java.lang.IllegalArgumentException: View=DecorView@5fd145b[MainActivity] not attached to window manager code example

Example: java.lang.IllegalArgumentException: View=DecorView@5fd145b[MainActivity] not attached to window manager

@Override
public void onPause() {
    super.onPause();

    if ((mDialog != null) && mDialog.isShowing())
        mDialog.dismiss();
    mDialog = null;
}