Question

在我的代码中我只使用了两个listview和两个CustomAdapter用于这两个listView，其中第一个listview是通过CustomAdapter实现的，从这个CustomAdapter我只想调用另一个（Activity / Other自定义适配器用于第二个listview）.It给出像

这样的例外

java.lang.IllegalStateException：无法使用的系统服务 onCreate（）之前的活动

private LayoutInflater mInflater;
    ViewFlipper vfWall;
    ImageView ivComments;
    TextView tvComments;
    ListView lvComments;
    WallCustom2 adapterForComments;
    ImageDownloader imageDownloader = new ImageDownloader();
    private static final String[] URLS = 
     {
      "http://lh5.ggpht.com/_mrb7w4gF8Ds/TCpetKSqM1I/AAAAAAAAD2c/Qef6Gsqf12Y/s144-c/_DSC4374%20copy.jpg",
    };
    String[] itms={"hey dude kya kar raha hai.........."};

    public WallCustom(Context context,ViewFlipper vfWall,ImageView ivComments,TextView tvComments,ListView lvComments)
    {
        this.ivComments=ivComments;
        this.tvComments=tvComments;
        this.lvComments=lvComments;
        this.mInflater = LayoutInflater.from(context);
        this.vfWall=vfWall;
    }

    public int getCount() 
    {
        return  URLS.length;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        final ViewHolder holder;
        if (convertView == null) 
        {
            convertView = mInflater.inflate(R.layout.wallcustom, null);
            holder = new ViewHolder();
            holder.Image = (ImageView) convertView.findViewById(R.id.ivImageWallCustom);
            holder.Message= (TextView) convertView.findViewById(R.id.tvMessageWallCustom);
            holder.comments= (TextView) convertView.findViewById(R.id.tvExtraWallCustom);
            convertView.setTag(holder);
        } 
        else 
        {
            holder = (ViewHolder) convertView.getTag();
        }

         if(imageDownloader.download(URLS[position],holder.Image)!=null)
         {
             holder.Image.setImageBitmap( imageDownloader.download(URLS[position],holder.Image));
         }
        holder.Message.setText("hey dude kya kar raha hai..........");
        holder.comments.setText("Comments ");

        holder.comments.setOnClickListener(new View.OnClickListener() 
        {
            public void onClick(View v) 
            {
                 if(imageDownloader.download(URLS[position],ivComments)!=null)
                 {
                     ivComments.setImageBitmap( imageDownloader.download(URLS[position],ivComments));
                 }
                 tvComments.setText(itms[position]);
                 Wall wallobj=new Wall();
                adapterForComments=wallobj.ListViewForComments(); // gives object of second custom adapter
                lvComments.setAdapter(adapterForComments); // lvComments my second list view in which i want to set second custom adapter
                 vfWall.showNext();
            }
        });

        return convertView;
    }

    class ViewHolder 
    {
        ImageView Image;
        TextView Message;
        TextView comments;
    }

Answer 1

java.lang.IllegalStateException: System services not available to Activities before onCreate()

该错误消息非常简单。您正尝试从活动的构造函数或初始值设定项中使用系统服务，例如LayoutInflater。最早在LayoutInflater之前不要尝试使用onCreate()。

Answer 2

您可能正在使用无法使用的systemServide（InflaterService），直到调用oncreate（）事件。所以控制台错误信息很容易理解。

从自定义适配器调用其他活动/自定义适配器

2 个答案: