我做了findInBackground
查询以获取对象列表。之后,我从我得到的结果中创建自己的对象:
query.findInBackground(new FindCallback<ParseObject>() {
public void done(final List<ParseObject> hangOutList, ParseException e) {
if (e == null) {
for (int i = 0; i < hangOutList.size(); i++) {
String objectID= hangOutList.get(i).getObjectId();
String city = hangOutList.get(i).getString("City");
String name = hangOutList.get(i).getString("Name");
String createdBy =
hangOutList.get(i).getString("CreatedBy");
HangOut ho=new HangOut(objectID, name, city, createdBy);
hangOuts.add(ho);
}
现在,当我点击其中一个时,我希望能够将其删除。在文档中,他们说要执行此操作:myObject.deleteInBackground();
但是,我没有ParseObject
所以我不能这样做。现在我正试图做这样的事情:
private void deleteHangout() {
ParseObject po=new ParseObject("HangOut");
po.setObjectId(hangOut.getObjectID());
po.deleteInBackground();
}
它不起作用。有没有办法如何通过ID创建Parse对象。还是其他任何想法?
执行deleteHangout
后我得到的错误:
01-18 13:41:07.659 1716-1716/com.parse.starter E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Attempted to change an objectId to one that's
already known to the Offline Store.
at com.parse.OfflineStore.updateObjectId(OfflineStore.java:598)
at com.parse.ParseObject.setObjectIdInternal(ParseObject.java:1106)
at com.parse.ParseObject.setObjectId(ParseObject.java:1094)
at com.parse.starter.HangOuts.
HangOutDetail.deleteHangout(HangOutDetail.java:61)
at com.parse.starter.HangOuts.
HangOutDetail.access$000(HangOutDetail.java:16)
at com.parse.starter.HangOuts.
HangOutDetail$1.onClick(HangOutDetail.java:54)
at android.view.View.performClick(View.java:4204)
at android.view.View$PerformClick.run(View.java:17355)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.
ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
注意:我想避免对服务器进行不必要的调用。
答案 0 :(得分:5)
你在做什么是你正在创建一个对象,然后在你刚刚创建的另一个对象上调用该方法,做你想要的创建一个没有data的Parse对象所需的东西,然后尝试使用deleteEventually方法,因此它首先在本地删除对象,即使脱机,一旦连接,它将从服务器中删除它。
ParseObject po= ParseObject.createWithoutData("HangOut", hangOut.getObjectID());
po.deleteEventually();