实际上，在导航视图中实现可扩展Listview时，我遇到了一个问题，expandablelistview可以正常工作，但是当我尝试滚动时，背景菜单项的确滚动了，但可扩展listview却没有，有人请看一下代码并帮助我。
ExpandableListAdapter.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;
}
}
activity_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>
listgroupheader.xml
<?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" />
答案 0 :(得分：0)
经过一番尝试，我才意识到，只有将u导航视图的所有内容都放在可扩展列表视图中，导航视图中的expandablelistview才能起作用，因为如果您选择同时使用navigationview内的菜单和可扩展列表视图，填充项目，然后expamdablelistview很可能不会连接到navigationview的标题，并且不会与navigationview的其他项目一起滚动，并且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，让其他子项像普通菜单项一样克隆它们