如何从 android 中的 json 对象中删除和解析空字符串并显示为列表

Question

我使用复选框来选择字段，如下图所示

我得到 json 对象作为，

"painWorse":"Sitting,Standing,,,,Lying Down"

我需要解析显示为

坐着
站立
躺着

目前我将文本设置为：

viewHolder.painWorse.setText(assessObject.get("painWorse").toString().replace("\"", ""));

我需要跳过空项目并仅解析和显示选中的 items.How 以实现此目的

适配器代码：

public class AssessmentAdapter extends RealmBasedRecyclerViewAdapter<Assessment, AssessmentAdapter.ViewHolder> {

    Context mContext;

    public AssessmentAdapter(
            Context context,
            RealmResults<Assessment> realmResults,
            boolean automaticUpdate,
            boolean animateIdType) {
        super(context, realmResults, automaticUpdate, animateIdType);
        mContext = context;
    }

    public class ViewHolder extends RealmViewHolder {

//

        @BindView(R.id.visitDate)
        TextView visitDate;
        @BindView(R.id.Name)
        TextView name;
        @BindView(R.id.txtAge)
        TextView age;
        @BindView(R.id.txtSex)
        TextView sex;
        @BindView(R.id.problemBegin)
        TextView problem;
        @BindView(R.id.problem)
        TextView problemBegin;
        @BindView(R.id.morningRate)
        TextView morningRate;
        @BindView(R.id.afternoonRate)
        TextView afternoonRate;
        @BindView(R.id.eveningRate)
        TextView eveningRate;
        @BindView(R.id.assessmentDetails)
        CardView assessmentDetails;
        @BindView(R.id.painWorse)
        TextView painWorse;
        @BindView(R.id.currentCondition)
        TextView currentCondition;
        @BindView(R.id.diagnosticStudied)
        TextView diagnosticStudied;
        @BindView(R.id.medications)
        TextView medications;
        @BindView(R.id.history)
        TextView history;
        @BindView(R.id.goals)
        TextView goals;


        public ViewHolder(View container) {
            super(container);
            ButterKnife.bind(this, container);
        }
    }

    @Override
    public ViewHolder onCreateRealmViewHolder(ViewGroup viewGroup, int viewType) {

        ViewHolder vh = null;
        try {
            View v = inflater.inflate(R.layout.assessment_card_view, viewGroup, false);
            vh = new ViewHolder(v);

        } catch (Exception e) {
            Log.v(Constants.TAG, "onCreateRealmViewHolder Exception: " + e.toString());
        }
        return vh;
    }

    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
    @Override
    public void onBindRealmViewHolder(ViewHolder viewHolder, int position) {

        final Assessment assessment = realmResults.get(position);

        try {


            JsonParser parser = new JsonParser();
            JsonArray assess = parser.parse(assessment.getAssesment().toString()).getAsJsonArray();
            Log.v(Constants.TAG, "assessing" + assess);
            JsonObject assessObject = assess.get(0).getAsJsonObject();
            Log.v(Constants.TAG, "assessObject" + assessObject);
            viewHolder.visitDate.setText(assessObject.get("Date").toString().replace("\"", ""));
            viewHolder.name.setText(assessObject.get("Name").toString().replace("\"", ""));
            viewHolder.age.setText(assessObject.get("Age").toString().replace("\"", ""));
            viewHolder.sex.setText(assessObject.get("Sex").toString().replace("\"", ""));
            viewHolder.problem.setText(assessObject.get("Problem").toString().replace("\"", ""));
            viewHolder.problemBegin.setText(assessObject.get("ProblemBegin").toString().replace("\"", ""));
            viewHolder.morningRate.setText(assessObject.get("morningRate").toString().replace("\"", ""));
            viewHolder.afternoonRate.setText(assessObject.get("afternoonRate").toString().replace("\"", ""));
            viewHolder.eveningRate.setText(assessObject.get("eveningRate").toString().replace("\"", ""));
            viewHolder.painWorse.setText(assessObject.get("painWorse").toString().replace("\"", ""));
            viewHolder.currentCondition.setText(assessObject.get("currentCondition").toString().replace("\"", ""));
            viewHolder.diagnosticStudied.setText(assessObject.get("Diagnostic").toString().replace("\"", ""));
            viewHolder.medications.setText(assessObject.get("Medications").toString().replace("\"", ""));
            viewHolder.history.setText(assessObject.get("History").toString().replace("\"", ""));
            viewHolder.goals.setText(assessObject.get("Goals").toString().replace("\"", ""));
            viewHolder.assessmentDetails.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                }
            });


        } catch (Exception e) {
            Log.v(Constants.TAG, "Exception: " + e.toString());
        }

    }


}

Answer 1

您可以使用 GSON/ Jackson 来解析您的 JSON 对象。您会在这些库中找到大量注释来排除 EMPTY、NULL 等。他们还提供了更容易阅读的代码

此处给出了使用 GSON 的示例

https://www.mkyong.com/java/how-do-convert-java-object-to-from-json-format-gson-api/

Answer 2

在对您的代码一无所知的情况下，我会说您需要使用正则表达式来删除那些多个逗号

String pain = "Sitting,Standing,,,,Lying Down";
pain = pain.replaceAll(",+",","); // Replace every ocurrence of one or more commas with just one comma
// pain = "Sitting,Standing,Lying Down";

一种更清晰、更简单的格式化此信息的方法是使用 LinearLayout 动态填充与项目一样多的 TextView。因此，一旦您可以执行以下操作：

将您的 painWorse 更改为垂直方向的 LinearLayout
将您的字符串分成几项String[] items = pain.split(",");

动态填充你的新LinearLayout

for (String item : items) {
    TextView tv = new TextView(context);
    tv.setText(item);
    // any other styling here...
}

如何从 android 中的 json 对象中删除和解析空字符串并显示为列表

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