Android ProgressBar

By default, the ProgressBar is a circular rotation.

<ProgressBar
    android:id="@+id/progressBar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

NOTE: Android Show Busy/Loading and Prevent Touch (using DialogFragment) - Kotlin.

For horizontal loading animation, set

android:indeterminate="true"
style="?android:attr/progressBarStyleHorizontal" or style="@style/Widget.AppCompat.ProgressBar.Horizontal"

<ProgressBar
    android:id="@+id/progressBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:indeterminate="true"
    style="?android:attr/progressBarStyleHorizontal"
    />

For real horizontal progress bar

<ProgressBar
    android:id="@+id/progressBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:max="100"
    android:progress="50"
    style="?android:attr/progressBarStyleHorizontal"
    />

repeat(10) {    progressBar.progress = ((it+1)/10.0 * progressBar.max).toInt()}