Java 如何将所有RecyclerView项目背景设置为灰色？
当IJava 如何将所有RecyclerView项目背景设置为灰色？,java,android,android-recyclerview,Java,Android,Android Recyclerview,当ILog.I（“adapterPos”，String.valueOf（adapter.adapterPos））时更新在onsweep中，即使在将其设置为-1之前，它也会返回-1 我有一个recyclerView，还有一个自定义适配器，用于显示有关练习的信息 当用户点击recyclerView项目时，项目背景设置为绿色，保存按钮变为更新按钮，以便用户可以更新其现有录制的练习 我还有一个在片段中实现的onsweep方法。当用户滑动项目时，它将从数据库中删除 当用户滑动以删除项目时，我希望将所有项
Log.I（“adapterPos”，String.valueOf（adapter.adapterPos））时更新recyclerView自定义适配器@覆盖
已单击的公共无效OneXercise（内部位置）{
如果（recyclerItemClicked==false）{
saveBtn.setText（“更新”）；
clearBtn.setVisibility（View.GONE）；
recyclerItemClicked=true；
双击重量=适配器。获取重量（位置）；
String selectedWeightString=Double.toString（selectedWeight）；
editTextWeight.setText（selectedWeightString）；
int selectedReps=adapter.getReps（位置）；
String selectedrepstring=Integer.toString（selectedReps）；
editTextReps.setText（SelectedRepString）；
}否则{
clearBtn.setVisibility（View.VISIBLE）；
saveBtn.setText（“保存”）；
recyclerItemClicked=false；
}
}
public void initRecyclerView（）{
适配器=新完成的exerciseslistadapter2（allExercises，this）；
recyclerView.setAdapter（适配器）；
新建ItemTouchHelper（itemTouchHelperCallback）.attachToRecyclerView（recyclerView）；
}
公开练习（列表练习）{
allExercises.clear（）；
allExercises.addAll（练习）；
}
ItemTouchHelper.SimpleCallback itemTouchHelperCallback=新建ItemTouchHelper.SimpleCallback（0，ItemTouchHelper.RIGHT | ItemTouchHelper.LEFT）{
@凌驾
公共布尔onMove（@NonNull RecyclerView RecyclerView，@NonNull RecyclerView.ViewHolder ViewHolder，@NonNull RecyclerView.ViewHolder target）{
返回false；
}
@凌驾
公共void onsweed（@NonNull RecyclerView.ViewHolder ViewHolder，int-direction）{
int logID=allExercises.get（viewHolder.getAdapterPosition（））.getLog_id（）；
logViewModel.deleteByID（logID）；
clearBtn.setVisibility（View.VISIBLE）；
saveBtn.setText（“保存”）；
Log.i（“adapterPos”，String.valueOf（adapter.adapterPos））；//由于某些原因，它始终是-1
//备份当前选定的位置
int selectedPos=adapter.adapterPos；
//将当前选择的位置更改为-1
adapter.adapterPos=-1；
adapter.notifyItemChanged（selectedPos）；
}
};
public class CompletedExercisesListAdapter2 extends RecyclerView.Adapter {
private OnExerciseClickListener onExerciseClickListener;
private List<Log_Entries> allCompletedExercises = new ArrayList<>();
public int adapterPos = -1;
public boolean isSelected = false;
public CompletedExercisesListAdapter2(ArrayList<Log_Entries> allCompletedExercises, OnExerciseClickListener onExerciseClickListener) {
this.allCompletedExercises = allCompletedExercises;
this.onExerciseClickListener = onExerciseClickListener;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View view;
if (viewType == 0) {
view = layoutInflater.inflate(R.layout.new_completed_exercise_item, parent, false);
return new ViewHolderOne(view, onExerciseClickListener);
}
view = layoutInflater.inflate(R.layout.completed_exercise_item, parent, false);
return new ViewHolderTwo(view, onExerciseClickListener);
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
if (getItemViewType(position) == 0) {
ViewHolderOne viewHolderOne = (ViewHolderOne) holder;
if (adapterPos == position) {
viewHolderOne.relativeLayout.setBackgroundColor(Color.parseColor("#567845"));
}
else {
viewHolderOne.relativeLayout.setBackgroundResource(R.color.dark_grey);
}
viewHolderOne.textViewExerciseName.setText(String.valueOf(allCompletedExercises.get(position).getChildExerciseName()));
viewHolderOne.textViewSetNumber.setText(String.valueOf(viewHolderOne.getAdapterPosition() + 1));
viewHolderOne.textViewWeight.setText(String.valueOf(allCompletedExercises.get(position).getTotal_weight_lifted()));
viewHolderOne.textViewReps.setText(String.valueOf(allCompletedExercises.get(position).getReps()));
} else if (getItemViewType(position) == 1) {
ViewHolderTwo viewHolderTwo = (ViewHolderTwo) holder;
if (adapterPos == position) {
viewHolderTwo.relativeLayout.setBackgroundColor(Color.parseColor("#567845"));
} else {
viewHolderTwo.relativeLayout.setBackgroundResource(R.color.dark_grey);
}
viewHolderTwo.textViewSetNumber.setText(String.valueOf(viewHolderTwo.getAdapterPosition() + 1));
viewHolderTwo.textViewWeight.setText(String.valueOf(allCompletedExercises.get(position).getTotal_weight_lifted()));
viewHolderTwo.textViewReps.setText(String.valueOf(allCompletedExercises.get(position).getReps()));
}
}
@Override
public int getItemCount() {
return allCompletedExercises.size();
}
@Override
public int getItemViewType(int position) {
// if list is sorted chronologically
if (position == 0) {
return 0;
}
if (allCompletedExercises.get(position).getChildExerciseName().equals(allCompletedExercises.get(position - 1).getChildExerciseName())) {
return 1;
} else {
return 0;
}
}
public class ViewHolderOne extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView textViewExerciseName;
private TextView textViewSetNumber;
private TextView textViewWeight;
private TextView textViewReps;
OnExerciseClickListener mOnExerciseClickListener;
private RelativeLayout relativeLayout;
public ViewHolderOne(@NonNull View itemView, OnExerciseClickListener onExerciseClickListener) {
super(itemView);
textViewExerciseName = itemView.findViewById(R.id.textView_ExerciseName3);
textViewSetNumber = itemView.findViewById(R.id.textView_Set_Number56);
textViewWeight = itemView.findViewById(R.id.textView_weight78);
textViewReps = itemView.findViewById(R.id.textView_repss0);
mOnExerciseClickListener = onExerciseClickListener;
relativeLayout = (RelativeLayout) itemView.findViewById(R.id.exercise_item_relative);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
onExerciseClickListener.onExerciseClicked(getAdapterPosition());
if (isSelected) {
adapterPos = -1;
isSelected = false;
} else {
adapterPos = getAdapterPosition();
isSelected = true;
}
notifyDataSetChanged();
}
}
class ViewHolderTwo extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView textViewSetNumber;
private TextView textViewWeight;
private TextView textViewReps;
OnExerciseClickListener mOnExerciseClickListener;
private RelativeLayout relativeLayout;
public ViewHolderTwo(@NonNull View itemView, OnExerciseClickListener onExerciseClickListener) {
super(itemView);
textViewSetNumber = itemView.findViewById(R.id.textView_Set_Number);
textViewWeight = itemView.findViewById(R.id.textView_weight);
textViewReps = itemView.findViewById(R.id.textView_repss);
relativeLayout = (RelativeLayout) itemView.findViewById(R.id.exercise_item_rel);
mOnExerciseClickListener = onExerciseClickListener;
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
onExerciseClickListener.onExerciseClicked(getAdapterPosition());
if (!isSelected) {
adapterPos = getAdapterPosition();
isSelected = true;
} else {
adapterPos = -1;
isSelected = false;
}
notifyDataSetChanged();
}
}
public interface OnExerciseClickListener {
void onExerciseClicked(int position);
}
public double getWeight(int position) {
double weight = allCompletedExercises.get(position).getTotal_weight_lifted();
return weight;
}
public int getReps(int position) {
int reps = allCompletedExercises.get(position).getReps();
return reps;
}
}
public类CompletedExercisesListAdapter2扩展了RecyclerView.Adapter{
私用一台XerciseClickListener一台XerciseClickListener；
private List allCompletedExercises=new ArrayList（）；
公共int adapterPos=-1；
公共布尔值isSelected=false；
public CompletedExercisesListAdapter2（数组列出所有已完成的练习，一个XerciseClickListener一个XerciseClickListener）{
this.allCompletedExercises=allCompletedExercises；
this.onExerciseClickListener=onExerciseClickListener；
}
@非空
@凌驾
public RecyclerView.ViewHolder onCreateViewHolder（@NonNull ViewGroup父级，int-viewType）{
LayoutInflater LayoutInflater=LayoutInflater.from（parent.getContext（））；
视图；
如果（viewType==0）{
视图=布局更平坦。充气（R.layout.new\u completed\u exercise\u item，parent，false）；
返回新的ViewHolderOne（视图，onExerciseClickListener）；
}
视图=布局更平坦。充气（R.layout.completed\u exercise\u item，parent，false）；
返回新的ViewHolderTwo（视图，一个XerciseClickListener）；
}
@凌驾
public void onBindViewHolder（@NonNull RecyclerView.ViewHolder，int位置）{
如果（getItemViewType（位置）==0）{
ViewHolderOne ViewHolderOne=（ViewHolderOne）支架；
if（适配器端口==位置）{
viewHolderOne.relativeLayout.setBackgroundColor（Color.parseColor（“#567845”）；
}
否则{
viewHolderOne.relativeLayout.setBackgroundResource（R.颜色.深灰色）；
}
viewHolderOne.textViewExerciseName.setText（String.valueOf（allCompletedExercises.get（position.getChildExerciseName（））；
viewHolderOne.textViewSetNumber.setText（String.valueOf（viewHolderOne.getAdapterPosition（）+1））；
viewHolderOne.textViewWeight.setText（String.valueOf（allCompletedExercises.get（position.getTotal_weight_lifted（））；
viewHolderOne.textViewReps.setText（String.valueOf（allCompletedExercises.get（position.getReps（）））；
}else if（getItemViewType（position）==1）{
ViewHolderTwo ViewHolderTwo=（ViewHolderTwo）支架；
if（适配器端口==位置）{
viewHolderTwo.relativeLayout.setBackgroundColor（Color.parseColor（“#567845”）；
}否则{
VIEWHOLDERTW.相对年轻人.挫折背景资源（R.颜色.深灰色）；
}
viewHolderTwo.textViewSetNumber.setText（String.valueOf（viewHolderTwo.getAdapterPosition（）+1））；
viewHolderTwo.textViewWeight.setText（String.valueOf（所有已完成的练习）get（位置）.getTotal_w
public class CompletedExercisesListAdapter2 extends RecyclerView.Adapter {
private OnExerciseClickListener onExerciseClickListener;
private List<Log_Entries> allCompletedExercises = new ArrayList<>();
public int adapterPos = -1;
public boolean isSelected = false;
public CompletedExercisesListAdapter2(ArrayList<Log_Entries> allCompletedExercises, OnExerciseClickListener onExerciseClickListener) {
this.allCompletedExercises = allCompletedExercises;
this.onExerciseClickListener = onExerciseClickListener;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
View view;
if (viewType == 0) {
view = layoutInflater.inflate(R.layout.new_completed_exercise_item, parent, false);
return new ViewHolderOne(view, onExerciseClickListener);
}
view = layoutInflater.inflate(R.layout.completed_exercise_item, parent, false);
return new ViewHolderTwo(view, onExerciseClickListener);
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
if (getItemViewType(position) == 0) {
ViewHolderOne viewHolderOne = (ViewHolderOne) holder;
if (adapterPos == position) {
viewHolderOne.relativeLayout.setBackgroundColor(Color.parseColor("#567845"));
}
else {
viewHolderOne.relativeLayout.setBackgroundResource(R.color.dark_grey);
}
viewHolderOne.textViewExerciseName.setText(String.valueOf(allCompletedExercises.get(position).getChildExerciseName()));
viewHolderOne.textViewSetNumber.setText(String.valueOf(viewHolderOne.getAdapterPosition() + 1));
viewHolderOne.textViewWeight.setText(String.valueOf(allCompletedExercises.get(position).getTotal_weight_lifted()));
viewHolderOne.textViewReps.setText(String.valueOf(allCompletedExercises.get(position).getReps()));
} else if (getItemViewType(position) == 1) {
ViewHolderTwo viewHolderTwo = (ViewHolderTwo) holder;
if (adapterPos == position) {
viewHolderTwo.relativeLayout.setBackgroundColor(Color.parseColor("#567845"));
} else {
viewHolderTwo.relativeLayout.setBackgroundResource(R.color.dark_grey);
}
viewHolderTwo.textViewSetNumber.setText(String.valueOf(viewHolderTwo.getAdapterPosition() + 1));
viewHolderTwo.textViewWeight.setText(String.valueOf(allCompletedExercises.get(position).getTotal_weight_lifted()));
viewHolderTwo.textViewReps.setText(String.valueOf(allCompletedExercises.get(position).getReps()));
}
}
@Override
public int getItemCount() {
return allCompletedExercises.size();
}
@Override
public int getItemViewType(int position) {
// if list is sorted chronologically
if (position == 0) {
return 0;
}
if (allCompletedExercises.get(position).getChildExerciseName().equals(allCompletedExercises.get(position - 1).getChildExerciseName())) {
return 1;
} else {
return 0;
}
}
public class ViewHolderOne extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView textViewExerciseName;
private TextView textViewSetNumber;
private TextView textViewWeight;
private TextView textViewReps;
OnExerciseClickListener mOnExerciseClickListener;
private RelativeLayout relativeLayout;
public ViewHolderOne(@NonNull View itemView, OnExerciseClickListener onExerciseClickListener) {
super(itemView);
textViewExerciseName = itemView.findViewById(R.id.textView_ExerciseName3);
textViewSetNumber = itemView.findViewById(R.id.textView_Set_Number56);
textViewWeight = itemView.findViewById(R.id.textView_weight78);
textViewReps = itemView.findViewById(R.id.textView_repss0);
mOnExerciseClickListener = onExerciseClickListener;
relativeLayout = (RelativeLayout) itemView.findViewById(R.id.exercise_item_relative);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
onExerciseClickListener.onExerciseClicked(getAdapterPosition());
if (isSelected) {
adapterPos = -1;
isSelected = false;
} else {
adapterPos = getAdapterPosition();
isSelected = true;
}
notifyDataSetChanged();
}
}
class ViewHolderTwo extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView textViewSetNumber;
private TextView textViewWeight;
private TextView textViewReps;
OnExerciseClickListener mOnExerciseClickListener;
private RelativeLayout relativeLayout;
public ViewHolderTwo(@NonNull View itemView, OnExerciseClickListener onExerciseClickListener) {
super(itemView);
textViewSetNumber = itemView.findViewById(R.id.textView_Set_Number);
textViewWeight = itemView.findViewById(R.id.textView_weight);
textViewReps = itemView.findViewById(R.id.textView_repss);
relativeLayout = (RelativeLayout) itemView.findViewById(R.id.exercise_item_rel);
mOnExerciseClickListener = onExerciseClickListener;
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
onExerciseClickListener.onExerciseClicked(getAdapterPosition());
if (!isSelected) {
adapterPos = getAdapterPosition();
isSelected = true;
} else {
adapterPos = -1;
isSelected = false;
}
notifyDataSetChanged();
}
}
public interface OnExerciseClickListener {
void onExerciseClicked(int position);
}
public double getWeight(int position) {
double weight = allCompletedExercises.get(position).getTotal_weight_lifted();
return weight;
}
public int getReps(int position) {
int reps = allCompletedExercises.get(position).getReps();
return reps;
}
}
// backup the currently selected position
int selectedPos = adapter.adapterPos;
// change the currently selected position to -1
adapter.adapterPos = -1;
adapter.isSelected = false;
adapter.notifyItemChanged(selectedPos);
@Override
public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
int logID = allExercises.get(viewHolder.getAdapterPosition()).getLog_id();
logViewModel.deleteByID(logID);
clearBtn.setVisibility(View.VISIBLE);
saveBtn.setText("Save");//<-- why if no item is selected?
// backup the currently selected position
//int selectedPos = adapter.adapterPos;<-- why would you do this, nothing is not shown as selected
// change the currently selected position to -1
adapter.adapterPos = -1;
adapter.notifyDataSetChanged();//now everything will be gray
}
@Override
public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
int copyOfAdapterPos=adapterPos;
adapterPos=-1;
notifyItemChanged(copyOfAdapterPos);
int logID = allExercises.get(viewHolder.getAdapterPosition()).getLog_id();
logViewModel.deleteByID(logID);
clearBtn.setVisibility(View.VISIBLE);
saveBtn.setText("Save");//<-- why if no item is selected?
adapter.notifyItemRemoved(viewHolder.getAdapterPosition());//now everything will be gray
}