NavigationDrawer在多個活動和樣式行中

Question

我想爲所有活動添加一個NavigationDrawer。我不滿意我在stackoverflow和其他論壇上找到的許多解決方案。然後我發現這個MaterialDrawer library這看起來很容易。但知道我想爲抽屜中的所有物品實現自己的樣式。我該怎麼用這個庫來做到這一點？

Answer 1

MaterialDrawer建立在靈活性的基礎上。它需要對接口進行分配的對象。所以你可以通過實現IDrawerItem界面輕鬆添加自己的元素。已經有一些默認DrawerItems，如PrimaryDrawerItem，您可以依賴（只是擴展它），或者您可以使用完整的自定義方法。

爲了讓事情變得更容易，MaterialDrawer附帶了AbstractDrawerItem，它已經實現了大多數項目所需的默認行爲。

您可以查看示例應用程序here中添加的自定義DrawerItems。

一個完整的定製產品的IconDrawerItem

public class IconDrawerItem extends AbstractDrawerItem<IconDrawerItem, IconDrawerItem.ViewHolder> { 
    protected ImageHolder icon; 
    protected ImageHolder selectedIcon; 

    protected boolean iconTinted = false; 

    protected ColorHolder iconColor; 
    protected ColorHolder selectedIconColor; 
    protected ColorHolder disabledIconColor; 

    //GETTER & SETTER REMOVED TO KEEP THE SNIPPET SMALL 

    @Override 
    public int getType() { 
     return R.id.material_drawer_item_icon_only; 
    } 

    @Override 
    @LayoutRes 
    public int getLayoutRes() { 
     return R.layout.material_drawer_item_icon_only; 
    } 

    @Override 
    public void bindView(ViewHolder viewHolder) { 
     Context ctx = viewHolder.itemView.getContext(); 

     //set the identifier from the drawerItem here. It can be used to run tests 
     viewHolder.itemView.setId(hashCode()); 

     //get the correct color for the icon 
     int iconColor; 
     if (this.isEnabled()) { 
      iconColor = ColorHolder.color(getIconColor(), ctx, R.attr.material_drawer_primary_icon, R.color.material_drawer_primary_icon); 
     } else { 
      iconColor = ColorHolder.color(getDisabledIconColor(), ctx, R.attr.material_drawer_hint_icon, R.color.material_drawer_hint_icon); 
     } 
     int selectedIconColor = ColorHolder.color(getSelectedIconColor(), ctx, R.attr.material_drawer_selected_text, R.color.material_drawer_selected_text); 

     //get the drawables for our icon and set it 
     Drawable icon = ImageHolder.decideIcon(getIcon(), ctx, iconColor, isIconTinted(), 1); 
     Drawable selectedIcon = ImageHolder.decideIcon(getSelectedIcon(), ctx, selectedIconColor, isIconTinted(), 1); 
     ImageHolder.applyMultiIconTo(icon, iconColor, selectedIcon, selectedIconColor, isIconTinted(), viewHolder.icon); 

     //call the onPostBindView method to trigger post bind view actions (like the listener to modify the item if required) 
     onPostBindView(this, viewHolder.itemView); 
    } 

    @Override 
    public ViewHolderFactory getFactory() { 
     return new ItemFactory(); 
    } 

    public static class ItemFactory implements ViewHolderFactory<ViewHolder> { 
     public ViewHolder create(View v) { 
      return new ViewHolder(v); 
     } 
    } 

    protected static class ViewHolder extends RecyclerView.ViewHolder { 
     private View view; 
     protected ImageView icon; 

     private ViewHolder(View view) { 
      super(view); 
      this.view = view; 
      this.icon = (ImageView) view.findViewById(R.id.material_drawer_icon); 
     } 
    } 
} 

沒有限制。您只需將類型定義爲標識符，使用的佈局，然後實現將被調用以將數據設置爲所有視圖的bindView()。