[英]Get number of post in list array from another class. But It doesn't work?
我嘗試從類中的數組列表中獲取帖子數到主要活動中。 但這是錯誤的。 這是我的代碼。
public static int countNotify;
public static List<Notification> bindNotifyData(JsonElement list)
{
List<Notification> results= new ArrayList<>();
JsonObject dataJsonObj = list.getAsJsonObject();
// get data api from Json array "updates"
JsonArray notifyJsonArray = dataJsonObj.get("updates").getAsJsonArray();
ArrayList<Notification> notifyList = new ArrayList<>();
countNotify=notifyJsonArray.size();
if(notifyJsonArray != null && notifyJsonArray.size() > 0) {
for(int i = 0; i < notifyJsonArray.size(); i++) {
JsonObject notifyJson = (JsonObject) notifyJsonArray.get(i);
Notification notification = new Notification();
notification.setContent(notifyJson.get("content").getAsString());
// Convert timestamp to Datetime
String timestamp= notifyJson.get("time").getAsString();
notification.setTime(ConvertTimestamp(timestamp));
results.add(notification);
// count numbers of the post in the list json array.
}
}
return results;
}
在 MainActivity.class 中
final int count=BindFetchDataHelper.countNotify;
但是count的值總是0
嘗試創建您的類的實例
BindFetchDataHelper bindFetchDataHelper = new BindFetchDataHelper()
然后調用 final int count=bindFetchDataHelper.countNotify;
我有同樣的問題,它現在應該可以工作了。
編輯
像這樣嘗試:
public class BindFetchDataHelper {
private static int sTest;
static {
public static int countNotify=0;
}
public static int getcountNotify() {
return countNotify;
}
public static void setcountNotify(int setcountNotify) {
this.countNotify = countNotify;
}
//your others functions
}
現在訪問變量或設置它:
BindFetchDataHelper bindFetchDataHelper = new BindFetchDataHelper ()
bindFetchDataHelper.setcountNotify(YOURVALUE); //set
int whatyourwant = bindFetchDataHelper.getcountNotify(); //get
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