我有以下的JSON:解析JSON陣列與不同的對象他們班
[
{
"type": 1,
"Steps": {
"steps": steps
}
},
{
"type": 2,
"HeartRate": {
"heartrates": heartRates
}
}
]
場的步驟只是一個int的heartRates爲int的數組。我想 使用gson解析這兩個類。 我在stackoverflow上發現了一個類似的問題:How parse json array with multiple objects by gson?並嘗試過,但沒有奏效。這是我的代碼:
public class DataModels extends ArrayList<DataModels.Container> {
public class Container {
public int type;
public Object object;
}
public class Steps {
double steps;
public Steps(double steps) {
this.steps = steps;
}
public double getSteps() {
return steps;
}
@Override
public String toString() {
return "Steps: " + steps;
}
}
public class HeartRate {
int heartRate;
public HeartRate(int hr) {
heartRate = hr;
}
public double getHeartRate() {
return heartRate;
}
@Override
public String toString() {
return "Heart rate: " + heartRate;
}
}
}
然後解析的json:
public String getJSONMessage(String gearSData) {
System.out.println(gearSData);
Gson gson = new Gson();
DataModels model = gson.fromJson(gearSData, DataModels.class);
System.out.println(model);
for (DataModels.Container container: model) {
System.out.println(container.type);
System.out.println(container.object);
String innerJson = gson.toJson(container.object);
System.out.println("InnerJson: " + innerJson);
switch (container.type) {
case 1:
DataModels.Steps steps = gson.fromJson(innerJson, DataModels.Steps.class);
System.out.println(steps);
break;
case 2:
DataModels.HeartRate heartRate = gson.fromJson(innerJson, DataModels.HeartRate.class);
System.out.println(heartRate);
break;
}
}
}
類型被正確解析,但innerjson爲空,我不知道爲什麼。有人可以解釋這一點嗎?或者有人知道更好的方法來做到這一點?