I'm working on an Android activity in which I want to have a header, and the content below the header. I want to have background image that is streched just on the content, but not on the header.
From the picture you can see that my image is streched also on the logo part of the screen, which I don't want.
Here is the xml of my current layout:
<?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"
android:background="#drawable/background_11"
tools:context=".login.LoginActivity"
>
<ImageView
android:id="#+id/logo"
android:layout_width="381dp"
android:layout_height="156dp"
android:src="#drawable/logo"
tools:ignore="ContentDescription"
app:layout_constraintTop_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginTop="-480dp"
android:layout_marginRight="10dp"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
android:layout_marginEnd="10dp"
app:layout_constraintHorizontal_bias="0.47" />
<ImageView
android:id="#+id/emptyImage"
android:layout_width="384dp"
android:layout_height="445dp"
android:layout_marginBottom="0dp"
android:layout_marginRight="0dp"
android:layout_marginTop="0dp"
android:background="#color/TICK_BACKGROUND"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/logo"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="#drawable/empty" />
<EditText
android:id="#+id/login_usernameTextField"
android:layout_width="291dp"
android:layout_height="63dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="80dp"
android:background="#drawable/rounded_text_edit_shape"
android:ems="10"
android:hint="Username"
android:inputType="textPersonName"
android:textColor="#color/INPUT_TEXT_COLOR"
android:textColorHint="#color/iron"
android:textCursorDrawable="#null"
app:layout_constraintHorizontal_bias="0.506"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/logo"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp" />
<EditText
android:id="#+id/login_passwordTextField"
android:layout_width="291dp"
android:layout_height="63dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="-38dp"
android:background="#drawable/rounded_text_edit_shape"
android:ems="10"
android:hint="Password"
android:textCursorDrawable="#null"
android:inputType="textPassword"
android:textColor="#color/INPUT_TEXT_COLOR"
android:textColorHint="#color/iron"
app:layout_constraintHorizontal_bias="0.506"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/login_usernameTextField"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp" />
<Button
android:id="#+id/login_loginButton"
android:onClick="loginButtonClick"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="30dp"
android:background="#drawable/rounded_button_shape"
android:text="Log In"
android:textColor="#color/white"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/login_passwordTextField"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="8dp"
app:layout_constraintVertical_bias="0.28"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp" />
</android.support.constraint.ConstraintLayout>
I thought about making a parent Layout and inside that Layout add a header and another layout that contains the content. And then set the background inside the content layout like like this: android:background="#drawable/background_11"
Here is the code I tried:
<?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">
<ImageView
android:id="#+id/logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
app:srcCompat="#drawable/logo_2"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="-1dp"
android:layout_marginLeft="0dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintHorizontal_bias="0.0" />
<android.support.constraint.ConstraintLayout
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#drawable/background_11"
app:layout_constraintTop_toBottomOf="#id/logo"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent">
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
However, my background is not showing up. Here are the reuslts:
You can use a ConstraintLayout in an other ConstraintLayout but you need to respect some rules. All direct childs of a ConstraintLayout should have constraint on left,top, right and bottom.
I think that without the constraint left and right of your inner ConstraintLayout, he have a width and height equals to 0dp , he is not displayed.
Have you try to add constraint left and rigth to your inner ConstraintLayout ?
<?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">
<ImageView
android:id="#+id/logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
app:srcCompat="#drawable/logo_2"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="-1dp"
android:layout_marginLeft="0dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintHorizontal_bias="0.0" />
<android.support.constraint.ConstraintLayout
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#drawable/background_11"
app:layout_constraintTop_toBottomOf="#id/logo"
android:layout_marginLeft="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent">
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
Hope this helps.
I made it work by making a constraint layout inside the Linear Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="#+id/imageView5"
android:layout_width="wrap_content"
android:layout_height="146dp"
app:srcCompat="#drawable/netset_logo_2" />
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#drawable/background_11">
</android.support.constraint.ConstraintLayout>
</LinearLayout>
Still I don't understand why doesn't my first solution work. Why can't you add a constraint layout inside the constraint layout?
There is no problem adding a constraint layout inside of another constraint layout if you satisfy all constraints.
This would work:
<android.support.constraint.ConstraintLayout
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#drawable/background_11"
android:layout_marginLeft="8dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/logo"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent">
</android.support.constraint.ConstraintLayout>
But also:
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#drawable/background_11"
android:layout_marginLeft="8dp"
app:layout_constraintTop_toBottomOf="#id/logo"
app:layout_constraintBottom_toBottomOf="parent">
</android.support.constraint.ConstraintLayout>
If it is the right approach using a ConstraintLayout for the purpose of setting a background image is another question.
Since you are only using the ConstraintLayout to use the background property, you can skip that layout completely and use a View directly.
Since all views inherit from View, but just add a lot of logic on top of it, in this use case a View is enough to satisfy the needs.
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#drawable/background_11"
android:layout_marginLeft="8dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/logo"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent">
</View>
Well naturally, you made the constraint layout take the entire screen, and the Logo take a smaller subset of it.
so you have the logo on your screen, and beneath it the background.
you might want to set the "background" on a different sub layout inside the main constraint layout.
something like this
<constraintlayout
width:match_parent
height:match_parent>
<logo here/>
<constraintlayout
background_here>
<constraintlayout/>
<constraintlayout/>
hope it makes sense.
Related
I want my textView to be center align to screen and also don't want it to overlap the image. Can you please help me achieve this using constraint.
<android.support.constraint.ConstraintLayout
android:id="#+id/merge"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/iv_close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/paa_action_bar_back_margin"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/vc_nav_bar_back" />
<TextView
android:id="#+id/tv_actionbar_page_title"
style="#style/db_title_4.semibold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#{title}"
android:textColor="#color/shade_grease"
android:textSize="16sp"
android:visibility="#{TextUtils.isEmpty(title) ? View.GONE : View.VISIBLE}"
app:layout_constraintBottom_toBottomOf="#+id/iv_close"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/iv_close"
tools:text="#tools:sample/lorem"
tools:visibility="visible" />
</android.support.constraint.ConstraintLayout>
You need to set margins, as for marginTop, marginBottom, marginLeft, marginRight.
For example:
<TextView
android:id="#+id/tv_actionbar_page_title"
style="#style/db_title_4.semibold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#{title}"
android:textColor="#color/shade_grease"
android:textSize="16sp"
android:visibility="#{TextUtils.isEmpty(title) ? View.GONE : View.VISIBLE}"
app:layout_constraintBottom_toBottomOf="#+id/iv_close"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/iv_close"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
tools:text="#tools:sample/lorem"
tools:visibility="visible" />
You can configure the different margin values and make it fit your requirements. Or you can even remove some margins. In the end, it depends on you and your design.
Edit: As a reminder constraint layout works in a relative kind of manner. One object depends on the other, so make sure that your lines/guidelines are correct (in the .xml labeled as constraint_toStartOf, etc.)
This should work. Text will never overlap with the Image and Image will be aligned to the start.
<android.support.constraint.ConstraintLayout android:id="#+id/merge"
android:layout_width="match_parent"
android:layout_height="match_parent"
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">
<ImageView
android:id="#+id/iv_close"
android:layout_width="0dp"
app:layout_constraintWidth_default="wrap"
android:layout_height="wrap_content"
android:layout_margin="#dimen/paa_action_bar_back_margin"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#id/tv_actionbar_page_title"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/vc_nav_bar_back" />
<TextView
android:id="#+id/tv_actionbar_page_title"
style="#style/db_title_4.semibold"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#{title}"
android:textColor="#color/shade_grease"
android:textSize="16sp"
android:visibility="#{TextUtils.isEmpty(title) ? View.GONE : View.VISIBLE}"
app:layout_constraintBottom_toBottomOf="#+id/iv_close"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#id/iv_close"
app:layout_constraintTop_toTopOf="#+id/iv_close"
tools:text="#tools:sample/lorem"
tools:visibility="visible" />
</android.support.constraint.ConstraintLayout>
Try to constrain your text view to your image and give it android:layout_width="0dp" so it will only expand according to the space available.
Because his new width is not wrap_content your text view will not overlap the image and that's why he will only expand according to his constraints.
So you need to do something like this:
<?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="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<ImageView
android:id="#+id/iv_close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher_background"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/tv_actionbar_page_title"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:gravity="center"
android:text="some very long txtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasda"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="#+id/iv_close"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/iv_close"
app:layout_constraintTop_toTopOf="#+id/iv_close" />
</android.support.constraint.ConstraintLayout>
If you want your text view to be exactly the same height as the image view add android:layout_height="0dp", now when you will have a long text it will get scrollable and will not expand vertically.
It will look like this:
Edit according to comment:
You can use your layout like this:
<?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">
<TextView
android:id="#+id/tv_actionbar_page_title"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:gravity="center"
android:text="some very long txtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasda"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/iv_close"
app:layout_constraintVertical_bias="0.0" />
<ImageView
android:id="#+id/iv_close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher_background"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
In order to get this look:
Or you can use this layout:
<?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">
<TextView
android:id="#+id/tv_actionbar_page_title"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:gravity="center"
android:text="some very long txtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasdatxtsadasdasdasdasdasda"
android:textSize="16sp"
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="0.0" />
<ImageView
android:id="#+id/iv_close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher_background"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
In order to get this look:
As you may know if one tag come after another tag in xml the last one can overlap the first one.
as you can see in this example:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button ONE"
android:textSize="70sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Button TWO"
android:textSize="70sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
but this rule wouldn't apply if the first view have elevation (however I just tested it by TabLayout).
here is example of not overlapping first view because of elevation attribute:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.TabLayout
android:layout_width="0dp"
android:layout_height="100dp"
android:background="#09A536"
android:elevation="1dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.499" />
<ImageView
android:id="#+id/imageView"
android:layout_width="453dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="#D0021B"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</android.support.constraint.ConstraintLayout>
However I don't now what is the reason behind this.
You can find the answer in Material Design docs:
Elevation is the relative distance between two surfaces along the z-axis.
So when you are thinking about that you should imagine a 3D space like that:
When you are applying elevation you are basically pushing one View up over another, or elevating it.
I cannot achieve this one.
I want viewB to follow the start of viewA.
Then I want to create a constraint to have a space from the start of viewA to its parent.
.
Code I tried:
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView
android:id="#+id/descriptionTxt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="32dp"
android:layout_marginStart="8dp"
android:text="Txt1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/descriptionTxt2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Txt2"
app:layout_constraintEnd_toEndOf="#+id/descriptionTxt"
app:layout_constraintStart_toStartOf="#+id/descriptionTxt"
app:layout_constraintTop_toBottomOf="#+id/descriptionTxt" />
</android.support.constraint.ConstraintLayout>
The code above will show in Preview that only viewA will have a margin from the left. viewB does not follow the left of viewA.
Im using com.android.support.constraint:constraint-layout:1.0.2
Do not use match_parent. Instead, start using "0dp" for match_parent and define left/right or top/bottom parent constraints
Here is working code:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_margin="10dp"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="#+id/descriptionTxt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="32dp"
android:layout_marginStart="8dp"
android:text="Txt1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/descriptionTxt2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Txt2"
app:layout_constraintEnd_toEndOf="#+id/descriptionTxt"
app:layout_constraintStart_toStartOf="#+id/descriptionTxt"
app:layout_constraintTop_toBottomOf="#+id/descriptionTxt" />
</android.support.constraint.ConstraintLayout>
Also , it is good to use Guidelines to have uniform left/top/right/bottom margin.
try this :
<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">
<TextView
android:id="#+id/descriptionTxt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Txt1"
android:layout_marginTop="20dp"
android:layout_marginLeft="20dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:id="#+id/descriptionTxt2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Txt2"
android:layout_marginTop="8dp"
app:layout_constraintRight_toRightOf="#+id/descriptionTxt"
app:layout_constraintLeft_toLeftOf="#+id/descriptionTxt"
app:layout_constraintTop_toBottomOf="#+id/descriptionTxt"
/>
</android.support.constraint.ConstraintLayout>
I use the follow code to display buttons and ViewPager. I want to display ViewPager above of buttons but that it have wrap_content height and width.
<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/linearLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/transparent_hd_image_scrim">
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<LinearLayout
android:id="#+id/buttons_bottom_layout"
android:layout_width="0dp"
android:layout_height="#dimen/hd_preview_buttons_height"
android:layout_marginEnd="#dimen/basic_keyline"
android:layout_marginRight="#dimen/basic_keyline"
android:orientation="horizontal"
android:layout_marginBottom="16dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#id/view_pager"
app:layout_constraintBottom_toBottomOf="parent">
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:visibility="invisible" />
<View
android:id="#+id/stubBottom"
android:layout_width="#dimen/basic_keyline"
android:layout_height="wrap_content" />
<Button
android:id="#+id/send_button"
style="#style/HDPreviewButtonStyle"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#color/colorAccent"
android:text="#string/send"
android:textAllCaps="true" />
</LinearLayout>
What I see on preview.
But on practice on emulator I get this screen.
What I do incorrect?
From the XML code you posted there are several issues that ConstraintLayout might have problem with.
Also ConstraintLayout can help you with nesting layout, which you also mentioned in comments you want to avoid.
I am not sure you want the view pager to behave as wrap rather than match it's constraints.
I created what I think is what you want using what ConstraintLayout has to offer to ease pain of previous layouts.
<android.support.constraint.ConstraintLayout android:id="#+id/linearLayout"
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="#color/transparent_hd_image_scrim">
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="#+id/barrier"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/send_button"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/view_pager" />
<Button
android:id="#+id/send_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="8dp"
android:background="#color/colorAccent"
android:textAllCaps="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="#+id/button"
app:layout_constraintTop_toBottomOf="#+id/view_pager"
tools:text="Send" />
<android.support.constraint.Barrier
android:id="#+id/barrier"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:barrierDirection="top"
app:constraint_referenced_ids="send_button, button"
app:layout_constraintBottom_toBottomOf="parent" />
</android.support.constraint.ConstraintLayout>
Bottom buttons are chained horizontally together - this is basically replacement of the previous LinearLayout and the weight usage.
Also added barrier for height of the bottom buttons - this will make sure the height of the view pager will always accomodate to the height of any of them.
If you will actually want to the view pager to have wrap content add these
app:layout_constraintWidth_max="wrap"
app:layout_constraintHeight_max="wrap"
I'm trying to put a Button at the top of the screen and under it an ImageView which need to fill the screen (all screen sizes).
In RelativeLayout it's seems to be easy to do, but in the ConstraintLayout I don't succeed to get it done.
Here is an example of what it's look like in RelativeLayout:
and the XML Code:
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Download Image"
android:id="#+id/button"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:onClick="downloadImage" />
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/imageView"
android:layout_below="#+id/button"
android:layout_alignParentStart="true" />
Thanks for your help,
Shay.
Maybe I've not understod your question completely but this is what I did to recreate the image you gave as example:
<?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">
<Button
android:id="#+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:text="Button"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/imageView27"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.59"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/button2"
app:srcCompat="#drawable/common_google_signin_btn_icon_dark" />
</android.support.constraint.ConstraintLayout>
and the result:
Actually fill_parent property is deprecated. so use 0dp to fill available space of the ConstraintLayout
For your question use following code to show Button at the top of the screen and under it an ImageView which will definitely fill the screen (for all screen sizes).
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="#+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:onClick="downloadImage"
android:text="Download Image"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/imageView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/button" />
</android.support.constraint.ConstraintLayout>
Note: If you want to add margin/padding then apply to the layout or any view as per your requirement. but when you are adding any margin to the view inside to the ConstraintLayout, that view need to have Constraint for that particulate side.
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Download Image"
android:id="#+id/button"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:onClick="downloadImage"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/imageView"
android:layout_below="#+id/button"
android:layout_alignParentStart="true"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/button"
app:layout_constraintBottom_toBottomOf="parent"/>
Button needs to have left, right and top constraints with parent.
And ImageView needs to have left, right , bottom constraints with parent and top constraint with button's bottom.