My program continuous gives error. Can you help me? I have tried so hard but didn't improve the error

Question

03-11 15:03:32.743: E/AndroidRuntime(1556): FATAL EXCEPTION: main
03-11 15:03:32.743: E/AndroidRuntime(1556): Process: com.example.takipci, PID: 1556
03-11 15:03:32.743: E/AndroidRuntime(1556): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.takipci/com.example.takipci.AyarlarActivity}: java.lang.RuntimeException: Subclasses of PreferenceActivity must override isValidFragment(String) to verify that the Fragment class is valid! com.example.takipci.AyarlarActivity has not checked if fragment com.example.takipci.fragment.GizlilikPreferencesFragment is valid.
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.ActivityThread.access$800(ActivityThread.java:135)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.os.Handler.dispatchMessage(Handler.java:102)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.os.Looper.loop(Looper.java:136)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.ActivityThread.main(ActivityThread.java:5017)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at java.lang.reflect.Method.invokeNative(Native Method)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at java.lang.reflect.Method.invoke(Method.java:515)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at dalvik.system.NativeStart.main(Native Method)
03-11 15:03:32.743: E/AndroidRuntime(1556): Caused by: java.lang.RuntimeException: Subclasses of PreferenceActivity must override isValidFragment(String) to verify that the Fragment class is valid! com.example.takipci.AyarlarActivity has not checked if fragment com.example.takipci.fragment.GizlilikPreferencesFragment is valid.
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.preference.PreferenceActivity.isValidFragment(PreferenceActivity.java:898)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.preference.PreferenceActivity.switchToHeaderInner(PreferenceActivity.java:1179)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.preference.PreferenceActivity.switchToHeader(PreferenceActivity.java:1199)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.preference.PreferenceActivity.onCreate(PreferenceActivity.java:545)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at com.example.takipci.AyarlarActivity.onCreate(AyarlarActivity.java:20)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.Activity.performCreate(Activity.java:5231)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-11 15:03:32.743: E/AndroidRuntime(1556):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
03-11 15:03:32.743: E/AndroidRuntime(1556):     ... 11 more

Including the exception trace is good. But we're not psychic. I suggest you include some more detail as to how you got to this point. What is your program doing? Could we reproduce the scenario? Can you make a smaller program that demonstrates the problem? — Travis Griggs, Mar 11 '14 at 19:47
i installed the new device lower than 4.4 and my program function. Thank you for your interest. — Burcak, Mar 11 '14 at 20:31

score 1 · Answer 1 · answered Mar 11 '14 at 19:20

1

The exception states:

Subclasses of PreferenceActivity must override isValidFragment(String) to verify that the Fragment class is valid! com.example.takipci.AyarlarActivity has not checked if fragment com.example.takipci.fragment.GizlilikPreferencesFragment is valid.

In your AyarlarActivity you need to add something like the following:

@Override
protected boolean isValidFragment(String fragmentName) {
    return GizlilikPreferencesFragment.class.getName().equals(fragmentName)
           || super.isValidFragment(fragmentName);
}

answered Mar 11 '14 at 19:20

Bryan Herbst

66,602
10
133
120

code is an excerpt. His program function but my program didn't function. This piece of code doesn't write in his program. What else could be cause of the error ? – Burcak Mar 11 '14 at 19:44
Are you targeting the same SDK version? This was a change in API level 19 (4.4, KitKat) – Bryan Herbst Mar 11 '14 at 19:46
yes my device of version 4.4. AndroidManifest.xml page in this wise :android:minSdkVersion="15" android:targetSdkVersion="19" – Burcak Mar 11 '14 at 19:54
But does the original code also target 4.4? – Bryan Herbst Mar 11 '14 at 19:55

score 0 · Answer 2 · answered Mar 11 '14 at 19:23

0

Try to change your API version to 18 or lower, it seems to be a KitKat security restriction

<uses-sdk android:targetSdkVersion="18" />

answered Mar 11 '14 at 19:23

Alex Lord Mordor

2,890
7
27
47

Thanks a lot of. My program function. I'm so glad :) – Burcak Mar 11 '14 at 20:24
Excelent job... keep trying and just be more specific in your questions, try to give more details, not only the errors. – Alex Lord Mordor Mar 11 '14 at 20:28

My program continuous gives error. Can you help me? I have tried so hard but didn't improve the error

2 Answers2