Question

我想通过应用条件来更改文本的颜色。我从杰森那里得到了文字。代码正常运行，没有，该代码末尾没有“检查颜色变化”部分。否则，它什么也不会返回。应用程序崩溃。有什么问题？？

这是代码：

ArrayList<HashMap<String, String>> list = new ArrayList<>();

        try {
            JSONObject jobj = new JSONObject(jsonResposnce);
            JSONArray jarray = jobj.getJSONArray("items");


            for (int i = 0; i < jarray.length(); i++) {

                JSONObject jo = jarray.getJSONObject(i);

                String itemName = jo.getString("itemName");
                String Power = jo.getString("Power");
                String RH = jo.getString("RH");
                String DAILYDATE = jo.getString("DAILYDATE");
                String TPH = jo.getString("TPH");
                String Production = jo.getString("Production");



                HashMap<String, String> item = new HashMap<>();
                item.put("itemName", itemName);
                item.put("Power", Power);
                item.put("RH", RH);
                item.put("TPH", TPH);
                item.put("DAILYDATE", DAILYDATE);
                item.put("Production", Production);

                list.add(item);

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

        listView.setAdapter(new ArrayAdapter<HashMap<String, String>>(this, R.layout.listdaily_row,
                R.id.yx_item_name, list) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View rowView = super.getView(position, convertView, parent);
                final HashMap<String, String> item = getItem(position);

                TextView itemName = rowView.findViewById(R.id.yx_item_name);
                itemName.setText(item.get("itemName"));
                TextView Power = rowView.findViewById(R.id.yx_power);
                Power.setText(item.get("Power"));
                TextView RH = rowView.findViewById(R.id.yx_rh);
                TextView TPH = rowView.findViewById(R.id.yx_tph);
                TPH.setText(item.get("TPH"));
                TextView DAILYDATE = rowView.findViewById(R.id.yx_date);
                DAILYDATE.setText(item.get("DAILYDATE"));
                TextView Production = rowView.findViewById(R.id.yx_prod);
                Production.setText(item.get("Production"));


                // check for the color change

                String check = item.get("RH");
                if (check != null && Integer.parseInt(check) >= 10) {
                    RH.setTextColor(Color.GREEN);
                } else {
                    RH.setTextColor(Color.RED);
                }
                RH.setText(item.get("RH"));


                return rowView;
            }
        });

Answer 1

问题是空字符串。因此，我修改了检查部分以处理空值问题，如下所示，现在它可以正常工作了。

//查看价格

-legacy_icecast 1

将字符串转换为整数

1 个答案: