ConstraintLayout view size responsive

I'm trying to make a layout using a ConstraintLayout as parent which has three buttons like in the image below.

The xml layout file looks like this:

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">

<Button
    android:id="@+id/splash_facebook_btn"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_margin="15dp"/>

<Button
    android:id="@+id/splash_sign_in_btn"
    android:layout_width="180dp"
    android:layout_height="45dp"
    android:layout_marginStart="16dp"
    android:layout_marginTop="12dp"
    app:layout_constraintHorizontal_weight="1"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@id/splash_facebook_btn" />

<Button
    android:id="@+id/splash_sign_up_btn"
    android:layout_width="180dp"
    android:layout_height="45dp"
    android:layout_marginEnd="15dp"
    app:layout_constraintBottom_toBottomOf="@id/splash_sign_in_btn"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.995"
    app:layout_constraintHorizontal_weight="1"
    app:layout_constraintStart_toEndOf="@id/splash_sign_in_btn"
    app:layout_constraintTop_toTopOf="@id/splash_sign_in_btn"
    app:layout_constraintVertical_bias="0.0" />

I want to do this without setting fixed values for the two buttons on bottom.

I know I can achieve this by changing to LinearLayout and using layout_weight but I want to do this while having a ConstraintLayout as parent.

Is there a way to do this?

Upvotes: 0

Answers (3)

Daniel Turcan

Reputation: 199

Remove the fixed values, add constraints to those buttons: left and right and set their width to 0dp. here's the image here's the result:

<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">

<Button
    android:id="@+id/splash_facebook_btn"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_margin="15dp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    tools:text="continua cu cancer frate" />

<Button
    android:id="@+id/splash_sign_in_btn"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginTop="12dp"
    android:layout_marginEnd="16dp"
    app:layout_constraintEnd_toStartOf="@id/splash_sign_up_btn"
    app:layout_constraintStart_toStartOf="@id/splash_facebook_btn"
    app:layout_constraintTop_toBottomOf="@id/splash_facebook_btn"
    tools:text="intra aici frate" />

<Button
    android:id="@+id/splash_sign_up_btn"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="16dp"
    android:layout_marginTop="12dp"
    app:layout_constraintEnd_toEndOf="@id/splash_facebook_btn"
    app:layout_constraintStart_toEndOf="@id/splash_sign_in_btn"
    app:layout_constraintTop_toBottomOf="@id/splash_facebook_btn"
    tools:text="Creeaza cont frate" />

PS: I added tools:text so that there'll be some text in the Android Studio preview. PSS: Good luck frate

Upvotes: 1

Frank D.

Reputation: 26

Use a Guideline like:

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">

<Button
    android:id="@+id/splash_facebook_btn"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_margin="15dp"/>

<Button
    android:id="@+id/splash_sign_in_btn"
    android:layout_width="0dp"
    android:layout_height="45dp"
    android:layout_marginStart="16dp"
    android:layout_marginEnd="15dp"
    android:layout_marginTop="12dp"
    app:layout_constraintHorizontal_weight="1"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toStartOf="@id/guideline_vertical"
    app:layout_constraintTop_toBottomOf="@id/splash_facebook_btn" />

<androidx.constraintlayout.widget.Guideline
    android:id="@+id/guideline_vertical"
    android:layout_width="1dp"
    android:layout_height="match_parent"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.5"/>

<Button
    android:id="@+id/splash_sign_up_btn"
    android:layout_height="0dp"
    android:layout_width="0dp"
    android:layout_marginEnd="15dp"
    android:layout_marginStart="15dp"
    app:layout_constraintBottom_toBottomOf="@id/splash_sign_in_btn"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@id/guideline_vertical"
    app:layout_constraintTop_toTopOf="@id/splash_sign_in_btn"
    app:layout_constraintVertical_bias="0.0"/>

</androidx.constraintlayout.widget.ConstraintLayout>

Upvotes: 1

SkypeDogg

Reputation: 1040

For left button set android:layout_marginEnd="8dp" for right android:layout_marginStart="8dp" and then programatically set their width:

public int getScreenWidth() {
    WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    Display display = wm.getDefaultDisplay();
    Point size = new Point();
    display.getSize(size);    
    return size.x/2;
}

This way you'll get screen width/2 and then you can set the buttons width with this value.

If you prefer XML only, try 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">


    <Button
        android:id="@+id/splash_facebook_btn"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_margin="15dp"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:orientation="horizontal"
        android:weightSum="2"
        android:layout_marginTop="8dp"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        app:layout_constraintTop_toBottomOf="@+id/splash_facebook_btn"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        >

        <Button
            android:id="@+id/splash_sign_in_btn"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginEnd="8dp"
            android:layout_weight="1" />

        <Button
            android:id="@+id/splash_sign_up_btn"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginStart="8dp"
            android:layout_weight="1" />

    </LinearLayout>

</android.support.constraint.ConstraintLayout>

Upvotes: 1

ConstraintLayout view size responsive

Answers (3)

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