animated blinking loader
<app.m4ntis.blinkingloader.BlinkingLoader
android:id="@+id/dotLoading1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:auto_start="true"
app:dot_blinkingColor="@color/colorAccent"
app:dot_margin="3dp"
app:dot_neutralColor="@color/colorAccent_light"
app:dot_num_dots="5"/>