Android 将 json 解析为可扩展 View

Question

我想实现这样的东西:

这是父 View 。当我点击它时，我必须显示它的 ExpandableListView:

public class MainActivity extends AppCompatActivity {
    ProgressDialog PD;

    private ExpandListAdapter ExpAdapter;
    private ExpandableListView ExpandList;
    ArrayList<Group> list = new ArrayList<Group>();
    ArrayList<Child> ch_list= new ArrayList<Child>();``
    String url=ApplicationConstant.THIRD_WEB_CALL_HISTORY;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_history);
        ExpandList = (ExpandableListView) findViewById(R.id.exp_list);

        PD = new ProgressDialog(this);
        PD.setMessage("Loading.....");
        PD.setCancelable(false);
        new HistoryAsynktask().execute(url);

    }
    class  HistoryAsynktask extends AsyncTask<String ,String ,String> {

        @Override
        protected String doInBackground(String... uri) {
            HttpClient httpClient= new DefaultHttpClient();
            HttpResponse httpResponse;
            String histry_result = null;

            try {
                httpResponse=httpClient.execute(new com.loopj.android.http.HttpGet(uri[0]));
                StatusLine statusLine=httpResponse.getStatusLine();
                if (statusLine.getStatusCode()== HttpStatus.SC_OK){
                    ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
                    httpResponse.getEntity().writeTo(byteArrayOutputStream);
                    histry_result=byteArrayOutputStream.toString();
                    JSONObject jsonObject= new JSONObject(histry_result);
                    JSONObject jsonObject1= jsonObject.getJSONObject("GetLastTxnsCustResult");
                    String status= jsonObject1.getString("status");
                    JSONArray jsonArray = jsonObject1.getJSONArray("txns");

                    for (int i =0 ;i< jsonArray.length();i++)
                    {
                        Child child = new Child();
                        Group group= new Group();
                        JSONObject jsonObject2= jsonArray.getJSONObject(i);
                        String address=jsonObject2.getString("address");
                        String city =jsonObject2.getString("city");
                        String last_4 = jsonObject2.getString("last_4");
                        String merch_name =jsonObject2.getString("merch_name");
                        String  phone = jsonObject2.getString("phone");
                        String state = jsonObject2.getString("state");
                        String tran_id =jsonObject2.getString("tran_id");
                        String txn_amt = jsonObject2.getString("txn_amt");
                        String txn_date = jsonObject2.getString("txn_date");
                        String zip= jsonObject2.getString("zip");
                        group.setMerch_name(merch_name);
                        group.setTxn_amt(txn_amt);
                        group.setTxn_date(txn_date);
                        child.setName(address);
                        ch_list.add(child);
                        list.add(group);

                    }


                }


            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return histry_result;
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();



        }

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


            ExpAdapter = new ExpandListAdapter(
                    History.this, list);
            ExpandList.setAdapter(ExpAdapter);

        }
    }
}

我的适配器类是:

public class ExpandListAdapter extends BaseExpandableListAdapter {

    private Context context;
    private ArrayList<Group> groups;


    public ExpandListAdapter(Context context, ArrayList<Group> groups) {
        this.context = context;
        this.groups = groups;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        ArrayList<Child> chList = groups.get(groupPosition).getItems();
        return chList.get(childPosition);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
                             boolean isLastChild, View convertView, ViewGroup parent) {

        Child child = (Child) getChild(groupPosition, childPosition);
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) context
                    .getSystemService(context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.child_item, null);
        }

        TextView tv = (TextView) convertView.findViewById(R.id.country_name);

        tv.setText(child.getName().toString());
        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        ArrayList<Child> chList = groups.get(groupPosition).getItems();
        return chList.size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return groups.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return groups.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        Group group = (Group) getGroup(groupPosition);
        if (convertView == null) {
            LayoutInflater inf = (LayoutInflater) context
                    .getSystemService(context.LAYOUT_INFLATER_SERVICE);
            convertView = inf.inflate(R.layout.group_item, null);
        }
        TextView tv = (TextView) convertView.findViewById(R.id.trns);
        TextView date=(TextView) convertView.findViewById(R.id.dateTime);
        TextView trn_amt=(TextView) convertView.findViewById(R.id.txnmnt);
        tv.setText(group.getMerch_name());
        date.setText(group.getTxn_date());
        trn_amt.setText(group.getTxn_amt());
        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return true;
    }

    }

Answer 1

在下面的链接中，您可以在 listDataHeader 中添加标题数据，在 listDataChild 中添加子数据，并进行以下一些更改。

HashMap< String, List< Modelclass>> parent;
List<  Modelclass > comingSoon1;
for (int i =0 ;i< jsonArray.length();i++)
{             
     parent = new HashMap<String, List<Modelclass>>();
     comingSoon1 = new ArrayList<Modelclass>();
     Group  group=new Group();
     JSONObject jsonObject2= jsonArray.getJSONObject(i);
     String address=jsonObject2.getString("address");
     String city =jsonObject2.getString("city");
     String last_4 = jsonObject2.getString("last_4");
     String merch_name =jsonObject2.getString("merch_name");
     String  phone = jsonObject2.getString("phone");
     String state = jsonObject2.getString("state");
     String tran_id =jsonObject2.getString("tran_id");
     String txn_amt = jsonObject2.getString("txn_amt");
     String txn_date = jsonObject2.getString("txn_date");
     String zip= jsonObject2.getString("zip");
     group.setMerch_name(merch_name);
     group.setTxn_amt(txn_amt);
     group.setTxn_date(txn_date);
     comingSoon1.add(group);
     parent.put("Your Heading", comingSoon1);        
}

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