Null pointer exception on scren rotate android

Question

enter code hereI have the android:configChanges="orientation" in manifest but for some reason after rotating the view its going to next activity and NullPointerException

12-03 17:28:42.673: ERROR/AndroidRuntime(10537): FATAL EXCEPTION: main
        java.lang.RuntimeException: Unable to start activity ComponentInfo{com.is.mbank/com.is.mbank.ui.mobileBanking.TransactionConfirmation}: java.lang.NullPointerException
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3740)
        at android.app.ActivityThread.access$700(ActivityThread.java:141)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:5103)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:525)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
        at dalvik.system.NativeStart.main(Native Method)
        Caused by: java.lang.NullPointerException
        at com.is.mbank.ui.mobileBanking.TransactionConfirmation.onCreate(TransactionConfirmation.java:45)
        at android.app.Activity.performCreate(Activity.java:5133)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
        ... 12 more

HERE is the code for TransactionConfirmation

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.transaction_confirmation);

        paymentUtil = new PaymentUtil(this);

        textViewFrom = (TextView) findViewById(R.id.from);
        textViewTo = (TextView) findViewById(R.id.to);
        textViewAmount = (TextView) findViewById(R.id.amount);
        textViewCurrency = (TextView) findViewById(R.id.currency);

        from = paymentUtil.paymentData.get(Constants.ACCOUNT_NUMBER_FROM).toString();

its generatign a null pointer exception on the last row

check this http://stackoverflow.com/questions/456211/activity-restart-on-rotation-android?rq=1 — kalyan pvs, Dec 03 '13 at 13:26
its an activity not an application , cant change it extend Application. — user2877963, Dec 03 '13 at 13:31
TransactionConfirmation.java:45 what is line number 45 in TransactionConfirmation.java class — InnocentKiller, Dec 03 '13 at 13:32
@user2877963 when orientation changes activity is destroyed and recreated. Looks like line 4 `TransactionConfirmation.java` is null. http://developer.android.com/guide/topics/resources/runtime-changes.html — Raghunandan, Dec 03 '13 at 13:32
this could happen if you have another layout file for the new orientation, where views are missing or not all id's are specified — grexter89, Dec 03 '13 at 13:36

score 2 · Answer 1 · answered Dec 03 '13 at 13:43

2

change according below in your manifest file

android:configChanges="keyboardHidden|orientation|screenSize|screenLayout"

Hope this can be useful.

answered Dec 03 '13 at 13:43

Karan Maru

991
6
17

score 1 · Answer 2 · answered Dec 03 '13 at 13:32

1

When you rotate the screen the activity is destroyed and regenereated, so you should check if the activity looks for some parameters (maybe passed using intents and so on) and when it is generated again they aren't present.

answered Dec 03 '13 at 13:32

FrancescoAzzola

2,666
2
15
22

Im setting the intent.class to TransactionConfirmation but why is it starting by its own on rotate action? – user2877963 Dec 03 '13 at 13:34

score 0 · Answer 3 · answered Dec 03 '13 at 13:51

0

issue solved, the problem was I was setting the class for my intent in onCreate() its working fine now after i removed it from there.

thanks for your attention.

regards,

answered Dec 03 '13 at 13:51

user2877963

57
7

Null pointer exception on scren rotate android

3 Answers3