Java 如何在Recycler视图中获取TextView并将其发送到另一个活动并将其添加到arraylist值

我无法在

RecyclerView

中获取每个文本视图，如“缺席”、“当前”和“原谅”，但

TextView

只有一个id。如何获取

RecyclerView

中的所有

TextView

。这是我的

活动

中的代码

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_adapter);
    final TextView dates,blocks;
    blocks=findViewById(R.id.blocks);
    dates=findViewById(R.id.dates);
    database =FirebaseDatabase.getInstance();
    submit=findViewById(R.id.sumbitBrn);
    final String block = getIntent().getExtras().getString("Block");
    final String date = getIntent().getExtras().getString("Date");
    blocks.setText(block);
    dates.setText(date);
    swipeRefreshLayout = findViewById(R.id.refresh);

    exampleList =  new ArrayList<>();
    values = new ArrayList<>();

    myReff = FirebaseDatabase.getInstance().getReference("Section").child(block);
    myReff.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
            for(DataSnapshot students:dataSnapshot.getChildren()){
                Students students1 = students.getValue(Students.class);
                exampleList.add(students1);
            }
        }   

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });



    mRecyclerView = findViewById(R.id.recyclerView);
    mRecyclerView.setHasFixedSize(true);
    mLayoutManager = new LinearLayoutManager(this);
    mAdapter = new ExampleAdapter(exampleList);
    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mAdapter);

    swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            mRecyclerView = findViewById(R.id.recyclerView);
            mRecyclerView.setHasFixedSize(true);
            mLayoutManager = new LinearLayoutManager(MainAdapter.this);
            mAdapter = new ExampleAdapter(exampleList);
            mRecyclerView.setLayoutManager(mLayoutManager);
            mRecyclerView.setAdapter(mAdapter);
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    swipeRefreshLayout.setRefreshing(false);
                }
            },4000);
        }
    });

    submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            myReff =database.getReference("Date").child(dates.getText().toString()).child(blocks.getText().toString());

            // I WILL INSERT HERE THE CODE FOR GETTING THE TEXTVIEWS INSIDE THE RECYCLER
            Toast.makeText(MainAdapter.this,"SUCCESS!",Toast.LENGTH_LONG).show();
        }
    });

这是我的应用程序的屏幕截图

这是我的

main活动

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_adapter);
    final TextView dates,blocks;
    blocks=findViewById(R.id.blocks);
    dates=findViewById(R.id.dates);
    database =FirebaseDatabase.getInstance();
    submit=findViewById(R.id.sumbitBrn);
    final String block = getIntent().getExtras().getString("Block");
    final String date = getIntent().getExtras().getString("Date");
    blocks.setText(block);
    dates.setText(date);
    swipeRefreshLayout = findViewById(R.id.refresh);

    exampleList =  new ArrayList<>();
    values = new ArrayList<>();

    myReff = FirebaseDatabase.getInstance().getReference("Section").child(block);
    myReff.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
            for(DataSnapshot students:dataSnapshot.getChildren()){
                Students students1 = students.getValue(Students.class);
                exampleList.add(students1);
            }
        }   

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });



    mRecyclerView = findViewById(R.id.recyclerView);
    mRecyclerView.setHasFixedSize(true);
    mLayoutManager = new LinearLayoutManager(this);
    mAdapter = new ExampleAdapter(exampleList);
    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mAdapter);

    swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            mRecyclerView = findViewById(R.id.recyclerView);
            mRecyclerView.setHasFixedSize(true);
            mLayoutManager = new LinearLayoutManager(MainAdapter.this);
            mAdapter = new ExampleAdapter(exampleList);
            mRecyclerView.setLayoutManager(mLayoutManager);
            mRecyclerView.setAdapter(mAdapter);
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    swipeRefreshLayout.setRefreshing(false);
                }
            },4000);
        }
    });

    submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            myReff =database.getReference("Date").child(dates.getText().toString()).child(blocks.getText().toString());

            // I WILL INSERT HERE THE CODE FOR GETTING THE TEXTVIEWS INSIDE THE RECYCLER
            Toast.makeText(MainAdapter.this,"SUCCESS!",Toast.LENGTH_LONG).show();
        }
    });

---

<>你可以考虑使用一个数组来保持你的代码中的数据跟踪。在适配器中，考虑创建一个数组，如下所示。p>

private int[] attendance = new int[list.size()]; // The idea is to initialize the array having the same size as your list 
private final int PRESENT = 0;
private final int ABSENT = 1;
private final int EXCUSE = 2;

现在在check listener中，将适当的值添加到数组中，以指示考勤的状态

holder.radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(RadioGroup radioGroup, int i) {
        switch (i){
            case R.id.present:
                holder.result.setText("Present");
                attendence[position] = PRESENT;
                break;
            case R.id.absent:
                holder.result.setText("Absent");
                attendence[position] = ABSENT;
                break;
            case R.id.excuse:
                holder.result.setText("Excuse");
                attendence[position] = EXCUSE;
                break;
            case default:
                holder.result.setText("Present");
                attendence[position] = PRESENT;
                break;
        }
    }
});

现在，在需要时将数组传递给下一个活动或类。希望有帮助