Question

所以我在主活动中有一个包含切换按钮的列表视图我想初始化并使用切换按钮我知道的是，我应该在我的onView中的getView ...中初始化它，因为它在listview中但是我是否在onCreate或getView中设置它我得到一个空指针异常指向我的行toggle.setOnCheckedChangeListener（new CompoundButton.OnCheckedChangeListener（）{..我做错了什么

 @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View row = convertView;
        ViewHolder holder = null;
        if(row==null || row.getTag()==null){
            LayoutInflater inflater = LayoutInflater.from(activity);
            row = inflater.inflate(layoutResource,null);
            holder=new ViewHolder();

            holder.mTitle=(TextView)row.findViewById(R.id.name);
            holder.mDate=(TextView)row.findViewById(R.id.dateText);
            holder.mTime=(TextView)row.findViewById(R.id.timeText);

            row.setTag(holder);
        }else{
            holder = (ViewHolder)row.getTag();
        }



        holder.myAlarm = getItem(position);
        holder.mTitle.setText(holder.myAlarm.getTitle());
        holder.mDate.setText(holder.myAlarm.getMonth()+" "+holder.myAlarm.getDay()+", "+holder.myAlarm.getYear());

        ToggleButton toggle = (ToggleButton) findViewById(R.id.toggleButton);
        toggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    Toast.makeText(MainActivity.this, "IT IS CHECKED", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(MainActivity.this, "IT IS NOT CHECKED", Toast.LENGTH_SHORT).show();
                }
            }
        });

 return row;
 }

任何帮助都将非常感激

Answer 1

您的切换按钮是否包含在listview的每一行？如果那不是使用这个

ToggleButton toggle = (ToggleButton) findViewById(R.id.toggleButton);

使用此

holder.toggle = (ToggleButton) row.findViewById(R.id.toggleButton);

listview切换按钮单击以停止不同类的alarmManager

1 个答案: