Develop Reference

android accessibility service ACTION_CLICK doesn't work with window overlay

I am trying to click the force stop button using the accessibility service.when i find the FORCE STOP button i click it using:
childNodeView.performAction(AccessibilityNodeInfo.ACTION_CLICK);
this is successful in ordinary scenario, however when I try to hide the process from the user using a window manager overlay the click doesn't work. This makes since maybe because there is a screen over the button I am trying to click, however there are several applications on the play store that have the described functionality with a window overlay
these are my window manager params:
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_PHONE,
WindowManager.LayoutParams.FLAG_FULLSCREEN,
PixelFormat.TRANSLUCENT);
params.gravity = Gravity.TOP | Gravity.START;
oneTapProgressView = new OneTapProgressView(this);
windowManager.addView(oneTapProgressView, params);
Note: I run this from a different service and not from the accessibility service
How do I perform the click with the window overlay?

I believe this is related to the overlay type. Specifically TYPE_PHONE. Phone overlays have special mechanisms to trap events so that users don't accidentally touch buttons with their cheek why talking on the phone.
You should try a different type. For Android O Try:
TYPE_APPLICATION_OVERLAY
For prior operating systems you want:
TYPE_SYSTEM_ALERT
Both of these will require the following permission:
SYSTEM_ALERT_WINDOW
Also, the following flags may be useful if the above alone doesn't fix it:
FLAG_NOT_FOCUSABLE

Lock Screen App for android >= 4.0.3

I'm trying to develop an android app that will replace the stock lock screen and acquire the basic functionality of a typical lock screen. I'm planning to support the app from API level 15 and higher. But I'm facing some problem regarding lock screen behaviour. I'm not yet able to disable the home and recent button of soft navigation bar. I've found lot of examples in stack, github and other sources but those are not so useful.
I've tried in following way:
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
Added following flags in LockActivity
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
| WindowManager.LayoutParams.FLAG_FULLSCREEN
| WindowManager.LayoutParams.FLAG_DIM_BEHIND);
But didn't get any effective solutions. I've found ZUI Locker a very nice app doing what I actually want. How they are accessing the permissions
to work like a default lock screen ?
Any suggestions ?
Thanks in advance!

I've developed a lockscreen app too and I'd like to help you too.
You can check out the answer here for understanding the concept behind Views and TYPE_SYSTEM_ERROR.
But I tweaked the code a bit and here's my version:
WindowManager mWindowManager;
RelativeLayout mLscreenlayout;
WindowManager.LayoutParams localLayoutParams = new WindowManager.LayoutParams( WindowManager.LayoutParams.TYPE_SYSTEM_ERROR,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH|
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN|
View.SYSTEM_UI_FLAG_LAYOUT_STABLE|
View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION|
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN|
View.SYSTEM_UI_FLAG_HIDE_NAVIGATION|
View.SYSTEM_UI_FLAG_FULLSCREEN,
PixelFormat.TRANSLUCENT);
mWindowManager = ((WindowManager)getApplicationContext().getSystemService(WINDOW_SERVICE));
mLscreenlayout = new RelativeLayout(getApplicationContext());
getWindow().setAttributes(localLayoutParams);
View.inflate(this, R.layout.activity_lockscreen, this.mLscreenlayout);
this.mWindowManager.addView(mLscreenlayout, localLayoutParams);
public void onDestroy()
{
mWindowManager.removeView(this.mLscreenlayout);
mLscreenlayout.removeAllViews();
super.onDestroy();
//myThread.interrupt();
Log.i("Daze","Lockscreen Activity Destroyed");
}
Also, there's library on GitHub here to lock the home button. Hope this helps :)

how to avoid system overlay view being closed

My activity creates a system overlay view on the click of a button. I expect this view to remain visible over everything else till i close it on another button click in the activity.
The problem is Android automatically kills that view in a few seconds if i open couple of other applications. I know this is the expected behaviour of Android to manage it's resources. But is there a way to tell Android not to close this view? I tried creating the overlay in an IntentService, but it made no difference.
View creation code :
mFrameLayout = new FrameLayout(mContext);
mFrameLayout.setBackgroundColor(mContext.getResources().getColor(R.color.black));
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
PixelFormat.TRANSLUCENT
);
WindowManager windowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
windowManager.addView(mFrameLayout, params);

Use service to create your system overlay view.
Not IntentService, just extend Service.
Make it work even if app goes to backgroung by returning "START_STICKY"

Android Create GestureOverlay as a System Alert View (on top of all apps)

I want to create a gestureoverlay for an app. I want the gesutureoverlay to be ontop of all other views. I have done this with a textbox and a button so far. I have the below code which creates the overlay on top of all apps but I can not use anything else in any others app or home screen. The app takes away from being able to focus in on the background view. I do however get my gesture overlay to work.
How do I at the very least get the phone to work normally but get to see the swipes the user makes (create a gesture overlay) on top of all apps?
This is what I have so far
#Override
public void onCreate() {
super.onCreate();
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM |
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSLUCENT);
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
GestureOverlayView g = new GestureOverlayView(getBaseContext());
g.setGestureVisible(true);
g.setEventsInterceptionEnabled(true);
wm.addView(g, params);
}

First of all, thanks because your code helped me to get my GestureOverlayView working on top.
I am working on something similar also and as far as I know you cant do this, at least just like that. To do that you need to have INJECT_PERSMISSION and this permission is grant only to system signed app, therefore you can´t do it using Android APIs if you dont have your ROM sign.
Of course there are other ways to do that.
What you might do is to get events in your activity and "re-insert" them from your activity to the activity under you. And this is something you cant do through android.
Take a look here and here.
In these links you can find further information about how to inject event into Android system.

How can I interact with the Lockscreen layout to display text into it, like this app:

I just discovered this application : https://market.android.com/details?id=de.j4velin.lockscreenCalendar
It seem that is now possible to write some text inside the lockscreen in the place where the alarm is usually written.
I would like to display custom text on this place, but have totally no idea on how to achieve that.
This guy succeed to write calendar events at this place.
Thank a lot for any clue//snippet that would help me.

This is astonishingly easy to achieve and astonishingly badly documented. All you need to do is set the alarm string in the system settings, as follows:
String message = "This is a test";
Settings.System.putString(context.getContentResolver(),
Settings.System.NEXT_ALARM_FORMATTED, message);

It is not the exact thing you asked for,but the code for custom lockscreen can be found here.It might help you.
http://code.google.com/p/contactowner/

I've never come accross any legit way within the public android APIs to affect the lock screen. Without playing with that app at all I wouldn't know for sure, but my guess is he created that activity that allows him to show whatever text he wants. Then uses a receiver to listen for SCREEN_OFF, or SCREEN_ON events and starts his "lock" activity at that time.
It is worth noting: If you choose to do something like this to achieve the affect you're after, it is not going to behave the exact same as the lock screen. The differences may be fairly slight, and could end up being fine for your purposes but be aware that they are there. Also assuming you go this route it wouldn't work if the user has a "pattern" lock as the KeyguardManager is unable to disable that screen programmatically

you also need to add
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
in androidmanifest.xml

The voted answer will work only if no one else is using the same to display their message. If two receivers are registered for SCREEN_ON/OFF intent action, the latest receiver's message will be displayed.

With marc1s' solution there are 2 problems,
1. it doesn't look good & you can't change its look&fill e.g. text font or color etc
2. any other application can replace it
So its better if you show a view using window manager from a service. So you can show
whatever view you want to show.
e.g. my code below in onStartCommand of my Service
WindowManager mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
View mView = mInflater.inflate(R.layout.score, null);
WindowManager.LayoutParams mLayoutParams = new WindowManager.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT, 0, 0,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
| WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
/* | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON */,
PixelFormat.RGBA_8888);
mWindowManager.addView(mView, mLayoutParams);