I'm trying to centre two textviews vertically using constraint layout chains. I know I can wrap the text layouts in a linear layout but I wanted to try out the new chain feature. When I build my project though I get an error, Error:(28, 50) No resource found that matches the given name (at 'layout_constraintBottom_toTopOf' with value '#id/item_school_location').
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="72dp">
<ImageView
android:id="#+id/item_school_logo"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_marginStart="16dp"
android:contentDescription="#string/item_school_logo_description"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.5" />
<TextView
android:id="#+id/item_school_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="72dp"
android:maxLines="1"
android:textAppearance="#style/TextAppearance.AppCompat.Light.SearchResult.Subtitle"
app:layout_constraintBottom_toTopOf="#id/item_school_location"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.5"
app:layout_constraintVertical_chainPacked="true" />
<TextView
android:id="#+id/item_school_location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="72dp"
android:maxLines="1"
android:textAppearance="#style/TextAppearance.AppCompat.Small"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#id/item_school_name" />
</android.support.constraint.ConstraintLayout>
</layout>
Anyone know what's causing this error?
app:layout_constraintLeft_toLeftOf="parent"
Maybe I'm not completely up to date, but I think the value shouldn't be "parent" - it should be a view ID (in the format of "#+id/some_id").
Give your constraint layout an id and then try using that instead of parent.
Edit: I guess I am out of date on this? Because I just read that again, and your error seems like this line:
layout_constraintBottom_toTopOf="#id/item_school_location"
is missing the + after # - as in it should be
layout_constraintBottom_toTopOf="#+id/item_school_location"
I think the
No resource found that matches the given name
error is due to the fact that you are referencing the id of an element (item_school_location) that is declared after the element referencing it (item_school_name).
In this case, it would help if you declare the ids of your related elements in a separate ids.xml file (check this: https://stackoverflow.com/a/12247971)
Related
I am new to Android Studio. I started building an app. This is the code of my xml file. I can't figure out the problem! This is the exact error code that I am getting."ParseError at [row,col]:[60,1]
Message: XML document structures must start and end within the same entity."
<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
android:background="#121212"
tools:context=".MainActivity"
>
<ImageView
android:id="#+id/imageView"
android:layout_width="844dp"
android:layout_height="1090dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.501"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.988"
app:srcCompat="#drawable/up_notch_adobespark" />
<ImageButton
android:id="#+id/imageButton4"
android:layout_width="50dp"
android:layout_height="54dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.005"
tools:srcCompat="#drawable/more_button" />
<ImageButton
android:id="#+id/imageButton7"
android:layout_width="59dp"
android:layout_height="66dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.997"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.004"
app:srcCompat="#drawable/help_icon" />
<TextView
android:id="#+id/textView"
android:layout_width="165dp"
android:layout_height="36dp"
android:fontFamily="#font/baloo_tamma"
android:text="Hi Josh."
android:textSize="22dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.065"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.158" />
just like broot explained … XML syntax is similar to HTML it has an opening and closing tag, so you need to close every single tag you open in which your case is the constraint layout . just add this line to the end of your xml file
</androidx.constraintlayout.widget.ConstraintLayout>
another advice would be very useful is to avoid using horizontal and vertical bias, I believe that padding(s) and margins(s) are more than enough to help you design the layout you want
and try also using for width and height wrap_content or match parent for detailed and correct measurement for the most phones that will be used. because if you changed the amuleter you are using you will notice that the measurement will be diffrient so as a best practice is to use wrap_content or match parent
Error message is pretty self-explanatory. You opened ConstraintLayout tag at the beginning of the document, but you never closed it. You need to add the following at the end:
</androidx.constraintlayout.widget.ConstraintLayout>
enter image description hereI want to put the processbar under the id iv_logo, but the progressbar is located at the top center, how can I do that?
Additionally, I am using databinding. Please let me know if there is any problem here.
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
layout="#layout/activity_start"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ProgressBar
android:id="#+id/progress"
android:layout_width="60dp"
android:layout_height="60dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/tv_logo" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/iv_logo"
android:layout_width="wrap_content"
android:layout_height="80dp"
android:src="#drawable/Logo"
android:layout_marginTop="40dp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"/>
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/iv_alogo"
android:layout_width="62dp"
android:layout_height="30dp"
android:src="#drawable/logo_pnt"
android:layout_marginBottom="20dp"
android:layout_marginRight="20dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
It seems like you need to rethink your layout structure completely.
In addition, your iv_alogo has no vertical constraints, so it is not known exactly where it will be placed on the layout.
I offer you two options here:
Refuse include and place two AppCompatImageView in the main layout.
Place the progress bar inside the included layout.
In this case, it is not clear why you using include here.
your XML attribute is pointing on some View with tv_logo id
app:layout_constraintTop_toBottomOf="#+id/tv_logo"
but in second XML snippet (assuming part of #layout/activity_start) there is no View with such id... maybe try with one of these ids, which are placed in activity_start layout, so iv_logo or iv_alogo?
app:layout_constraintTop_toBottomOf="#+id/iv_logo"
//or
app:layout_constraintTop_toBottomOf="#+id/iv_alogo"
edit: due to posted image - it looks like you are looking for centering, not placing below another View. for centering use
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
I am creating my first app with android studio and this is my first problem:
I want to try the ConstraintLayout. I have built the layout with a ConstraintLayout with the Design Editor (clicking it together). When i try the layout in Android Emulator, all Buttons have moved in the left upper corner :(
Except the "Hello World" Label which was generated automatically when i created my first project.
The difference between the Label and the Button is, that some code lines beginning with app:layout_constraint.... are missing. You can see it in Code.
What am I doing wrong, or is it a bug?
I would be glad for an answer! :)
<?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="match_parent"
tools:context="com.example.u0017007.coffeecounter.MainActivity">
<TextView
android:layout_width="136dp"
android:layout_height="30dp"
android:text="Hello World!"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.234" />
<Button
android:id="#+id/buttonAddCoffee"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:freezesText="false"
android:text="#string/add_coffee"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="231dp" />
<Button
android:id="#+id/buttonRemoveCoffee"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/remove_coffee"
tools:layout_editor_absoluteX="236dp"
tools:layout_editor_absoluteY="231dp" />
</android.support.constraint.ConstraintLayout>
tools:layout_editor_absoluteX and tools:layout_editor_absoluteY are only used for preview, like all tools:XXXX.
You need to add constraints to your view. You can add in the XML or you can do it with the visual editor.
There is a very good website that explain all about ConstraintsLayout.
By the way, Android Studio warm you with a error This view is not constrained, it only has designtime positions, so it will jump to (0,0) unless you add constraints if you don't set constraints.
It seems from the above code that, you didn't added any constraints to buttons thats why they moved to left upper corner.
<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="match_parent">
<TextView
android:layout_width="136dp"
android:layout_height="30dp"
android:text="Hello World!"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.234" />
<Button
android:id="#+id/buttonAddCoffee"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:freezesText="false"
android:text="ADD coffee"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="276dp"
app:layout_constraintRight_toLeftOf="#+id/buttonRemoveCoffee"
android:layout_marginRight="82dp"
android:layout_marginLeft="24dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintHorizontal_bias="1.0" />
<Button
android:id="#+id/buttonRemoveCoffee"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="remove coffee"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="276dp"
android:layout_marginRight="24dp"
app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>
Please refer to bellow link -
https://www.youtube.com/watch?v=z53Ed0ddxgM
tools:layout_editor_absoluteX="236dp"
tools:layout_editor_absoluteY="231dp"
These are used by studio to render in Graphic editor only. During run time,
as constraints are not set, the views take default position(0,0).
Try setting some constraints on buttons and procedd
I'm trying to create a nested ConstraintLayout in Android.
The objective is to have an Image to the left, and another constraint layout to the right, inside a constraint layout, as the following image:
It correctly shows on the preview, but inside the application, it bugs and doesn't show at all
Layout File:
<?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:id="#+id/box_npcs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/npcImage"
android:layout_width="64dp"
android:layout_height="64dp"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="#+id/layoutInformation"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="#+id/layoutInformation"
app:srcCompat="#color/colorBlueishGreen" />
<android.support.constraint.ConstraintLayout
android:id="#+id/layoutInformation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="4dp"
android:maxWidth="250dp"
app:layout_constraintHorizontal_bias="0.021"
app:layout_constraintLeft_toRightOf="#+id/npcImage"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/top_priority"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:ellipsize="start"
android:text="DummyTextIsDummy"
android:textAppearance="#style/TextAppearance.AppCompat.Body1"
android:textColor="#color/common_google_signin_btn_text_light_default"
android:textSize="24sp"
android:textStyle="bold"
android:typeface="normal"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="HardcodedText" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
The layout is being added to another ConstraintLayout using the code
parent.addChild(inflater.inflate(R.layout.box_npc);
How should I fix this? And even, what is the issue?
The situation faced was that OP was trying to add the created ConstraintLayout to another ConstraintLayout programatically. That was being made using
inflater.inflate(R.layout.box, null)
It was an incorrect approach, as this ignores the layout parameters from the box. What was made to fix it was
inflater.inflate(R.layout.box, PARENT_LAYOUT/* One that box was being added to*/)
This fixes some issues due to the fact that the layout parameters were now being respected by the parent layout.
More information: Understaing Android's Layout Inflater.inflate()
For child views of each inner ConstraintLayout, use the id of parent layout instead of "parent".
For example instead of:
app:layout_constraintTop_toTopOf="parent"
Use
app:layout_constraintTop_toTopOf="#+id/parent_id"
I have a XML layout for a ViewHolder inside a RecyclerView.
This layout's root is a ConstraintLayout whose height is set to wrap_content.
Inside this flat hierarchy there are 3 textviews and an image view with a fixed height; think of:
<ConstraintLayout>
<TextView height=wrap>
<TextView height=wrap>
<TextView height=wrap>
<ImageView height=150dp>
</ConstraintLayout>
It's a relatively simple layout. In beta4 this is how it looks in the Designer (and eventually at runtime, each recyclerView cell):
Apologies for the "red tape" but it's NDA blah blah.
That being said, the elements are:
The 3 text views (red taped with a nice purple background)
The ImageView with 150dp height is the gray thing.
The Purple background was applied to the root ConstraintLayout. All nice.
Now this is how it looks, without a single modification with Beta 5:
As you can see the Purple (root) Constraint Layout is now "confused" and doesn't wrap content as it used to.
Things I tried:
Adding app:layout_constraintHeight_default="wrap" to the ConstraintLayout (and spread too). Didn't make a difference.
The ImageView has a app:layout_constraintBottom_toBottomOf="parent" constraint that I tried removing, didn't make a difference either.
Revert back to beta4 :)
For the record, this is the full layout (id's have been renamed for red-tape reasons and no tools:text or similar due to the same reasons). The layout is otherwise exactly the same.
<?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:background="#color/colorAccent">
<TextView
android:id="#+id/toplabel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text=""
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="#+id/top_bottom_label"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="#+id/top_right_label"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/top_right_label"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginTop="8dp"
android:ellipsize="end"
android:gravity="end"
android:maxLines="1"
android:text=""
app:layout_constraintBottom_toTopOf="#+id/top_bottom_label"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toRightOf="#+id/toplabel"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="packed" />
<TextView
android:id="#+id/top_bottom_label"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginTop="8dp"
android:ellipsize="end"
android:gravity="end"
android:maxLines="1"
android:text=""
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toRightOf="#+id/toplabel"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/top_right_label" />
<ImageView
android:id="#+id/imageview"
android:layout_width="0dp"
android:layout_height="150dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/top_bottom_label"
app:srcCompat="#android:color/darker_gray" />
</android.support.constraint.ConstraintLayout>
Am I supposed to do something different? (I know I can replace this with a RelativeLayout and probably do the same, but anyway… I believe in ConstraintLayout!) :)
I filed a bug about this and I got a workaround.
It's a regression and will be fixed (we hope) but… turns out my Chain is also incorrectly defined. My top_bottom_label does not have a bottom endpoint, and according to the documentation elements in a chain should be connected on both endpoints.
So I added app:layout_constraintBottom_toTopOf="#id/imageview" to the top_bottom_label and this seems to work for my case. I have, effectively added the imageView to the chain, even do I don't really care much for it. It works for now.
Update February 14th 2017: The ConstraintLayout team # Google fixed the issue in master. It will likely be fixed in a next release. (Thanks!).