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);
}
Related
I have a custom view that adds a variable filter (light effects, etc) over the entire screen. This runs as a service when the main activity is closed, so the user can change apps etc with the filters running.
The code is effectively:
EffectsView view = new EffectsView();
WindowManager windowManager = (WindowManager) service.getSystemService(Context.WINDOW_SERVICE);
windowManager.addView(view, new Params());
private class Params extends WindowManager.LayoutParams
{
public Params()
{
super();
this.type = WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY;
this.width = WindowManager.LayoutParams.MATCH_PARENT;
this.height = WindowManager.LayoutParams.MATCH_PARENT;
this.flags = 280;
this.format = PixelFormat.TRANSPARENT;
}
}
I'm currently using the flags = 280 parameter as it covers the notification bar, but it doesn't cover the soft nav buttons. This is most noticeable in the App Switcher.
I have tried the using the flag WindowManager.LayoutParams.FLAG_FULLSCREEN, but that doesn't cover the nav buttons or the notification bar.
Is there a way to get the view to cover the nav bar area?
Note: my supported SDK versions are 17+
LockScreenReceiver.java
public class LockScreenReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
//If the screen was just turned on or it just booted up, start your Lock Activity
if(action.equals(Intent.ACTION_SCREEN_OFF) || action.equals(Intent.ACTION_BOOT_COMPLETED))
{
//Create a window manager params
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
| WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSLUCENT);
//makeFullScreen((Activity) context);
WindowManager wm = (WindowManager) context.getSystemService(context.WINDOW_SERVICE);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
final View myView = inflater.inflate(R.layout.my_view, null);
myView.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("TAG", "touch me");
myView.setVisibility(View.GONE);
return true;
}
});
// Add layout to window manager
wm.addView(myView, params);
}
}
}
What i am having:
I have output as shown below, which is a view on click of it, its visibility is gone
What i am trying to do:
I want to hide the bar that has back,center button when the above view is loaded.
How to achieve this?
WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
lp.format = PixelFormat.RGBA_8888;
lp.flags = WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
| WindowManager.LayoutParams.FLAG_FULLSCREEN;
lp.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
lp.height = ViewGroup.LayoutParams.MATCH_PARENT;
lp.width = ViewGroup.LayoutParams.MATCH_PARENT;
int flag = View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
mRootView.setSystemUiVisibility(flag);
mWindowManager.addView(mRootView, getLayoutParams());
Don not use WindowManager.LayoutParams.FLAG_NOT_FOCUSABLEļ¼ this flag will make navigation bar always show. I don't kown why.
You can hide the navigation bar on Android 4.0 and higher using the SYSTEM_UI_FLAG_HIDE_NAVIGATION flag. This snippet hides both the navigation bar and the status bar:
View decorView = getWindow().getDecorView();
// Hide both the navigation bar and the status bar.
// SYSTEM_UI_FLAG_FULLSCREEN is only available on Android 4.1 and higher, but as
// a general rule, you should design your app to hide the status bar whenever you
// hide the navigation bar.
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
source: here
Starting from Android 4.4 KitKat, you can use "immersive" full-screen mode. Here's the detail and some sample codes.
https://developer.android.com/training/system-ui/immersive.html
try with Immersive mode -SYSTEM_UI_FLAG_IMMERSIVE flag for setSystemUiVisibility()
I am trying to overlap system bottom navigation bar using window manager but i can`t do it. I am Using bellow code.I have set gravity to bottom, therefore it show view layer in bottom of my activity view not not overlapping bottom navigation bar.
public void onCreate(Bundle savedInstancestate)
{
super.onCreate(savedInstancestate);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);7
manager = ((WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE));
localLayoutParams = new WindowManager.LayoutParams();
localLayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY;
localLayoutParams.gravity = Gravity.BOTTOM;
localLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|
// this is to enable the notification to recieve touch events
//WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN |
//WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH |
// Draws over navigation bar
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
//localLayoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
localLayoutParams.height = (int) (50 * getResources().getDisplayMetrics().scaledDensity);
localLayoutParams.format = PixelFormat.TRANSPARENT;
view = new customView(this);
manager.addView(view, localLayoutParams);
setContentView(R.layout.Imges);
}
public class customView extends ViewGroup {
public customView(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("customView", "------Intercepted-------");
return true;
}
}
Using this code i can't overlap navigation,Its shows new custom view in bottom of my activity view but can not overlap navigation bar with custom view.
any one can help me on this, to overlap navigation bar with custom view.?
There are actually some solutions.You cannot overlap in the means of making it totally disappear since there are devices in market without the hardware buttons. However you can elegantly arrange your layout accordingly.
For example,
Add this to your styles.xml (v21 )in a values dir:
<item name="android:windowDrawsSystemBarBackgrounds">false</item>
or if it does not work,
boolean hasMenuKey = ViewConfiguration.get(getContext()).hasPermanentMenuKey();
boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
if(!hasMenuKey && !hasBackKey) {
// Do whatever you need to do, this device has a navigation bar
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.MATCH_PARENT
);
params.setMargins(0, 0, 0, 75);
entrancelayout.setLayoutParams(params);
entrancelayout.requestLayout();
}
I had a FrameLayout, you can use it for whatever layout you have. SetMargins adds margin to buttom in example. It assumes System Bar is there if there are no hardware back and menu buttons.
Is there a way on android to keep the status bar while disabling all interaction you can do with it, like pulling it down?
I want to keep the information this bar gives, but I don't want users to interact with it.
This is the method that I like to use. You can unwrap it from the method and place it inside a base Activity instead. iirc, I got this from StackOverflow as well, but I didn't make a note of it so I'm not sure where the original post is.
What it basically does is place a transparent overlay over the top bar that intercepts all touch events. It's worked fine for me thus far, see how it works for you.
You MAY need to put this line in the AndroidManifest:
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
I have it in my project, but I can't remember if it's because of this or something else. If you get a permission error, add that in.
WindowManager manager;
CustomViewGroup lockView;
public void lock(Activity activity) {
//lock top notification bar
manager = ((WindowManager) activity.getApplicationContext()
.getSystemService(Context.WINDOW_SERVICE));
WindowManager.LayoutParams topBlockParams = new WindowManager.LayoutParams();
topBlockParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
topBlockParams.gravity = Gravity.TOP;
topBlockParams.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;
topBlockParams.width = WindowManager.LayoutParams.MATCH_PARENT;
topBlockParams.height = (int) (50 * activity.getResources()
.getDisplayMetrics().scaledDensity);
topBlockParams.format = PixelFormat.TRANSPARENT;
lockView = new CustomViewGroup(activity);
manager.addView(lockView, topBlockParams);
}
and CustomViewGroup is
private class CustomViewGroup extends ViewGroup {
Context context;
public CustomViewGroup(Context context) {
super(context);
this.context = context;
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
Log.i("StatusBarBlocker", "intercepted by "+ this.toString());
return true;
}
}
Also! You also have to remove this view when your activity ends, because I think it will continue to block the screen even after you kill the application. Always, always ALWAYS call this onPause and onDestroy.
if (lockView!=null) {
if (lockView.isShown()) {
//unlock top
manager.removeView(lockView);
}
}
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 ?