Exclude certain elements from being animated in android layout transitions - android

I have a question regarding the android layout transition framework. In particular i want to achieve an effect that a certain part of an layout slides down or up depending on the visibility of another view(s).
Imagine the following layout. (And please overlook the nested LinearLayouts here ;) )
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:id="#+id/changingView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone"/>
<View
android:id="#+id/changingView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone"/>
</LinearLayout>
<LinearLayout
android:id="#+id/movingView"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="false"/>
</LinearLayout>
Now what i want to achieve is that when changingView1 and changingView2 change their visibility that movingView slides up or down.
By enabling the LayoutTransition.CHANGING for the parent layout the sliding part works fine so. But this has the side effect that the movingView will also be animated when there are being items added or removed because this layout changes its bounds. And here lies my problem because this results in a very strange looking animation.
So back to my question. Is there a way to keep the sliding animation without animating layout bound changes on the movingView?
Disabling layoutTransitions on the movingView obviously does not help because this only effects the animations of the child views. I also tried playing around with enabling and disabling different LayoutTransitions on the parent layout but so far without the desired effect.
If i can add more details please let me know otherwise i hope someone can help me out.
Thanks in advance!


I know it's late but hope it can help someone. Since android:animateLayoutChanges is the property of the direct parent, you can wrap your View/Layout in a FrameLayout (or some other ViewGroup) and set android:animateLayoutChanges="false" on the new parent.


To avoid unwanted animations you can remove the animate layout changes by code when needed, something like this:
//removing the animate layout changes to prevent the default animation for the newly added items
parentLayout.setLayoutTransition(null);
/* do some logic to add the new views */
//add the animate layout changes back so the over changes will be still animated
new Handler().post(() -> {parentLayout.setLayoutTransition(new LayoutTransition());});

Related

Does 'android:animateLayoutChanges="true" ' Still work

I saw that this statement used inside an xml layout will automate animations for you. I want to add this to my app, but when I put it in the layout I want
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/arrow_background"
android:layout_marginTop="7dp"
android:layout_marginBottom="7dp"
android:padding="10dp"
android:animateLayoutChanges="true"
android:visibility="visible"
android:id="#+id/format_help">
And then I change the visibility to gone
view.findViewById(R.id.format_help).setVisibility(View.GONE);
It only just instantly goes away. The information I saw about this was from a few years ago so does anyone know if this is still supposed to work or how to get it to work?
EDIT: Also I added this statement everywhere and it still does not working. If it matters this is inside a fragment/dialog

It works for views inside container which has the property android:animateLayoutChanges="true". If a Linear layout having the above property, whenever a new view added or removed from that container the effect is visible. The animation effect will not be visible to the container itself when container is added or removed. For more information check the below link.usage of animateLayoutChanges

Android fixed background image in scrollview while scrolling

I have a situation where I need a scrollview to have a background image that shouldn't scroll along with it's parent when moving. Before any of you suggest me the links for setting background image and this that, I have already tried and it's not working.
The whole story goes like: I have an activity with fragments which have their own backgrounds with some input fields. When focusing over input fields, keyboard appears and background image squeezes. For that I put an image on background of scrollview that fixed my issue of squeezing background but raised another concern that background Image should stay static while scrolling the parent scrollview.
The second solution any of you may suggest is setting background of my activity rather playing with scrollview. That's right, but for that I had to make a style element with background of theme which appears odd while transitioning different fragments plus it adds overhead when I have a lot of code and fragments to move forward and back.
That's the point where I am stuck. I have gone through links below, if you just need to know that I tried it or not.
link1
link2
link3
... and so on
below is the layout I am using for my fragments (it's all being done programmatically)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/top_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:scrollbars="none" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/backgroundView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="#string/app_name"
android:scaleType="fitXY" />
<LinearLayout
android:id="#+id/parent_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
</LinearLayout>
</FrameLayout>
</ScrollView>
</LinearLayout>
So if you guys have any better solution keeping in mind the situation I have, will be warmly welcomed. Thank you

None of the above works for me with some reason but this things works.
getWindow().setBackgroundDrawableResource(R.mipmap.img_reg_bg);
put it in oncreate method hope it will help.

If I guess right you try to fix your hotfix to get it working propperly. If I'm right you sould go back to scratch and do it without your scrollview.
If you have a look at following Link:
http://developer.android.com/guide/topics/manifest/activity-element.html#wsoft
you'll see softkeyboard mode can be adjusted. "adjustPan" should solve your problem.
"adjustPan"
The activity's main window is not resized to make room for the soft keyboard. Rather, the contents of the window are automatically panned so that the current focus is never obscured by the keyboard and users can always see what they are typing. This is generally less desirable than resizing, because the user may need to close the soft keyboard to get at and interact with obscured parts of the window.

Add someimgage to your drawable folderes, like drawable-mdpi, drawable-hdpi.
In your LinearLayout "#+id/top_layout" add attribute:
android:background="#drawable/someimage"

Visibility of Gone takes still space of particular control in android?

I am using the LinearLayout and inside there's button I am making visibilty gone based on supported states. SupportedStatuses are true then making Button as Visible but SupprtedStatuse are false then making button as Gone.
This is in a header and Button is Gone but still takes up the space.
Here is the Layout which I am using.
<LinearLayout
android:id="#+id/llparentView"
android:layout_width="match_parent"
android:layout_height="wrap_content
android:orientation="vertical">
<Button
android:id="#+id/btn_change_status"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
Anybody have a good solution then it helps me a lot.

You could use a FrameLayout around whatever layout you are using
For example:
<FrameLayout android:layout_width="match_parent" android:layout_height="wrap_content">
<!-- put your views here -->
</FrameLayout>
This will ensure when using View.GONE the FrameLayout collapses on the space.

Try to wrap your button in another Linear/Frame layout and change their visibility as well.

How to disable any event on a View in Android?

My question is simple: How to disable any event on a View in Android? (including removing its focussability, like I just want it to be there visually but be inexistant on everything else)
And does it work on a whole view tree? (like if I disable events on the root, all the events will be disabled for its children?).
Now, before you say anything I have tried all the following:
setEnabled
setFocusable
setSelected
setClickable
setActivated
And none of these methods appear to work, seriously.
I have tried them directly on a WebView, as well as on the parent layout on everything but I am still able to interact with it.
Any idea?
Thanks!
EDIT#1
The solution that consists in adding a view on top of the view that needs to be disabled doesn't work. Actually, it's still possible to click on the inner view, I have tried with a simple example:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#ff0000">
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Click Me!"
/>
</LinearLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00000000"
/>
</FrameLayout>
Here it's still possible to click on the button.
EDIT#2
The reason why I want to do this is related to the following question that I asked weeks ago.
What I have is a ListViewacting as a navigation bar which is underneath a View that holds the content of my app. The problem with this implementation is that when I try to scroll through the ListView when there is a focusable view in the layer on top of it, well the ListView doesn't scroll and instead it's the top view that takes focus (That's the case when there is a
Webview or an EditText etc.).
So yes as mentioned in one of the answers, I can disable any click events on a WebView by overriding setOnTouchListener but the view remains focussed and I think this is the reason why I am still having the same issue with my navigation bar.

Simply put a view on top of your view. You can toggle it on off by setting view.visibility = gone/visible.
<FrameLayout>
<WebView/>
<FrameLayout This view will be on top/>
</FrameLayout>
Edit: Just stumpled upon this link: https://stackoverflow.com/a/3856199/969325
Basically disables all touch event for the webview. Tryed that?
Edit 2 reedit: Try to set the visibility to gone for the the top view below your listview.

How to bring view in front of everything?

I have activity and a lot of widgets on it, some of them have animations and because of the animations some of the widgets are moving (translating) one over another. For example the text view is moving over some buttons . . .
Now the thing is I want the buttons to be always on the front. And when the textview is moving I want to move behind the buttons.
I can not achieve this I tried everything I know, and "bringToFront()" definitelly doesn't work.
note I do not want to control the z-order by the order of placing element to layout cause I simply can't :), the layout is complex and I can not place all the buttons at the begging of the layout

You can call bringToFront() on the view you want to get in the front
This is an example:
yourView.bringToFront();

With this code in xml
android:translationZ="90dp"

I've been looking through stack overflow to find a good answer and when i couldn't find one i went looking through the docs.
no one seems to have stumbled on this simple answer yet:
ViewCompat.setTranslationZ(view, translationZ);
default translation z is 0.0

An even simpler solution is to edit the XML of the activity. Use
android:translationZ=""

bringToFront() is the right way, but, NOTE that you must call bringToFront() and invalidate() method on highest-level view (under your root view), for e.g.:
Your view's hierarchy is:
-RelativeLayout
|--LinearLayout1
|------Button1
|------Button2
|------Button3
|--ImageView
|--LinearLayout2
|------Button4
|------Button5
|------Button6
So, when you animate back your buttons (1->6), your buttons will under (below) the ImageView. To bring it over (above) the ImageView you must call bringToFront() and invalidate() method on your LinearLayouts. Then it will work :)
**NOTE: Remember to set android:clipChildren="false" for your root layout or animate-view's gradparent_layout. Let's take a look at my real code:
.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:hw="http://schemas.android.com/apk/res-auto"
android:id="#+id/layout_parent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/common_theme_color"
android:orientation="vertical" >
<com.binh.helloworld.customviews.HWActionBar
android:id="#+id/action_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/dimen_actionbar_height"
android:layout_alignParentTop="true"
hw:titleText="#string/app_name" >
</com.binh.helloworld.customviews.HWActionBar>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/action_bar"
android:clipChildren="false" >
<LinearLayout
android:id="#+id/layout_top"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:gravity="center_horizontal"
android:orientation="horizontal" >
</LinearLayout>
<ImageView
android:id="#+id/imgv_main"
android:layout_width="#dimen/common_imgv_height"
android:layout_height="#dimen/common_imgv_height"
android:layout_centerInParent="true"
android:contentDescription="#string/app_name"
android:src="#drawable/ic_launcher" />
<LinearLayout
android:id="#+id/layout_bottom"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:gravity="center_horizontal"
android:orientation="horizontal" >
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
Some code in .java
private LinearLayout layoutTop, layoutBottom;
...
layoutTop = (LinearLayout) rootView.findViewById(R.id.layout_top);
layoutBottom = (LinearLayout) rootView.findViewById(R.id.layout_bottom);
...
//when animate back
//dragedView is my layoutTop's child view (i added programmatically) (like buttons in above example)
dragedView.setVisibility(View.GONE);
layoutTop.bringToFront();
layoutTop.invalidate();
dragedView.startAnimation(animation); // TranslateAnimation
dragedView.setVisibility(View.VISIBLE);
GLuck!

Try FrameLayout, it gives you the possibility to put views one above another. You can create two LinearLayouts: one with the background views, and one with foreground views, and combine them using the FrameLayout. Hope this helps.

If you are using ConstraintLayout, just put the element after the other elements to make it on front than the others

i have faced the same problem.
the following solution have worked for me.
FrameLayout glFrame=(FrameLayout) findViewById(R.id.animatedView);
glFrame.addView(yourView);
glFrame.bringToFront();
glFrame.invalidate();
2nd solution is by using xml adding this attribute to the view xml
android:translationZ=""

You can try to use the bringChildToFront, you can check if this documentation is helpful in the Android Developers page.

There can be another way which saves the day. Just init a new Dialog with desired layout and just show it. I need it for showing a loadingView over a DialogFragment and this was the only way I succeed.
Dialog topDialog = new Dialog(this, android.R.style.Theme_Translucent_NoTitleBar);
topDialog.setContentView(R.layout.dialog_top);
topDialog.show();
bringToFront() might not work in some cases like mine. But content of dialog_top layout must override anything on the ui layer. But anyway, this is an ugly workaround.

You can use BindingAdapter like this:
#BindingAdapter("bringToFront")
public static void bringToFront(View view, Boolean flag) {
if (flag) {
view.bringToFront();
}
}
<ImageView
...
app:bringToFront="#{true}"/>

The order of the overlapping views really depends of 4 things:
The attribute android:elevation which is measured in dp/sp
The attribute android:translationZ which is also measured in dp/sp.
In Constraint Layout, the order in which you put the views in your Component Tree is also the order to be shown.
The programmatically order that you set through methods like view.bringToFront() in your kotlin/java code.
The numerals 1 and 2 compite with each other and take preference over the points 3 and 4: if you set elevation="4dp" for View 1 and translationZ="2dp" for View 2, View 1 will always be on top regardless of the numerals 3 and 4.

Thanks to Stack user over this explanation, I've got this working even on Android 4.1.1
((View)myView.getParent()).requestLayout();
myView.bringToFront();
On my dynamic use, for example, I did
public void onMyClick(View v)
{
((View)v.getParent()).requestLayout();
v.bringToFront();
}
And Bamm !

You can use elevation attribute if your minimum api level is 21. And you can reorder view to the bottom of other views to bring it to front. But if elevation of other views is higher, they will be on top of your view.

If you are using a LinearLayout you should call myView.bringToFront() and after you should call parentView.requestLayout() and parentView.invalidate() to force the parent to redraw with the new child order.

Arrange them in the order you wants to show. Suppose, you wanna show view 1 on top of view 2. Then write view 2 code then write view 1 code. If you cant does this ordering, then call bringToFront() to the root view of the layout you wants to bring in front.

Try to use app:srcCompat instead of android:src

You need to use framelayout. And the better way to do this is to make the view invisible when thay are not require. Also you need to set the position for each and every view,So that they will move according to there corresponding position

You can set visibility to false of other views.
view1.setVisibility(View.GONE);
view2.setVisibility(View.GONE);
...
or
view1.setVisibility(View.INVISIBLE);
view2.setVisibility(View.INVISIBLE);
...
and set
viewN.setVisibility(View.VISIBLE);

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