JSON數組解析多個數組

Question

我有要解析的JSON代碼片段：基本上，我想存儲“有效時間”和“目的”，您可以使用Java（Android Studio）在“結果” json數組中看到，但我是這是我第一次處理JSON，因此很努力。

 {
      "results": [
        {
          "effective_time": "20121114",
          "inactive_ingredient": [
            "Inactive ingredients *acetylated monoglycerides, *anhydrous lactose, *carnauba wax, colloidal silicon dioxide,*corn starch, *croscarmellose sodium, D&C Yellow #10 Aluminum Lake, FD&C Yellow #6 Aluminum Lake, hypromellose, *hypromellose phthalate, *iron oxide Yellow (iron oxide ochre), methacrylic acid copolymer, microcrystalline cellulose, *mineral oil, *polyethylene glycol (PEG)-400, *polysorbate 80, povidone, pregelatinized starch, *propylene glycol, *simethicone, silicon dioxide, sodium bicarbonate, sodium hydroxide, sodium lauryl sulfate, starch, stearic acid, talc, titanium dioxide, triacetin, and triethyl citrate. *May also contain."
          ],
          "purpose": [
            "Purpose Pain reliever"
          ],
          "keep_out_of_reach_of_children": [
            "Keep out of reach of children In case of overdose, get medical help or contact a Poison Control Center right away."
          ]
              ...
              ...
        }
       ]
 }

到目前為止，這是我的代碼

String drugDescription="no description";
try{
    JSONObject jsonQueryResult = new JSONObject(JSONFILE);
        JSONArray jsonResultArray = jsonQueryResult.getJSONArray("result");
        JSONObject jsonDrugDescription = jsonResultArray.getJSONObject(0);
        drugDescription = jsonDrugDescription.toString();
}
catch(JSONException e){
        e.printStackTrace();
}
searchResultTextView.setText(drugDescription);

drugDescription仍顯示“無描述”

感謝您的幫助！

Answer 1

如果您是新手，則應在此處閱讀有關Json解析的一些教程。

為了獲得effective_time和purpose您可以執行以下操作：

try {
        JSONObject jsonObject = new JSONObject(json);
        JSONArray firstResult = jsonObject.getJSONArray("results");
        if (firstResult != null && firstResult.length() > 0) {
            for (int i=0; i<firstResult.length(); i++) {
                JSONObject result = firstResult.getJSONObject(i);
                // This is your effective_time; 
                String effective_time = result.getString("effective_time"); 
                JSONArray purpose = result.getJSONArray("purpose");
                if (purpose != null && purpose.length() > 0) {
                    for (int j=0; j<purpose.length(); j++) {
                        // This is the purpose;
                        String purposeData = purpose.getString(j); 
                    }
                }
            }
        }
    } catch (JSONException e) {
        e.printStackTrace();
}