我想在服务中添加mediaroutebutton，我的服务布局中有exoplayer，已授予绘制覆盖权限，覆盖exoplayer控制视图，当我在exoplayer控件视图中添加mediaroutebutton时，发生布局膨胀异常
原因：
java.lang.IllegalArgumentException: background can not be translucent: #0
at android.support.v4.graphics.ColorUtils.calculateContrast(ColorUtils.java:161)
at android.support.v7.app.MediaRouterThemeHelper.getControllerColor(MediaRouterThemeHelper.java:164)
at android.support.v7.app.MediaRouterThemeHelper.getRouterThemeId(MediaRouterThemeHelper.java:257)
at android.support.v7.app.MediaRouterThemeHelper.createThemedButtonContext(MediaRouterThemeHelper.java:94)
at android.support.v7.app.MediaRouteButton.<init>(MediaRouteButton.java:125)
at android.support.v7.app.MediaRouteButton.<init>(MediaRouteButton.java:121)
mediaroutebutton背景是透明的