OkHTTP AndroidBaseAdapter 从数据到 ListView

Question

我已经设置 okhttp 从我的服务器下载数据并以普通文本视图显示。但我很想把它放到 ListView 中。

我知道我需要基本适配器和一些项目布局，我需要有关如何让它与 OKHTTP 一起工作的帮助。

这是我用来下载它的代码，如果您还需要什么，请评论。

public class TaskAktualnosci extends AsyncTask<String, Void, String> {

    protected String doInBackground(String... params) {
        try {
            //*OKHTTP ponoć parametry dodaje do buildera*
       //     RequestBody parametry = new FormBody.Builder()
        //            .add("offset", "0")
         //           .add("limit", "50")
          //          .build();

            OkHttpClient klient = new OkHttpClient();
             final Gson gson = new Gson();


           Request request = new Request.Builder()
                    .url("http://www.apirest.poligon.webimpuls.pl/v1/restapi/aktualnosci?offset=0?limit=50")
                   // .post(parametry)
                   .build();



            Response response = klient.newCall(request).execute();
            return response.body().string();



        }catch (Exception e){



            return null;
        }



    }


    @Override
    protected  void onPostExecute(String s){
        super.onPostExecute(s);

        TextView textView = (TextView) findViewById(R.id.ciastko);
        textView.setText(s);
    }


}

}

我对 android 有点陌生，使用的是 Android Studio。

任何人都可以用正常的方式向我解释或显示代码片段吗？

Answer 1

您需要制作自己的适配器。我更喜欢从 BaseAdapter 扩展并创建自己的列表项 class:

class ListItem {
    private long mId;
    private String mContent;

    public ListItem(final long mId, final String mContent) {
        this.mId = mId;
        this.mContent = mContent;
    }

    public long getId() {
        return mId;
    }

    public String getContent() {
        return mContent;
    }

}

public class adapter_akt extends BaseAdapter {
    private List<ListItem> mData = new ArrayList<>();

    public void setData(List<ListItem> data){
        mData = data;
        notifyDataSetChanged();
    }

    public  ListItem getItem(int position){
        return mData.get(position);
    }

    @Override
    public long getItemId(final int position) {
        return getItem(position).getId();
    }

    @Override
    public View getView(final int position, View convertView, final ViewGroup parent) {
        if (convertView == null){
            convertView = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent);
            ViewHolder h = new ViewHolder();
            h.textView1 = (TextView) convertView.findViewById(android.R.id.text1);
            convertView.setTag(h);
        }

        ViewHolder holder = (ViewHolder)convertView.getTag();
        ListItem item = getItem(position);
        holder.textView1.setText(item.getContent());

        return convertView;
    }

    public int getCount(){
        return mData.size();
    }

    private class ViewHolder{
        TextView textView1;
    }
}

那么您只需要将适配器设置为您的 ListView。

您的 AsyncTask 看起来像：

public class Test1 extends AsyncTask<String, Void, String> {

protected String doInBackground(String... params) {
    try {
        //*OKHTTP ponoć parametry dodaje do buildera*
   //     RequestBody parametry = new FormBody.Builder()
    //            .add("offset", "0")
     //           .add("limit", "50")
      //          .build();

        OkHttpClient klient = new OkHttpClient();
         final Gson gson = new Gson();


       Request request = new Request.Builder()
                .url("http://www.apirest.poligon.webimpuls.pl/v1/restapi/aktualnosci?offset=0?limit=50")
               // .post(parametry)
               .build();



        Response response = klient.newCall(request).execute();
        return response.body().string();



    }catch (Exception e){



        return null;
    }



}


@Override
protected  void onPostExecute(String s){
    super.onPostExecute(s);

    List<ListItem> contentList = new ArrayList<>();
    /*
     her u need to read data from s to the list; 
     */

    MyListAdapter adapter = find();//here u need to get your Adapter, maybe its member of your fragment class
    adapter.setData(contentList);
}


}

OkHTTP AndroidBaseAdapter 从数据到 ListView

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android-adapter

okhttp3