在EditText中检索和显示Firebase数据，并再次保存编辑内容

implementation 'com.google.firebase:firebase-database:20.0.0'

EditText editText = findViewById(R.id.editText);

FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference myRef = database.getReference("your_data_reference");

myRef.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        String data = dataSnapshot.getValue(String.class);
        editText.setText(data);
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {
        // 处理取消操作的逻辑
    }
});

editText.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
        // 不需要实现
    }

    @Override
    public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
        // 不需要实现
    }

    @Override
    public void afterTextChanged(Editable editable) {
        String newData = editable.toString();
        myRef.setValue(newData);
    }
});