Remove item in arrayList , java.lang.UnsupportedOperationException

Question

I want remove item in array list select location

My code is

    List<String> historylist = Arrays.asList(history);
    if (historylist.size()>=3){
        System.out.print("*************************************************");
        Log.i(MyContants.StoredHistory_TAG,"StoredHistory size========="+ String.valueOf(historylist.size()));
        String removePosition=historylist.get(2);
        historylist.remove(removePosition);
    }

but i got a Exception UnsupportedOperationException

error

    12-20 09:16:27.680: I/StoredHistory Class(5715): StoredHistory size=========3
    12-20 09:16:27.680: D/AndroidRuntime(5715): Shutting down VM
    12-20 09:16:27.684: W/dalvikvm(5715): threadid=1: thread exiting with uncaught exception (group=0x4001d7d0)
    12-20 09:16:27.688: E/AndroidRuntime(5715): FATAL EXCEPTION: main
    12-20 09:16:27.688: E/AndroidRuntime(5715): java.lang.RuntimeException: Unable to start activity ComponentInfo{****PACKAGE NAME*****}: java.lang.UnsupportedOperationException
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.os.Handler.dispatchMessage(Handler.java:99)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.os.Looper.loop(Looper.java:123)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.app.ActivityThread.main(ActivityThread.java:4627)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at java.lang.reflect.Method.invokeNative(Native Method)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at java.lang.reflect.Method.invoke(Method.java:521)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at dalvik.system.NativeStart.main(Native Method)
    12-20 09:16:27.688: E/AndroidRuntime(5715): Caused by: java.lang.UnsupportedOperationException
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at java.util.AbstractList.remove(AbstractList.java:645)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at java.util.AbstractList$SimpleListIterator.remove(AbstractList.java:77)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at java.util.AbstractCollection.remove(AbstractCollection.java:230)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at ******.utills.StoredHistory.storedHistorylist(StoredHistory.java:24)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at *******.ScanResult.onCreate(ScanResult.java:53)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
    12-20 09:16:27.688: E/AndroidRuntime(5715):     ... 11 more

How to cleat this issue .. Advance thanx dude

Community · Accepted Answer · 2017-05-23 12:29:46Z

6

Change

List<String> historylist = Arrays.asList(history);

to

 List<String> historylist = new LinkedList (Arrays.asList(history));

and see this post why this error occur in case of List :

Why do I get an UnsupportedOperationException when trying to remove an element from a List?

edited May 23, 2017 at 12:29

CommunityBot

11 silver badge

answered Dec 20, 2012 at 4:04

ρяσѕρєя K

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Ted Hopp · Accepted Answer · 2012-12-20 04:05:07Z

5

You cannot add or remove elements from the list returned by Arrays.asList because the list is backed by the original array. To create a list that you can modify, you can do this:

List<String> historylist = new ArrayList<String>(Arrays.asList(history));

answered Dec 20, 2012 at 4:05

Ted Hopp

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Aelexe · Accepted Answer · 2012-12-20 04:05:15Z

1

I believe Arrays.asList() creates is fixed-length, and so does not support removing.

Try using an implementation that supports removing like ArrayList instead.

answered Dec 20, 2012 at 4:05

Aelexe

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Kishan Vaghela · Accepted Answer · 2015-05-27 17:52:43Z

0

try this

 list.set(position,obj);

answered May 27, 2015 at 17:52

Kishan Vaghela

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