When is indeterminate progressbar coming to Android Support Library

Material Components Library

You can use the LinearProgressIndicator with the android:indeterminate="true" attribute:

<com.google.android.material.progressindicator.LinearProgressIndicator
    android:indeterminate="true"
    app:indicatorColor="?attr/colorPrimary"/>

You can also use different colors using:

<com.google.android.material.progressindicator.LinearProgressIndicator
        android:indeterminate="true"
        app:indicatorColor="@array/progress_colors"
        app:growMode="outgoing"/>

with:

  <integer-array name="progress_colors">
    <item>@color/...</item>
    <item>@color/....</item>
    <item>@color/....</item>
  </integer-array>

You can also use the CircularProgressIndicator component to have a circular progress indicator:

<com.google.android.material.progressindicator.CircularProgressIndicator
    android:indeterminate="true"
    app:indicatorColor="?attr/colorPrimary"/>

Note: It requires at least the version 1.3.0-alpha04

---

AppCompat

You can use a ProgressBar with an AppCompat style.

Just add this in your layout:

<ProgressBar
        style="@style/Base.Widget.AppCompat.ProgressBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:indeterminate="true"
        android:visibility="visible" />

If you would like an Horizontal progress bar use:

  <ProgressBar
        style="@style/Base.Widget.AppCompat.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="8dp"
        android:layout_marginTop="24dp"
        android:indeterminate="true"
        android:visibility="visible" />

They follow the official material guidelines.

This is an answer to an old question, but I figured fellow readers might be interested in this solution:

Newer versions (26.1.+) of the Support Library contain a class called CircularProgressDrawable that implements the exact look of the native Material indeterminate drawable. In order to easily use this in a layout, you can build a MaterialProgressBar like this:

public class MaterialProgressBar extends ProgressBar{
    // Same dimensions as medium-sized native Material progress bar
    private static final int RADIUS_DP = 16;
    private static final int WIDTH_DP = 4;

    public MaterialProgressView(Context context, AttributeSet attrs) {
        super(context, attrs);

        // The version range is more or less arbitrary - you might want to modify it
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP
                || Build.VERSION.SDK_INT > Build.VERSION_CODES.O_MR1) {

            final DisplayMetrics metrics = getResources().getDisplayMetrics();
            final float screenDensity = metrics.density;

            CircularProgressDrawable drawable = new CircularProgressDrawable(context);
            drawable.setColorSchemeColors(getResources().getColor(R.color.colorPrimary));
            drawable.setCenterRadius(RADIUS_DP * screenDensity);
            drawable.setStrokeWidth(WIDTH_DP * screenDensity);
            setIndeterminateDrawable(drawable);
        }
    }
}