(context);
manager.addView(view, localLayoutParams);
}

Android 4.4 hide navbar/statusbar using Accessibility service & service

I have implemented some features by integrating accessibility service for my application.
I currently have a 'system overlay' ImageView that can detect TouchEvent's. however i have seen it done that immersive mode, hiding the statusbar or navbar is possible without root.
i need to beable to access the view of my touch detection window in order to process any accessibility
My Accessibility service contains:
...
#Override
public void onServiceConnected() {
serviceInstance = this;
}
...
my touch detector:
...
WindowManager wm;
private MyAccessibilityService myAccessibilityService;
private ImageView mTouchDetector;
#Override
public void onCreate() {
super.onCreate();
myAccessibilityService = MyAccessibilityService.getSharedInstance();
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
100,
100,
0, 0,
WindowManager.LayoutParams.TYPE_PHONE,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, debugMode());
params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
wm = (WindowManager) getSystemService(WINDOW_SERVICE);
wm.addView(mTouchDetector, params);
}
...

I have partially solved this problem, however having some trouble with the back button, check here to see if it gets resolved.
create the service as normal but add these flags to the overlay:
to the window manager:
TYPE_PRIORITY_PHONE, FLAG_FULLSCREEN |
FLAG_NOT_TOUCH_MODAL
to the view:
int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
FloatingView.setSystemUiVisibility(uiOptions);
Android floating window with hidden statusbar Accessibility problems