chaining in constraint layout

readme.txt

To chain these seven CardViews in a ConstraintLayout with equal distance between them, you can use chains and guidelines. Here's how you can do it:

1. First, define horizontal guidelines to create equal spacing between the CardViews. Add these lines to your ConstraintLayout:

```xml
<androidx.constraintlayout.widget.Guideline
    android:id="@+id/guideline_start"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.1" />

<androidx.constraintlayout.widget.Guideline
    android:id="@+id/guideline_end"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.9" />
```

These guidelines define the start and end points of the horizontal space within which you want to evenly distribute the CardViews. Adjust the `app:layout_constraintGuide_percent` values if you want to change the spacing.

2. Next, update your CardViews' constraints to use these guidelines and create a horizontal chain. Remove any absolute positioning attributes (`tools:layout_editor_absoluteX` and `tools:layout_editor_absoluteY`) from the CardViews.

Here's how the updated CardViews should look:

```xml
<androidx.cardview.widget.CardView
    android:id="@+id/cardOne"
    android:layout_width="30dp"
    android:layout_height="30dp"
    app:layout_constraintStart_toStartOf="@+id/guideline_start"
    app:layout_constraintEnd_toStartOf="@+id/cardTwo"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />

<androidx.cardview.widget.CardView
    android:id="@+id/cardTwo"
    android:layout_width="30dp"
    android:layout_height="30dp"
    app:layout_constraintStart_toEndOf="@+id/cardOne"
    app:layout_constraintEnd_toStartOf="@+id/cardThree"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />

<androidx.cardview.widget.CardView
    android:id="@+id/cardThree"
    android:layout_width="30dp"
    android:layout_height="30dp"
    app:layout_constraintStart_toEndOf="@+id/cardTwo"
    app:layout_constraintEnd_toStartOf="@+id/cardFour"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />

<androidx.cardview.widget.CardView
    android:id="@+id/cardFour"
    android:layout_width="30dp"
    android:layout_height="30dp"
    app:layout_constraintStart_toEndOf="@+id/cardThree"
    app:layout_constraintEnd_toStartOf="@+id/cardFive"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />

<androidx.cardview.widget.CardView
    android:id="@+id/cardFive"
    android:layout_width="30dp"
    android:layout_height="30dp"
    app:layout_constraintStart_toEndOf="@+id/cardFour"
    app:layout_constraintEnd_toStartOf="@+id/cardSix"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />

<androidx.cardview.widget.CardView
    android:id="@+id/cardSix"
    android:layout_width="30dp"
    android:layout_height="30dp"
    app:layout_constraintStart_toEndOf="@+id/cardFive"
    app:layout_constraintEnd_toStartOf="@+id/cardSeven"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />

<androidx.cardview.widget.CardView
    android:id="@+id/cardSeven"
    android:layout_width="30dp"
    android:layout_height="30dp"
    app:layout_constraintStart_toEndOf="@+id/cardSix"
    app:layout_constraintEnd_toStartOf="@+id/guideline_end"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent" />
```

With these changes, the CardViews will form a horizontal chain, and the guidelines will help create equal spacing between them. You can adjust the spacing by changing the `app:layout_constraintGuide_percent` values in the guidelines as needed.

task_tracking_adapter.xml

 <androidx.cardview.widget.CardView
                android:id="@+id/cardcalendar"
                android:layout_width="0dp"
                android:layout_height="0dp"
                android:layout_marginTop="8dp"
                android:layout_marginBottom="8dp"
                app:layout_constraintBottom_toTopOf="@+id/btnDelete"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/cardDay" >

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <androidx.cardview.widget.CardView
                        android:id="@+id/cardSeven"
                        android:layout_width="30dp"
                        android:layout_height="30dp"
                        app:layout_constraintStart_toEndOf="@+id/cardSix"
                        app:layout_constraintEnd_toStartOf="@+id/guideline_end"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintTop_toTopOf="parent" />

                    <androidx.cardview.widget.CardView
                        android:id="@+id/cardSix"
                        android:layout_width="30dp"
                        android:layout_height="30dp"
                        app:layout_constraintStart_toEndOf="@+id/cardFive"
                        app:layout_constraintEnd_toStartOf="@+id/cardSeven"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintBottom_toBottomOf="parent"/>

                    <androidx.cardview.widget.CardView
                        android:id="@+id/cardFive"
                        android:layout_width="30dp"
                        android:layout_height="30dp"
                        app:layout_constraintStart_toEndOf="@+id/cardFour"
                        app:layout_constraintEnd_toStartOf="@+id/cardSix"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintBottom_toBottomOf="parent"/>

                    <androidx.cardview.widget.CardView
                        android:id="@+id/cardFour"
                        android:layout_width="30dp"
                        android:layout_height="30dp"
                        app:layout_constraintStart_toEndOf="@+id/cardThree"
                        app:layout_constraintEnd_toStartOf="@+id/cardFive"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintBottom_toBottomOf="parent"/>

                    <androidx.cardview.widget.CardView
                        android:id="@+id/cardTwo"
                        android:layout_width="30dp"
                        android:layout_height="30dp"
                        app:layout_constraintStart_toEndOf="@+id/cardOne"
                        app:layout_constraintEnd_toStartOf="@+id/cardThree"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintBottom_toBottomOf="parent">
                    </androidx.cardview.widget.CardView>

                    <androidx.cardview.widget.CardView
                        android:id="@+id/cardOne"
                        android:layout_width="30dp"
                        android:layout_height="30dp"
                        android:layout_marginStart="16dp"
                        app:layout_constraintStart_toStartOf="@+id/guideline_start"
                        app:layout_constraintEnd_toStartOf="@+id/cardTwo"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintBottom_toBottomOf="parent"/>

                    <androidx.cardview.widget.CardView
                        android:id="@+id/cardThree"
                        android:layout_width="30dp"
                        android:layout_height="30dp"
                        app:layout_constraintStart_toEndOf="@+id/cardTwo"
                        app:layout_constraintEnd_toStartOf="@+id/cardFour"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintBottom_toBottomOf="parent"/>

                    <androidx.constraintlayout.widget.Guideline
                        android:id="@+id/guideline_start"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="8dp"
                        android:orientation="vertical"
                        app:layout_constraintGuide_percent="0.01" />

                    <androidx.constraintlayout.widget.Guideline
                        android:id="@+id/guideline_end"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="8dp"
                        android:orientation="vertical"
                        app:layout_constraintGuide_percent="0.99" />
                </androidx.constraintlayout.widget.ConstraintLayout>
            </androidx.cardview.widget.CardView>