Is Possible Remove An Overlay With Windowmanager When Press Back Or Home Button In Android?

I'm trying to find some answer to my question in the site but I don't found anything, and I'm not sure if is possible remove or hide the overlay with windowManager when press back

Solution 1:

Simply you need to set the windowmanager type to APPLICATION, this way the windowmanager will attach views while the application is opened only, and no need to overlay home or back buttons, check docs here

WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                    WindowManager.LayoutParams.MATCH_PARENT,
                    WindowManager.LayoutParams.MATCH_PARENT,
                    WindowManager.LayoutParams.TYPE_APPLICATION,
                    0,
                    PixelFormat.TRANSLUCENT);

Solution 2:

Removing the view is easy. I noticed you have set it to invisible, this is an acceptable solution. You can also keep a reference to it around and do the following:

windowManager.removeView(mYourView);

The problem is going to be detecting the back button press. You cannot do this reliably. You're relying on a hardware expectation, namely that the back button press sends a key event with KEYCODE_BACK, and the OS does not make this guarantee. However, on my Droid turbo the following works:

First you need a separate xml file to configure your accessibility service.

contents of service_config.xml:

<?xml version="1.0" encoding="utf-8"?><accessibility-servicexmlns:android="http://schemas.android.com/apk/res/android"...android:canRequestFilterKeyEvents="true"android:accessibilityFlags="flagDefault|flagRequestFilterKeyEvents"...
    />

Contents of AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?><manifestxmlns:android="http://schemas.android.com/apk/res/android"...><application...><service...><meta-dataandroid:name="android.accessibilityservice"android:resource="@xml/service_config" /></service></application></manifest>