android - 如何在 android firebase 聊天中显示打字指示器

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Answer 1

请检查下面的代码:`

使结构类似于:(它可能会根据您的需要而有所不同，我只是向您介绍一些东西)

I have an object "isTyping" with Two Keys Let's say "first_user" and "second_user". If you want to check for "second_user" is typing or not this should be the code.

  private void checkForOtherUserTypingStatus() {
        mMessageThread.child("isTyping").addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {
                if (dataSnapshot.getKey().equalsIgnoreCase("second_user") && dataSnapshot.getValue().toString().equals("true")) {
                    updateTypingViewVisibility(true);
                } else if (dataSnapshot.getKey().equalsIgnoreCase("second_user") && dataSnapshot.getValue().toString().equals("false")) {
                    updateTypingViewVisibility(false);
                }
            }

            @Override
            public void onChildChanged(DataSnapshot dataSnapshot, String s) {
                if (dataSnapshot.getValue() != null) {
                    if (dataSnapshot.getKey().equalsIgnoreCase("second_user") && dataSnapshot.getValue().toString().equals("true")) {
                        updateTypingViewVisibility(true);
                    } else if (dataSnapshot.getKey().equalsIgnoreCase("second_user") && dataSnapshot.getValue().toString().equals("false")) {
                        updateTypingViewVisibility(false);
                    }
                }
            }

            @Override
            public void onChildRemoved(DataSnapshot dataSnapshot) {

            }

            @Override
            public void onChildMoved(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });
    }

To update value of "isTyping" > "first_user" (assume that you are typing)

 mBinder.etChatMessage.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {


                Map<String, Object> params = new HashMap<>();
                params.put("first_user", charSequence.length() > 0);
                mMessageThread.child("isTyping").updateChildren(params);
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });