createProgressView

CreateProgressView.java

public static View createProgressView(Activity activity) {
    ViewGroup viewGroup = (ViewGroup) activity.findViewById(android.R.id.content);
    View progressView = LayoutInflater.from(activity).inflate(R.layout.view_progress_bar, viewGroup, false);
    viewGroup.addView(progressView);
    return progressView;
}

view_progress_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true">
    <ProgressBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"/>
</FrameLayout>