PreferenceFragment compile but my program doesn't work . What is the matter ? Exception code is here

Question

03-04 11:09:41.524: E/AndroidRuntime(943): FATAL EXCEPTION: main
03-04 11:09:41.524: E/AndroidRuntime(943): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.otobusumnerede/com.otobusumnerede.AyarlarActivity}: java.lang.NullPointerException
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.os.Looper.loop(Looper.java:137)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.ActivityThread.main(ActivityThread.java:5041)
03-04 11:09:41.524: E/AndroidRuntime(943):  at java.lang.reflect.Method.invokeNative(Native Method)
03-04 11:09:41.524: E/AndroidRuntime(943):  at java.lang.reflect.Method.invoke(Method.java:511)
03-04 11:09:41.524: E/AndroidRuntime(943):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-04 11:09:41.524: E/AndroidRuntime(943):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-04 11:09:41.524: E/AndroidRuntime(943):  at dalvik.system.NativeStart.main(Native Method)
03-04 11:09:41.524: E/AndroidRuntime(943): Caused by: java.lang.NullPointerException
03-04 11:09:41.524: E/AndroidRuntime(943):  at com.otobusumnerede.AyarlarActivity.onCreate(AyarlarActivity.java:24)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.Activity.performCreate(Activity.java:5104)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
03-04 11:09:41.524: E/AndroidRuntime(943):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
03-04 11:09:41.524: E/AndroidRuntime(943):  ... 11 more
03-04 11:24:14.452: E/Trace(1311): error opening trace file: No such file or directory (2)
03-04 11:24:44.843: E/AndroidRuntime(1311): FATAL EXCEPTION: main
03-04 11:24:44.843: E/AndroidRuntime(1311): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.otobusumnerede/com.otobusumnerede.AyarlarActivity}: java.lang.NullPointerException
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.os.Looper.loop(Looper.java:137)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.ActivityThread.main(ActivityThread.java:5041)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at java.lang.reflect.Method.invokeNative(Native Method)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at java.lang.reflect.Method.invoke(Method.java:511)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at dalvik.system.NativeStart.main(Native Method)
03-04 11:24:44.843: E/AndroidRuntime(1311): Caused by: java.lang.NullPointerException
03-04 11:24:44.843: E/AndroidRuntime(1311):     at com.otobusumnerede.AyarlarActivity.onCreate(AyarlarActivity.java:25)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.Activity.performCreate(Activity.java:5104)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
03-04 11:24:44.843: E/AndroidRuntime(1311):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
03-04 11:24:44.843: E/AndroidRuntime(1311):     ... 11 more

There is a `NullPointerException` @ line 25 `AyarlarActivity.java`. Fix it — Raghunandan, Mar 04 '14 at 12:02
public boolean onOptionsItemSelected(MenuItem item) this 25.line — DlkZnng, Mar 04 '14 at 14:29
@Override public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); ActionBar actionBar = getActionBar(); actionBar.setDisplayHomeAsUpEnabled(true);} it may. — DlkZnng, Mar 04 '14 at 14:34

score 0 · Answer 1 · answered Mar 04 '14 at 13:14

0

If you can copy text from your activity and paste it, or atleast paste line no.25 of your code, its easier to help you.

Going by as it is so early in your activity, check onCreate() first

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.yourlayoutxml);
imageView = (ImageView) findViewById(R.id.yourimageviewid); //just an example

make sure to call setContentView() before any findViewById
check if you have declared, initialized your variables properly
if so, look for a value that could be null

answered Mar 04 '14 at 13:14

Pararth

8,114
4
34
51

Yes, It fixed user2450263 – DlkZnng Mar 16 '14 at 01:39
1

http://meta.stackexchange.com/questions/23138/how-to-accept-the-answer-on-stack-overflow – Pararth Mar 16 '14 at 05:14

PreferenceFragment compile but my program doesn't work . What is the matter ? Exception code is here

1 Answers1