如何从一个活动发送和接收json对象到另一个活动？

Question

我面临着从活动到另一个活动发送和接收google对象的问题。

 List<Integer> selectedScamMediumIds = scamMediumHorizontalAdapter.getSelectedScamMediumIds();
 JsonObject scamData = new JsonObject();
 JsonArray scamMediumJsonArray = new JsonArray();

 for (Integer scamMediumId:selectedScamMediumIds) {
     JsonPrimitive jsonPrimitive = new JsonPrimitive(scamMediumId);
     scamMediumJsonArray.add(jsonPrimitive);
 }
 scamData.add("scam_medium_id",scamMediumJsonArray);
 scamData.addProperty("scam_category_id", scamCategoryId);
 scamData.addProperty("scam_sub_category_id", scamSubCategoryId + "");
 scamData.addProperty("scammer_phone", phoneNumber.getText().toString());
 scamData.addProperty("scammer_location", scammerLocation.getText().toString());
 scamData.addProperty("lat", lattitude);
 scamData.addProperty("lng", longitude);

 Intent intent = new Intent(ScamLookUpActivity.this, ScamSearchActivity.class);
 intent.putExtra("scamDatas", scamData.toString());
 intent.putExtra("scamSubCategoryText", subCategoryTitle);
 startActivity(intent);

我试过以上方法，我不知道它是否正确。请帮助我如何发送和接收json对象从一个活动到另一个活动。

Answer 1

你这样做是正确的。要在另一个活动中获得它，您可以按照

if (getIntent().getExtras() != null) {
                String scamDatas = getIntent().getStringExtra("scamDatas");
                String scamSubCategoryText  = getIntent().getStringExtra("scamSubCategoryText");
                try {
                  JsonParser parser = new JsonParser(); 
                  JsonObject scamDataJsonObject = parser.parse(scamDatas).getAsJsonObject(); 
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

Answer 2

试一试

1.通过意图发送字符串

intent.put("scamData", scamData.getAsString(); //or scamData.toString();

2.在其他活动中从意图接收字符串

String scamDataStr = getIntent().getStringExtra("scamData");

3.使用JsonParser解析json的

new JsonParser().parse(scamDataStr);

Answer 3

您可以简单地将整个JSONObject作为字符串。就像这样：

i.putString("scamData", jsonObj.toString);

然后在MovieProductActivity中你可以

JSONObject jsonObj = new JSONObject(getIntent().getStringExtra("scamData"));