java - 如何将自定义布局设置为菜单项？

Question

在我的应用程序中，我想使用带有icon 的popUp 菜单，我写了下面的代码。
但我想将我的自定义布局设置为menu items，但不显示任何项目。
我的意思是，不显示菜单标题和图标!

我的 Java 代码:

public void onMoreMenu(View view) {
    showPopupWindow(view);
}

void showPopupWindow(View view) {
    PopupMenu popup = new PopupMenu(AuctionDetailPage.this, view);
    try {
        Field[] fields = popup.getClass().getDeclaredFields();
        for (Field field : fields) {
            if ("mPopup".equals(field.getName())) {
                field.setAccessible(true);
                Object menuPopupHelper = field.get(popup);
                Class<?> classPopupHelper = Class.forName(menuPopupHelper.getClass().getName());
                Method setForceIcons = classPopupHelper.getMethod("setForceShowIcon", boolean.class);
                setForceIcons.invoke(menuPopupHelper, true);
                break;
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    popup.getMenuInflater().inflate(R.menu.detail_menu, popup.getMenu());
    popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {

        public boolean onMenuItemClick(MenuItem item) {
            Toast.makeText(getApplicationContext(), "You Clicked : " + item.getTitle(),  Toast.LENGTH_SHORT).show();
            return true;
        }
    });
    popup.show();
}

菜单代码:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <group android:checkableBehavior="none">

        <item
            android:id="@+id/nav_2"
            android:title=""
            app:actionLayout="@layout/item_test"
            app:showAsAction="always" />

    </group>

</menu>

自定义布局代码:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp">

    <ImageView
        android:id="@+id/itemNav_img"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_centerVertical="true"
        android:tint="#876"
        android:layout_toRightOf="@+id/itemNav_txt"
        android:src="@drawable/about" />

    <TextView
        android:id="@+id/itemNav_txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:textColor="#876"
        android:text="Test" />

</RelativeLayout>

如何修复它并将我的自定义布局设置为菜单项？

任何帮助将不胜感激。谢谢。

Answer 1

好的，这可以通过以下步骤使用 ListPopupWindow(根据文档)完成:

第一步:创建模型类

public class Item {
    private String title;
    private int imageRes;

    public Item(String title, int imageRes) {
        this.title = title;
        this.imageRes = imageRes;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getImageRes() {
        return imageRes;
    }

    public void setImageRes(int imageRes) {
        this.imageRes = imageRes;
    }
}

第二步:创建适配器

public class ListPopupWindowAdapter extends BaseAdapter {
    LayoutInflater mLayoutInflater;
    List<Item> mItemList;

    public ListPopupWindowAdapter(Context context, List<Item> itemList) {
        mLayoutInflater = LayoutInflater.from(context);
        mItemList = itemList;
    }

    @Override
    public int getCount() {
        return mItemList.size();
    }

    @Override
    public Item getItem(int i) {
        return mItemList.get(i);
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = mLayoutInflater.inflate(R.layout.detail_menu, null);
            holder = new ViewHolder(convertView);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.tvTitle.setText(getItem(position).getTitle());
        holder.ivImage.setImageResource(getItem(position).getImageRes());

        return convertView;
    }

    static class ViewHolder {
        TextView tvTitle;
        ImageView ivImage;

        ViewHolder(View view) {
            tvTitle = view.findViewById(R.id.text);
            ivImage = view.findViewById(R.id.image);
        }
    }
}

第三步:你的项目.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="50dp">

<ImageView
    android:id="@+id/itemNav_img"
    android:layout_width="30dp"
    android:layout_height="30dp"
    android:layout_centerVertical="true"
    android:tint="#876"
    android:layout_toRightOf="@+id/itemNav_txt"
    android:src="@drawable/about" />

<TextView
    android:id="@+id/itemNav_txt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:textColor="#876"
    android:text="Test" />

</RelativeLayout>

最后，显示ListPopupWindow

private void showListPopupWindow(View anchor) {
    final ListPopupWindow popupWindow = new ListPopupWindow(this);

    List<Item> itemList = new ArrayList<>();
    itemList.add(new Item("A", R.mipmap.ic_launcher));
    itemList.add(new Item("B", R.mipmap.ic_launcher));
    itemList.add(new Item("C", R.mipmap.ic_launcher));

    ListAdapter adapter = new ListPopupWindowAdapter(this, itemList);
    popupWindow.setAnchorView(anchor);
    popupWindow.setAdapter(adapter);
    popupWindow.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            popupWindow.dismiss();
        }
    });
    popupWindow.show();
}

就是这样，试试吧，然后告诉我。