expandableListview 不与导航视图中的其他菜单项一起滚动

维普尔·辛格

实际上，我在导航视图中实现可扩展 Listview 时遇到了问题，expandablelistview 工作得很好，但是当我尝试滚动它时，背景菜单项确实滚动但可扩展列表视图没有滚动，有人请查看代码并帮助我.

可扩展列表适配器.java

public class ExpandableListAdapter extends BaseExpandableListAdapter{

private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;

public ExpandableListAdapter(Context context, List<String> listDataHeader,
                         HashMap<String, List<String>> listChildData) {
    this._context = context;
    this._listDataHeader = listDataHeader;
    this._listDataChild = listChildData;
}

@Override
public Object getChild(int groupPosition, int childPosititon) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .get(childPosititon);
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
}

@Override
public View getChildView(int groupPosition, final int childPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) {

    final String childText = (String) getChild(groupPosition, childPosition);

    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_group_child, null);
    }

    TextView txtListChild = (TextView) convertView
            .findViewById(R.id.lblListItem);

    txtListChild.setText(childText);
    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .size();
}

@Override
public Object getGroup(int groupPosition) {
    return this._listDataHeader.get(groupPosition);
}

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

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

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {
    String headerTitle = (String) getGroup(groupPosition);
    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_group_header, null);
    }

    TextView lblListHeader = (TextView) convertView
            .findViewById(R.id.lblListHeader);
    lblListHeader.setTypeface(null, Typeface.BOLD);
    lblListHeader.setText(headerTitle);

    return convertView;
}

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

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}
  }

我的 mainActivity.java 类

public class MainActivity extends BaseAppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {

@BindView(R.id.txt_heading_name_ma)
TextView txt_heading_name_ma;

@BindView(R.id.img_heading_ma)
ImageView img_heading_ma;

@BindView(R.id.navigation_MA)
BottomNavigationView navigation_MA;

@BindView(R.id.drawer_layout)
DrawerLayout drawer;

private View header;
private TextView txt_heading_mail, txt_heading_name;
private ImageView imageView;
private ExpandableListView expListView;
ExpandableListAdapter listAdapter;
private MainActivity activity;
private ShortingProductResponse shortingProductResponse;
ArrayList<String> listDataHeader;
HashMap<String, List<String>> listDataChild;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Fabric.with(this, new Crashlytics());
    setContentView(R.layout.activity_main);
    ButterKnife.bind(this);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    enableExpandableList();



    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.addDrawerListener(toggle);
    toggle.syncState();



    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        toggle.getDrawerArrowDrawable().setColor(getColor(R.color.colorPrimary));
    } else {
        toggle.getDrawerArrowDrawable().setColor(getResources().getColor(R.color.colorPrimary));
    }

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);
    expListView=(ExpandableListView)navigationView.findViewById(R.id.navList);

    header = navigationView.getHeaderView(0);

    header.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            replaceFragment(FragmentNames.MyAccountFragment, false, null, false, false);
            navigationDrawClose();
        }
    });

    txt_heading_mail = header.findViewById(R.id.txt_heading_mail);
    txt_heading_name = header.findViewById(R.id.txt_heading_name);
    imageView = header.findViewById(R.id.imageView);

    replaceFragment(FragmentNames.MainFragment, false, null, true, true);
}



private void enableExpandableList() {
    listDataHeader = new ArrayList<String>();
    listDataChild = new HashMap<String, List<String>>();
    expListView = (ExpandableListView) findViewById(R.id.navList);

    prepareListData(listDataHeader, listDataChild);
    listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);

    expListView.setAdapter(listAdapter);

    expListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

        @Override
        public boolean onGroupClick(ExpandableListView parent, View v,
                                    int groupPosition, long id) {

            return false;
        }
    });
    // Listview Group expanded listener
    expListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {

        @Override
        public void onGroupExpand(int groupPosition) {
            Toast.makeText(getApplicationContext(),
                    listDataHeader.get(groupPosition) + " Expanded",
                    Toast.LENGTH_SHORT).show();
        }
    });


    expListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {

        @Override
        public void onGroupCollapse(int groupPosition) {
            Toast.makeText(getApplicationContext(),
                    listDataHeader.get(groupPosition) + " Collapsed",
                    Toast.LENGTH_SHORT).show();

        }
    });


    expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

        @Override
        public boolean onChildClick(ExpandableListView parent, View v,
                                    int groupPosition, int childPosition, long id) {

            Toast.makeText(
                    getApplicationContext(),
                    listDataHeader.get(groupPosition)
                            + " : "
                            + listDataChild.get(
                            listDataHeader.get(groupPosition)).get(
                            childPosition), Toast.LENGTH_SHORT)
                    .show();
            return false;
        }
    });

}

private void prepareListData(List<String> listDataHeader, Map<String,
            List<String>> listDataChild) {



    listDataHeader.add("Terms and Conditions");



    List<String> top = new ArrayList<String>();
    top.add("Privacy");
    top.add("Security");
    top.add("Terms");




    listDataChild.put(listDataHeader.get(0), top); 

}





private void navigationDrawClose() {
    if (drawer != null)
        drawer.closeDrawer(GravityCompat.START);
}

@Override
protected void onStart() {
    super.onStart();
    initializeView();
}

@Override
public void onBackPressed() {

    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

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

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    int id = item.getItemId();

    switch (item.getItemId()) {
        case R.id.nav_wishlist_main:
            if (isValidUser())
                startWishListActivity();
            Log.e(ApplicationContext.TAG, "Done");
            return true;
        case R.id.nav_cart_main:
            startCarfInfoActivity();

            Log.e(ApplicationContext.TAG, "Done");
            return true;
    }

    return super.onOptionsItemSelected(item);
}

private void startWishListActivity() {
    startActivity(new Intent(this, WishlistActivity.class));
}

private void startCarfInfoActivity() {
    startActivity(new Intent(this, CartInfoActivity.class));
}

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    switch (item.getItemId()) {
        case R.id.nav_home:
            replaceFragment(FragmentNames.MainFragment, true, null, true, true);
            break;
        case R.id.nav_shop_now:
            replaceFragment(FragmentNames.ShopNowFragment, true, null, false, false);
            break;
        case R.id.nav_brands:
            replaceFragment(FragmentNames.BrandsFragment, true, null, false, false);
            break;
        case R.id.nav_holidays:
            replaceFragment(FragmentNames.HolidaysFragment, true, null, false, false);
            break;
        case R.id.nav_search_products:
            replaceFragment(FragmentNames.MyAccountFragment, true, null, false, false);
            break;
        case R.id.nav_new_arrival:
            Log.e(ApplicationContext.TAG, "Done");
            break;
        case R.id.nav_wishlist:
            Log.e(ApplicationContext.TAG, "Done");
            break;
        case R.id.nav_cart:
            Log.e(ApplicationContext.TAG, "Done");
            break;
        case R.id.nav_my_orders:
            replaceFragment(FragmentNames.MyOrdersFragment, false, null, false, false);
            Log.e(ApplicationContext.TAG, "Done");
            break;
        case R.id.nav_abouts_us:
            Log.e(ApplicationContext.TAG, "Done");
            break;
        case R.id.nav_contacts_us:
            Log.e(ApplicationContext.TAG, "Done");
            break;
        case R.id.nav_testimonial:
            Log.e(ApplicationContext.TAG, "Done");
            break;
        case R.id.nav_logout:
            Logout();
            Log.e(ApplicationContext.TAG, "Done");
            break;
    }
    navigationDrawClose();
    return true;
}

private FirebaseAuth mAuth;
private GoogleSignInClient gAuth;

private void Logout() {
    PrefSetup.getInstance().clearPrefSetup();
    mAuth = FirebaseAuth.getInstance();
    mAuth.signOut();
    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestIdToken(getString(R.string.default_web_client_id)).requestEmail().build();
    gAuth = GoogleSignIn.getClient(this, gso);
    gAuth.signOut();
    startLoginActivity();
}

private void startLoginActivity() {
    startActivity(new Intent(this, LoginUserActivity.class));
    finish();
}

@Override
public void initializeView() {
    super.initializeView();
    navigation_MA.setOnNavigationItemSelectedListener(item -> {
        switch (item.getItemId()) {
            case R.id.bottom_nav_home:
                replaceFragment(FragmentNames.MainFragment, false, null, true, true);
                return true;
            case R.id.bottom_nav_shop_now:
                replaceFragment(FragmentNames.ShopNowFragment, false, null, false, false);
                return true;
            case R.id.bottom_nav_brands:
                replaceFragment(FragmentNames.BrandsFragment, false, null, false, false);
                return true;
            case R.id.bottom_nav_holidays:
                replaceFragment(FragmentNames.HolidaysFragment, false, null, false, false);
                return true;
            case R.id.bottom_nav_my_account:
                replaceFragment(FragmentNames.MyAccountFragment, false, null, false, false);
                return true;
        }
        return false;
    });

    setNavigationHeader();
}

private void setBottomNavigationItemSelected(int position) {
    switch (position) {
        case 0:
            navigation_MA.setSelectedItemId(R.id.bottom_nav_home);
            break;
        case 1:
            navigation_MA.setSelectedItemId(R.id.bottom_nav_shop_now);
            break;
        case 2:
            navigation_MA.setSelectedItemId(R.id.bottom_nav_brands);
            break;
        case 3:
            navigation_MA.setSelectedItemId(R.id.bottom_nav_holidays);
            break;
        case 4:
            navigation_MA.setSelectedItemId(R.id.bottom_nav_my_account);
            break;
    }
}

private BaseFragment fragment;

public void replaceFragment(FragmentNames fragmentName, boolean isBottomSelected, Bundle bundle, boolean isFirst, boolean clearBackStack) {
    Utilities.getInstance().hideKeyboard(this);
    FragmentManager fm = getSupportFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();
    if (clearBackStack) {
        fm.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }

    switch (fragmentName) {
        case MainFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof MainFragment)
                return;
            fragment = new MainFragment();
            if (isBottomSelected)
                setBottomNavigationItemSelected(0);
            break;
        case ShopNowFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof ShopNowFragment)
                return;
            fragment = new ShopNowFragment();
            if (isBottomSelected)
                setBottomNavigationItemSelected(1);
            break;
        case BrandsFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof BrandsFragment)
                return;
            fragment = new BrandsFragment();
            if (isBottomSelected)
                setBottomNavigationItemSelected(2);
            break;
        case HolidaysFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof HolidaysFragment)
                return;
            fragment = new HolidaysFragment();
            if (isBottomSelected)
                setBottomNavigationItemSelected(3);
            break;
        case MyAccountFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof MyAccountFragment)
                return;
            fragment = new MyAccountFragment();
            if (isBottomSelected)
                setBottomNavigationItemSelected(4);
            break;
        case ProductListFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof ProductListFragment)
                return;
            fragment = new ProductListFragment();
            break;
        case CartInfoFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof CartInfoFragment)
                return;
            fragment = new CartInfoFragment();
            break;
        case MyOrdersFragment:
            if (ApplicationContext.getInstance().getLiveFragment() != null && ApplicationContext.getInstance().getLiveFragment() instanceof MyOrdersFragment)
                return;
            fragment = new MyOrdersFragment();
            break;
    }
    // if user passes the @bundle in not null, then can be added to the fragment
    if (bundle != null) {
        try {
            fragment.setArguments(bundle);
        } catch (Exception e) {
            System.out.println(fragment.getArguments());  // print exception
        }
    }


    if (!isFirst) {
        ft.addToBackStack(fragment.getClass().getName() + "");
    } else {


    }

    fragment.fragmentType = fragmentName.getValue();

    ft.replace(R.id.rl_workSpace, fragment);
    ft.commit();

}

public void setNavigationHeader(String imagePath, String userName, String mailId) {
    if (imagePath.length() >= 1)
        ApplicationContext.getInstance().loadImage(imagePath, imageView, null, R.drawable.no_image);
    if (userName.length() >= 1)
        txt_heading_name.setText(userName);
    if (mailId.length() >= 1)
        txt_heading_mail.setText(mailId);

}

public void setNavigationHeader() {
    if (PrefSetup.getInstance().getUserInfo() == null || PrefSetup.getInstance().getUserInfo().getResponsedata() == null)
        return;
    try {
        LoginResponse.Responsedata userInfo = PrefSetup.getInstance().getUserInfo().getResponsedata();
        ApplicationContext.getInstance().loadImage(userInfo.getProfile_pic(), imageView, null, R.drawable.no_image);
        txt_heading_name.setText(userInfo.getFirst_name() + " " + userInfo.getLast_name());
        txt_heading_mail.setText(userInfo.getEmail());
    } catch (Exception e) {
        ApplicationContext.getInstance().catchException(e);
    }

}

public void setHeader(int image, String headingText) {
    if (image != 0) {
        img_heading_ma.setVisibility(View.VISIBLE);
        txt_heading_name_ma.setVisibility(View.GONE);
    } else {
        img_heading_ma.setVisibility(View.GONE);
        txt_heading_name_ma.setVisibility(View.VISIBLE);
        txt_heading_name_ma.setText(headingText);
    }
}

public boolean isValidUser() {
    if (PrefSetup.getInstance().getUserInfo() != null)
        return true;
    PopupUtils.getInstance().showTwoButtonDialogNoCancelable(this, getString(R.string.alert),
            getString(R.string.login_error), getString(R.string.cancel), getString(R.string.login), (object, position) -> {
                if (position == 1)
                    startLoginActivity();
            });
    return false;
}

  }

活动_main.xml

<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">

<include
    layout="@layout/app_bar_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer">


    <ExpandableListView
        android:id="@+id/navList"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="left|start"
        android:layout_marginTop="280dp"
        android:background="@color/colorPrimary"
        android:divider="@color/white"
        android:dividerHeight="0.7dp"
        android:indicatorRight="?android:attr/expandableListPreferredItemIndicatorRight" />


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

列表组头文件

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:orientation="vertical">

<TextView
    android:id="@+id/lblListHeader"
    android:layout_width="match_parent"
    android:layout_height="?attr/listPreferredItemHeightSmall"
    android:gravity="center_vertical"
    android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
    android:paddingRight="?attr/listPreferredItemPaddingRight"
    android:textColor="#1f2124"
    android:textSize="16sp" />

list_group_child.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="8dp">

<TextView
    android:id="@+id/lblListItem"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingLeft="?android:attr/expandableListPreferredChildPaddingLeft" />

维普尔·辛格

经过大量尝试，我开始意识到导航视图中的可扩展列表视图只有在您将导航视图的所有内容都放在可扩展列表视图中时才会起作用，因为如果您选择在导航视图中同时使用菜单和可扩展列表视图来填充项目那么 expamdablelistview 很可能不会连接到导航视图的标题，并且它不会与导航视图的其他项目一起滚动，并且它永远不会同步以完成格式。所以只需将所有菜单项添加到 expandablelistview 中，并让其他人像普通菜单项一样克隆它们

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编辑于 2021-07-1

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