有這樣的情況下,我需要境界刪除所有對象,只留下最後10爲什麼我在嘗試刪除Realm中的對象時遇到ArrayIndexOutOfBoundsException?
有我的方法
private void invalidate() {
final int AVAILABLE_SIZE = 10;
final RealmResults<CardMainActivity> listToInvalidate = realmDB.where(CardMainActivity.class).findAll();
final int sizeOfList = listToInvalidate.size();
if (sizeOfList > AVAILABLE_SIZE) {
realmDB.executeTransaction(new Realm.Transaction() {
@Override
public void execute(Realm realm) {
for (int i = 0; i < sizeOfList - AVAILABLE_SIZE; i++) {
listToInvalidate.deleteFromRealm(i);
}
}
});
}
}
並沒有錯誤,我得到
FATAL EXCEPTION: main
Process: com.fittingroom.newtimezone, PID: 2438
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.fittingroom.newtimezone/com.fittingroom.newtimezone.view. activityMainNew.ActivityMainnew}: java.lang.ArrayIndexOutOfBoundsException: rowIndex > available rows: 12 > 12
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3253)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3349)
at android.app.ActivityThread.access$1100(ActivityThread.java:221)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.ArrayIndexOutOfBoundsException: rowIndex > available rows: 12 > 12
at io.realm.internal.TableView.nativeRemoveRow(Native Method)
at io.realm.internal.TableView.remove(TableView.java:410)
at io.realm.RealmResults.deleteFromRealm(RealmResults.java:295)
at com.fittingroom.newtimezone.tools.realmdb.RealmDB$1.execute(RealmDB.java:49)
at io.realm.Realm.executeTransaction(Realm.java:1304)
at com.fittingroom.newtimezone.tools.realmdb.RealmDB.invalidate(RealmDB.java:43)
at com.fittingroom.newtimezone.tools.realmdb.RealmDB.<init>(RealmDB.java:23)
at com.fittingroom.newtimezone.tools.realmdb.RealmDB.getInstance(RealmDB.java:28)
at com.fittingroom.newtimezone.view.activityMainNew.ControllerActivityMainnew.isDBContainsData(ControllerActivityMainnew.java:55)
但如果我嘗試以這種方式刪除我的對象
private void invalidate() {
final int AVAILABLE_SIZE = 10;
final RealmResults<CardMainActivity> listToInvalidate = realmDB.where(CardMainActivity.class).findAll();
final int sizeOfList = listToInvalidate.size();
if (sizeOfList > AVAILABLE_SIZE) {
realmDB.executeTransaction(new Realm.Transaction() {
@Override
public void execute(Realm realm) {
for (int i = 0; i < sizeOfList - AVAILABLE_SIZE; i++) {
CardMainActivity card = listToInvalidate.get(i);
card.deleteFromRealm();
}
}
});
}
}
所有作品不錯。但我需要使用第一種方法listToInvalidate.deleteFromRealm(i);
,所以
我做錯了什麼?
你使用的是什麼版本? – EpicPandaForce
@EpicPandaForce領域2.3.1 –