如何在服务中的导航栏中设置颜色

Question

我想在导航栏中设置颜色，但它没有覆盖。甚至我设置了FLAG_LAYOUT_IN_SCREEN。如何在整个屏幕中设置透明布局。 Plz帮帮我？ **这是我的代码：**

View mView = new View(this);
mView.setBackgroundColor(shared.getColor());

    // get the WindowManager for the context-specific Display
    WindowManager wm = (WindowManager) getApplicationContext().getSystemService(WINDOW_SERVICE);

    // create the LayoutParams for the new Window
    WindowManager.LayoutParams params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.MATCH_PARENT,//width
            WindowManager.LayoutParams.FILL_PARENT,//height
            WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,//xpos // TYPE_SYSTEM_ALERT is denied in apiLevel >=19
            WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,// flags
            PixelFormat.TRANSLUCENT //formats // the pixel format, here: translucent
    );
    wm.addView(mView, params);