Android-自定义Toolbar的方法

<.
    android :id= "@+id/toolbar"
    android :layout_width= "match_parent"
    android :layout_height= "?attr/actionBarSize"
    android :background= "@color/colorPrimary"
    android :elevation= "4dp"
    app :contentInsetLeft= "0dp"
    app :popupTheme= "@style/"
    app :contentInsetStart= "0dp"
    android :theme= "@style/"  >
    <TextView
        android :id= "@+id/toolbar_title"
        android :text= "@string/title_yun_note"
        android :layout_gravity= "center"
        android :textSize= "20sp"
        android :textColor= "@android:color/white"
        android :layout_width= "wrap_content"
        android :layout_height= "wrap_content"  />

    < ImageView
        android :src= "@drawable/navigation_refresh"
        android :id= "@+id/image_button_refresh"
        android :layout_gravity= "right"
        android :visibility= "invisible"
        android :layout_marginRight= "5dp"
        android :layout_width= "wrap_content"
        android :layout_height= "wrap_content"  />


</.>