我使用可扩展的recyclerview作为一种日历，当点击该项目时，它会打开一个标签布局
我一直在尝试使用不同的方法从onitemclick监听器打开一个活动，但一直没有成功。我是开发新手，我想我会尝试堆栈寻求帮助。
我会很乐意帮助你。
这是代码
public class EventActivity extends AppCompatActivity implements ItemClickListener {
RecyclerView mRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_event);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
SectionedExpandableLayoutHelper sectionedExpandableLayoutHelper = new SectionedExpandableLayoutHelper(this,
mRecyclerView, this, 3);
ArrayList<Item> arrayList = new ArrayList<>();
arrayList.add(new Item("March 7", 0));
arrayList.add(new Item("March 8", 1));
arrayList.add(new Item("March 9", 2));
arrayList.add(new Item("March 10", 3));
arrayList.add(new Item("March 11", 4));
arrayList.add(new Item("March 12", 5));
sectionedExpandableLayoutHelper.addSection("Week One", arrayList);
arrayList = new ArrayList<>();
arrayList.add(new Item("March 13", 7));
arrayList.add(new Item("March 14", 8));
arrayList.add(new Item("March 15", 8));
arrayList.add(new Item("March 16", 10));
arrayList.add(new Item("March 17", 11));
arrayList.add(new Item("March 18", 12));
sectionedExpandableLayoutHelper.addSection("Week Two", arrayList);
arrayList = new ArrayList<>();
arrayList.add(new Item("March 19", 13));
arrayList.add(new Item("March 20", 14));
arrayList.add(new Item("March 21", 15));
arrayList.add(new Item("March 22", 16));
arrayList.add(new Item("March 23", 18));
arrayList.add(new Item("March 25", 19));
sectionedExpandableLayoutHelper.addSection("Week Three", arrayList);
sectionedExpandableLayoutHelper.notifyDataSetChanged();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void itemClicked(Item item) {
}
@Override
public void itemClicked(Section section) {
}
}
Here are the adapters
ItemClickListener interface
public interface ItemClickListener {
void itemClicked(Item item);
void itemClicked(Section section);
}
Section
public class Section {
private final String name;
public boolean isExpanded;
public Section(String name) {
this.name = name;
isExpanded = true;
}
public String getName() {
return name;
}
}
Sectioned Expandable Grid Adapter
public class SectionedExpandableGridAdapter extends
RecyclerView.Adapter<SectionedExpandableGridAdapter.ViewHolder> {
//data array
private ArrayList<Object> mDataArrayList;
//context
private final Context mContext;
//listeners
private final ItemClickListener mItemClickListener;
private final SectionStateChangeListener mSectionStateChangeListener;
//view type
private static final int VIEW_TYPE_SECTION = R.layout.layout_section;
private static final int VIEW_TYPE_ITEM = R.layout.layout_item;
public SectionedExpandableGridAdapter(Context context, ArrayList<Object>
dataArrayList,
final GridLayoutManager
gridLayoutManager, ItemClickListener itemClickListener,
SectionStateChangeListener
sectionStateChangeListener) {
mContext = context;
mItemClickListener = itemClickListener;
mSectionStateChangeListener = sectionStateChangeListener;
mDataArrayList = dataArrayList;
gridLayoutManager.setSpanSizeLookup(new
GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
return isSection(position)?gridLayoutManager.getSpanCount():1;
}
});
}
private boolean isSection(int position) {
return mDataArrayList.get(position) instanceof Section;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ViewHolder(LayoutInflater.from(mContext).inflate(viewType,
parent, false), viewType);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
switch (holder.viewType) {
case VIEW_TYPE_ITEM :
final Item item = (Item) mDataArrayList.get(position);
holder.itemTextView.setText(item.getName());
holder.view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mItemClickListener.itemClicked(item);
}
});
break;
case VIEW_TYPE_SECTION :
final Section section = (Section) mDataArrayList.get(position);
holder.sectionTextView.setText(section.getName());
holder.sectionTextView.setOnClickListener(new
View.OnClickListener() {
@Override
public void onClick(View v) {
mItemClickListener.itemClicked(section);
}
});
holder.sectionToggleButton.setChecked(section.isExpanded);
holder.sectionToggleButton.setOnCheckedChangeListener(new
CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mSectionStateChangeListener.onSectionStateChanged(section,
isChecked);
}
});
break;
}
}
@Override
public int getItemCount() {
return mDataArrayList.size();
}
@Override
public int getItemViewType(int position) {
if (isSection(position))
return VIEW_TYPE_SECTION;
else return VIEW_TYPE_ITEM;
}
protected static class ViewHolder extends RecyclerView.ViewHolder {
//common
View view;
int viewType;
//for section
TextView sectionTextView;
ToggleButton sectionToggleButton;
//for item
TextView itemTextView;
public ViewHolder(View view, int viewType) {
super(view);
this.viewType = viewType;
this.view = view;
if (viewType == VIEW_TYPE_ITEM) {
itemTextView = (TextView) view.findViewById(R.id.text_item);
} else {
sectionTextView = (TextView)
view.findViewById(R.id.text_section);
sectionToggleButton = (ToggleButton)
view.findViewById(R.id.toggle_button_section);
}
}
}
}
Sectioned Expandable Layout Helper
public class SectionedExpandableLayoutHelper implements
SectionStateChangeListener {
//data list
private LinkedHashMap<Section, ArrayList<Item>> mSectionDataMap = new
LinkedHashMap<Section, ArrayList<Item>>();
private ArrayList<Object> mDataArrayList = new ArrayList<Object>();
//section map
private HashMap<String, Section> mSectionMap = new HashMap<String,
Section>();
//adapter
private SectionedExpandableGridAdapter mSectionedExpandableGridAdapter;
//recycler view
RecyclerView mRecyclerView;
public SectionedExpandableLayoutHelper(Context context, RecyclerView
recyclerView, ItemClickListener itemClickListener,
int gridSpanCount) {
//setting the recycler view
GridLayoutManager gridLayoutManager = new GridLayoutManager(context,
gridSpanCount);
recyclerView.setLayoutManager(gridLayoutManager);
mSectionedExpandableGridAdapter = new
SectionedExpandableGridAdapter(context, mDataArrayList,
gridLayoutManager, itemClickListener, this);
recyclerView.setAdapter(mSectionedExpandableGridAdapter);
mRecyclerView = recyclerView;
}
public void notifyDataSetChanged() {
generateDataList();
mSectionedExpandableGridAdapter.notifyDataSetChanged();
}
public void addSection(String section, ArrayList<Item> items) {
Section newSection;
mSectionMap.put(section, (newSection = new Section(section)));
mSectionDataMap.put(newSection, items);
}
public void addItem(String section, Item item) {
mSectionDataMap.get(mSectionMap.get(section)).add(item);
}
public void removeItem(String section, Item item) {
mSectionDataMap.get(mSectionMap.get(section)).remove(item);
}
public void removeSection(String section) {
mSectionDataMap.remove(mSectionMap.get(section));
mSectionMap.remove(section);
}
private void generateDataList () {
mDataArrayList.clear();
for (Map.Entry<Section, ArrayList<Item>> entry :
mSectionDataMap.entrySet()) {
Section key;
mDataArrayList.add((key = entry.getKey()));
if (key.isExpanded)
mDataArrayList.addAll(entry.getValue());
}
}
@Override
public void onSectionStateChanged(Section section, boolean isOpen) {
if (!mRecyclerView.isComputingLayout()) {
section.isExpanded = isOpen;
notifyDataSetChanged();
}
}
}
Section State Interface
public interface SectionStateChangeListener {
void onSectionStateChanged(Section section, boolean isOpen);
}
Models
Item
public class Item {
private final String name;
private final int id;
public Item(String name, int id) {
this.name = name;
this.id = id;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
}
here is the xml
event layout
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="#E0F2F1"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recycler_view"/>
</RelativeLayout>
Layout Item
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:elevation="5dp"
android:layout_margin="@dimen/item_margin"
android:layout_width="wrap_content"
android:layout_height="@dimen/item_height">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:id="@+id/text_item"
android:gravity="center"
android:layout_gravity="center" />
</android.support.v7.widget.CardView>
layout section
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
app:elevation="5dp"
android:layout_marginTop="7dp"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#26A69A"
android:orientation="horizontal">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="@dimen/section_padding"
android:paddingBottom="@dimen/section_padding"
android:paddingStart="@dimen/section_text_padding_left"
android:background="@drawable/theme_color"
android:textColor="#fff"
android:textSize="@dimen/section_text_size"
android:id="@+id/text_section"
android:layout_weight="0.12"/>
<ToggleButton
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/toggle_button_section"
android:contentDescription="@string/image_button_content_description"
android:background="@drawable/selector_section_toggle"
android:padding="@dimen/section_padding"
android:textOn=""
android:textOff=""
android:layout_weight="0.88"/>
</LinearLayout>
</android.support.v7.widget.CardView>