Develop Reference

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!

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.

goneMargin is not respected in a wrap_content ConstraintLayout?

I have a ConstraintLayout where its height is wrap_content.
I want its height to be able to collapse or expanding, according to its Child's height. Simple and common enough, right?
Now I have a layout which looks like this:
(First of all, please ignore the abnormal super large margin at the bottom. As you can see, the margin is just 16dp but the preview renders a very large margin.)
My problem is, if the big rectangle's visibility is set to gone,
According to the documentation of ConstraintLayout, if I set its goneMarginTop to a certainValue, it will retain that margin even when its visibility is gone. So that my Request Date will have some space to the bottom of parent.
However, this does not work as expected. Request Date sticked to the bottom of its parent:
(This is again a broken preview. In my real app, I am able to see a complete Request Date)
Have I done something wrong? Here is my complete code:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:background="#color/colorBasicGrey"
android:layout_marginBottom="2dp">
<View
android:id="#+id/item_indicator"
android:layout_width="8dp"
android:layout_height="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:background="#color/white"
android:layout_marginTop="24dp"
android:layout_marginLeft="24dp"/>
<TextView
android:id="#+id/group_member_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/group_member_join_group_request"
app:layout_constraintTop_toBottomOf="#id/item_indicator"
app:layout_constraintBottom_toTopOf="#id/item_indicator"
app:layout_constraintLeft_toRightOf="#id/item_indicator"
android:layout_marginLeft="8dp"
style="#style/general45"/>
<TextView
android:id="#+id/group_member_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#style/general45"
android:textAllCaps="true"
app:layout_constraintBaseline_toBaselineOf="#id/group_member_label"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="180dp"
tools:text="ABCDEFGHIJK"/>
<TextView
android:id="#+id/group_request_date_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/group_member_request_date_label"
app:layout_constraintTop_toBottomOf="#id/group_member_label"
app:layout_constraintLeft_toLeftOf="#id/group_member_label"
android:layout_marginTop="8dp"
style="#style/general45"/>
<TextView
android:id="#+id/group_request_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#style/general45"
android:textAllCaps="true"
app:layout_constraintBaseline_toBaselineOf="#id/group_request_date_label"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="180dp"
tools:text="28/10/2017"/>
<LinearLayout
android:id="#+id/admin_button_container"
android:layout_width="0dp"
android:layout_height="48dp"
android:layout_marginBottom="16dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
android:layout_marginTop="12dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#id/group_request_date_label"
app:layout_constraintVertical_bias="0.0"
app:layout_goneMarginTop="16dp"
app:layout_goneMarginLeft="24dp"
app:layout_goneMarginRight="24dp"
app:layout_goneMarginBottom="0dp"
android:visibility="gone">
<!--To simplify the question, I hided elements inside this LinearLayout-->
</LinearLayout>
</android.support.constraint.ConstraintLayout>

Figured it out.
goneMargin is used to indicate the margin to a GONE target, instead of itself being GONE.
Therefore in fact I should put the goneMargin attributes in the Request Date instead of the large rectangle.

Can't keep views from overlapping even when I use layout_margin

I can't figure out how to render my listItems correctly. Everything seems fine until the text title is too long. Looking at the pics below, I have the Title anchored on the left side of the listItem View and to the right of the imageView. I've even tried anchoring the right side to the right edge of the entire view but with no success. If the user enters a title too long the views overlap.
I want the title to be centered between the imageview and the left side of the entire listItem view. I have provided pics of how this all renders. Any help would be greatly appreciated. When the title gets long enough, it wraps the text which is fine. At this point I'd even settle for the trailing ... but I would prefer to have the text wrap. I just don't want to overlap the imageview. I have also posted the xml code
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp"
android:id="#+id/list_item_container">
<TextView
android:id="#+id/match_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAlignment="center"
android:textSize="16sp"
tools:text="Match Name"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="16dp"
app:layout_constraintRight_toLeftOf="#+id/imageView"
android:layout_marginRight="8dp"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"/>
<TextView
android:id="#+id/match_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
tools:text="Match Date"
android:textAlignment="center"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
app:layout_constraintRight_toLeftOf="#+id/imageView"
android:layout_marginRight="8dp"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="#+id/match_name"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="8dp"/>
<ImageView
android:id="#+id/imageView"
android:layout_width="60dp"
android:layout_height="45dp"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="true"
android:layout_marginEnd="8dp"
android:layout_weight="1"
app:srcCompat="#drawable/ic_more_vert_black_24dp"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="8dp"
android:layout_marginRight="68dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="8dp"
app:layout_constraintVertical_bias="0.484"/>
<TextView
android:id="#+id/match_id_hidden"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:visibility="invisible"
tools:layout_editor_absoluteY="67dp"
tools:layout_editor_absoluteX="24dp"/>
</android.support.constraint.ConstraintLayout>

Inside the ConstraintLayout try to always use "0dp" for your heights and widths and always set the app:layout_constraint..._to...Of for all 4 sides for all your views. Examine the outcome and then fine tune to get the expected result. Do this in the XML instead of in the visual editor; in my experience it is quicker and it avoids the layout_editor_absolute... settings.

Set android:layout_width="0dp" for both your TextViews. In a ConstraintLayout, a value of "0dp" basically means match the constraints. A value of "wrap_content" doesn't take constraints into account when measuring the views, just when positioning them.

TextView inside ConstraintLayout clips text and layout_margin cant not be shown correctly

I use :
compile 'com.android.support.constraint:constraint-layout:1.0.2'
The main problems are：
layout_margin can't be shown correctly;
child textview's text is clipped.
Details as below:
This is my xml:
<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"
android:background="#android:color/darker_gray"
android:padding="8dp">
<ImageView
android:id="#+id/reviewer_avatar"
android:layout_width="48dp"
android:layout_height="48dp"
android:background="#color/colorAccent"
android:contentDescription="#string/avatar"
android:layout_margin="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/reviewer_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/reviewer_name"
android:textSize="16sp"
app:layout_constraintBottom_toTopOf="#+id/comment_floor"
app:layout_constraintLeft_toRightOf="#+id/reviewer_avatar"
app:layout_constraintTop_toTopOf="#+id/reviewer_avatar"
app:layout_constraintVertical_chainStyle="packed"/>
<TextView
android:id="#+id/comment_floor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/reviewer_floor_text"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="#+id/reviewer_avatar"
app:layout_constraintLeft_toRightOf="#+id/reviewer_avatar"
app:layout_constraintTop_toBottomOf="#+id/reviewer_name"/>
<TextView
android:id="#+id/comment_period"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="6dp"
android:text="#string/comment_period_text"
android:textSize="12sp"
app:layout_constraintLeft_toRightOf="#+id/comment_floor"
app:layout_constraintTop_toBottomOf="#+id/reviewer_name"/>
<TextView
android:id="#+id/comment_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/large_text"
android:textSize="16sp"
app:layout_constraintLeft_toRightOf="#+id/reviewer_avatar"
app:layout_constraintTop_toBottomOf="#+id/reviewer_avatar"/>
</android.support.constraint.ConstraintLayout>
This is my screenshot:

Here are mainly two problems
You missing to set right constraint for view with parent
There was an bug in ConstraintLayout with wrap_content which is resolved , now you have to use match_constraint(0dp) and layout_constraintWidth_default property to solve this issue
add below two properties to largetext view
android:layout_width="0dp"
app:layout_constraintWidth_default="wrap"
app:layout_constraintRight_toRightOf="parent"
So your largetext view would be like
<TextView
android:id="#+id/comment_content"
android:layout_width="0dp"
app:layout_constraintWidth_default="wrap"
android:layout_height="wrap_content"
android:text="#string/large_text"
android:textSize="16sp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toRightOf="#+id/reviewer_avatar"
app:layout_constraintTop_toBottomOf="#+id/reviewer_avatar"/>

I think I found the answer to child textview's text is clipped.
I change it：
<TextView
android:id="#+id/comment_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/large_text"
android:textSize="16sp"
app:layout_constraintLeft_toRightOf="#+id/reviewer_avatar"
app:layout_constraintTop_toBottomOf="#+id/reviewer_avatar"/>
to
<TextView
android:id="#+id/comment_content"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="#string/large_text"
android:textSize="16sp"
app:layout_constraintLeft_toRightOf="#+id/reviewer_avatar"
app:layout_constraintTop_toBottomOf="#+id/reviewer_avatar"
app:layout_constraintRight_toRightOf="parent"/>
This would solve the problem !
But this way, TextView can't scalable，only fill width.
Finnaly, the better answer:
<TextView
android:id="#+id/comment_content"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="#string/reviewer_name"
android:textSize="16sp"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintLeft_toLeftOf="#+id/reviewer_name"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/reviewer_avatar"
app:layout_constraintWidth_default="wrap"/>

layout_margin can't be shown correctly; - margins space is outside view's bounds. app:layout_constraintLeft_toRightOf="#+id/reviewer_avatar" means that reviewer_name is constrained to the right side of reviewer_avatar not including margins. Set android:layout_marginLeft="8dp" of reviewer_name, comment_floor and comment_content.
child textview's text is clipped. - width of the comment_content is equal to the width of your ConstraintLayout, but the comment_content is constrained to the right side of reviewer_avatar. Therefore the right side of the comment_content goes beyond the boundaries of the ConstraintLayout, i.e. is clipped. Set the specific width of the comment_content for different screen sizes.

I believe this is a resize bug that should be fixed in 1.1 beta 1 (see https://androidstudio.googleblog.com/2017/05/constraintlayout-110-beta-1-release.html to install it) -- please try it and see if that's it.