Question

我正在尝试在导航抽屉菜单下实现SubMenu。将只有一个组菜单。请参阅下图，我想做什么。目前我只添加了xml菜单列表中的主菜单。如何将ExpandableListView作为SubMenu添加到菜单中以获得以下类型的接口。

这里我用来打开/关闭导航抽屉的代码和抽屉菜单上的启动活动点击

navigationView = (NavigationView) findViewById(R.id.navigation_view);
drawerLayout = (DrawerLayout) findViewById(R.id.drawer);

//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {

            // This method will trigger on item Click of navigation menu
            @Override
            public boolean onNavigationItemSelected(MenuItem item) {

                Intent intent;
                int id = item.getItemId();

                //Check to see which item was being clicked and perform appropriate action
                if (id == R.id.favorites) {
                    Intent favoritesIntent = new Intent(MainActivity.this, Favorites.class);
                    startActivity(favoritesIntent);
                } else if (id == R.id.settings) {
                    Intent settingsIntent = new Intent(MainActivity.this, Settings.class);
                    startActivity(settingsIntent);
                }

                drawerLayout.closeDrawer(GravityCompat.START);
                return true;

            }
        });

        // Initializing Drawer Layout and ActionBarToggle
        ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.openDrawer, R.string.closeDrawer){

            @Override
            public void onDrawerClosed(View drawerView) {
                // Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
                super.onDrawerClosed(drawerView);
            }

            @Override
            public void onDrawerOpened(View drawerView) {
                // Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank

                super.onDrawerOpened(drawerView);
            }
        };

        actionBarDrawerToggle.setDrawerIndicatorEnabled(false);
        ImageView titleLogo = (ImageView) findViewById(R.id.titleLogo);
        titleLogo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                drawerLayout.openDrawer(GravityCompat.START);

            }


      });
    .....

        @Override
            public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.menu_main, menu);
            return true;
        }

这是我使用的XML

<android.support.design.widget.NavigationView
        android:id="@+id/navigation_view"
        android:layout_height="match_parent"
        android:layout_width="wrap_content"
        android:layout_gravity="start"
        app:itemTextColor="@color/white"
        app:itemIconTint="@color/white"
        app:headerLayout="@layout/header"
        app:menu="@menu/drawer"
        android:background="@color/colorPrimary" >

    </android.support.design.widget.NavigationView>

这是菜单列表

的drawer.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <group android:checkableBehavior="single">

        <item
            android:id="@+id/favorites"
            android:checked="false"
            android:icon="@drawable/favorites"
            android:title="@string/favorites" />

        <item
            android:id="@+id/services"
            android:checked="false"
            android:icon="@drawable/services"
            android:title="@string/services" />

        <item
            android:id="@+id/settings"
            android:checked="false"
            android:icon="@drawable/settings"
            android:title="@string/settings" />

    </group>
</menu>

Answer 1

如果您想要对NavigationDrawer实现上述行为，可以按照以下步骤操作：

1）您必须将Expandable listview添加到NavigationView。

2）创建标题视图

3）创建子视图。

4）扩展BaseExpandableListAdapter

5）在MainActivity中设置适配器

可用的解决方案很少。您可以关注this教程或this。有关创建导航抽屉的基本知识，您可以转到here。我得到了这些教程的帮助，它们很容易应用。

希望这有帮助。

Answer 2

从此处下载源代码（Navigation drawer with expandablelistview in android）

<强> MainActivity.java

package com.deepshikha.navigationdrawer;

import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ArrayList<Model_country> al_main = new ArrayList<>();
    ExpandableListView ev_list;
    CountryAdapter obj_adapter;
    String TAG = "MainActivity";
    private DrawerLayout mDrawerLayout;
    HomeFragment fragment;
    TextView tv_name;
    RelativeLayout rl_menu;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        fn_data();
        init();

    }

    private void init() {

        getSupportActionBar().hide();
        ev_list = (ExpandableListView) findViewById(R.id.ev_menu);
        tv_name = (TextView) findViewById(R.id.tv_name);
        rl_menu = (RelativeLayout) findViewById(R.id.rl_menu);
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        obj_adapter = new CountryAdapter(MainActivity.this, al_main);
        ev_list.setAdapter(obj_adapter);
        ev_list.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

            @Override
            public boolean onGroupClick(ExpandableListView parent, View v,
                                        int groupPosition, long id) {
                setListViewHeight(parent, groupPosition);
                return false;
            }
        });

        setExpandableListViewHeightBasedOnChildren(ev_list);

        fragment = new HomeFragment();
        Bundle bundle = new Bundle();
        bundle.putString("name", al_main.get(0).getStr_country());
        bundle.putString("des", al_main.get(0).getAl_state().get(0).getStr_description());
        bundle.putString("dish", al_main.get(0).getAl_state().get(0).getStr_name());
        bundle.putString("image", al_main.get(0).getAl_state().get(0).getStr_image());
        tv_name.setText(al_main.get(0).getStr_country());

        fragment.setArguments(bundle);
        getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, fragment, "HomeFragment").addToBackStack("null").commit();


        rl_menu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mDrawerLayout.openDrawer(Gravity.LEFT);
            }
        });
    }

    private void setListViewHeight(ExpandableListView listView, int group) {
        ExpandableListAdapter listAdapter = (ExpandableListAdapter) listView.getExpandableListAdapter();
        int totalHeight = 0;
        int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(),
                View.MeasureSpec.EXACTLY);
        for (int i = 0; i < listAdapter.getGroupCount(); i++) {
            View groupItem = listAdapter.getGroupView(i, false, null, listView);
            groupItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);

            totalHeight += groupItem.getMeasuredHeight();

            if (((listView.isGroupExpanded(i)) && (i != group))
                    || ((!listView.isGroupExpanded(i)) && (i == group))) {
                for (int j = 0; j < listAdapter.getChildrenCount(i); j++) {
                    View listItem = listAdapter.getChildView(i, j, false, null,
                            listView);
                    listItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);

                    totalHeight += listItem.getMeasuredHeight();

                }
            }
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        int height = totalHeight
                + (listView.getDividerHeight() * (listAdapter.getGroupCount() - 1));
       /* if (height < 10)
            height = 200;*/
        params.height = height;
        listView.setLayoutParams(params);
        listView.requestLayout();

    }

    private void fn_data() {

        String str_data = loadJSONFromAsset();

        try {
            JSONObject jsonObject_country = new JSONObject(str_data);
            JSONArray jsonArray_country = jsonObject_country.getJSONArray("country");
            al_main = new ArrayList<>();
            for (int i = 0; i < jsonArray_country.length(); i++) {
                Model_country obj_country = new Model_country();
                JSONObject jsonObject = jsonArray_country.getJSONObject(i);
                JSONArray jsonArray_dishes = jsonObject.getJSONArray("dishes");
                ArrayList<Model_Dish> al_dishes = new ArrayList<>();
                for (int j = 0; j < jsonArray_dishes.length(); j++) {

                    JSONObject jsonObject_dishes = jsonArray_dishes.getJSONObject(j);
                    Model_Dish obj_dish = new Model_Dish();
                    obj_dish.setStr_name(jsonObject_dishes.getString("dishname"));
                    obj_dish.setStr_description(jsonObject_dishes.getString("description"));
                    obj_dish.setStr_image(jsonObject_dishes.getString("image"));
                    al_dishes.add(obj_dish);
                }

                obj_country.setAl_state(al_dishes);
                obj_country.setStr_country(jsonObject.getString("name"));

                al_main.add(obj_country);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

    }

    public static void setExpandableListViewHeightBasedOnChildren(ExpandableListView expandableListView) {
        CountryAdapter adapter = (CountryAdapter) expandableListView.getExpandableListAdapter();
        if (adapter == null) {
            return;
        }
        int totalHeight = expandableListView.getPaddingTop() + expandableListView.getPaddingBottom();
        for (int i = 0; i < adapter.getGroupCount(); i++) {
            View groupItem = adapter.getGroupView(i, false, null, expandableListView);
            groupItem.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
            totalHeight += groupItem.getMeasuredHeight();

            if (expandableListView.isGroupExpanded(i)) {
                for (int j = 0; j < adapter.getChildrenCount(i); j++) {
                    View listItem = adapter.getChildView(i, j, false, null, expandableListView);
                    listItem.setLayoutParams(new ViewGroup.LayoutParams(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED));
                    listItem.measure(View.MeasureSpec.makeMeasureSpec(0,
                            View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
                            .makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
                    totalHeight += listItem.getMeasuredHeight();

                }
            }
        }

        ViewGroup.LayoutParams params = expandableListView.getLayoutParams();
        int height = totalHeight + expandableListView.getDividerHeight() * (adapter.getGroupCount() - 1);

        if (height < 10)
            height = 100;
        params.height = height;
        expandableListView.setLayoutParams(params);
        expandableListView.requestLayout();
    }

    public String loadJSONFromAsset() {
        String json = null;
        try {

            InputStream is = getAssets().open("dishes.json");

            int size = is.available();

            byte[] buffer = new byte[size];

            is.read(buffer);

            is.close();

            json = new String(buffer, "UTF-8");


        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        }

        Log.e(TAG, "Json response " + json);
        return json;

    }

    public void fn_selectedPosition(int group, int child) {

        fragment = new HomeFragment();
        Bundle bundle = new Bundle();
        bundle.putString("name", al_main.get(group).getStr_country());
        bundle.putString("des", al_main.get(group).getAl_state().get(child).getStr_description());
        bundle.putString("dish", al_main.get(group).getAl_state().get(child).getStr_name());
        bundle.putString("image", al_main.get(group).getAl_state().get(child).getStr_image());
        fragment.setArguments(bundle);

        getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, fragment, "HomeFragment").addToBackStack("null").commit();
        mDrawerLayout.closeDrawer(Gravity.LEFT);

        tv_name.setText(al_main.get(group).getStr_country());
    }

    @Override
    public void onBackPressed() {
        super.onBackPressed();
        finish();
    }
}

<强> CountryAdapter.java

package com.deepshikha.navigationdrawer;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by deepshikha on 12/7/17.
 */

public class CountryAdapter extends BaseExpandableListAdapter {
    Context context;
    ArrayList<Model_country> al_country;

    public CountryAdapter(Context context, ArrayList<Model_country> al_country) {
        this.context = context;
        this.al_country = al_country;
    }

    @Override
    public int getGroupCount() {
        return al_country.size();
    }

    @Override
    public int getChildrenCount(int i) {
        return al_country.get(i).getAl_state().size();
    }

    @Override
    public Object getGroup(int i) {
        return al_country.get(i);
    }

    @Override
    public Object getChild(int i, int i1) {
        return al_country.get(i).getAl_state().get(i1);
    }

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

    @Override
    public long getChildId(int i, int i1) {
        return i1;
    }

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

    @Override
    public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) {
        if (view==null){

            LayoutInflater layoutInflater = (LayoutInflater) this.context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = layoutInflater.inflate(R.layout.adapter_header, null);
        }
        TextView tv_state = (TextView)view.findViewById(R.id.tv_name);
        tv_state.setText(al_country.get(i).getStr_country());
        return view;
    }

    @Override
    public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) {
        if (view==null){

            LayoutInflater layoutInflater = (LayoutInflater) this.context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = layoutInflater.inflate(R.layout.adapter_childview, null);
        }

        TextView tv_state = (TextView)view.findViewById(R.id.tv_name);

        tv_state.setText(al_country.get(i).getAl_state().get(i1).getStr_name());
        tv_state.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ((MainActivity)context).fn_selectedPosition(i,i1);
            }
        });
        return view;
    }

    @Override
    public boolean isChildSelectable(int i, int i1) {
        return false;
    }


}

谢谢！

Android导航抽屉ExpandableListView

2 个答案: