public class

ListMenuPresenter

extends java.lang.Object

implements MenuPresenter

 java.lang.Object

↳androidx.appcompat.view.menu.ListMenuPresenter

Gradle dependencies

compile group: 'androidx.appcompat', name: 'appcompat', version: '1.6.0-alpha04'

  • groupId: androidx.appcompat
  • artifactId: appcompat
  • version: 1.6.0-alpha04

Artifact androidx.appcompat:appcompat:1.6.0-alpha04 it located at Google repository (https://maven.google.com/)

Androidx artifact mapping:

androidx.appcompat:appcompat com.android.support:appcompat-v7

Androidx class mapping:

androidx.appcompat.view.menu.ListMenuPresenter android.support.v7.view.menu.ListMenuPresenter

Overview

MenuPresenter for list-style menus.

Summary

Fields
public static final java.lang.StringVIEWS_TAG

Constructors
publicListMenuPresenter(Context context, int itemLayoutRes)

Construct a new ListMenuPresenter.

Methods
public booleancollapseItemActionView(MenuBuilder menu, MenuItemImpl item)

public booleanexpandItemActionView(MenuBuilder menu, MenuItemImpl item)

public booleanflagActionItems()

public ListAdaptergetAdapter()

Call this instead of getMenuView if you want to manage your own ListView.

public intgetId()

public MenuViewgetMenuView(ViewGroup root)

public voidinitForMenu(Context context, MenuBuilder menu)

public voidonCloseMenu(MenuBuilder menu, boolean allMenusAreClosing)

public voidonItemClick(<any> parent, View view, int position, long id)

public voidonRestoreInstanceState(Parcelable state)

public ParcelableonSaveInstanceState()

public booleanonSubMenuSelected(SubMenuBuilder subMenu)

public voidrestoreHierarchyState(Bundle inState)

public voidsaveHierarchyState(Bundle outState)

public voidsetCallback(MenuPresenter.Callback cb)

public voidsetId(int id)

public voidsetItemIndexOffset(int offset)

public voidupdateMenuView(boolean cleared)

from java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Fields

public static final java.lang.String VIEWS_TAG

Constructors

public ListMenuPresenter(Context context, int itemLayoutRes)

Construct a new ListMenuPresenter.

Parameters:

context: Context to use for theming. This will supersede the context provided to initForMenu when this presenter is added.
itemLayoutRes: Layout resource for individual item views.

Methods

public void initForMenu(Context context, MenuBuilder menu)

public MenuView getMenuView(ViewGroup root)

public ListAdapter getAdapter()

Call this instead of getMenuView if you want to manage your own ListView. For proper operation, the ListView hosting this adapter should add this presenter as an OnItemClickListener.

Returns:

A ListAdapter containing the items in the menu.

public void updateMenuView(boolean cleared)

public void setCallback(MenuPresenter.Callback cb)

public boolean onSubMenuSelected(SubMenuBuilder subMenu)

public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing)

public void setItemIndexOffset(int offset)

public void onItemClick(<any> parent, View view, int position, long id)

public boolean flagActionItems()

public boolean expandItemActionView(MenuBuilder menu, MenuItemImpl item)

public boolean collapseItemActionView(MenuBuilder menu, MenuItemImpl item)

public void saveHierarchyState(Bundle outState)

public void restoreHierarchyState(Bundle inState)

public void setId(int id)

public int getId()

public Parcelable onSaveInstanceState()

public void onRestoreInstanceState(Parcelable state)

Source

/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.appcompat.view.menu;

import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP_PREFIX;

import android.content.Context;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.SparseArray;
import android.view.ContextThemeWrapper;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListAdapter;

import androidx.annotation.RestrictTo;
import androidx.appcompat.R;

import java.util.ArrayList;

/**
 * MenuPresenter for list-style menus.
 *
 * @hide
 */
@RestrictTo(LIBRARY_GROUP_PREFIX)
public class ListMenuPresenter implements MenuPresenter, AdapterView.OnItemClickListener {
    private static final String TAG = "ListMenuPresenter";

    Context mContext;
    LayoutInflater mInflater;
    MenuBuilder mMenu;

    ExpandedMenuView mMenuView;

    int mItemIndexOffset;
    int mThemeRes;
    int mItemLayoutRes;

    private Callback mCallback;
    MenuAdapter mAdapter;

    private int mId;

    public static final String VIEWS_TAG = "android:menu:list";

    /**
     * Construct a new ListMenuPresenter.
     * @param context Context to use for theming. This will supersede the context provided
     *                to initForMenu when this presenter is added.
     * @param itemLayoutRes Layout resource for individual item views.
     */
    public ListMenuPresenter(Context context, int itemLayoutRes) {
        this(itemLayoutRes, 0);
        mContext = context;
        mInflater = LayoutInflater.from(mContext);
    }

    /**
     * Construct a new ListMenuPresenter.
     * @param itemLayoutRes Layout resource for individual item views.
     * @param themeRes Resource ID of a theme to use for views.
     */
    public ListMenuPresenter(int itemLayoutRes, int themeRes) {
        mItemLayoutRes = itemLayoutRes;
        mThemeRes = themeRes;
    }

    @Override
    public void initForMenu(Context context, MenuBuilder menu) {
        if (mThemeRes != 0) {
            mContext = new ContextThemeWrapper(context, mThemeRes);
            mInflater = LayoutInflater.from(mContext);
        } else if (mContext != null) {
            mContext = context;
            if (mInflater == null) {
                mInflater = LayoutInflater.from(mContext);
            }
        }
        mMenu = menu;
        if (mAdapter != null) {
            mAdapter.notifyDataSetChanged();
        }
    }

    @Override
    public MenuView getMenuView(ViewGroup root) {
        if (mMenuView == null) {
            mMenuView = (ExpandedMenuView) mInflater.inflate(
                    R.layout.abc_expanded_menu_layout, root, false);
            if (mAdapter == null) {
                mAdapter = new MenuAdapter();
            }
            mMenuView.setAdapter(mAdapter);
            mMenuView.setOnItemClickListener(this);
        }
        return mMenuView;
    }

    /**
     * Call this instead of getMenuView if you want to manage your own ListView.
     * For proper operation, the ListView hosting this adapter should add
     * this presenter as an OnItemClickListener.
     *
     * @return A ListAdapter containing the items in the menu.
     */
    public ListAdapter getAdapter() {
        if (mAdapter == null) {
            mAdapter = new MenuAdapter();
        }
        return mAdapter;
    }

    @Override
    public void updateMenuView(boolean cleared) {
        if (mAdapter != null) mAdapter.notifyDataSetChanged();
    }

    @Override
    public void setCallback(Callback cb) {
        mCallback = cb;
    }

    @Override
    public boolean onSubMenuSelected(SubMenuBuilder subMenu) {
        if (!subMenu.hasVisibleItems()) return false;

        // The window manager will give us a token.
        new MenuDialogHelper(subMenu).show(null);
        if (mCallback != null) {
            mCallback.onOpenSubMenu(subMenu);
        }
        return true;
    }

    @Override
    public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) {
        if (mCallback != null) {
            mCallback.onCloseMenu(menu, allMenusAreClosing);
        }
    }

    int getItemIndexOffset() {
        return mItemIndexOffset;
    }

    public void setItemIndexOffset(int offset) {
        mItemIndexOffset = offset;
        if (mMenuView != null) {
            updateMenuView(false);
        }
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        mMenu.performItemAction(mAdapter.getItem(position), this, 0);
    }

    @Override
    public boolean flagActionItems() {
        return false;
    }

    @Override
    public boolean expandItemActionView(MenuBuilder menu, MenuItemImpl item) {
        return false;
    }

    @Override
    public boolean collapseItemActionView(MenuBuilder menu, MenuItemImpl item) {
        return false;
    }

    public void saveHierarchyState(Bundle outState) {
        SparseArray<Parcelable> viewStates = new SparseArray<Parcelable>();
        if (mMenuView != null) {
            ((View) mMenuView).saveHierarchyState(viewStates);
        }
        outState.putSparseParcelableArray(VIEWS_TAG, viewStates);
    }

    @SuppressWarnings("deprecation")
    public void restoreHierarchyState(Bundle inState) {
        SparseArray<Parcelable> viewStates = inState.getSparseParcelableArray(VIEWS_TAG);
        if (viewStates != null) {
            ((View) mMenuView).restoreHierarchyState(viewStates);
        }
    }

    public void setId(int id) {
        mId = id;
    }

    @Override
    public int getId() {
        return mId;
    }

    @Override
    public Parcelable onSaveInstanceState() {
        if (mMenuView == null) {
            return null;
        }

        Bundle state = new Bundle();
        saveHierarchyState(state);
        return state;
    }

    @Override
    public void onRestoreInstanceState(Parcelable state) {
        restoreHierarchyState((Bundle) state);
    }

    private class MenuAdapter extends BaseAdapter {
        private int mExpandedIndex = -1;

        public MenuAdapter() {
            findExpandedIndex();
        }

        @Override
        public int getCount() {
            ArrayList<MenuItemImpl> items = mMenu.getNonActionItems();
            int count = items.size() - mItemIndexOffset;
            if (mExpandedIndex < 0) {
                return count;
            }
            return count - 1;
        }

        @Override
        public MenuItemImpl getItem(int position) {
            ArrayList<MenuItemImpl> items = mMenu.getNonActionItems();
            position += mItemIndexOffset;
            if (mExpandedIndex >= 0 && position >= mExpandedIndex) {
                position++;
            }
            return items.get(position);
        }

        @Override
        public long getItemId(int position) {
            // Since a menu item's ID is optional, we'll use the position as an
            // ID for the item in the AdapterView
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = mInflater.inflate(mItemLayoutRes, parent, false);
            }

            MenuView.ItemView itemView = (MenuView.ItemView) convertView;
            itemView.initialize(getItem(position), 0);
            return convertView;
        }

        void findExpandedIndex() {
            final MenuItemImpl expandedItem = mMenu.getExpandedItem();
            if (expandedItem != null) {
                final ArrayList<MenuItemImpl> items = mMenu.getNonActionItems();
                final int count = items.size();
                for (int i = 0; i < count; i++) {
                    final MenuItemImpl item = items.get(i);
                    if (item == expandedItem) {
                        mExpandedIndex = i;
                        return;
                    }
                }
            }
            mExpandedIndex = -1;
        }

        @Override
        public void notifyDataSetChanged() {
            findExpandedIndex();
            super.notifyDataSetChanged();
        }
    }
}