背上的键，我想从适配器上进行活动

Question

我有一个与适配器连接的活动。在活动中，我包括适配器布局。当我单击按钮时，适配器布局将打开，但是当我在适配器布局中按后退按钮时，将自动达到主要活动。我要在适配器中按后退按钮而不是上一个活动。

下面是活动代码

public class TestFragment extends Fragment  {
private Button btnA, btnB, btnC, btnD, btnSubmit, btnNext, btnPrev, btnFlag;
private TextView tvQuestion, tvLayout;
private int totalItem;
private int listItem = 0;
private ArrayList<mcqQuestion> quesList = new ArrayList<>();
private int score = 0;
private boolean isLoading = true;
private RelativeLayout rlMcqProgress;
private FirebaseAuth mAuth;
private boolean allAnswered = false;
private RecyclerView rvQuesLayout;
private RecyclerView.LayoutManager layoutManager;
private QuestionLayoutRecyclerAdapter adapter;
private LinearLayout llQuestionAll;
private FirebaseDatabase database = FirebaseDatabase.getInstance();
private DatabaseReference myRef = database.getReference("tax").child("Questions");
public TestFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
 Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_test, container, false);
btnA = view.findViewById(R.id.btn_mcq_A);
btnB = view.findViewById(R.id.btn_mcq_B);
btnC = view.findViewById(R.id.btn_mcq_C);
btnD = view.findViewById(R.id.btn_mcq_D);
btnSubmit = view.findViewById(R.id.btn_mcq_submit);
btnNext = view.findViewById(R.id.btn_mcq_next);
btnPrev = view.findViewById(R.id.btn_mcq_prev);
btnFlag = view.findViewById(R.id.btn_mcq_flag);
tvQuestion = view.findViewById(R.id.tv_mcq_question);
tvLayout = view.findViewById(R.id.tv_mcq_question_layout);
rvQuesLayout = view.findViewById(R.id.rv_layout_question_test);
rlMcqProgress = view.findViewById(R.id.rl_mcq_progress);
rlMcqProgress.setVisibility(View.VISIBLE);
llQuestionAll=view.findViewById(R.id.ll_test_all);
mAuth = FirebaseAuth.getInstance();
getFData();
btnA.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
quesList.get(listItem).setSelAnswer("optA");
setButtonColor();
btnA.setBackgroundResource(R.color.sky_blue);
}
});
btnB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
quesList.get(listItem).setSelAnswer("optB");
setButtonColor();
btnB.setBackgroundResource(R.color.sky_blue);
}
});
btnC.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
quesList.get(listItem).setSelAnswer("optC");
setButtonColor();
btnC.setBackgroundResource(R.color.sky_blue);
}
});
btnD.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
quesList.get(listItem).setSelAnswer("optD");
setButtonColor();
btnD.setBackgroundResource(R.color.sky_blue);
}
});
btnFlag.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setFlagValue();
setFlagColor();
}
});
tvLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
adapter.notifyDataSetChanged();
if (rvQuesLayout.getVisibility() == View.GONE || rvQuesLayout.getVisibility() == View.INVISIBLE) {
rvQuesLayout.setVisibility(View.VISIBLE);
llQuestionAll.setVisibility(View.GONE);
} else {
rvQuesLayout.setVisibility(View.GONE);
llQuestionAll.setVisibility(View.VISIBLE);
}
}
});
btnNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
displayNextQues();
}
});
btnPrev.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
displayPrevQues();
}
});
btnSubmit.setOnClickListener(new View.OnClickListener() {
@SuppressLint("SetTextI18n")
@Override
public void onClick(View v) {
for (int i = 0; i < totalItem; i++) {
if (quesList.get(i).getSelAnswer().equals("none")) {
allAnswered = false;
score++;
break;
} else {
if (quesList.get(i).getSelAnswer().equals(quesList.get(i).getAnswer())) {
score++;
}
allAnswered = true;
}
}
if (allAnswered) {
Intent intent = new Intent(this,finalresult.class);
intent.putExtra("score" , score);
intent.putExtra("questions" , totalItem);
startActivity(intent);
} else {
Toast.makeText(this, "Answer all the questions", Toast.LENGTH_SHORT).show();
}

}
});
return view;
}
private void makeRecyclerView() {
layoutManager = new LinearLayoutManager(this);
//rvQuesLayout.setHasFixedSize(true);
rvQuesLayout.setLayoutManager(layoutManager);
adapter = new QuestionLayoutRecyclerAdapter(quesList);
rvQuesLayout.setAdapter(adapter);
adapter.setOnItemClickListner(new QuestionLayoutRecyclerAdapter.onItemClickListner() {
@Override
public void onClick(int pos) {
listItem=pos;
if(listItem>=0 && listItem<totalItem){
makeAllDisplay();
rvQuesLayout.setVisibility(View.GONE);
llQuestionAll.setVisibility(View.VISIBLE);
}
}
});
}
private void setDisplay(int item) {
btnA.setText(quesList.get(item).getOptA());
btnB.setText(quesList.get(item).getOptB());
btnC.setText(quesList.get(item).getOptC());
btnD.setText(quesList.get(item).getOptD());
tvQuestion.setText(quesList.get(item).getQuestion());


}
private void getFData() {
myRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot messageSnapshot : dataSnapshot.getChildren()) {
String qtext = (String) messageSnapshot.child("qText").getValue();
String optA = (String) messageSnapshot.child("optA").getValue();
String optB = (String) messageSnapshot.child("optB").getValue();
String optC = (String) messageSnapshot.child("optC").getValue();
String optD = (String) messageSnapshot.child("optD").getValue();
String answer = (String) messageSnapshot.child("answer").getValue();
quesList.add(new mcqQuestion(qtext, optA, optB, optC, optD, answer, "none", false));
Log.d("TOTAL ITEM", String.valueOf(quesList.size()));

}
totalItem = quesList.size();
isLoading = false;
if (!isLoading) {
setDisplay(listItem);
rlMcqProgress.setVisibility(View.GONE);
tvLayout.setVisibility(View.VISIBLE);
}
makeRecyclerView();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {

}
});
}

private void setFlagValue(){
if (quesList.get(listItem).isFlag()) {
quesList.get(listItem).setFlag(false);
} else {
 quesList.get(listItem).setFlag(true);
}
}
private void setFlagColor(){
if (quesList.get(listItem).isFlag()) {
btnFlag.setBackgroundColor(ContextCompat.getColor(Objects.requireNonNull(this), R.color.black));
btnFlag.setTextColor(ContextCompat.getColor(Objects.requireNonNull(this), R.color.grey));
} else {
btnFlag.setBackgroundColor(ContextCompat.getColor(Objects.requireNonNull(this), R.color.grey_light));
btnFlag.setTextColor(ContextCompat.getColor(Objects.requireNonNull(this), R.color.grey));
}
}
private void setButtonColor() {
btnA.setBackgroundResource(R.color.grey_light);
btnB.setBackgroundResource(R.color.grey_light);
btnC.setBackgroundResource(R.color.grey_light);
btnD.setBackgroundResource(R.color.grey_light);
}
private void displayNextQues() {
if (listItem < totalItem - 1) {
listItem++;
makeAllDisplay();
} else {
btnNext.setVisibility(View.GONE);
btnSubmit.setVisibility(View.VISIBLE);
}
}
private void makeAllDisplay(){
setDisplay(listItem);
setButtonColor();
setFlagColor();
switch (quesList.get(listItem).getSelAnswer()) {
case "optA":
btnA.setBackgroundResource(R.color.sky_blue);
break;
case "optB":
btnB.setBackgroundResource(R.color.sky_blue);
break;
case "optC":
btnC.setBackgroundResource(R.color.sky_blue);
break;
case "optD":
btnD.setBackgroundResource(R.color.sky_blue);
break;
default:
setButtonColor();
break;
}
}
private void displayPrevQues() {
btnNext.setVisibility(View.VISIBLE);
if (listItem > 0 && listItem < totalItem) {
listItem--;
makeAllDisplay();
} else {
Toast.makeText(this, "Cannot GO back!!", Toast.LENGTH_SHORT).show();
}
}
}

并且适配器代码在下面

public class QuestionLayoutRecyclerAdapter extends RecyclerView.Adapter<QuestionLayoutRecyclerAdapter.FlagViewHolder> {
private ArrayList<mcqQuestion> quesList;
private onItemClickListner onItemClickListner;
public void setOnItemClickListner(QuestionLayoutRecyclerAdapter.onItemClickListner onItemClickListner) {
this.onItemClickListner = onItemClickListner;
}
public interface onItemClickListner {
void onClick(int pos);//pass your object types.
}
public QuestionLayoutRecyclerAdapter(ArrayList<mcqQuestion> quesList) {
this.quesList = quesList;
}
@NonNull
@Override
public FlagViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(layout.question_layout, parent, false);
FlagViewHolder flagViewHolder = new FlagViewHolder(view, quesList);
return flagViewHolder;
}
@SuppressLint("ResourceAsColor")
@Override
public void onBindViewHolder(@NonNull final FlagViewHolder holder, int position) {
mcqQuestion question_id = quesList.get(position);
holder.tvQuestionNumber.setText("Question " + (position + 1));
if (question_id.isFlag()) {
holder.ivFlag.setImageResource(drawable.right2);
} else {
holder.ivFlag.setImageResource(drawable.white2);
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemClickListner.onClick(holder.getAdapterPosition());
}
});
}
@Override
public int getItemCount() {
return quesList.size();
}
public static class FlagViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ImageView ivFlag;
TextView tvQuestionNumber;
ArrayList<mcqQuestion> quesList;
public FlagViewHolder(@NonNull View itemView, ArrayList<mcqQuestion> quesList) {
super(itemView);
ivFlag = itemView.findViewById(id.iv_layout_flag);
tvQuestionNumber = itemView.findViewById(id.tv_layout_question_number);
itemView.setOnClickListener(this);
this.quesList = quesList;
}
@Override
public void onClick(View v) {
int quesClick = getAdapterPosition();
}
}
}

Answer 1

将其添加到bindViewHolder中