Question

我试图将2个String []从doinbackground传递到片段，其中我有RecyclerView。我也尝试过setter getter方法，但仍然没有运气

这是我的片段

 @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view=inflater.inflate(R.layout.activity_friend_list,container,false);
        recyclerView= (RecyclerView) view.findViewById(R.id.RecyclerViewForFriendList);

            //WANTS TO REPLACE THESE TWO ARRAY WITH WHICH I AM GETTING IN DOINBACKGROUND
            Name=getResources().getStringArray(R.array.left_Drawer_Menu);
            Image=getResources().obtainTypedArray(R.array.user_image);

        recyclerView.setHasFixedSize(true);

        adapter=new RecyclerFriendListAdapter(getActivity(),Distance,Image,LastSeen,Name);
        recyclerView.setAdapter(adapter);

        layoutManager=new LinearLayoutManager(getActivity());
        recyclerView.setLayoutManager(layoutManager);



        return view;
    }

这是我的AsyncTask类

 protected String[] doInBackground(String... params) {
        try {
            URL url=new URL(URL_Path);
            connection= (HttpURLConnection) url.openConnection();
            connection.connect();


            InputStream inputStream=connection.getInputStream();
            reader=new BufferedReader(new InputStreamReader(inputStream));
            String line;
            StringBuffer stringBuffer=new StringBuffer();
            while ((line=reader.readLine())!=null){
                stringBuffer.append(line);

            }
            String completeJSON=stringBuffer.toString();

            JSONArray parentArray=new JSONArray(completeJSON);

            String[] Name=new String[parentArray.length()];
            String[] ImagePath=new String[parentArray.length()];
            for (int i = 0; i <parentArray.length() ; i++) {
                JSONObject childObject=parentArray.getJSONObject(i);

                String Fname=childObject.getString("First_Name") ;
                String Lname=childObject.getString("Last_Name") ;

                Name[i]=Fname+" "+Lname;
                ImagePath[i]=childObject.getString("Image");
                Log.d(TAG,"String Arrays "+Name[i]+" "+ ImagePath[i]);

                     //GETTING ALL VALUES IN LOG SUCCESSFULLY 



            }
            return Name;

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        } finally {

            try {
                connection.disconnect();
                if (reader!=null) {
                    reader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }

@Override
    protected void onPostExecute(String[] strings) {
        super.onPostExecute(strings);
    }

我在片段父活动的工具栏中调用AsyncTask执行方法

更新：

1）作为@BryanDunlap被要求 onPostExecute （它刚刚实现，其中没有代码）以及如何返回两个数组以获取片段

2）@IrisLouis建议实现界面，这是我如何处理setter和getter但我没有工作

ublic class WrapperClass {

    private String[] Name;
    private String[] ImagePath;

    public String[] getImagePath() {
        return ImagePath;
    }

    public void setImagePath(String[] imagePath) {
        ImagePath = imagePath;
    }

    public String[] getName() {

        return Name;
    }

    public void setName(String[] name) {
        Name = name;
    }

我如何在AsyncTask中设置它

                Name[i]=Fname+" "+Lname;
                ImagePath[i]=childObject.getString("Image");
                Log.d(TAG,"String Arrays "+Name[i]+" "+ ImagePath[i]);
                //LOG RETURNS VALUE OF BOTH ARRAYS

                WrapperClass w=new WrapperClass();
                w.setImagePath(ImagePath);
                w.setImagePath(Name);

在onCreateView中获取片段

  @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) { 
                              ....
                              ....
                              ....
    WrapperClass wrapperClass=new WrapperClass();
            String[] Name=wrapperClass.getName();
            String[] ImagePath=wrapperClass.getImagePath();
            Log.d(TAG,Name.toString()+" "+ ImagePath.toString())


             //IT RETURNS NULLS

Answer 1

为您解决方案，可以对其进行测试。

在Asynctask类中创建一个接口回调结果：

public class PageLoader extends AsyncTask<String, Void, String[] results> {

    private Context context;
    private LoaderListener mLoaderListener;

    public PageLoader(Context context, LoaderListener mLoaderListener) {
        this.context = context;
        this.mLoaderListener = mLoaderListener;
    }

    public interface LoaderListener {
        void onLoadCompleted(String[] results);

        void onLoadFailed();

        void onPreparing();
    }

    @Override
    protected void onPreExecute() {
        mLoaderListener.onPreparing();
    }

    @Override
    protected String[] doInBackground(String... params) {
         try {
            URL url=new URL(URL_Path);
            connection= (HttpURLConnection) url.openConnection();
            connection.connect();


            InputStream inputStream=connection.getInputStream();
            reader=new BufferedReader(new InputStreamReader(inputStream));
            String line;
            StringBuffer stringBuffer=new StringBuffer();
            while ((line=reader.readLine())!=null){
                stringBuffer.append(line);

            }
            String completeJSON=stringBuffer.toString();

            JSONArray parentArray=new JSONArray(completeJSON);

            String[] Name=new String[parentArray.length()];
            String[] ImagePath=new String[parentArray.length()];
            for (int i = 0; i <parentArray.length() ; i++) {
                JSONObject childObject=parentArray.getJSONObject(i);

                String Fname=childObject.getString("First_Name") ;
                String Lname=childObject.getString("Last_Name") ;

                Name[i]=Fname+" "+Lname;
                ImagePath[i]=childObject.getString("Image");
                Log.d(TAG,"String Arrays "+Name[i]+" "+ ImagePath[i]);

                     //GETTING ALL VALUES IN LOG SUCCESSFULLY 



            }
            return Name;

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        } finally {

            try {
                connection.disconnect();
                if (reader!=null) {
                    reader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }

    @Override
    protected void onPostExecute(String[] results) {
        if (results!= null) {
            mLoaderListener.onLoadCompleted(results);
        } else {
            mLoaderListener.onLoadFailed();
        }
    }


}

在Activity中执行Asynctask。

在Fragment中，你必须实现LoaderListener和Override三个函数。

例如：YourFragment extends Fragment implements LoaderListener

您可以在onLoadCompleted

中处理结果回调

前：

@Override
public void onLoadCompleted(String[] results){
  //Do something with results
}

将两个String数组从doinbackground传递到片段

1 个答案: