CODEWITHSUNDEEP
androidjson
Sherlock
Sherlock

Reputation: 19

return string from null on android

I have a problem : I use a web service to return some values , but some times some problems face the web services , and when I want to display them my app crashes , so I want to make sure that if there is nothing to show then return just empty space , and I use it on JSON , there is a part of my code if someone can help me , 

public static Article parseArticle(JSONObject jsonArticle) {

        Article article = new Article();

        try {
            article.setTitle(ArabicUtilities.reshape(Html.fromHtml(jsonArticle.getString("title")).toString()));
            article.setExcerpt(ArabicUtilities.reshape(Html.fromHtml(jsonArticle.getString("excerpt")).toString()));
            article.setContent(ArabicUtilities.reshape(Html.fromHtml(jsonArticle.getString("content")).toString()));
            article.setDate(jsonArticle.getString("date"));


            return article;
        } catch (JSONException e) {
            e.printStackTrace();
            return null;
        }
    }

private void loadinfo() {

         {
            programs = JSONParser.parseProgram(savedData);
            txt1.setText(article.get(1).getTitle());
            txt2.setText(article.get(0).getTitle());
            txt3.setText(article.get(1).excerpt());
            txt4.setText(article.get(0).excerpt());
            txt5.setText(article.get(1).content());
            txt6.setText(article.get(0).content());
            txt7.setText(article.get(1).date());
            txt8.setText(article.get(0).date());
        }

this is what happened when i try to have information it give error on 

        txt1.setText(article.get(1).getTitle());

that there is no values

Upvotes: 0

Views: 199

Answers (2)

Blackbelt
Blackbelt

Reputation: 157437

If I have not misunderstood you instead of jsonArticle.getString you can use jsonArticle.optString. It will return an empty String if the json does not contain that key.

String mString = jsonArticle.optString("title");
article.setTitle(ArabicUtilities.reshape(Html.fromHtml(mString).toString()));
mString = jsonArticle.optString("excerpt");                 
article.setExcerpt(ArabicUtilities.reshape(Html.fromHtml(mString).toString()));
mString = jsonArticle.optString("content");                     
article.setContent(ArabicUtilities.reshape(Html.fromHtml(mString).toString()));
mString = jsonArticle.optString("date");             
article.setDate(mString);

here the doc for optString()

EDIT

public static Article parseArticle(JSONObject jsonArticle) {

    Article article = new Article();

    try {
            String mString = jsonArticle.optString("title");
            article.setTitle(ArabicUtilities.reshape(Html.fromHtml(mString).toString()));
            mString = jsonArticle.optString("excerpt");                 
            article.setExcerpt(ArabicUtilities.reshape(Html.fromHtml(mString).toString()));
            mString = jsonArticle.optString("content");                     
            article.setContent(ArabicUtilities.reshape(Html.fromHtml(mString).toString()));
            mString = jsonArticle.optString("date");             
            article.setDate(mString);
    } catch (JSONException e) {
        e.printStackTrace();  
    }

       return article;
}

Upvotes: 1

vasanth
vasanth

Reputation: 715

public static Article parseArticle(JSONObject jsonArticle) {
     Article article = new Article();
    if(null!=jsonArticle){
        try {
            /*your code */
    }else{
        article.setTitle(ArabicUtilities.reshape("");
        article.setExcerpt(ArabicUtilities.reshape("");
        article.setContent(ArabicUtilities.reshape("");
        article.setDate("");
        return article;
        }
    }

Upvotes: 0

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