单击导航抽屉项目，导航抽屉中的新列表视图
On navigation drawer item click, new list view in navigation drawer
我试图在导航抽屉中获得以下功能，但我无法破坏它。
场景：-
我有一个导航抽屉。单击导航抽屉中的任何项目时，我需要一个列表视图来打开其中的多个项目，可以进一步选择这些项目以实现某种功能。
我还附上了将以适当方式定义我的需求的图像。请提供图片参考以获得我基本和实际需要的东西。
如有任何帮助，我们将不胜感激..！
您可以使用 creating a navigation drawer 上的 Android 开发人员教程，但您不使用 ListView，而是选择 ExpandableListView。
例如，在该教程中，您可以看到他们在第一段代码中使用了 ListView。取而代之的是，将其更改为如下所示：
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ExpandableListView android:id="@+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"/>
</android.support.v4.widget.DrawerLayout>
如何实现 ExpandableListView 适配器在 Android Hive 上的 this 教程中有很好的解释。我不会在这里粘贴他们的代码，因为这是一个很长的教程。如果您有任何问题，请在下方评论。
这是我的代码。
- 我正在为子项使用回收站视图。
- 正在往下扩字
我正在使用 2 个库。
编译'com.h6ah4i.android.widget.advrecyclerview:advrecyclerview:0.7.1'
编译 'com.wnafee:vector-compat:1.0.5'
这是抽屉式导航片段
public class NavigationDrawerFragment extends Fragment implements NavigationDrawerCallbacks {
private static final String SAVED_STATE_EXPANDABLE_ITEM_MANAGER = "RecyclerViewExpandableItemManager";
/**
* Remember the position of the selected item.
*/
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
/**
* Per the design guidelines, you should show the drawer on launch until the user manually
* expands it. This shared preference tracks this.
*/
private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";
/**
* A pointer to the current callbacks instance (the Activity).
*/
private NavigationDrawerCallbacks mCallbacks;
/**
* Helper component that ties the action bar to the navigation drawer.
*/
private ActionBarDrawerToggle mActionBarDrawerToggle;
private DrawerLayout mDrawerLayout;
private RecyclerView mDrawerList;
private View mFragmentContainerView;
private int mCurrentSelectedPosition = -1;
private boolean mFromSavedInstanceState;
private boolean mUserLearnedDrawer;
private Subscription subscription;
@Inject CategoryService categoryService;
private MyExpandableItemAdapter expandableItemAdapter;
private RecyclerView.Adapter wrappedAdapter;
private RecyclerViewExpandableItemManager expandableItemManager;
private LinearLayoutManager linearLayoutManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DelhiShopApplication.component().inject(this);
// Read in the flag indicating whether or not the user has demonstrated awareness of the
// drawer. See PREF_USER_LEARNED_DRAWER for details.
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);
if (savedInstanceState != null) {
mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
mFromSavedInstanceState = true;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
mDrawerList = (RecyclerView) view.findViewById(R.id.drawerList);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mDrawerList.setLayoutManager(layoutManager);
mDrawerList.setHasFixedSize(true);
if (mCurrentSelectedPosition != -1) {
selectItem(mCurrentSelectedPosition);
}
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
final Parcelable eimSavedState = (savedInstanceState != null) ? savedInstanceState.getParcelable(SAVED_STATE_EXPANDABLE_ITEM_MANAGER) : null;
expandableItemManager = new RecyclerViewExpandableItemManager(eimSavedState);
}
private void setRecyclerView(Category category) {
linearLayoutManager = new LinearLayoutManager(getActivity());
final MyExpandableItemAdapter myItemAdapter = new MyExpandableItemAdapter(category);
wrappedAdapter = expandableItemManager.createWrappedAdapter(myItemAdapter);
final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();
// Change animations are enabled by default since support-v7-recyclerview v22.
// Need to disable them when using animation indicator.
animator.setSupportsChangeAnimations(false);
mDrawerList.setLayoutManager(linearLayoutManager);
mDrawerList.setAdapter(wrappedAdapter); // requires *wrapped* adapter
mDrawerList.setItemAnimator(animator);
mDrawerList.setHasFixedSize(false);
// additional decorations
//noinspection StatementWithEmptyBody
// if (supportsViewElevation()) {
// // Lollipop 或更高版本具有本机投影功能。不需要 ItemShadowDecorator。
// } 别的 {
// mDrawerList.addItemDecoration(新的 ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable
// .material_shadow_z1)));
// }
expandableItemManager.attachRecyclerView(mDrawerList);
}
private boolean supportsViewElevation() {
return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP);
}
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
public ActionBarDrawerToggle getActionBarDrawerToggle() {
return mActionBarDrawerToggle;
}
public DrawerLayout getDrawerLayout() {
return mDrawerLayout;
}
@Override
public void onNavigationDrawerItemSelected(int position) {
selectItem(position);
}
/**
* Users of this fragment must call this method to set up the navigation drawer interactions.
*
* @param fragmentId The android:id of this fragment in its activity's layout.
* @param drawerLayout The DrawerLayout containing this fragment's UI.
* @param toolbar The Toolbar of the activity.
*/
public void setup(int fragmentId, DrawerLayout drawerLayout, Toolbar toolbar) {
mFragmentContainerView = (View) getActivity().findViewById(fragmentId).getParent();
mDrawerLayout = drawerLayout;
mDrawerLayout.setStatusBarBackgroundColor(getResources().getColor(R.color.myPrimaryDarkColor));
mActionBarDrawerToggle = new ActionBarDrawerToggle(getActivity(), mDrawerLayout, toolbar, R.string
.drawer_open, R.string.drawer_close) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
if (!mUserLearnedDrawer) {
mUserLearnedDrawer = true;
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(getActivity());
sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
};
// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
// per the navigation drawer design guidelines.
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mActionBarDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mActionBarDrawerToggle);
}
private void selectItem(int position) {
mCurrentSelectedPosition = position;
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position);
}
((NavigationDrawerAdapter) mDrawerList.getAdapter()).selectPosition(position);
}
public void openDrawer() {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
public void closeDrawer() {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallbacks = (NavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {
throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
}
}
@Override
public void onDetach() {
super.onDetach();
mCallbacks = null;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
if (expandableItemManager != null) {
outState.putParcelable(
SAVED_STATE_EXPANDABLE_ITEM_MANAGER,
expandableItemManager.getSavedState());
}
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Forward the new configuration the drawer toggle component.
mActionBarDrawerToggle.onConfigurationChanged(newConfig);
}
public void setUserData(String user, String email, Bitmap avatar) {
((TextView) mFragmentContainerView.findViewById(R.id.txtUserEmail)).setText(email);
((TextView) mFragmentContainerView.findViewById(R.id.txtUsername)).setText(user);
}
public View getGoogleDrawer() {
return mFragmentContainerView.findViewById(R.id.googleDrawer);
}
@Override
public void onResume() {
super.onResume();
subscription = categoryService.getCategories()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<Category>() {
@Override
public void call(Category category) {
// sadfksdjf
expandableItemAdapter = new MyExpandableItemAdapter(category);
mDrawerList.setAdapter(expandableItemAdapter);
setRecyclerView(category);
}
}, new Action1<Throwable>() {
@Override
public void call(Throwable throwable) {
// slkdfj
}
});
}
@Override
public void onPause() {
subscription.unsubscribe();
super.onPause();
}
@Override
public void onDestroyView() {
super.onDestroyView();
if (expandableItemManager != null) {
expandableItemManager.release();
expandableItemManager = null;
}
}
这是我的可扩展项目适配器
public class MyExpandableItemAdapter
extends AbstractExpandableItemAdapter<MyExpandableItemAdapter.MyGroupViewHolder, MyExpandableItemAdapter.MyChildViewHolder> {
private static final String TAG = "MyExpandableItemAdapter";
private Category category;
public static abstract class MyBaseViewHolder extends AbstractExpandableItemViewHolder {
public ViewGroup mContainer;
public View mDragHandle;
public TextView mTextView;
public MyBaseViewHolder(View v) {
super(v);
mContainer = (ViewGroup) v.findViewById(R.id.container);
mDragHandle = v.findViewById(R.id.drag_handle);
mTextView = (TextView) v.findViewById(android.R.id.text1);
// hide the drag handle
mDragHandle.setVisibility(View.GONE);
}
}
public static class MyGroupViewHolder extends MyBaseViewHolder {
public MorphButtonCompat mMorphButton;
public MyGroupViewHolder(View v) {
super(v);
mMorphButton = new MorphButtonCompat(v.findViewById(R.id.indicator));
}
}
public static class MyChildViewHolder extends MyBaseViewHolder {
public MyChildViewHolder(View v) {
super(v);
}
}
public MyExpandableItemAdapter(Category dataProvider) {
category = dataProvider;
// ExpandableItemAdapter requires stable ID, and also
// have to implement the getGroupItemId()/getChildItemId() methods appropriately.
setHasStableIds(true);
}
@Override
public int getGroupCount() {
return category.getSubCategorySize();
}
@Override
public int getChildCount(int groupPosition) {
return getGroupCategoryAtPosition(groupPosition).getSubCategorySize();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return groupPosition * 100 + childPosition;
}
@Override
public int getGroupItemViewType(int groupPosition) {
return 0;
}
@Override
public int getChildItemViewType(int groupPosition, int childPosition) {
return 0;
}
@Override
public MyGroupViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View v = inflater.inflate(R.layout.list_group_item, parent, false);
return new MyGroupViewHolder(v);
}
@Override
public MyChildViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View v = inflater.inflate(R.layout.list_item, parent, false);
return new MyChildViewHolder(v);
}
@Override
public void onBindGroupViewHolder(MyGroupViewHolder holder, int groupPosition, int viewType) {
// child item
final Category groupItem = getGroupCategoryAtPosition(groupPosition);
// set text
holder.mTextView.setText(groupItem.getCategoryName());
// mark as clickable
holder.itemView.setClickable(true);
// set background resource (target view ID: container)
final int expandState = holder.getExpandStateFlags();
if ((expandState & RecyclerViewExpandableItemManager.STATE_FLAG_IS_UPDATED) != 0) {
int bgResId;
MorphButton.MorphState indicatorState;
if ((expandState & RecyclerViewExpandableItemManager.STATE_FLAG_IS_EXPANDED) != 0) {
bgResId = R.drawable.bg_group_item_expanded_state;
indicatorState = MorphButton.MorphState.END;
} else {
bgResId = R.drawable.bg_group_item_normal_state;
indicatorState = MorphButton.MorphState.START;
}
holder.mContainer.setBackgroundResource(bgResId);
if (holder.mMorphButton.getState() != indicatorState) {
holder.mMorphButton.setState(indicatorState, true);
}
}
}
@Override
public void onBindChildViewHolder(MyChildViewHolder holder, int groupPosition, int childPosition, int viewType) {
// group item
final Category childCategory = getChildCategory(groupPosition, childPosition);
// set text
holder.mTextView.setText(childCategory.getCategoryName());
// set background resource (target view ID: container)
int bgResId;
bgResId = R.drawable.bg_item_normal_state;
holder.mContainer.setBackgroundResource(bgResId);
}
@Override
public boolean onCheckCanExpandOrCollapseGroup(MyGroupViewHolder holder, int groupPosition, int x, int y, boolean expand) {
Category groupCategory = getGroupCategoryAtPosition(groupPosition);
if (groupCategory.getSubCategorySize() == 0) {
return false;
}
// check is enabled
if (!(holder.itemView.isEnabled() && holder.itemView.isClickable())) {
return false;
}
final View containerView = holder.mContainer;
final View dragHandleView = holder.mDragHandle;
final int offsetX = containerView.getLeft() + (int) (ViewCompat.getTranslationX(containerView) + 0.5f);
final int offsetY = containerView.getTop() + (int) (ViewCompat.getTranslationY(containerView) + 0.5f);
return !hitTest(dragHandleView, x - offsetX, y - offsetY);
}
private Category getGroupCategoryAtPosition(int groupPosition) {
return category.getSubCategory().get(groupPosition);
}
private Category getChildCategory(int groupPosition, int childPosition) {
return getGroupCategoryAtPosition(groupPosition).getSubCategory().get(childPosition);
}
public static boolean hitTest(View v, int x, int y) {
final int tx = (int) (ViewCompat.getTranslationX(v) + 0.5f);
final int ty = (int) (ViewCompat.getTranslationY(v) + 0.5f);
final int left = v.getLeft() + tx;
final int right = v.getRight() + tx;
final int top = v.getTop() + ty;
final int bottom = v.getBottom() + ty;
return (x >= left) && (x <= right) && (y >= top) && (y <= bottom);
}
}
这是我的 list_group_item.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
style="@style/commonListItemStyle"
android:layout_width="match_parent"
android:layout_height="96dp"
android:layout_marginTop="8dp"
android:background="#ffffff">
<RelativeLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
tools:ignore="UselessParent">
<View
android:id="@+id/drag_handle"
android:layout_width="32dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#20000000"
tools:ignore="RtlHardcoded" />
<TextView
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toRightOf="@id/drag_handle"
android:gravity="center" />
</RelativeLayout>
</FrameLayout>
list_item.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
style="@style/commonListItemStyle"
android:layout_width="match_parent"
android:layout_height="64dp"
android:background="@drawable/bg_swipe_item_neutral">
<RelativeLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
tools:ignore="UselessParent">
<View
android:id="@+id/drag_handle"
android:layout_width="32dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#20000000" />
<TextView
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toRightOf="@id/drag_handle"
android:gravity="center"
tools:ignore="RtlHardcoded" />
</RelativeLayout>
</FrameLayout>
正如我看到你的图片，我的理解是，从你的抽屉里点击你想要另一个列表出现在它的右边。我说得对吗？
如果我更正，那么不可能使用 ExpandableListView 因为 ExpandableListView 会在点击的项目下方生成项目。
所以一种解决方案是您可以使用两个 ListView。
抽屉中的第一个 ListView 和 第二个在您的主要内容上 并为两个 ListView 创建自定义适配器。
现在 当用户单击抽屉列表项时，确定单击了哪个选项，例如城市、我的新闻或其他。
识别点击后，您可以根据用户点击的选项为第二个 ListView 填充适配器。并将该适配器应用于第二个 ListView 并通知它。
所以当用户点击抽屉中的另一个项目时，同样的事情也会发生。但是第二个 ListView 的数据将会改变。
希望你明白我在说什么，对你有帮助。
[更新]
好的，所以您的 xml 应该看起来像这样。
注意：我只是为此写了一个框架。
<!-- The main content view -->
<FrameLayout android:id="@+id/content_frame" />
<!-- The navigation drawer -->
<LinearLayout
android:layout_gravity="start"
android:orientation="horizontal">
<ListView
android:layout_weight="1"
android:id="@+id/list1">
</ListView>
<ListView
android:layout_weight="1"
android:id="@+id/list2">
</ListView>
</LinearLayout>
现在就在您的 java 一边。考虑两个列表视图都被引用为 list1 和 list2 ，并且您已经创建了两个适配器 adapter1 和 适配器2.
单击 list1 的项目并应用如下逻辑...
list1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int pos, long l) {
// now here you can get which option is clicked from list1.
// using position and
int your_type = pos;
adapter2.filderDataAccordingToType(your_type);
// create the above method in your second adapter and pass your type like MyNews, City or any other.
// and apply the logic of filtering by passing type to your method
// your_type could be any data type i have take the integer.
// and after filtering data you can notify your adapter.
// so when the data of adpater gets changed your secondlistview get refreshed.
}
});
就是这样。
希望对你有所帮助
我试图在导航抽屉中获得以下功能，但我无法破坏它。
场景：-
我有一个导航抽屉。单击导航抽屉中的任何项目时，我需要一个列表视图来打开其中的多个项目，可以进一步选择这些项目以实现某种功能。
我还附上了将以适当方式定义我的需求的图像。请提供图片参考以获得我基本和实际需要的东西。
如有任何帮助，我们将不胜感激..！
您可以使用 creating a navigation drawer 上的 Android 开发人员教程，但您不使用 ListView，而是选择 ExpandableListView。
例如，在该教程中，您可以看到他们在第一段代码中使用了 ListView。取而代之的是，将其更改为如下所示：
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ExpandableListView android:id="@+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"/>
</android.support.v4.widget.DrawerLayout>
如何实现 ExpandableListView 适配器在 Android Hive 上的 this 教程中有很好的解释。我不会在这里粘贴他们的代码，因为这是一个很长的教程。如果您有任何问题，请在下方评论。
这是我的代码。
- 我正在为子项使用回收站视图。
- 正在往下扩字
我正在使用 2 个库。
编译'com.h6ah4i.android.widget.advrecyclerview:advrecyclerview:0.7.1' 编译 'com.wnafee:vector-compat:1.0.5'
这是抽屉式导航片段
public class NavigationDrawerFragment extends Fragment implements NavigationDrawerCallbacks {
private static final String SAVED_STATE_EXPANDABLE_ITEM_MANAGER = "RecyclerViewExpandableItemManager";
/**
* Remember the position of the selected item.
*/
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
/**
* Per the design guidelines, you should show the drawer on launch until the user manually
* expands it. This shared preference tracks this.
*/
private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";
/**
* A pointer to the current callbacks instance (the Activity).
*/
private NavigationDrawerCallbacks mCallbacks;
/**
* Helper component that ties the action bar to the navigation drawer.
*/
private ActionBarDrawerToggle mActionBarDrawerToggle;
private DrawerLayout mDrawerLayout;
private RecyclerView mDrawerList;
private View mFragmentContainerView;
private int mCurrentSelectedPosition = -1;
private boolean mFromSavedInstanceState;
private boolean mUserLearnedDrawer;
private Subscription subscription;
@Inject CategoryService categoryService;
private MyExpandableItemAdapter expandableItemAdapter;
private RecyclerView.Adapter wrappedAdapter;
private RecyclerViewExpandableItemManager expandableItemManager;
private LinearLayoutManager linearLayoutManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DelhiShopApplication.component().inject(this);
// Read in the flag indicating whether or not the user has demonstrated awareness of the
// drawer. See PREF_USER_LEARNED_DRAWER for details.
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);
if (savedInstanceState != null) {
mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
mFromSavedInstanceState = true;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
mDrawerList = (RecyclerView) view.findViewById(R.id.drawerList);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mDrawerList.setLayoutManager(layoutManager);
mDrawerList.setHasFixedSize(true);
if (mCurrentSelectedPosition != -1) {
selectItem(mCurrentSelectedPosition);
}
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
final Parcelable eimSavedState = (savedInstanceState != null) ? savedInstanceState.getParcelable(SAVED_STATE_EXPANDABLE_ITEM_MANAGER) : null;
expandableItemManager = new RecyclerViewExpandableItemManager(eimSavedState);
}
private void setRecyclerView(Category category) {
linearLayoutManager = new LinearLayoutManager(getActivity());
final MyExpandableItemAdapter myItemAdapter = new MyExpandableItemAdapter(category);
wrappedAdapter = expandableItemManager.createWrappedAdapter(myItemAdapter);
final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();
// Change animations are enabled by default since support-v7-recyclerview v22.
// Need to disable them when using animation indicator.
animator.setSupportsChangeAnimations(false);
mDrawerList.setLayoutManager(linearLayoutManager);
mDrawerList.setAdapter(wrappedAdapter); // requires *wrapped* adapter
mDrawerList.setItemAnimator(animator);
mDrawerList.setHasFixedSize(false);
// additional decorations
//noinspection StatementWithEmptyBody
// if (supportsViewElevation()) { // // Lollipop 或更高版本具有本机投影功能。不需要 ItemShadowDecorator。 // } 别的 { // mDrawerList.addItemDecoration(新的 ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable // .material_shadow_z1))); // }
expandableItemManager.attachRecyclerView(mDrawerList);
}
private boolean supportsViewElevation() {
return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP);
}
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
public ActionBarDrawerToggle getActionBarDrawerToggle() {
return mActionBarDrawerToggle;
}
public DrawerLayout getDrawerLayout() {
return mDrawerLayout;
}
@Override
public void onNavigationDrawerItemSelected(int position) {
selectItem(position);
}
/**
* Users of this fragment must call this method to set up the navigation drawer interactions.
*
* @param fragmentId The android:id of this fragment in its activity's layout.
* @param drawerLayout The DrawerLayout containing this fragment's UI.
* @param toolbar The Toolbar of the activity.
*/
public void setup(int fragmentId, DrawerLayout drawerLayout, Toolbar toolbar) {
mFragmentContainerView = (View) getActivity().findViewById(fragmentId).getParent();
mDrawerLayout = drawerLayout;
mDrawerLayout.setStatusBarBackgroundColor(getResources().getColor(R.color.myPrimaryDarkColor));
mActionBarDrawerToggle = new ActionBarDrawerToggle(getActivity(), mDrawerLayout, toolbar, R.string
.drawer_open, R.string.drawer_close) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
if (!mUserLearnedDrawer) {
mUserLearnedDrawer = true;
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(getActivity());
sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
};
// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
// per the navigation drawer design guidelines.
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mActionBarDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mActionBarDrawerToggle);
}
private void selectItem(int position) {
mCurrentSelectedPosition = position;
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position);
}
((NavigationDrawerAdapter) mDrawerList.getAdapter()).selectPosition(position);
}
public void openDrawer() {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
public void closeDrawer() {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallbacks = (NavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {
throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
}
}
@Override
public void onDetach() {
super.onDetach();
mCallbacks = null;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
if (expandableItemManager != null) {
outState.putParcelable(
SAVED_STATE_EXPANDABLE_ITEM_MANAGER,
expandableItemManager.getSavedState());
}
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Forward the new configuration the drawer toggle component.
mActionBarDrawerToggle.onConfigurationChanged(newConfig);
}
public void setUserData(String user, String email, Bitmap avatar) {
((TextView) mFragmentContainerView.findViewById(R.id.txtUserEmail)).setText(email);
((TextView) mFragmentContainerView.findViewById(R.id.txtUsername)).setText(user);
}
public View getGoogleDrawer() {
return mFragmentContainerView.findViewById(R.id.googleDrawer);
}
@Override
public void onResume() {
super.onResume();
subscription = categoryService.getCategories()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<Category>() {
@Override
public void call(Category category) {
// sadfksdjf
expandableItemAdapter = new MyExpandableItemAdapter(category);
mDrawerList.setAdapter(expandableItemAdapter);
setRecyclerView(category);
}
}, new Action1<Throwable>() {
@Override
public void call(Throwable throwable) {
// slkdfj
}
});
}
@Override
public void onPause() {
subscription.unsubscribe();
super.onPause();
}
@Override
public void onDestroyView() {
super.onDestroyView();
if (expandableItemManager != null) {
expandableItemManager.release();
expandableItemManager = null;
}
}
这是我的可扩展项目适配器
public class MyExpandableItemAdapter
extends AbstractExpandableItemAdapter<MyExpandableItemAdapter.MyGroupViewHolder, MyExpandableItemAdapter.MyChildViewHolder> {
private static final String TAG = "MyExpandableItemAdapter";
private Category category;
public static abstract class MyBaseViewHolder extends AbstractExpandableItemViewHolder {
public ViewGroup mContainer;
public View mDragHandle;
public TextView mTextView;
public MyBaseViewHolder(View v) {
super(v);
mContainer = (ViewGroup) v.findViewById(R.id.container);
mDragHandle = v.findViewById(R.id.drag_handle);
mTextView = (TextView) v.findViewById(android.R.id.text1);
// hide the drag handle
mDragHandle.setVisibility(View.GONE);
}
}
public static class MyGroupViewHolder extends MyBaseViewHolder {
public MorphButtonCompat mMorphButton;
public MyGroupViewHolder(View v) {
super(v);
mMorphButton = new MorphButtonCompat(v.findViewById(R.id.indicator));
}
}
public static class MyChildViewHolder extends MyBaseViewHolder {
public MyChildViewHolder(View v) {
super(v);
}
}
public MyExpandableItemAdapter(Category dataProvider) {
category = dataProvider;
// ExpandableItemAdapter requires stable ID, and also
// have to implement the getGroupItemId()/getChildItemId() methods appropriately.
setHasStableIds(true);
}
@Override
public int getGroupCount() {
return category.getSubCategorySize();
}
@Override
public int getChildCount(int groupPosition) {
return getGroupCategoryAtPosition(groupPosition).getSubCategorySize();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return groupPosition * 100 + childPosition;
}
@Override
public int getGroupItemViewType(int groupPosition) {
return 0;
}
@Override
public int getChildItemViewType(int groupPosition, int childPosition) {
return 0;
}
@Override
public MyGroupViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View v = inflater.inflate(R.layout.list_group_item, parent, false);
return new MyGroupViewHolder(v);
}
@Override
public MyChildViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View v = inflater.inflate(R.layout.list_item, parent, false);
return new MyChildViewHolder(v);
}
@Override
public void onBindGroupViewHolder(MyGroupViewHolder holder, int groupPosition, int viewType) {
// child item
final Category groupItem = getGroupCategoryAtPosition(groupPosition);
// set text
holder.mTextView.setText(groupItem.getCategoryName());
// mark as clickable
holder.itemView.setClickable(true);
// set background resource (target view ID: container)
final int expandState = holder.getExpandStateFlags();
if ((expandState & RecyclerViewExpandableItemManager.STATE_FLAG_IS_UPDATED) != 0) {
int bgResId;
MorphButton.MorphState indicatorState;
if ((expandState & RecyclerViewExpandableItemManager.STATE_FLAG_IS_EXPANDED) != 0) {
bgResId = R.drawable.bg_group_item_expanded_state;
indicatorState = MorphButton.MorphState.END;
} else {
bgResId = R.drawable.bg_group_item_normal_state;
indicatorState = MorphButton.MorphState.START;
}
holder.mContainer.setBackgroundResource(bgResId);
if (holder.mMorphButton.getState() != indicatorState) {
holder.mMorphButton.setState(indicatorState, true);
}
}
}
@Override
public void onBindChildViewHolder(MyChildViewHolder holder, int groupPosition, int childPosition, int viewType) {
// group item
final Category childCategory = getChildCategory(groupPosition, childPosition);
// set text
holder.mTextView.setText(childCategory.getCategoryName());
// set background resource (target view ID: container)
int bgResId;
bgResId = R.drawable.bg_item_normal_state;
holder.mContainer.setBackgroundResource(bgResId);
}
@Override
public boolean onCheckCanExpandOrCollapseGroup(MyGroupViewHolder holder, int groupPosition, int x, int y, boolean expand) {
Category groupCategory = getGroupCategoryAtPosition(groupPosition);
if (groupCategory.getSubCategorySize() == 0) {
return false;
}
// check is enabled
if (!(holder.itemView.isEnabled() && holder.itemView.isClickable())) {
return false;
}
final View containerView = holder.mContainer;
final View dragHandleView = holder.mDragHandle;
final int offsetX = containerView.getLeft() + (int) (ViewCompat.getTranslationX(containerView) + 0.5f);
final int offsetY = containerView.getTop() + (int) (ViewCompat.getTranslationY(containerView) + 0.5f);
return !hitTest(dragHandleView, x - offsetX, y - offsetY);
}
private Category getGroupCategoryAtPosition(int groupPosition) {
return category.getSubCategory().get(groupPosition);
}
private Category getChildCategory(int groupPosition, int childPosition) {
return getGroupCategoryAtPosition(groupPosition).getSubCategory().get(childPosition);
}
public static boolean hitTest(View v, int x, int y) {
final int tx = (int) (ViewCompat.getTranslationX(v) + 0.5f);
final int ty = (int) (ViewCompat.getTranslationY(v) + 0.5f);
final int left = v.getLeft() + tx;
final int right = v.getRight() + tx;
final int top = v.getTop() + ty;
final int bottom = v.getBottom() + ty;
return (x >= left) && (x <= right) && (y >= top) && (y <= bottom);
}
}
这是我的 list_group_item.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
style="@style/commonListItemStyle"
android:layout_width="match_parent"
android:layout_height="96dp"
android:layout_marginTop="8dp"
android:background="#ffffff">
<RelativeLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
tools:ignore="UselessParent">
<View
android:id="@+id/drag_handle"
android:layout_width="32dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#20000000"
tools:ignore="RtlHardcoded" />
<TextView
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toRightOf="@id/drag_handle"
android:gravity="center" />
</RelativeLayout>
</FrameLayout>
list_item.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
style="@style/commonListItemStyle"
android:layout_width="match_parent"
android:layout_height="64dp"
android:background="@drawable/bg_swipe_item_neutral">
<RelativeLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
tools:ignore="UselessParent">
<View
android:id="@+id/drag_handle"
android:layout_width="32dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#20000000" />
<TextView
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toRightOf="@id/drag_handle"
android:gravity="center"
tools:ignore="RtlHardcoded" />
</RelativeLayout>
</FrameLayout>
正如我看到你的图片，我的理解是，从你的抽屉里点击你想要另一个列表出现在它的右边。我说得对吗？ 如果我更正，那么不可能使用 ExpandableListView 因为 ExpandableListView 会在点击的项目下方生成项目。
所以一种解决方案是您可以使用两个 ListView。
抽屉中的第一个 ListView 和 第二个在您的主要内容上 并为两个 ListView 创建自定义适配器。
现在 当用户单击抽屉列表项时，确定单击了哪个选项，例如城市、我的新闻或其他。
识别点击后，您可以根据用户点击的选项为第二个 ListView 填充适配器。并将该适配器应用于第二个 ListView 并通知它。
所以当用户点击抽屉中的另一个项目时，同样的事情也会发生。但是第二个 ListView 的数据将会改变。
希望你明白我在说什么，对你有帮助。
[更新]
好的，所以您的 xml 应该看起来像这样。
注意：我只是为此写了一个框架。
<!-- The main content view -->
<FrameLayout android:id="@+id/content_frame" />
<!-- The navigation drawer -->
<LinearLayout
android:layout_gravity="start"
android:orientation="horizontal">
<ListView
android:layout_weight="1"
android:id="@+id/list1">
</ListView>
<ListView
android:layout_weight="1"
android:id="@+id/list2">
</ListView>
</LinearLayout>
现在就在您的 java 一边。考虑两个列表视图都被引用为 list1 和 list2 ，并且您已经创建了两个适配器 adapter1 和 适配器2.
单击 list1 的项目并应用如下逻辑...
list1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int pos, long l) {
// now here you can get which option is clicked from list1.
// using position and
int your_type = pos;
adapter2.filderDataAccordingToType(your_type);
// create the above method in your second adapter and pass your type like MyNews, City or any other.
// and apply the logic of filtering by passing type to your method
// your_type could be any data type i have take the integer.
// and after filtering data you can notify your adapter.
// so when the data of adpater gets changed your secondlistview get refreshed.
}
});
就是这样。 希望对你有所帮助