With a Preview 1 of Android Studio 2.2 Google released a new layout in its support library: [`ConstraintLayout`][1]. With ConstraintLayout it is easier to use a Design tool in Android Studio, but I didn&#39;t find a way to use relative sizes (percents or &#39;weights&#39; like in LinearLayout). Is there a way to define the constraints based on percents? E.g. make a View take 40% of a screen, create 20% margin between views, set a View&#39;s width to 50% of another View&#39;s width?


  [1]: https://developer.android.com/reference/android/support/constraint/ConstraintLayout.html

How to make ConstraintLayout work with percentage values?

I am using `ConstraintLayout` in my application to make applications layout. I am trying to a create a screen wheren one `EditText` and `Button` should be in center and `Button` should be below of `EditText` with a marginTop only 16dp.

Here is my layout and screenshot how it is looking right now.

activity_authenticate_content.xml

	&lt;android.support.constraint.ConstraintLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
		xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
		xmlns:tools=&quot;http://schemas.android.com/tools&quot;
		android:layout_width=&quot;match_parent&quot;
		android:layout_height=&quot;match_parent&quot;
		android:paddingLeft=&quot;16dp&quot;
		android:paddingRight=&quot;16dp&quot;
		tools:context=&quot;com.icici.iciciappathon.login.AuthenticationActivity&quot;&gt;

		&lt;android.support.design.widget.TextInputLayout
			android:id=&quot;@+id/client_id_input_layout&quot;
			android:layout_width=&quot;0dp&quot;
			android:layout_height=&quot;wrap_content&quot;
			app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
			app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
			app:layout_constraintRight_toRightOf=&quot;parent&quot;
			app:layout_constraintTop_toTopOf=&quot;parent&quot;&gt;

			&lt;android.support.design.widget.TextInputEditText
				android:layout_width=&quot;match_parent&quot;
				android:layout_height=&quot;wrap_content&quot;
				android:hint=&quot;@string/login_client_id&quot;
				android:inputType=&quot;textEmailAddress&quot; /&gt;

		&lt;/android.support.design.widget.TextInputLayout&gt;

		&lt;android.support.v7.widget.AppCompatButton
			android:id=&quot;@+id/authenticate&quot;
			android:layout_width=&quot;0dp&quot;
			android:layout_height=&quot;wrap_content&quot;
			android:layout_marginTop=&quot;16dp&quot;
			android:text=&quot;@string/login_auth&quot;
			app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
			app:layout_constraintLeft_toLeftOf=&quot;@id/client_id_input_layout&quot;
			app:layout_constraintRight_toRightOf=&quot;@id/client_id_input_layout&quot;
			app:layout_constraintTop_toTopOf=&quot;@id/client_id_input_layout&quot; /&gt;

	&lt;/android.support.constraint.ConstraintLayout&gt;
[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/DXyTI.png

How to center the elements in ConstraintLayout

I am confused about the difference between `ConstraintLayout` and `RelativeLayout`. Could someone please tell me the exact differences between them? 

Differences between ConstraintLayout and RelativeLayout

A common use for [`LinearLayout`][1] is to evenly space (weight) views, for example:
[![example layout][2]][2]

How do you implement evenly spaced views like this using the new `ConstraintLayout`?

`ConstraintLayout` links for reference: [blog post][3], [I/O session video][4]

  [1]: https://developer.android.com/reference/android/widget/LinearLayout.html
  [2]: http://i.stack.imgur.com/eDnSi.png
  [3]: http://android-developers.blogspot.com.au/2016/05/android-studio-22-preview-new-ui.html
  [4]: https://www.youtube.com/watch?v=sO9aX87hq9c

Evenly spacing views using ConstraintLayout

I want to make a layout that lets me scroll down using constraint layout, but I don&#39;t know how to go about it. Should the `ScrollView` be the parent of the `ConstraintLayout` like this?

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;

    &lt;ScrollView xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        android:fillViewport=&quot;true&quot;&gt;

    &lt;android.support.constraint.ConstraintLayout
        android:id=&quot;@+id/Constraint&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;/&gt;
&lt;/ScrollView&gt;


Or the other way around? Maybe someone can point me to a good tutorial on this or give an example, I can&#39;t seem to find one. 

Also, I don&#39;t know if this is a bug or some configuration that I don&#39;t have set up but I&#39;ve seen images like this one :

[![enter image description here][1]][1]

where there are some components outside the blueprint &quot;blue rectangle&quot; yet they are visible, while on my side if I place a component on the &quot;white space&quot; I can&#39;t see it or move it anywhere, and it appears on the component tree. 

UPDATE :

I found a way to make the constraint layout scrollable in the design tool, using a horizontal guideline to push down the constraint layout border and extend it beyond the device, after that, you can use the guideline as the new bottom of the constraint layout to anchor the components.  


  [1]: https://i.stack.imgur.com/73yka.png

Android - how to make a scrollable constraintlayout?

I need help with `ConstraintSet`. My goal is to change view&#39;s constraints in code, but I cant figure out how to do this right.

I have 4 `TextView`s and one `ImageView`. I need to set `ImageView` constraints to one of the `TextView`s.

    check_answer4 = (TextView) findViewById(R.id.check_answer4);
    check_answer1 = (TextView) findViewById(R.id.check_answer1);
    check_answer2 = (TextView) findViewById(R.id.check_answer2);
    check_answer3 = (TextView) findViewById(R.id.check_answer3);

    correct_answer_icon = (ImageView) findViewById(R.id.correct_answer_icon);


If 1st answer is right, I need to set constraints of `ImageView` to

    app:layout_constraintRight_toRightOf=&quot;@+id/check_answer1&quot;
    app:layout_constraintTop_toTopOf=&quot;@+id/check_answer1&quot;

If 2nd answer is right, I need to set constraints of `ImageView` to

    app:layout_constraintRight_toRightOf=&quot;@+id/check_answer2&quot;
    app:layout_constraintTop_toTopOf=&quot;@+id/check_answer2&quot;

And so on.


ConstraintLayout: change constraints programmatically

I am trying to implement a simple chat bubble using a `ConstraintLayout`. This is what I am trying to achieve:

[![enter image description here][1]][1]
[![enter image description here][2]][2]

However, `wrap_content` does not do what I want. It respects the margins, but expands outside of the view bounds. Here is my layout:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;android.support.constraint.ConstraintLayout   xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;wrap_content&quot;&gt;

        &lt;TextView
            android:id=&quot;@+id/chat_message&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:padding=&quot;16dp&quot;
            app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
            app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
            app:layout_constraintRight_toRightOf=&quot;parent&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot;
            app:layout_constraintHorizontal_bias=&quot;0&quot;
            tools:background=&quot;@drawable/chat_message_bubble&quot;
            tools:text=&quot;Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris sodales accumsan tortor at bibendum.&quot;
            android:layout_marginStart=&quot;64dp&quot;
            android:layout_marginLeft=&quot;64dp&quot;
            android:layout_marginEnd=&quot;32dp&quot;
            android:layout_marginRight=&quot;32dp&quot;
            android:layout_marginTop=&quot;8dp&quot;
            android:layout_marginBottom=&quot;8dp&quot; /&gt;
    &lt;/android.support.constraint.ConstraintLayout&gt;

This renders as follows:

[![enter image description here][3]][3]

I am using `com.android.support.constraint:constraint-layout:1.0.0-beta4`.

Am I doing something wrong? Is it a bug or just an unintuitive behavior? Can I achieve the proper behavior using a `ConstraintLayout` (I know I can use other layouts, I am asking about `ConstrainLayout` specifically).


  [1]: https://i.stack.imgur.com/J2EJOm.png
  [2]: https://i.stack.imgur.com/0GsnMm.png
  [3]: https://i.stack.imgur.com/s80iSm.png

Wrap_content view inside a ConstraintLayout stretches outside the screen

**Recently trying to implement `Constraint Layout` but I found `Barrier` and `Guideline` works same.** Both works like divider. Is there any difference between them?

What is difference between Barrier and Guideline in Constraint Layout?

Is it possible to achieve negative margin on constraint layout to achieve overlap? 
I am trying to have a image centered on the layout and have a Text view such that it overlaps a by x dp. I tried setting negative margin value but no luck. 
It would be great if there is a way to achieve this.

How to achieve overlap/negative margin on Constraint Layout?

So recently, with Android Studio 2.2 there&#39;s a new ConstraintLayout that makes designing a lot easier, but unlike `RelativeLayout` and `Linearlayout`, I can&#39;t use a `ScrollView` to surround `ConstraintLayout`. Is this possible? If so, how?  

i.e.  

    &lt;ScrollView xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
            xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
            xmlns:tools=&quot;http://schemas.android.com/tools&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;match_parent&quot;
            tools:layout_editor_absoluteX=&quot;0dp&quot;
            tools:layout_editor_absoluteY=&quot;0dp&quot;&gt;
            
            &lt;android.support.constraint.ConstraintLayout
                android:id=&quot;@+id/constraintLayout&quot;
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;match_parent&quot;
                tools:layout_editor_absoluteX=&quot;0dp&quot;
                tools:layout_editor_absoluteY=&quot;0dp&quot;&gt;
                
                &lt;!-- Have whatever children you want inside --&gt;
                
            &lt;/android.support.constraint.ConstraintLayout&gt;
            
    &lt;/ScrollView&gt;

Is it possible to put a ConstraintLayout inside a ScrollView?

**Problem :**

    Error:Could not find com.android.support.constraint:constraint-layout:1.0.0-alpha2.
    Required by:
    myapp:app:unspecified

**Background :**
Android Studio 2.2 P 1

Gradle Sync failed could not find constraint-layout:1.0.0-alpha2

I&#39;m trying to add a `ProgressBar` on top of a `Button` (both are inside a `ConstraintLayout`).

    &lt;Button
        android:id=&quot;@+id/sign_in_button&quot;
        android:layout_width=&quot;280dp&quot;
        android:layout_height=&quot;75dp&quot;
        android:layout_marginBottom=&quot;75dp&quot;
        android:layout_marginTop=&quot;50dp&quot;
        android:text=&quot;@string/sign_in&quot;
        android:textColor=&quot;@color/white&quot;
        android:textSize=&quot;22sp&quot;
        android:textStyle=&quot;bold&quot;
        app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
        app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
        app:layout_constraintRight_toRightOf=&quot;parent&quot;
        app:layout_constraintTop_toBottomOf=&quot;@+id/passwordEditText&quot;
        app:layout_constraintVertical_bias=&quot;0.0&quot;/&gt;

    &lt;ProgressBar
        android:id=&quot;@+id/progressBar&quot;
        style=&quot;?android:attr/progressBarStyle&quot;
        android:layout_width=&quot;wrap_content&quot;
        android:layout_height=&quot;wrap_content&quot;
        app:layout_constraintTop_toTopOf=&quot;@+id/sign_in_button&quot;
        android:layout_marginTop=&quot;8dp&quot;
        app:layout_constraintBottom_toBottomOf=&quot;@+id/sign_in_button&quot;
        android:layout_marginBottom=&quot;8dp&quot;
        app:layout_constraintVertical_bias=&quot;0.5&quot;
        android:layout_marginLeft=&quot;8dp&quot;
        app:layout_constraintLeft_toLeftOf=&quot;@+id/sign_in_button&quot;
        android:layout_marginRight=&quot;8dp&quot;
        app:layout_constraintRight_toRightOf=&quot;@+id/sign_in_button&quot;/&gt;

But even after calling `bringToFront` on the `ProgressBar` in `onCreate`, it always stays behind the `Button`.

    ProgressBar progressBar = (ProgressBar)findViewById(R.id.progressBar);
    progressBar.bringToFront();

Android ConstraintLayout - Put one view on top of another view

How to vertically align and center objects in constraint layout? It is possible to align vertically or horizontally but I have not found a way to center at the same time beside constraining the views between two gridlines. 

Vertical Align Center:
[![enter image description here][1]][1]


It seems like centering is a huge problem with constraint layout which forces me to go back to relative layout for &quot;centerInParent&quot;, &quot;centerVertical&quot;, and &quot;centerHorizontal&quot;. 

I would like to create the layout boxed in red using constraint layout:
[![enter image description here][2]][2]

Unfortunately, the only way I found without using two gridlines is with nested Relative and LinearLayouts (which Constraint Layout was supposed to solve this exact scenario!).

Layout using Relative and Linear Layout:

    &lt;RelativeLayout
        android:layout_width=&quot;0dp&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:layout_marginTop=&quot;12dp&quot;
        app:layout_constraintTop_toBottomOf=&quot;@id/user_points&quot;
        app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
        app:layout_constraintRight_toRightOf=&quot;parent&quot;&gt;

        &lt;LinearLayout
            android:id=&quot;@+id/stat_1_layout&quot;
            android:layout_width=&quot;60dp&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginLeft=&quot;12dp&quot;
            android:layout_marginRight=&quot;12dp&quot;
            android:layout_centerVertical=&quot;true&quot;
            android:layout_toLeftOf=&quot;@+id/divider_1&quot;
            android:orientation=&quot;vertical&quot;&gt;

            &lt;TextView
                android:id=&quot;@+id/stat_1&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_gravity=&quot;center_horizontal&quot;
                android:gravity=&quot;center_horizontal&quot;
                android:text=&quot;10&quot;
                android:textSize=&quot;16dp&quot;
                android:textColor=&quot;@color/textSecondaryDark&quot;
                android:maxLines=&quot;1&quot;/&gt;

            &lt;TextView
                android:id=&quot;@+id/stat_detail_1&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_gravity=&quot;center_horizontal&quot;
                android:gravity=&quot;center&quot;
                android:text=&quot;Streak&quot;
                android:textSize=&quot;8sp&quot;
                android:textColor=&quot;@color/textSecondary&quot;
                android:maxLines=&quot;1&quot;/&gt;
        &lt;/LinearLayout&gt;

        &lt;View
            android:id=&quot;@+id/divider_1&quot;
            android:layout_width=&quot;1dp&quot;
            android:layout_height=&quot;38dp&quot;
            android:layout_toLeftOf=&quot;@+id/stat_2_layout&quot;
            android:background=&quot;@drawable/linedivider&quot;/&gt;

        &lt;LinearLayout
            android:id=&quot;@+id/stat_2_layout&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginLeft=&quot;18dp&quot;
            android:layout_marginRight=&quot;18dp&quot;
            android:layout_centerInParent=&quot;true&quot;
            android:orientation=&quot;vertical&quot;&gt;

            &lt;TextView
                android:id=&quot;@+id/stat_2&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_gravity=&quot;center_horizontal&quot;
                android:gravity=&quot;center_horizontal&quot;
                android:text=&quot;243&quot;
                android:textSize=&quot;16dp&quot;
                android:textColor=&quot;@color/textSecondaryDark&quot;
                android:maxLines=&quot;1&quot;/&gt;

            &lt;TextView
                android:id=&quot;@+id/stat_detail_2&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_gravity=&quot;center_horizontal&quot;
                android:gravity=&quot;center&quot;
                android:text=&quot;Calories Burned&quot;
                android:textSize=&quot;8sp&quot;
                android:textColor=&quot;@color/textSecondary&quot;
                android:maxLines=&quot;1&quot;/&gt;
        &lt;/LinearLayout&gt;

        &lt;View
            android:id=&quot;@+id/divider_2&quot;
            android:layout_width=&quot;1dp&quot;
            android:layout_height=&quot;38dp&quot;
            android:layout_toRightOf=&quot;@+id/stat_2_layout&quot;
            android:background=&quot;@drawable/linedivider&quot;/&gt;

        &lt;LinearLayout
            android:id=&quot;@+id/stat_3_layout&quot;
            android:layout_width=&quot;60dp&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginLeft=&quot;12dp&quot;
            android:layout_marginRight=&quot;12dp&quot;
            android:layout_toRightOf=&quot;@+id/divider_2&quot;
            android:layout_centerVertical=&quot;true&quot;
            android:orientation=&quot;vertical&quot;&gt;

            &lt;TextView
                android:id=&quot;@+id/stat_3&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_gravity=&quot;center_horizontal&quot;
                android:gravity=&quot;center_horizontal&quot;
                android:text=&quot;3200&quot;
                android:textSize=&quot;16dp&quot;
                android:textColor=&quot;@color/textSecondaryDark&quot;
                android:maxLines=&quot;1&quot;/&gt;

            &lt;TextView
                android:id=&quot;@+id/stat_detail_3&quot;
                android:layout_width=&quot;wrap_content&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_gravity=&quot;center_horizontal&quot;
                android:gravity=&quot;center&quot;
                android:text=&quot;Steps&quot;
                android:textSize=&quot;8sp&quot;
                android:textColor=&quot;@color/textSecondary&quot;
                android:maxLines=&quot;1&quot;/&gt;
        &lt;/LinearLayout&gt;
    &lt;/RelativeLayout&gt;

  [1]: https://i.stack.imgur.com/lBO3P.png
  [2]: https://i.stack.imgur.com/H6pvq.png

Constraint Layout Vertical Align Center

I would like to constrain a View&#39;s left and right sides to it&#39;s parent view&#39;s margins and make it fill the allotted space. However, setting width to either `match_parent` or `wrap_content` appears to produce the same result.

Is there something equivalent to match_constraints (as opposed to match_parent and wrap_content)? Do `match_parent` and `wrap_content` affect the layout or are they ignored in the new constraint layout?

Set width to match constraints in ConstraintLayout

Consider the following layout file:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;RelativeLayout
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;&gt;
    
        &lt;android.support.constraint.ConstraintLayout
            android:id=&quot;@+id/activity_main&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;match_parent&quot;
            android:background=&quot;#FF0000&quot;
            android:paddingBottom=&quot;@dimen/activity_vertical_margin&quot;
            android:paddingLeft=&quot;@dimen/activity_horizontal_margin&quot;
            android:paddingRight=&quot;@dimen/activity_horizontal_margin&quot;
            android:paddingTop=&quot;@dimen/activity_vertical_margin&quot;&gt;
    
            &lt;ImageView
                android:layout_width=&quot;0dp&quot;
                android:layout_height=&quot;0dp&quot;
                android:background=&quot;#0000FF&quot;
                android:padding=&quot;16dp&quot;
                app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
                app:layout_constraintTop_toTopOf=&quot;parent&quot;
                app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
                app:layout_constraintDimensionRatio=&quot;H,3:1&quot;
                tools:layout_editor_absoluteX=&quot;16dp&quot; /&gt;
    
        &lt;/android.support.constraint.ConstraintLayout&gt;
    
    &lt;/RelativeLayout&gt;

I am not sure how the app:layout_constraintDimensionRatio works. My understanding is the ratio will always be width:height. So 3:1 will always make the ImageView appear 3 times wider than height. The prefix H or W tells ConstraintLayout which dimension should respect the ratio. If it is H then it means width will be first computed from other constraints and then height will be adjusted according to the aspect ratio. However this is the result of the layout:

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/ll6xd.png

The height is 3 times larger than width which is unexpected. Can anyone explain to me how the dimensions are computed with respect to app:layout_constraintDimensionRatio setting?

ConstraintLayout aspect ratio

I have two header views, `HeaderViewA` and `HeaderViewB`. These views can have any combination of visibility `visible` or `gone`.

I need `BigView` to be positioned **under** the **lowest** of either `HeaderViewA`/`HeaderViewB`.

Is this possible without nesting in `ConstraintLayout`?

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/sjBwU.png

How to position below the lowest of two views in ConstraintLayout?

I&#39;m having a problem to programmatically add views to a `ConstraintLayout`, and set up all the constraints required for the layout to work.  

What I have at the moment doesn&#39;t work:

    ConstraintLayout layout = (ConstraintLayout) findViewById(R.id.mainConstraint);
    ConstraintSet set = new ConstraintSet();
    set.clone(layout);

    ImageView view = new ImageView(this);
    layout.addView(view,0);
    set.connect(view.getId(), ConstraintSet.TOP, layout.getId(), ConstraintSet.TOP, 60);
    set.applyTo(layout);

The `ImageView` doesn&#39;t even appear on the layout. When adding to a `RelativeLayout`, it works like a charm.

What can I do to create the constraints I need, so that my layout work again?

How to programmatically add views and constraints to a ConstraintLayout?

Background
--

Google has announced a new layout called &quot;[**ConstraintLayout**][1]&quot; that&#39;s supposed to be the ultimate layout, that could replace all of the layouts while staying flat (without nested layouts) and have better performance.

The problem
--
Thing is, I barely see any tutorials for it that could help me on this matter, other than the video presented on Google IO. 

What I am trying to do is, given that I have a vertically-centered LinearLayout within another layout - convert them both into a single ConstraintLayout.

After all, this is the purpose of this new layout...

The layout I wish to deal with looks like this:

[![enter image description here][2]][2]

Notice that the views in the center are only centered vertically, and that the 2 textViews are to the right of the ImageView, which is also centered vertically.

This all works well with RelativeLayout, which has the LinearLayout of the 2 TextViews, but I wish to know how to convert them into a single ConstraintLayout.

Here&#39;s a sample XML of what I&#39;ve shown:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;RelativeLayout
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:minHeight=&quot;?attr/listPreferredItemHeightSmall&quot;&gt;
    
        &lt;ImageView
            android:id=&quot;@+id/appIconImageView&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_alignParentLeft=&quot;true&quot;
            android:layout_alignParentStart=&quot;true&quot;
            android:layout_centerVertical=&quot;true&quot;
            android:layout_marginEnd=&quot;4dp&quot;
            android:layout_marginLeft=&quot;2dp&quot;
            android:layout_marginRight=&quot;4dp&quot;
            android:layout_marginStart=&quot;2dp&quot;
            android:adjustViewBounds=&quot;true&quot;
            android:src=&quot;@android:drawable/sym_def_app_icon&quot;
            tools:ignore=&quot;ContentDescription&quot;/&gt;
    
        &lt;LinearLayout
            android:id=&quot;@+id/appDetailsContainer&quot;
            android:layout_width=&quot;0px&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_centerVertical=&quot;true&quot;
            android:layout_toEndOf=&quot;@+id/appIconImageView&quot;
            android:layout_toLeftOf=&quot;@+id/overflowView&quot;
            android:layout_toRightOf=&quot;@+id/appIconImageView&quot;
            android:layout_toStartOf=&quot;@+id/overflowView&quot;
            android:orientation=&quot;vertical&quot;&gt;
    
            &lt;TextView
                android:id=&quot;@+id/appLabelTextView&quot;
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:ellipsize=&quot;marquee&quot;
                android:text=&quot;label&quot;
                android:textAppearance=&quot;?android:attr/textAppearanceLarge&quot;
                android:textDirection=&quot;locale&quot;
                tools:ignore=&quot;HardcodedText,UnusedAttribute&quot;/&gt;
    
            &lt;TextView
                android:id=&quot;@+id/appDescriptionTextView&quot;
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:ellipsize=&quot;marquee&quot;
                android:minLines=&quot;3&quot;
                android:text=&quot;description&quot;
                android:textAppearance=&quot;?android:attr/textAppearanceSmall&quot;
                android:textDirection=&quot;locale&quot;
                tools:ignore=&quot;HardcodedText,UnusedAttribute&quot;/&gt;
        &lt;/LinearLayout&gt;
    
        &lt;ImageView
            android:id=&quot;@+id/overflowView&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_alignParentEnd=&quot;true&quot;
            android:layout_alignParentRight=&quot;true&quot;
            android:layout_alignParentTop=&quot;true&quot;
            android:adjustViewBounds=&quot;true&quot;
            android:background=&quot;?attr/selectableItemBackground&quot;
            android:clickable=&quot;true&quot;
            android:padding=&quot;10dp&quot;
            app:srcCompat=&quot;@drawable/ic_more_vert_black_24dp&quot;
    
            tools:src=&quot;@drawable/ic_more_vert_black_24dp&quot;
            tools:ignore=&quot;ContentDescription&quot;/&gt;
    
        &lt;ImageView
            android:id=&quot;@+id/isSystemAppImageView&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_alignEnd=&quot;@+id/overflowView&quot;
            android:layout_alignLeft=&quot;@+id/overflowView&quot;
            android:layout_alignParentBottom=&quot;true&quot;
            android:layout_alignRight=&quot;@+id/overflowView&quot;
            android:layout_alignStart=&quot;@+id/overflowView&quot;
            android:adjustViewBounds=&quot;true&quot;
            android:scaleType=&quot;centerInside&quot;
            app:srcCompat=&quot;@drawable/ic_warning_black_24dp&quot;
            tools:ignore=&quot;ContentDescription&quot;
            tools:src=&quot;@drawable/ic_warning_black_24dp&quot;/&gt;
    
    &lt;/RelativeLayout&gt;


What I tried
--
I tried to read some articles and watch some videos of Google :

- https://codelabs.developers.google.com/codelabs/constraint-layout/index.html#0
- https://www.youtube.com/watch?v=sO9aX87hq9c
- https://youtu.be/csaXml4xtN8?t=1693

That didn&#39;t help, so I tried to using it, hoping I will find out how to use it myself.
But I can&#39;t find out how to do it. I tried using the feature to convert the layouts, but this makes a huge mess of the views and puts additional margins that I don&#39;t want to have.


The question
--
How can I convert the 2 layouts into a single ConstraintLayout ? 


  [1]: http://tools.android.com/tech-docs/layout-editor
  [2]: http://i.stack.imgur.com/145Fv.png

How to center multiple Views together using ConstraintLayout?

I&#39;m using constraintLyout v 1.0.1.

I would like to include in my xml a sub ConstraintLayout corresponding to a part of my global layout (which itself is a ConstraintLayout). I split the layout in two xmls in order to use this sub part elsewhere

I tried this but I have no control on where to place my sub constraint layout in the parent. I wonder if I have to place everything in the same xml file or if their is a solution to use separate files.

*tmp_1.xml*

    &lt;android.support.constraint.ConstraintLayout
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:orientation=&quot;vertical&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        &gt;
        &lt;TextView
            android:id=&quot;@+id/label&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:text=&quot;LABEL1&quot;
            app:layout_constraintStart_toStartOf=&quot;parent&quot;
            app:layout_constraintEnd_toEndOf=&quot;parent&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot;
            android:layout_marginTop=&quot;16dp&quot;
            /&gt;
        &lt;TextView
            android:id=&quot;@+id/label_2&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:text=&quot;LABEL2&quot;
            app:layout_constraintStart_toStartOf=&quot;@id/label&quot;
            app:layout_constraintEnd_toEndOf=&quot;@id/label&quot;
            app:layout_constraintTop_toBottomOf=&quot;@id/label&quot;
            android:layout_marginTop=&quot;16dp&quot;
            /&gt;

        &lt;include layout=&quot;@layout/tmp_2&quot; /&gt;
    &lt;/android.support.constraint.ConstraintLayout&gt;
*tmp_2.xml*


    &lt;android.support.constraint.ConstraintLayout
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:orientation=&quot;vertical&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        &gt;
        &lt;TextView
            android:id=&quot;@+id/view_80&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:text=&quot;80th element&quot;
            app:layout_constraintStart_toStartOf=&quot;parent&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot;
            android:layout_marginTop=&quot;10dp&quot;
            android:layout_marginStart=&quot;12dp&quot;
            /&gt;
    &lt;/android.support.constraint.ConstraintLayout&gt;

The result is this 

[![Actual result][1]][1]


But i want it to be this

[![Expected result][2]][2]
 

I tried this but it does not work 

    &lt;include 
        app:layout_constraintTop_toBottomOf=&quot;@id/label_2&quot;
        layout=&quot;@layout/tmp_2&quot; /&gt;


  [1]: https://i.stack.imgur.com/wfmjH.png
  [2]: https://i.stack.imgur.com/LCS3H.png

How to include constraint layout to another constraint layout and set constraint between each

In my layout, I have a `ConstraintLayout` containing two `TextView` elements. They are currently the same size, but I would like them to have different weights with a `6:4` ratio.

How can this be achieved in my `ConstraintLayout`?

How to add different weight to ConstraintLayout views

I want to remove and add constraint programmatically based on some condition. Here are the screenshots:

[![The button &quot;create ad&quot; has a top constraint][1]][1]

and I want to remove it like this but in code:

[![here is button with removed constraint on top][2]][2]

so the same effect in want to achieve programmatically

and here is the code that I tried:


        if (advertisements.size() &gt; 0) { //my own condition
            ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) btnCreateAd.getLayoutParams();
            layoutParams.topToBottom = R.id.imvEmpty; //the imageview that is in center of the view
            btnCreateAd.setLayoutParams(layoutParams);
            recyclerView.setVisibility(View.VISIBLE);
            txvMyAdEmptyText.setVisibility(View.GONE);
            imvEmpty.setVisibility(View.GONE);
            adapter.setList(advertisements);
            adapter.notifyDataSetChanged();
        } else {
            ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) btnCreateAd.getLayoutParams();
            layoutParams.topToBottom = -1; //here i am trying to remove top constraint but it doesn&#39;t work
            btnCreateAd.setLayoutParams(layoutParams);

            recyclerView.setVisibility(View.GONE);
            txvMyAdEmptyText.setVisibility(View.VISIBLE);
            imvEmpty.setVisibility(View.VISIBLE);
            adapter.setList(new ArrayList&lt;Advertisement&gt;());
        }
        mConstraintView.invalidate(); //this is my constraint view

**EDIT**

I have [tried using][3] `ConstraintSet` also, but the result was even different somehow my RecyclerView (which is set to boundaries of parent view) was disappearing

     ConstraintSet set = new ConstraintSet();
        set.clone(parentView);

        if (advertisements.size() &gt; 0) {

            recyclerView.setVisibility(View.VISIBLE);
            txvMyAdEmptyText.setVisibility(View.GONE);
            imvEmpty.setVisibility(View.GONE);
            adapter.setList(advertisements);
            adapter.notifyDataSetChanged();

        } else {

            set.connect(btnCreateAd.getId(), ConstraintSet.TOP, imvEmpty.getId(), ConstraintSet.BOTTOM, 0);

            recyclerView.setVisibility(View.GONE);
            txvMyAdEmptyText.setVisibility(View.VISIBLE);
            imvEmpty.setVisibility(View.VISIBLE);
            adapter.setList(new ArrayList&lt;Advertisement&gt;());
        }
        set.connect(btnCreateAd.getId(), ConstraintSet.END, ConstraintSet.PARENT_ID, ConstraintSet.END, 0);
        set.connect(btnCreateAd.getId(), ConstraintSet.START, ConstraintSet.PARENT_ID, ConstraintSet.START, 0);
        set.connect(btnCreateAd.getId(), ConstraintSet.BOTTOM, ConstraintSet.PARENT_ID, ConstraintSet.BOTTOM, 0);

        set.applyTo(parentView);


  [1]: https://i.stack.imgur.com/IfUS9.png
  [2]: https://i.stack.imgur.com/q21qC.png
  [3]: https://developer.android.com/reference/android/support/constraint/ConstraintSet.html

Removing/Adding constraint programmatically in ConstraintLayout

What to implement: `ConstraintLayout` or `CoordinatorLayout` for proper material design in android ?

ConstraintLayout vs Coordinator layout?

I have a guideline in constraint layout like this 


    &lt;android.support.constraint.Guideline
        android:layout_width=&quot;wrap_content&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:id=&quot;@+id/guideline8&quot;
        app:layout_constraintGuide_percent=&quot;0.5&quot;
        android:orientation=&quot;vertical&quot;/&gt;

Later I want to change the `app:layout_constraintGuide_percent` value to something else conditionally. How can I achieve this.



Change Guideline percentage in constraint layout programmatically

I&#39;m using ConstraintLayout where I will show as below

[![enter image description here][1]][1]

I would like to hide `First` (using gone), and which the view I expect to be as below (where ElasticBody will stretch over to use up the original `First` view space as well.

[![enter image description here][2]][2]

However, when I actual set `First` to `gone`, my view turn out to be as below (all image as from Android Studio Design view). My `Elastic Body` is missing as well, and the height expanded weirdly.

[![enter image description here][3]][3]

My layout code as below


    &lt;android.support.constraint.ConstraintLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:padding=&quot;16dp&quot;&gt;
    
        &lt;TextView
            android:id=&quot;@+id/txt_first&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:background=&quot;#0ff&quot;
            android:text=&quot;First&quot;
            android:visibility=&quot;gone&quot;
            android:textSize=&quot;26sp&quot;
            app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
            app:layout_constraintEnd_toStartOf=&quot;@+id/txt_body&quot;
            app:layout_constraintStart_toStartOf=&quot;parent&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot; /&gt;
    
        &lt;TextView
            android:id=&quot;@+id/txt_body&quot;
            android:layout_width=&quot;0dp&quot;
            android:background=&quot;#f0f&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:text=&quot;Elastic Body&quot;
            android:textSize=&quot;26sp&quot;
    
            app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
            app:layout_constraintEnd_toStartOf=&quot;@+id/txt_tail&quot;
            app:layout_constraintStart_toEndOf=&quot;@+id/txt_first&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot; /&gt;
    
        &lt;TextView
            android:id=&quot;@+id/txt_tail&quot;
            android:background=&quot;#ff0&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:text=&quot;Tail&quot;
            android:textSize=&quot;26sp&quot;
            app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
            app:layout_constraintEnd_toEndOf=&quot;parent&quot;
            app:layout_constraintStart_toEndOf=&quot;@+id/txt_body&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot; /&gt;
    
    &lt;/android.support.constraint.ConstraintLayout&gt;

(Note, if you remove the `gone`, you&#39;ll get the first image view).
Why is this so? How could I fix it where when my `First` is gone, I could the `Elastic Body` stretch out correctly? 

p/s: I know how to do it in LinearLayout and RelativeLayout... but wonder if this is a limitation on ConstraintLayout?

  [1]: https://i.stack.imgur.com/lA0fl.png
  [2]: https://i.stack.imgur.com/GzcOZ.png
  [3]: https://i.stack.imgur.com/XINt0.png

ConstraintLayout, when constraint dependent view is gone, the layout view behave weirdly

I have a view in ConstrainLayout as follows. 

    &lt;TextView
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:maxWidth=&quot;260dp&quot;
            android:textColor=&quot;#FFF&quot;
            android:textSize=&quot;16sp&quot;
            app:layout_constraintLeft_toLeftOf=&quot;@+id/parent&quot;
            app:layout_constraintTop_toBottomOf=&quot;@id/message_date&quot;
            android:id=&quot;@+id/text_main&quot;
            /&gt;

I would like to change the view to either `app:layout_constraintLeft_toLeftOf=&quot;@+id/parent&quot;` or `layout_constraintLeft_toRightOf=&quot;@+id/parent&quot;` programmatically in recycleViewHolder based on some conditions.

Android : How to programmatically set layout_constraintRight_toRightOf &quot;parent&quot;

I&#39;m making a simple test app using ConstraintLayout, but I have a problem. 

Here is my code:

**activity_main.xml**

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;layout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;&gt;

    &lt;android.support.constraint.ConstraintLayout
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        tools:context=&quot;com.example.user.myapplication.activity.MainActivity&quot;&gt;

        &lt;Button
            android:id=&quot;@+id/btn_launch&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginEnd=&quot;8dp&quot;
            android:layout_marginTop=&quot;16dp&quot;
            android:text=&quot;launch&quot;
            app:layout_constraintHorizontal_bias=&quot;1.0&quot;
            app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
            app:layout_constraintRight_toRightOf=&quot;parent&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot; /&gt;

        &lt;TextView
            android:id=&quot;@+id/text_view&quot;
            android:layout_width=&quot;100dp&quot;
            android:layout_height=&quot;50dp&quot;
            android:layout_marginEnd=&quot;16dp&quot;
            android:layout_marginTop=&quot;16dp&quot;
            android:text=&quot;Hello World!&quot;
            app:layout_constraintHorizontal_bias=&quot;1&quot;
            app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
            app:layout_constraintRight_toRightOf=&quot;parent&quot;
            app:layout_constraintTop_toBottomOf=&quot;@+id/btn_launch&quot; /&gt;

        &lt;include
            layout=&quot;@layout/content_main&quot;
            app:layout_constraintBottom_toBottomOf=&quot;parent&quot;
            app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
            app:layout_constraintRight_toRightOf=&quot;parent&quot;
            app:layout_constraintTop_toBottomOf=&quot;@+id/text_view&quot; /&gt;

    &lt;/android.support.constraint.ConstraintLayout&gt;
&lt;/layout&gt;

**content_main.xml**

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;layout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;&gt;

    &lt;android.support.constraint.ConstraintLayout
        android:layout_width=&quot;wrap_content&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:orientation=&quot;vertical&quot;&gt;

        &lt;TextView
            android:id=&quot;@+id/textView2&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginTop=&quot;8dp&quot;
            android:text=&quot;123456&quot;
            app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
            app:layout_constraintRight_toRightOf=&quot;parent&quot;
            app:layout_constraintTop_toTopOf=&quot;parent&quot; /&gt;

        &lt;TextView
            android:id=&quot;@+id/textView3&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginLeft=&quot;8dp&quot;
            android:layout_marginRight=&quot;8dp&quot;
            android:layout_marginTop=&quot;8dp&quot;
            android:text=&quot;98765&quot;
            app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
            app:layout_constraintRight_toRightOf=&quot;parent&quot;
            app:layout_constraintTop_toBottomOf=&quot;@+id/textView2&quot; /&gt;

        &lt;TextView
            android:id=&quot;@+id/textView&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginLeft=&quot;8dp&quot;
            android:layout_marginRight=&quot;8dp&quot;
            android:layout_marginTop=&quot;8dp&quot;
            android:text=&quot;abc&quot;
            app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
            app:layout_constraintRight_toRightOf=&quot;parent&quot;
            app:layout_constraintTop_toBottomOf=&quot;@+id/textView3&quot; /&gt;

    &lt;/android.support.constraint.ConstraintLayout&gt;
&lt;/layout&gt;

**Code result**
 
[![Problem][1]][1]

&lt;/br&gt;

 I want &quot;**content_main**&quot; to be under the &quot;Hello world!&quot; TextView.

I using RelativeLayout, LinearLayout, ConstraintLayout at &quot;**content_main**&quot; element, but they do not not work.

I don&#39;t find any solution.

Does the Android &quot;include&quot; tag not work with ConstraintLayout? 

  [1]: https://i.stack.imgur.com/aFdND.png 


Android add other layout in ConstraintLayout using include tag

## UPDATE JULY 2020: 
Added information in the answer below to explain in more detail why/what does `constrainedWidth/Height` do and when it&#39;s applicable to use them.

## UPDATE JULY 2018: 
If you are using `ConstraintLayout 1.1.0`, the correct property to use is `app:layout_constrainedWidth=&quot;true&quot;` in place of the old `app:layout_constraintWidth_default=&quot;wrap&quot;` (and the height counterpart). See updated answer. 

## UPDATE NOVEMBER 2017: 
If you are using `ConstraintLayout 1.0.0` stable (or above) (1.0.2 at this time), see the updated Answer for a simpler solution without the need to nest layouts. 


## Original Question:
Using `ConstraintLayouts-Beta3` released on Nov 3rd 2016. ([source][1]) 

I&#39;m trying to do the following:

```
|                                        |
|&lt;-[TextView]&lt;-&gt;[ImageView] -----------&gt; |
|                                        |
```

Which I have achieved with a layout like so:

      &lt;TextView
          android:id=&quot;@+id/textView&quot;
          android:layout_height=&quot;wrap_content&quot;
          android:layout_width=&quot;wrap_content&quot;

          app:layout_constraintHorizontal_chainStyle=&quot;packed&quot;

          app:layout_constraintLeft_toLeftOf=&quot;parent&quot;
          app:layout_constraintTop_toTopOf=&quot;parent&quot;
          app:layout_constraintRight_toLeftOf=&quot;@+id/caret&quot;
          app:layout_constraintHorizontal_bias=&quot;0.0&quot;

          android:text=&quot;Some Text&quot;
          android:textAlignment=&quot;viewStart&quot;
          android:gravity=&quot;start&quot; /&gt;

      &lt;ImageView
          android:id=&quot;@+id/caret&quot;
          android:layout_width=&quot;wrap_content&quot;
          android:layout_height=&quot;8dp&quot;
          app:layout_constraintDimensionRatio=&quot;1:1&quot;

          app:layout_constraintLeft_toRightOf=&quot;@+id/textView&quot;
          app:layout_constraintRight_toRightOf=&quot;parent&quot;

          app:layout_constraintTop_toTopOf=&quot;@+id/textView&quot;
          app:layout_constraintBottom_toBottomOf=&quot;@+id/textView&quot;


          app:layout_constraintHorizontal_bias=&quot;0.0&quot;

          android:contentDescription=&quot;&quot;
          app:srcCompat=&quot;@drawable/ic_selection&quot;
          android:layout_marginStart=&quot;8dp&quot;/&gt;

This looks ok, but when the text is longer than the available space…

```
|                                        |
|&lt;-[TextView Larger Than The Space Avail]|
|                                        |
```
The text view has a style that specifies these: 

    &lt;item name=&quot;android:lines&quot;&gt;1&lt;/item&gt;
    &lt;item name=&quot;android:maxLines&quot;&gt;1&lt;/item&gt;
    &lt;item name=&quot;android:ellipsize&quot;&gt;end&lt;/item&gt;

So it _should_ work, but I&#39;m not sure what constraints I need to have the image slide until the right and then _stop_ there and let the text view understand there&#39;s no more space.

What am I missing?

Note: If I set the textview&#39;s width to the 0dp, it works, but then the image is always on the right (horizontal Bias seems to be ignored for it)

Note2: &lt;strike&gt;I have tried this with beta2 as well, in fact, it seems like Beta3 has a [bug in the visual editor][2].&lt;/strike&gt; 

**UPDATE**: I tried to replicate this in Xcode/AutoLayout:

This is how it looks with a Short Text

[![Short Text][3]][3]

Now the same layout, I just type a long text in the text view…

[![Long Text][4]][4]

As you can see the trail (right) constraint for the image view says: you&#39;re _8 or more_ points from the right margin. 

It&#39;s also pinned to the left to the label (textView). 

From what I have just learned from Twitter, this _may not be possible_ on Android&#39;s ConstraintLayout at the moment: [Source][5]


  [1]: http://tools.android.com/recent/constraintlayoutbeta3isnowavailable
  [2]: https://code.google.com/p/android/issues/detail?id=227033&amp;thanks=227033&amp;ts=1478207728
  [3]: https://i.stack.imgur.com/nysIS.jpg
  [4]: https://i.stack.imgur.com/txdpW.jpg
  [5]: https://twitter.com/camaelon/status/794297707900715008

ConstraintLayout Chains and Text Ellipsis + Image on the Right

When I try to use `ConstraintLayout` in my layout `content_main.xml`, I get the following message:

&gt; Using version 1.0.0-alpha5 of the constraint library, which is obsolete

I am currently using the following library dependency:

    compile &#39;com.android.support.constraint:constraint-layout:1.0.0-alpha5&#39;

How can I get the latest version number of constraint layout?

All Android Constraintlayout Solutions on Gang of Coders

Total of 28 Android Constraintlayout Solutions