I am writing a component for Unity3D. I am asking this question here
because I think it is more of an Android question than a Unity3D question.
Unity3D allows developers to write what are called Plugins. Unity has its
own Activity that the app runs in. A plugin can interact with that activity.
The Unity activity has a ViewGroup and View in it with a canvas.
I want to add a new View into the ViewGroup of Unity. I want this new view
to be centered on the screen and not cover up any of the existing canvas
except for where it lives in the middle of the screen. I figure it will
take about the full width and about 1/4 of the center of the screen.
The question is how to do this. Currently I am using a Fragment because the
view I am trying to insert must be used as a Fragment. This Fragment shows
up and works just fine. I can see the UI. The problem is it completely
covers the Unity activity window.
There are a couple things to note about the code below. Thanks to other
developers for the code to find the Unity View. I have to set the Id of the
leaf view because it is -1 if I don't. Maybe that is part of the problem.
Maybe I am getting the wrong view? My Fragment does show up, so....
I think I will need to use some kind of Layout and set the settings on it.
If that is the way, please point me to the way to do that.
Again, I want my Fragment view to float on top of the Unity view and be
centered on the screen taking of the full width, but not height.
Here is the code I have so far that shows the fragment, but covers the
whole screen:
private View getLeafView(View view) {
if (view instanceof ViewGroup) {
ViewGroup vg = (ViewGroup)view;
for (int i = 0; i < vg.getChildCount(); ++i) {
View chview = vg.getChildAt(i);
View result = getLeafView(chview);
if (result != null)
return result;
}
return null;
}
else {
return view;
}
}
public void Init(String videoId, String objectName, int heightOffset) {
UnityPlayer.currentActivity.runOnUiThread(new Runnable() {
public void run() {
ViewGroup rootView =
(ViewGroup)UnityPlayer.currentActivity.findViewById(android.R.id.content);
// find the first leaf view (i.e. a view without children)
// the leaf view represents the topmost view in the view stack
View topMostView = getLeafView(rootView);
if (topMostView != null) {
// let's add a sibling to the leaf view
ViewGroup leafParent = (ViewGroup)topMostView.getParent();
if (leafParent != null) {
leafParent.setId(0x20348);
MyFragment fragment = new MyFragment();
FragmentManager fragmentManager =
UnityPlayer.currentActivity.getFragmentManager();
FragmentTransaction fragmentTransaction =
fragmentManager.beginTransaction();
fragmentTransaction.add(leafParent.getId(), fragment);
fragmentTransaction.commit();
}
}
}
});
}
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