我有两个项目，我想同时显示两个项目。但是问题是，我只能在RecyclerView中显示一项。
我已经尝试在一个适配器中创建两个ViewHolder，但仍然只能显示一个项目。
ShowFavouriteList.java
UnicodeString Maskstr = Edit2->Text; //My char*Problem above
const char *chr = AnsiString(Maskstr).c_str();
char* MaskConverted = const_cast<char*>( chr );
unsigned char NewArray[40];
strcpy( (char*) NewArray, MaskConverted );
AdapterFavList1.java
public class ShowFavouriteList extends AppCompatActivity {
private RecyclerView recyclerView;
private TextView noFavtsTV;
AppPreferences appPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show_favourite_list);
SwipeRefreshLayout pullToRefresh = findViewById(R.id.pullToRefresh);
pullToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
finish();
startActivity(getIntent());
}
});
//toolbar logo and desc
Toolbar topToolBar = (Toolbar) findViewById(R.id.toolbarTidur);
setSupportActionBar(topToolBar); //munculkan menu ke toolbar
getSupportActionBar().setDisplayHomeAsUpEnabled(true); //this line shows back button
recyclerView = findViewById(R.id.recycler_view);
noFavtsTV = findViewById(R.id.no_favt_text);
SharedPreferences sharedPreferences = getApplicationContext().getSharedPreferences("MyPref", 0);
SharedPreferences sPTuru = getApplicationContext().getSharedPreferences("MyTuru", 0);
PreferenceMenejer preferenceMenejer = new PreferenceMenejer(sharedPreferences, sPTuru);
appPreferences = new AppPreferences(preferenceMenejer);
fetchData();
} // Oncreate
private void fetchData() {
List<Story> storyList = appPreferences.getFavouriteCardList();
List<YukulModel> yukulList = appPreferences.getFavouriteYukul();
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
recyclerView.setAdapter(new AdapterFavList1(this, storyList, yukulList, appPreferences));
if(storyList != null && storyList.size() > 0) {
showNoFavtText(false);
for(int i=0; i<storyList.size(); i++) {
Story story = new Story();
story.getName();
storyList.add(story);
}
}
if(yukulList != null && yukulList.size() > 0) {
showNoFavtText(false);
for(int i=0; i<yukulList.size(); i++) {
YukulModel stori = new YukulModel();
stori.getName();
yukulList.add(stori);
}
}
}
private void showNoFavtText(boolean show) {
noFavtsTV.setVisibility(show ? View.VISIBLE : View.GONE); //jika data yang ditampilkan tidak ada, maka show noFavsTv
recyclerView.setVisibility(show ? View.GONE : View.VISIBLE); //jika data yang ditampilkan tidak ada, maka don't show rV
}
@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;
}
// Agar back button pada halaman induk settings berfungsi
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
this.finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}
我希望有人可以解决此问题，以便我可以同时显示它们。
代码已更新[工作]
AdapterFavList1.java
public class AdapterFavList1 extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final String ACTION_LIKE_IMAGE_CLICKEDD = "action_like_image_button";
final int VIEW_TYPE_TIDUR = 0;
final int VIEW_TYPE_YUKUL = 1;
private Context context;
private List<Story> storyList;
private List<YukulModel> yukulList;
private int changedItemPosition;
private boolean isLiked;
private AppPreferences appPreferences;
private SharedPreferences preferences;
private CheckBox checkBox;
public AdapterFavList1(Context context, List<Story> storyList, List<YukulModel> yukulList, AppPreferences appPreferences) {
this.context = context;
this.storyList = storyList;
this.yukulList = yukulList;
this.appPreferences = appPreferences;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if(viewType == VIEW_TYPE_TIDUR) {
return new tidurViewHolder(LayoutInflater.from(context).inflate(R.layout.item_story_favourite_list, parent, false));
}
if(viewType == VIEW_TYPE_YUKUL) {
return new yukulViewHolder(LayoutInflater.from(context).inflate(R.layout.item_favourite_yukul, parent, false));
}
return null;
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
if(holder instanceof tidurViewHolder){
((tidurViewHolder) holder).setViewData(storyList.get(position), holder.getAdapterPosition());
}
if(holder instanceof yukulViewHolder){
((yukulViewHolder) holder).viewDataYukul(yukulList.get(position), holder.getAdapterPosition());
}
}
@Override
public int getItemCount() {
if(storyList== null) {
return yukulList.size();
}
else if(storyList != null) {
return storyList.size();
}
if(yukulList==null) {
return storyList.size();
}
else {
return yukulList.size();
}
}
@Override
public int getItemViewType(int position){
if(storyList != null && storyList.size() > 0){
return VIEW_TYPE_TIDUR;
}
if(yukulList != null && yukulList.size() > 0){
return VIEW_TYPE_YUKUL;
}
return -1;
}
public void tidurPutHeart(boolean isChecked, int position) {
SharedPreferences tidursharedPreferences = context.getSharedPreferences("Turu", Activity.MODE_PRIVATE);
SharedPreferences.Editor tidureditor = tidursharedPreferences.edit();
Story tidurstory = storyList.get(position);
tidureditor.putBoolean(tidurstory.getIdStory(), isChecked);
tidureditor.commit();
}
public boolean tidurGetHeart(int position) {
SharedPreferences tidursharedPreferences = context.getSharedPreferences("Turu", Activity.MODE_PRIVATE);
Story tidurstory = storyList.get(position);
boolean isChecked = tidursharedPreferences.getBoolean(tidurstory.getIdStory(), false);
return isChecked;
}
public void yukulPutHeart(boolean isChecked, int position) {
SharedPreferences yukulsharedPreferences = context.getSharedPreferences("Yukul", Activity.MODE_PRIVATE);
SharedPreferences.Editor yukuleditor = yukulsharedPreferences.edit();
YukulModel yukulstory = yukulList.get(position);
yukuleditor.putBoolean(yukulstory.getIdStory(), isChecked);
yukuleditor.commit();
}
public boolean yukulGetHeart(int position) {
SharedPreferences yukulsharedPreferences = context.getSharedPreferences("Yukul", Activity.MODE_PRIVATE);
YukulModel yukulstory = yukulList.get(position);
boolean isChecked = yukulsharedPreferences.getBoolean(yukulstory.getIdStory(), false);
return isChecked;
}
//ViewHolder
public class tidurViewHolder extends RecyclerView.ViewHolder {
private TextView textView;
private CheckBox likeCheckBox;
public tidurViewHolder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.text_view);
likeCheckBox = itemView.findViewById(R.id.like_button_cb);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// send selected contact in callback
Story story = storyList.get(getLayoutPosition());
int ambilId = Integer.parseInt(story.getIdStory());
if (0 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaMauTidur.class);
view.getContext().startActivity(myIntent);
} else if (1 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaBangunt.class);
view.getContext().startActivity(myIntent);
} else if (2 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaJimak.class);
view.getContext().startActivity(myIntent);
} else {
Toast.makeText(context, "No destination page", Toast.LENGTH_SHORT).show();
}
}
});
} // itemView
public void setViewData(final Story story, final int adapterPosition) {
textView.setText(story.getName());
if (story.getIsLiked() == 1) {
likeCheckBox.setChecked(false);
}
else {
likeCheckBox.setChecked(true);
}
boolean isChecked = tidurGetHeart(getAdapterPosition()); // The problem lays here
likeCheckBox.setChecked(isChecked);
likeCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
changedItemPosition = adapterPosition;
if (buttonView.isPressed()) {
if (isChecked) {
//
}
else {
isLiked = false;
tidurPutHeart(isChecked, getAdapterPosition());
appPreferences.deleteCard(story.getIdStory());
updateLikes();
Toast.makeText(context, "Removed", Toast.LENGTH_SHORT).show();
}
}
}
});
} //setviewdata
public void updateLikes() {
if (!isLiked && storyList.get(changedItemPosition).getIsLiked() == 0) { //jika like dicabut (pada posisi hati yang sedang merah) di halaman favourite list
storyList.get(changedItemPosition).setIsLiked(0); //maka cabut juga warna merah di halaman favourite list
storyList.remove(getAdapterPosition());
notifyItemRangeChanged(getAdapterPosition(), storyList.size());
notifyItemRemoved(getAdapterPosition());
}
} //updateLikes
} //viewholder
public class yukulViewHolder extends RecyclerView.ViewHolder {
private TextView textView;
private CheckBox likeCheckBox;
public yukulViewHolder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.text_view);
likeCheckBox = itemView.findViewById(R.id.like_button_cb);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// send selected contact in callback
Story story = storyList.get(getLayoutPosition());
int ambilId = Integer.parseInt(story.getIdStory());
if (0 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaMauTidur.class);
view.getContext().startActivity(myIntent);
} else if (1 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaBangunt.class);
view.getContext().startActivity(myIntent);
} else if (2 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaJimak.class);
view.getContext().startActivity(myIntent);
} else {
Toast.makeText(context, "No destination page", Toast.LENGTH_SHORT).show();
}
}
});
} //itemview
public void viewDataYukul(final YukulModel story, final int adapterPosition) {
textView.setText(story.getName());
if (story.getIsLiked() == 1) {
likeCheckBox.setChecked(false);
}
else {
likeCheckBox.setChecked(true);
}
boolean isChecked = yukulGetHeart(getAdapterPosition()); // The problem lays here
likeCheckBox.setChecked(isChecked);
likeCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
changedItemPosition = adapterPosition;
if (buttonView.isPressed()) {
if (isChecked) {
//
}
else {
isLiked = false;
yukulPutHeart(isChecked, getAdapterPosition());
appPreferences.deleteCardYukul(story.getIdStory());
updateLikeYukul();
Toast.makeText(context, "Removed", Toast.LENGTH_SHORT).show();
}
}
}
});
} //viewdatayukul
public void updateLikeYukul() {
if (!isLiked && yukulList.get(changedItemPosition).getIsLiked() == 0) { //jika like dicabut (pada posisi hati yang sedang merah) di halaman favourite list
yukulList.get(changedItemPosition).setIsLiked(0); //maka cabut juga warna merah di halaman favourite list
yukulList.remove(getAdapterPosition());
notifyItemRangeChanged(getAdapterPosition(), yukulList.size());
notifyItemRemoved(getAdapterPosition());
}
} //updateLikes
} //yukulviewholder
} //HomeAdapter
ShowFavouriteList.java
public class AdapterFavList1 extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final String ACTION_LIKE_IMAGE_CLICKEDD = "action_like_image_button";
final int VIEW_TYPE_TIDUR = 0;
final int VIEW_TYPE_YUKUL = 1;
private Context context;
private AppPreferences appPreferences;
private List<Story> storyList;
private List<YukulModel> yukulList;
private List<Object> collection = new ArrayList<Object>();
private int changedItemPosition;
private int posisiItemYukul;
private boolean isLiked;
public AdapterFavList1(Context context, List<Story> storyList, List<YukulModel> yukulList, AppPreferences appPreferences) {
this.context = context;
this.storyList = storyList;
this.yukulList = yukulList;
this.appPreferences = appPreferences;
addData();
}
public void addData() {
storyList = appPreferences.getFavouriteCardList();
yukulList = appPreferences.getFavouriteYukul();
if(storyList != null && storyList.size() > 0) {
collection.addAll(storyList);
}
if(yukulList != null && yukulList.size() > 0) {
collection.addAll(yukulList);
}
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if(viewType == VIEW_TYPE_TIDUR) {
return new tidurViewHolder(LayoutInflater.from(context).inflate(R.layout.item_story_favourite_list, parent, false));
}
if(viewType == VIEW_TYPE_YUKUL) {
return new yukulViewHolder(LayoutInflater.from(context).inflate(R.layout.item_favourite_yukul, parent, false));
}
return null;
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
Object item = collection.get(position);
if(holder instanceof tidurViewHolder){
((tidurViewHolder) holder).setViewData((Story) item, holder.getAdapterPosition());
}
if(holder instanceof yukulViewHolder){
((yukulViewHolder) holder).viewDataYukul((YukulModel) item, holder.getAdapterPosition());
}
}
@Override
public int getItemCount() {
return collection.size();
}
@Override
public int getItemViewType(int position){
Object item = collection.get(position);
if(item instanceof Story) {
return VIEW_TYPE_TIDUR;
}
if(item instanceof YukulModel){
return VIEW_TYPE_YUKUL;
}
return -1;
}
public void tidurPutHeart(boolean isChecked, Story tidurstory) {
SharedPreferences tidursharedPreferences = context.getSharedPreferences("Turu", Activity.MODE_PRIVATE);
SharedPreferences.Editor tidureditor = tidursharedPreferences.edit();
tidureditor.putBoolean(tidurstory.getIdStory(), isChecked);
tidureditor.commit();
}
public void yukulPutHeart(boolean isChecked, YukulModel yukulstory) {
SharedPreferences yukulsharedPreferences = context.getSharedPreferences("Yukul", Activity.MODE_PRIVATE);
SharedPreferences.Editor yukuleditor = yukulsharedPreferences.edit();
yukuleditor.putBoolean(yukulstory.getIdStory(), isChecked);
yukuleditor.commit();
}
//ViewHolder
public class tidurViewHolder extends RecyclerView.ViewHolder {
private TextView textView;
private CheckBox likeCheckBox;
public tidurViewHolder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.text_view);
likeCheckBox = itemView.findViewById(R.id.like_button_cb);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// send selected contact in callback
Story story = storyList.get(getLayoutPosition());
int ambilId = Integer.parseInt(story.getIdStory());
if (0 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaMauTidur.class);
view.getContext().startActivity(myIntent);
} else if (1 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaBangunt.class);
view.getContext().startActivity(myIntent);
} else if (2 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaJimak.class);
view.getContext().startActivity(myIntent);
} else {
Toast.makeText(context, "No destination page", Toast.LENGTH_SHORT).show();
}
}
});
} // itemView
public void setViewData(final Story story, final int adapterPosition) {
textView.setText(story.getName());
if (story.getIsLiked() == 1) {
likeCheckBox.setChecked(false);
}
else {
likeCheckBox.setChecked(true);
}
likeCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
changedItemPosition = adapterPosition;
if (buttonView.isPressed()) {
if (isChecked) {
//
}
else {
isLiked = false;
tidurPutHeart(isChecked, story);
appPreferences.deleteCard(story.getIdStory());
updateLikes();
Toast.makeText(context, "Removed", Toast.LENGTH_SHORT).show();
if(collection.size() == 0) {
((Activity)context).finish();
context.startActivity(((Activity) context).getIntent());
}
}
}
}
});
} //setviewdata
public void updateLikes() {
if (!isLiked && storyList.get(changedItemPosition).getIsLiked() == 0) { //jika like dicabut (pada posisi hati yang sedang merah) di halaman favourite list
storyList.get(changedItemPosition).setIsLiked(0); //maka cabut juga warna merah di halaman favourite list
notifyItemRangeChanged(getAdapterPosition(), collection.size());
collection.remove(getAdapterPosition());
notifyItemRemoved(getAdapterPosition());
}
} //updateLikes
} //viewholder
public class yukulViewHolder extends RecyclerView.ViewHolder {
private TextView textView;
private CheckBox likeCheckBox;
public yukulViewHolder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.text_view);
likeCheckBox = itemView.findViewById(R.id.like_button_cb);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// send selected contact in callback
Story story = storyList.get(getLayoutPosition());
int ambilId = Integer.parseInt(story.getIdStory());
if (0 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaMauTidur.class);
view.getContext().startActivity(myIntent);
} else if (1 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaBangunt.class);
view.getContext().startActivity(myIntent);
} else if (2 == ambilId) {
Intent myIntent = new Intent(view.getContext(), DoaJimak.class);
view.getContext().startActivity(myIntent);
} else {
Toast.makeText(context, "No destination page", Toast.LENGTH_SHORT).show();
}
}
});
} //itemview
public void viewDataYukul(final YukulModel yukulId, final int adapterPosition) {
textView.setText(yukulId.getName());
if (yukulId.getIsLiked() == 1) {
likeCheckBox.setChecked(false);
}
else {
likeCheckBox.setChecked(true);
}
likeCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
posisiItemYukul = adapterPosition;
if (buttonView.isPressed()) {
if (isChecked) {
//
}
else {
isLiked = false;
yukulPutHeart(isChecked, yukulId);
appPreferences.deleteCardYukul(yukulId.getIdStory());
updateLikeYukul();
Toast.makeText(context, "Removed", Toast.LENGTH_SHORT).show();
if(collection.size() == 0) {
((Activity)context).finish();
context.startActivity(((Activity) context).getIntent());
}
}
}
}
});
} //viewdatayukul
public void updateLikeYukul() {
if (!isLiked && yukulList.get(changedItemPosition).getIsLiked() == 0) { //jika like dicabut (pada posisi hati yang sedang merah) di halaman favourite list
yukulList.get(changedItemPosition).setIsLiked(0); //maka cabut juga warna merah di halaman favourite list
notifyItemRangeChanged(getAdapterPosition(), collection.size());
collection.remove(getAdapterPosition());
notifyItemRemoved(getAdapterPosition());
}
} //updateLikes
} //yukulviewholder
} //HomeAdapter
答案 0 :(得分：2)
我建议不要在适配器中使用2个列表，而只使用1个包含Objects的列表。这样可以减少很多复杂性，您只需要在需要时检查实际类型即可。
public class AdapterFavList1 extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final String ACTION_LIKE_IMAGE_CLICKEDD = "action_like_image_button";
final int VIEW_TYPE_TIDUR = 0;
final int VIEW_TYPE_YUKUL = 1;
private Context context;
private int changedItemPosition;
private boolean isLiked;
private AppPreferences appPreferences;
private SharedPreferences preferences;
private CheckBox checkBox;
private List<Object> collection = new ArrayList<Object>();
public AdapterFavList1(Context context, List<Story> storyList, List<YukulModel> yukulList, AppPreferences appPreferences) {
this.context = context;
this.appPreferences = appPreferences;
// TODO: Sort these however you wish.
collection.addAll(storyList);
collection.addAll(yukulList);
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if(viewType == VIEW_TYPE_TIDUR) {
return new tidurViewHolder(LayoutInflater.from(context).inflate(R.layout.item_story_favourite_list, parent, false));
}
if(viewType == VIEW_TYPE_YUKUL) {
return new yukulViewHolder(LayoutInflater.from(context).inflate(R.layout.item_favourite_yukul, parent, false));
}
return null;
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
Object item = collection.get(position);
if(holder instanceof tidurViewHolder){
((tidurViewHolder) holder).setViewData((Story) item, holder.getAdapterPosition());
}
if(holder instanceof yukulViewHolder){
((yukulViewHolder) holder).viewDataYukul((YukulModel) item, holder.getAdapterPosition());
}
}
@Override
public int getItemCount() {
return collection.size();
}
@Override
public int getItemViewType(int position){
Object item = collection.get(position);
if(item instanceof Story) {
return VIEW_TYPE_TIDUR;
}
if(item instanceof YukulModel){
return VIEW_TYPE_YUKUL;
}
return -1;
}
}
答案 1 :(得分：1)
您需要检查适配器中如何覆盖getItemViewType（）和getItemCount（）方法。
@Override
public int getItemCount() {
if(storyList== null) {
return yukulList.size();
}
else if(storyList != null) {
return storyList.size();
}
if(yukulList==null) {
return storyList.size();
}
else {
return yukulList.size();
}
}
@Override
public int getItemViewType(int position){
if(storyList != null && storyList.size() > 0){
return VIEW_TYPE_TIDUR;
}
if(yukulList != null && yukulList.size() > 0){
return VIEW_TYPE_YUKUL;
}
return -1;
}
在getItemViewType（）的实现中，如果有任何storyList数据，则只会在recyclerView中显示该数据，因为对于传递给该方法的每个位置值，都会返回VIEW_TYPE_TIDUR。除非storyList数据为null或为空，否则程序流将永远不会达到yukulList的条件检查。
因此，在您的getItemViewType（）实现中，您需要确定要在传递给方法的位置显示的项目类型，并相应地返回VIEW_TYPE_TIDUR或VIEW_TYPE_YUKUL。
在getItemCount（）的实现中，您仅返回一种类型的大小。您应该返回storyList和yukulList大小的总计数。