Develop Reference

Wrapping text on a TextView that's constrained both on the left and on the right in a ConstraintLayout

In a ConstraintLayout, I have 2 TextView's side-by-side, and I want the right one to wrap text when it becomes too long so that it stays on the right of the left TextView, and doesn't overflow the container. Here is the code I have now:
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10sp">
...
<TextView
android:id="#+id/buildingTypeLabel"
style="#style/FormLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="5sp"
android:paddingBottom="5sp"
android:text="#string/reference_view_building_type"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#id/dateLabel"
tools:text="Type de bâtiment" />
<TextView
android:id="#+id/buildingType"
style="#style/FormValue"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:layout_marginStart="5dp"
android:layout_weight="1"
android:ellipsize="none"
android:maxLines="100"
android:scrollHorizontally="false"
app:layout_constraintBaseline_toBaselineOf="#id/buildingTypeLabel"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toEndOf="#+id/buildingTypeLabel"
app:layout_constraintTop_toBottomOf="#id/date"
tools:text="Bâtiments gouvernementaux" />
...
</androidx.constraintlayout.widget.ConstraintLayout>
But instead of putting text text on 2 lines in the right TextView, it overflows on the right:
Note that I have tried to add app:layout_constrainedWidth="true" to the right TextView, but it doesn't change anything.
How can I strictly enforce the right and left contraints of that TextView and have it wrap text to have a smaller width when needed?

Try to change to layout_constraintEnd_toEndOf instead layout_constraintRight_toRightOf :)

Use ellipsize= "end" for the textview on the right that is extending text outside of the device screen.

Use Guidelines
Guidelines are part of the constraint layout api.
Documentation are here ->
https://developer.android.com/reference/androidx/constraintlayout/widget/Guideline
This is how you can define your guideline in xml.
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline_start"
android:layout_width="0dp"
android:layout_height="0dp"
android:orientation="vertical"
app:layout_constraintGuide_begin="?dialogPreferredPadding" />
Guidlines can act as a differentiating factor between the two text views that you want to segregate .
Refer to this stackoverflow answer for much better understanding
What is difference between Barrier and Guideline in Constraint Layout?
The above link will also introduce you to barriers which is also part of constraint layout api which can also help you solve the above issue.

Below you can find the solution:
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10sp">
<TextView
android:id="#+id/buildingTypeLabel"
style="#style/FormLabel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:paddingTop="5sp"
android:paddingBottom="5sp"
android:text="#string/reference_view_building_type"
app:layout_constraintEnd_toStartOf="#id/buildingType"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/dateLabel"
tools:text="Type de bâtiment" />
<TextView
android:id="#+id/buildingType"
style="#style/FormValue"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:maxLines="100"
app:layout_constraintBaseline_toBaselineOf="#id/buildingTypeLabel"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/buildingTypeLabel"
app:layout_constraintTop_toBottomOf="#id/date"
tools:text="Bâtiments gouvernementaux\n\nlef,le,flelf,le,fle," />
</androidx.constraintlayout.widget.ConstraintLayout>

Make alignments with different views so that they are center aligned with each other

Android Studio 3.5.3
I have the following xml and using constraintLayout to align a 2 views and TextView with each other. However, The views need to be fixed at a MarginTop of 45dp. I need to adjust the MarginTop of the textview to get them to look like they are horizontally aligned. I think there must be a better way. So basically, the Views need to be MarginTop of 45dp and the TextView should look like its aligned horizontally without having to adjust the MarginTop to try and compensate.
<View
android:id="#+id/lineRight"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginTop="45dp"
android:layout_marginEnd="16dp"
app:layout_constraintEnd_toStartOf="#+id/tvOr"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/bt_login"
android:background="#android:color/darker_gray"/>
<TextView
android:id="#+id/tvOr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="34dp"
android:fontFamily="#font/roboto_regular"
android:text="OR"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/bt_login" />
<View
android:id="#+id/lineLeft"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginTop="45dp"
android:layout_marginStart="16dp"
app:layout_constraintStart_toEndOf="#+id/tvOr"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/bt_login"
android:background="#android:color/darker_gray"/>
And this is an image of what I am trying to achieve:

You can vertically constrain the tvOr to one of the views, let's say the left one, and remove the marginTop like this:
<TextView
android:id="#+id/tvOr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/roboto_regular"
android:text="OR"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#id/lineLeft"
app:layout_constraintBottom_toBottomOf="#id/lineLeft"/>
This way the TextView will be centered vertically with the left line.

TextView going out of screen with constraintLayout

I am using ConstraintLayout to create below xml in my application.
As you can see my first item is fine, But in the second one, some parts of my textView are not on the screen!
This is my XML code:
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/ly_user"
android:padding="8dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
app:layout_constraintRight_toRightOf="parent"
android:id="#+id/im_user_icon"
android:layout_width="#dimen/default_message_icon_size"
android:layout_height="#dimen/default_message_icon_size"
android:src="#drawable/user_pacific"/>
<ImageView
app:layout_constraintTop_toBottomOf="#+id/im_user_icon"
app:layout_constraintRight_toLeftOf="#+id/im_user_icon"
android:id="#+id/im_user_arrow"
android:layout_width="30dp"
android:layout_height="30dp"
android:src="#drawable/arrow_bg1"/>
<View
android:id="#+id/view_user_guidLine"
android:layout_width="1dp"
android:layout_height="0dp"
app:layout_constraintLeft_toLeftOf="#id/im_user_arrow"
app:layout_constraintRight_toRightOf="#id/im_user_arrow"/>
<TextView
app:layout_constraintTop_toBottomOf="#+id/im_user_icon"
app:layout_constraintRight_toLeftOf="#+id/view_user_guidLine"
android:id="#+id/tv_user_message"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="right"
android:padding="8dp"
android:minWidth="#dimen/default_message_textarea_width"
android:minHeight="#dimen/default_message_textarea_height"
android:background="#drawable/bg_right_text"
android:textColor="#android:color/white"/>
</android.support.constraint.ConstraintLayout>
I Know I can fix this problem to adding below line to the textView, But I need my textView be wrapContent.
app:layout_constraintLeft_toLeftOf="parent"

You can set your TextView's width to wrap_content, but to prevent it from expanding outside of screen you need to add the left constraint as well and use app:layout_constrainedWidth="true" to enforce constraints.
Now, to make the TextView stick to the right, you need to add app:layout_constraintHorizontal_bias="1", which will align it to its right constraint.
So all in all, these are the changes needed for the TextView:
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constrainedWidth="true"
app:layout_constraintHorizontal_bias="1"
android:layout_width="wrap_content"

Add these following line in your code in your TextView
app:layout_constraintWidth_percent="0.6"
first line layout_constraintWidth_percent is 60 percent of your phone screen width you can change it according to your need.

Accepted answered works but on my side I use android:layout_width="0dp" because my TextView is in the middle of two elements.
<TextView
android:id="#+id/my_id_text_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="#string/long_text"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/second_vertical_divider_view"
app:layout_constraintStart_toEndOf="#+id/first_vertical_divider_view"
app:layout_constraintTop_toTopOf="parent" />

Accepted answer didn't helped in my case. Alternative solution can look like that:
<ConstraintLayout>
<TextView
android:id="#+id/title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="2"
app:layout_constraintEnd_toStartOf="#+id/option_info"
app:layout_constraintHorizontal_chainStyle="packed"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_max="wrap" />
<ImageView
android:id="#+id/option_info"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_info"
app:layout_constraintBottom_toBottomOf="#+id/title"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/title"
app:layout_constraintTop_toTopOf="#+id/title" />
</ConstraintLayout>
The idea is to prevent one view pushing another while expanding by creating a chain and add some constraint params to hold influenced view in view's border.
Hope it still will help somebody!

Wrap right-aligned view when there is no space

I have 2 views in a layout - TextView and Button. TextView is aligned/anchored to the left side and the button is to the right side.
What I'm trying to achieve is the natural "wrap behavior" of the Button. When TextView will be wide enough so that there won't be space for the button (in the same line), it should move below the TextView, while still anchored to the right.
Here are 3 scenarios for the layout which I want to achieve:
I was trying to make this with FlexBoxLayout, but the button appears on the left side after wrapping.
<com.google.android.flexbox.FlexboxLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:flexDirection="row"
app:flexWrap="wrap"
app:justifyContent="space_between"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="text text"
android:gravity="start"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="end"
android:text="Button"
/>
</com.google.android.flexbox.FlexboxLayout>
So how can I do that? It doesn't need to be FlexBox, I can use any layout, even 3rd party.

Use justifyContent="flex_end" in the parent and set layout_flexGrow to the children like this works for me.
<com.google.android.flexbox.FlexboxLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="300dp"
android:layout_height="wrap_content"
app:flexDirection="row"
app:flexWrap="wrap"
app:justifyContent="flex_end">
<TextView
android:id="#+id/textview2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="blah blah"
app:layout_flexGrow="1" />
<TextView
android:id="#+id/textview3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="( . )( . )"
app:layout_flexGrow="0" />
</com.google.android.flexbox.FlexboxLayout>

No need for a 3rd party layout.
ConstraintLayout should be more than enough - with a small tweak in code.
Your TextView will have straightforward constraints, set to parent layout (start, top, end).
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools">
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="48dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="Text text text text text text" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="#+id/text" />
</android.support.constraint.ConstraintLayout>
In the code, just check the width of the TextView and compare it with the width of the parent (basically check it should overlap with the button).
If it does change(you will have to do this in code but this is the principle):
app:layout_constraintTop_toTopOf="#+id/text"
to
app:layout_constraintTop_toBottomOf="#+id/text"
If you need to do this dynamically ConstraintLayout has neat feature "Keyframe animations" that creates awesome looking animations when you are changing constraints.

Doesn't seem like there is a way to do it with Flexbox. I would just do it programmatically when you've inflated the resource (in onCreateView() or something like that). The parent of both of the views would be a RelativeLayout, with the Button aligned to the TextView top when the widths combined don't exceed the width of the RelativeLayout, and aligned to the bottom of the TextView when the widths are larger than that.

Centering textview with right aligned button

I have an arbitrary length textview+icon (icon+text) that needs centering on the screen. On the same row, there is a button aligned to the right side of the screen. (X)
| icon+text | X |
Using a LinearLayout I can center it with the view, but the button on the right shifts it left.
With a relative layout, I can achieve what I want but if the text is too long the button overlaps the text.
What's the right way to do this? I haven't used constraintLayout before, would that solve it?

I suggest you to use a constraint layout,
Example:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".YourActivity">
<TextView
android:id="#+id/my_text_view"
android:text="My Long Text That must not overlap the button"
android:layout_width="0dp"
android:gravity="center"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#+id/my_btn"
app:layout_constraintTop_toTopOf="#+id/my_btn"
app:layout_constraintBottom_toBottomOf="#+id/my_btn"/>
<Button
android:id="#+id/my_btn"
android:layout_marginTop="16dp"
android:text="My Nice Button "
android:layout_marginEnd="8dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toEndOf="#id/my_text_view"
app:layout_constraintEnd_toEndOf="parent"/>
</android.support.constraint.ConstraintLayout>
Example Output:

You can set it like this,
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.2"
android:drawableLeft="#mipmap/ic_launcher"
android:text="Click" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.8"
android:gravity="center"
android:text="TextView" />
</LinearLayout>

just use a Relative Layout.
Center your Textview
and put toRightOf=txtViewsName on the button.
//UPDATED Forcing Widths in DP to ensure text is always centered and never overlaps button.
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableLeft="#mipmap/ic_launcher"
android:maxWidth="230dp"
android:layout_centerHorizontal="true"
android:ellipsize="end"
android:text="My text to show test abcdefghyijkldkf here" />
<Button
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="Button" />
</RelativeLayout>
You will need to adjust the button width and textview maxwidth to match your design, and confirm on preview all resolutions, but dp should cover you pretty well in this case.
NOTE*
This simply answers your issue, but does not do any funny behavior, i.e. if text grows too much ignore center command and start moving to the left, this does not do that. If that is your desire, please update your question.
//Centering Text in left view and using weight to ensure text area takes proper percentage of the space (based on your comments, not the layout you are looking for, but I'll leave it in case it helps someone else).
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="10">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="7"
android:drawableLeft="#mipmap/ic_launcher"
android:gravity="center"
android:text="My text to show here" />
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="3"
android:text="Button" />
</LinearLayout>

for best practice i think ConstraintLayout is the best solution for designing and yes of course it helps you for what are you looking for.
for more info check this Build a Responsive UI with ConstraintLayout and this
ConstraintLayout.

Since your ImageButton on right has a fixed width (let's say 40dp for the purpose of this example) you can achieve the desired result by adding a margin of the same width at the end of your TextView to ensure that they're not overlapping. To keep the TextView centered on the screen you have to add the same margin at the start as well:
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/textview"
android:text="TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="40dp"
android:layout_marginEnd="40dp"
app:layout_constrainedWidth="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="#+id/button"
android:layout_width="40dp"
android:layout_height="40dp"
app:layout_constrainedWidth="true"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintVertical_bias="0.0"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#id/textview"
app:layout_constraintTop_toTopOf="parent"/>
</android.support.constraint.ConstraintLayout>
If you want to center the text within the TextView use android:gravity="center":
If the ImageButton's width was wrap_content then this approach wouldn't work, because there is no way to constraint the end of the TextView both to the end of the parent (so it's centered on the screen) and to the start of the ImageButton (so they don't overlap if the text gets long) at the same time.

In the end I ended up using RelativeLayout per Sam's suggestion with maxWidth and margin set on the TextView.