Custom view height is cut on Android 24

[egandro]

Hey,

I have an issue on a Nvidia Shield K1 (Android 7.0). The height of a custom view is cut, when the anchor point is on the very top or very bottom of the screen.

On my phones / 10" tablet I don't have this problem.

[egandro]

I debugged this:

mPopupWindow.showAtLocation(mRootView, Gravity.NO_GRAVITY, mRootView.getWidth(), mRootView.getHeight());

The mRootView of my button is the Toplevel Window.

It is called with height = 1920, width = 1200

Which isn't the center position of the button?

[egandro]

I personally think we need something like this:

    int pos[] = new int[2];
    view.getLocationOnScreen(pos); // or this getLocationInWindow()
    popupWindow.showAtLocation(view.getRootView(), Gravity.NO_GRAVITY, pos[0], pos[1]);

[douglasjunior]

The initial position set to showAtLocation is fake, because the final position is calculated later with the arrow position. See this line.

Can you send a picture or screenshot of this problem?

[egandro]

Thx for pointing me to the calculation function. I'll try hunting the bug ;)

It's somehow strange only on the Nvidia Shield K1 (7" / 2015 / 7.0) there is this problem.

I'll send you a merge request or a sample project if I can't find the issue.

Thx!

[douglasjunior]

@egandro I think I found the problem, but not the solution yet.

On Android 24, apparently, PopupWindow changed behavior when it did not fit the screen. In previous versions the PopupWindow position was adjusted automatically, without changing the size.

See on Android 23 (position adjusted):

But, on Android 24 the size is adjusted automatically:

I will work to find a solution, but suggestions are welcome 😄

[egandro]

Hey!

I got a hint from a friend.

It might be this flag:

https://developer.android.com/reference/android/widget/PopupWindow.html#attr_android:overlapAnchor

Can you give it a try?

Thx.

[douglasjunior]

In my tests overlapAnchor did not work. But I found the source for this behavior, it's the property setClippingEnabled.

Setting setClippingEnabled(false) allows PopupWindow to override the screen boundary. See a example:

But if the PopupWindow stays outside the screen, it can be hidden.

Researching a little, I saw that the behavior of PopupWindow was changed on Android 24 and 25, but I'm not sure that this will change in the future.

• https://stackoverflow.com/questions/39673099/android-nougat-popupwindow-showasdropdown-gravity-not-working
• https://stackoverflow.com/questions/41973893/android-nougat-7-1-1-showatlocation-gravity-not-working

I've created a test branch (632b028), if you'd like to check it out.

dependencies {
    // ...
    compile ('com.github.douglasjunior:android-simple-tooltip:issue-40-SNAPSHOT') {
        changing = true // Gradle will then check for updates every 24 hours
    }
}

[egandro]

Thx man! I'll give it a try. In a view minutes.

[egandro]

Have a look. It still hast the issue on the K1 :(

[douglasjunior]

Yes, the only solution I think is calculating the position manually.

[egandro]

I have an idea ;)

You can take the calculation algorithm from <24 and put it in your code.

Check the license if this is ok. But that would fix it 100%