java - 无法同时检索内容和 postId

Question

我设法在我的回收站视图中显示用户的帖子。现在我想通过点击在另一个活动上打开这篇文章。然后我希望能够对这篇文章发表评论。

所以我试图编写这个程序。

我的代码中的问题是，当我尝试将 PostId 指向活动时，帖子的内容不再发送到此活动，因此活动上不会显示任何内容。此代码无法将帖子 ID 和帖子内容发送到我的活动（请参阅代码中的注释）。

我应该如何设计可以接收帖子内容和帖子ID的代码？

这是我的适配器：

public class PostAdapter extends RecyclerView.Adapter<PostAdapter.PostViewHolder>{

    List<Post> list;
    Activity context;
    FirebaseFirestore firebaseFirestore;
    FirebaseAuth firebaseAuth;

    public PostAdapter(Activity context, List<Post> list){
        this.list = list;
        this.context = context;
    }

    public void initViews(){
        firebaseAuth = FirebaseAuth.getInstance();
        firebaseFirestore = FirebaseFirestore.getInstance();

    }


    @NonNull
    @Override
    public PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.each_post, parent, false);
        initViews();
        return new PostViewHolder(view);
    }


    @Override
    public void onBindViewHolder(@NonNull PostViewHolder holder, int position) {
        Post post = list.get(position);
        holder.setpostContent(post.getContent());

        long milliseconds = post.getTime().getTime();
        String date = DateFormat.format("MM/dd/yyyy", new Date(milliseconds)).toString();
        holder.setDate(date);

        String userId = post.getUser();
        firebaseFirestore.collection("Users").document(userId).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                if(task.isSuccessful()){
                    String user = task.getResult().getString("name");

                    holder.setUser(user);
                }else{
                    Toast.makeText(context,  task.getException().toString(), Toast.LENGTH_SHORT).show();
                }

            }

        });

        //Here i tried to intent the postId to my new Activity

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

                Intent intent = new Intent(context, OpenNewPostActivity.class);
                String postId = post.PostId;
                intent.putExtra("postid", postId);
                context.startActivity(intent);

            }
        });

    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    public class PostViewHolder extends RecyclerView.ViewHolder{

        public TextView postTime, postContent, username;
        View view;

        public PostViewHolder(@NonNull View itemView) {
            super(itemView);
            view = itemView;
            view.setOnClickListener(v -> openPost());
        }

        public void setpostContent(String content){
            postContent = view.findViewById(R.id.tv_new_post_text);
            postContent.setText(content);
        }

        public void setDate(String time){
            postTime = view.findViewById(R.id.tv_new_post_time);
            postTime.setText(time);
        }
        public void setUser(String user){
            username = view.findViewById(R.id.tv_new_post_username);
            username.setText(user);
        }
        public void getConstraintLayout(){
            postLayout = view.findViewById(R.id.post_layout);
        }


       //Here i wanted to sent the content of the post to my new activity so i can display it on my new activity but it is not working. 

        public void openPost(){

            int position = getAdapterPosition();

            Bundle bundle = new Bundle();
            bundle.putString("content", postContent.getText().toString());
            bundle.putString("username", username.getText().toString());
            bundle.putString("time", postTime.getText().toString());

            Intent intent = new Intent(context, OpenNewPostActivity.class);
            intent.putExtras(bundle);
            context.startActivity(intent);
        }


    }

}

这是我的活动

public class OpenNewPostActivity extends AppCompatActivity {

    private String postUserName, postTime, postContent;
    private TextView userName, time, content;
    private EditText comment;
    private String postId, currentUser;
    private ImageView addComment;
    private FirebaseAuth firebaseAuth;
    private FirebaseFirestore firebaseFirestore;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_open_post);

        initViews();
        intiClickListener();
        setPostContent();
    }

    private void initViews(){
        userName = findViewById(R.id.tv_open_new_post_username);
        time = findViewById(R.id.tv_open_new_post_time);
        content = findViewById(R.id.tv_open_new_post_text);
        addComment = findViewById(R.id.img_open_add_comment);
        comment = findViewById(R.id.et_open_comment);
        firebaseAuth = FirebaseAuth.getInstance();
        firebaseFirestore = FirebaseFirestore.getInstance();
        currentUser = firebaseAuth.getCurrentUser().getUid();

        //Here i receive the post id, so i want to add the comments to the specific post.

        postId = getIntent().getStringExtra("postid");

    }
    private void intiClickListener(){
        addComment.setOnClickListener(v -> addNewComment());
    }

    private void setPostContent(){

        // Here i replaced the content, but the textviews are not filled with the content of the post and I don't know why

        Bundle bundle = getIntent().getExtras();
        postUserName = bundle.getString("username");
        postTime = bundle.getString("time");
        postContent = bundle.getString("content");

        userName.setText(postUserName);
        time.setText(postTime);
        content.setText(postContent);
    }
    private void addNewComment(){
        String newComment = comment.getText().toString();

        if(newComment.isEmpty()){
            Toast.makeText(this, "Bitte fügen Sie ein Kommentar hinzu!", Toast.LENGTH_SHORT).show();
        }

        Map<String, Object> commentMap = new HashMap<>();
        commentMap.put("comment", newComment);
        commentMap.put("time", FieldValue.serverTimestamp());
        commentMap.put("user", currentUser);

        firebaseFirestore.collection("Posts/" + postId + "/Comments").add(commentMap).addOnCompleteListener(new OnCompleteListener<DocumentReference>() {
            @Override
            public void onComplete(@NonNull Task<DocumentReference> task) {
             if(task.isSuccessful()){
                 Toast.makeText(OpenNewPostActivity.this, "Kommentar wird hinzugefügt!", Toast.LENGTH_SHORT).show();
                 comment.setText("");
             }else{
                 Toast.makeText(OpenNewPostActivity.this, task.getException().getMessage(), Toast.LENGTH_SHORT).show();

             }
            }
        });

    }

}

标签： javaandroidfirebase