How to best place my obscured ProgressBar on a ConstraintLayout on the screen?

Question

I have a progress bar that shows up when I click on the Login button. I made modifications to the layout by adding a Toolbar at the top and it seems this toolbar is now obscuring the progressbar.

How can I make this progress bar visible somewhere in the center of the screen?

Thank you very much for your help.

The layout xml code is as shown below:

activity_login.xml

<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:layout_gravity="center_horizontal"
android:layout_marginTop="16dp"
android:gravity="center"
android:orientation="vertical">

<android.support.v7.widget.Toolbar
    android:id="@+id/my_toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:layout_marginBottom="64dp"
    android:background="@android:color/white"
    android:elevation="4dp"
    android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
    app:layout_constraintBottom_toTopOf="@+id/edittext_username"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

<EditText
    android:id="@+id/edittext_username"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="24dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:drawablePadding="8dp"
    android:gravity="center_vertical"
    android:hint="@string/edittext_username"
    app:layout_constraintBottom_toTopOf="@+id/edittext_password"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="@+id/button_login" />

<EditText
    android:id="@+id/edittext_password"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="24dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:drawablePadding="8dp"
    android:gravity="center_vertical"
    android:hint="@string/edittext_password"
    android:inputType="textPassword"
    app:layout_constraintBottom_toTopOf="@+id/button_login"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="parent" />

<Button
    android:id="@+id/button_login"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:text="@string/button_login"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="parent" />

<ProgressBar
    android:id="@+id/progressbar_login_progress"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:visibility="gone" />

</android.support.constraint.ConstraintLayout>

Possible duplicate of [How to center the elements in ConstraintLayout](https://stackoverflow.com/questions/43143468/how-to-center-the-elements-in-constraintlayout) — user3875913, Feb 17 '18 at 16:25
@user3875913, it is not an exact duplicate as the answer in your suggested question addresses using a guidline to center. My main question is about making my progress bar visible and placing it in the best location on the screen. Thank you very much. — sage, Feb 17 '18 at 17:58

score 23 · Accepted Answer · answered Feb 17 '18 at 16:17

Use next code to center your ProgressBar

<?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"
    >

    <ProgressBar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/progressBar"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

Worked like a charm, had to add android:elevation="10dp" to bring the progress to the top. — Alex Nolasco, May 19 '19 at 17:25

score 0 · Answer 2 · answered Feb 17 '18 at 16:19

0

You don't have any constraints on your ProgressBar. If you want it below your toolbar you have to add a constraint for it to do so.

<ProgressBar
    android:id="@+id/progressbar_login_progress"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    app:layout_constraintTop_toBottomOf="@id/my_toolbar"
    android:visibility="gone" />

answered Feb 17 '18 at 16:19

Jack

8,851
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Thanks a lot @jack. This was a possible answer and worked but H D's solution seemed better due to the conventional center positions given to progress bars when they are visible. – sage Feb 17 '18 at 18:02

score 0 · Answer 3 · answered Feb 18 '18 at 08:53

Next code, it should be wordk for ProgressBar in ConstraintLayout

<ProgressBar
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/progressBar"
    android:gravity="center"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

How to best place my obscured ProgressBar on a ConstraintLayout on the screen?

3 Answers3

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