切换状态更改在首次单击时不起作用

Question

如果我改变了任何开关状态，DatabaseReference第一次没有从前一个值改变...如果我再次改变相同的开关状态它会完美地工作。这是我的代码：

public sigAdapter(Context context, String[] web, Integer[] imageId) {
    super(context, R.layout.list, web);
    this.context = context;
    this.web = web;
    this.imageId = imageId;
}

@Override
public View getView(final int position, View view, ViewGroup parent) {
    DatabaseReference databaseReference1 = database.getReference("data").child(web[position1].replace("/",""));
    databaseReference=databaseReference1.child("Switch");
    ViewHolder viewHolder=new ViewHolder();

    View listItemView = view;
    if (listItemView == null) {
        listItemView = LayoutInflater.from(getContext()).inflate(R.layout.list, parent, false);

        viewHolder.txtTitle = (TextView) listItemView.findViewById(R.id.text_view);
        viewHolder.imageView = (ImageView) listItemView.findViewById(R.id.image_view);
        viewHolder.switch1 = (Switch) listItemView.findViewById(R.id.switch_button);

        final ViewHolder finalViewHolder = viewHolder;
        viewHolder.switch1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                position1 = (Integer)v.getTag();
                finalViewHolder.switch1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                    @Override
                    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                        DatabaseReference databaseReference1=database.getReference("data").child(web[position1].replace("/",""));
                        DatabaseReference databaseReference2=databaseReference1.child("Switch");
                        if (isChecked){
                            databaseReference2.setValue("On");
                        }else {
                            databaseReference2.setValue("Off");
                        }
                    }
                });
            }
        });

        listItemView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder)listItemView.getTag();
    }

    viewHolder.switch1.setTag(position);
    viewHolder.txtTitle.setText(web[position]);
    viewHolder.imageView.setImageResource(imageId[position]);

    return listItemView;
}

Answer 1

因为您在OnCheckedChangeListener中设置了OnClickListener;所以onCheckChanged()方法只有在第一次点击后才会被称为（ on 第一次点击）。

只需从头开始使用OnCheckedChangeListener。

viewHolder.switch1 = (Switch) listItemView.findViewById(R.id.switch_button);

switch1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        position1 = (Integer) buttonView.getTag();

        DatabaseReference databaseReference1 = database.getReference("data").child(web[position1].replace("/",""));
        DatabaseReference databaseReference2 = databaseReference1.child("Switch");

        if (isChecked){
            databaseReference2.setValue("On");
        } else {
            databaseReference2.setValue("Off");
        }
    }
}