Nicht instanziieren fragment achten Klasse name vorhanden ist, ist öffentlich und hat einen leeren Konstruktor, der öffentlichen

Ich bin mit dem Fragment, und Wenn ich die änderung der Ausrichtung des Geräts. Wenn zunächst seine Porträt-und wenn ich es ändern auf Querformat, dann mein Absturz der Anwendung. Ich habe den logcat hier. Ich habe schon viele links, aber nicht finden konnte, die richtige Antwort.

Mir bitte helfen, dieses Problem zu lösen.

Dank

public class PageViewActivity extends FragmentActivity {

    private ViewPager viewPager;  
    private NoticePageAdapter noticePageAdapter;
    private TextView titleText;
    private int pageIndex;
    private static int restTime = 0;
    private long lastTime;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
        setContentView(R.layout.activity_page_view);

        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.window_title2);
        titleText = (TextView) findViewById(R.id.title2);
        titleText.setText(R.string.app_name);

        //Create the adapter that will return a fragment for each of the three  
        //primary sections of the app.  
        noticePageAdapter = new NoticePageAdapter(getSupportFragmentManager());

        //Set up the ViewPager with the sections adapter.  
        viewPager = (ViewPager) findViewById(R.id.viewpager);  
        Intent intent = getIntent();
        pageIndex = intent.getIntExtra("notice_position", 0);
        viewPager.setAdapter(noticePageAdapter);
        viewPager.setCurrentItem(pageIndex, true);

        lastTime = System.currentTimeMillis();

        //Check the rest time. If it exceed the 30 sec then finish the activity.
        new CheckTimeThread().start();
    }

    /** 
     * A {@link FragmentPagerAdapter} that returns a fragment corresponding to 
     * one of the sections/tabs/pages. 
     */  
    class NoticePageAdapter extends FragmentPagerAdapter {  

        public NoticePageAdapter(FragmentManager fm) {  
            super(fm);  
        }  

        @Override  
        public Fragment getItem(int position) {  
            Fragment fragment = new NoticeFragment();
            Bundle args = new Bundle();
            args.putInt(NoticeFragment.TEMPLATE_POSITION, position + 1);  
            fragment.setArguments(args);  
            return fragment;
        }  

        @Override  
        public int getCount() {  
            return NoticeData.templateId.length;  
        }  
    }  

    /** 
     * A Notice fragment representing a notices of the app, but that simply 
     * displays notices 
     */  
    public class NoticeFragment extends Fragment { 
        public static final String TEMPLATE_POSITION = "template_position";
        private TextView noticeHeaderTextView;
        private TextView noticeContentTextView;
        private ImageView noticeImageView;

        @Override  
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {  
            int templatePosition = getArguments().getInt(TEMPLATE_POSITION);
            int templateId = 0;
            int tempVar;

            tempVar = templatePosition - 1;
            templateId = Integer.parseInt(NoticeData.templateId[tempVar]);

            int res = R.layout.first_template;

            switch (templateId) {
            case 1:
                res = R.layout.first_template;
                break;
            case 2:
                res = R.layout.second_template;
                break;
            case 3:
                res = R.layout.third_template;
                break;
            case 4:
                res = R.layout.fourth_template;
                break;
            default:
                break;
            }

            View rootView = inflater.inflate(res, container, false);
            noticeHeaderTextView = (TextView)rootView.findViewById(R.id.noticeHeading);
            noticeHeaderTextView.setText(Html.fromHtml(NoticeData.noticeHeading[tempVar]));

            noticeContentTextView = (TextView)rootView.findViewById(R.id.noticeContent);
            noticeContentTextView.setText(Html.fromHtml(NoticeData.noticeContent[tempVar]));

            noticeImageView = (ImageView)rootView.findViewById(R.id.noticeImageView);
            UrlImageViewHelper.setUrlDrawable(noticeImageView, NoticeData.imagesURL[tempVar]);

            DisplayMetrics metrics = getResources().getDisplayMetrics();
            int width = metrics.widthPixels;

            if(templateId == 3) {
                noticeImageView.getLayoutParams().width = width / 2;
            }
            else if(templateId == 2) {
                noticeHeaderTextView.getLayoutParams().width = width/2;
                noticeContentTextView.getLayoutParams().width = width/2;
            }

            RelativeLayout relativeLayout = (RelativeLayout)rootView.findViewById(R.id.relativeLayout);
            relativeLayout.setOnTouchListener(new OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    resetRestTime();
                    return false;
                }
            });

            return rootView;  
        }  
    }
}

Fehler-Trace:

06-24 18:24:36.501: E/AndroidRuntime(11863): FATAL EXCEPTION: main
06-24 18:24:36.501: E/AndroidRuntime(11863): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.noticeboard/com.noticeboard.PageViewActivity}: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.noticeboard.PageViewActivity$NoticeFragment: make sure class name exists, is public, and has an empty constructor that is public
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1970)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3365)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.ActivityThread.access$700(ActivityThread.java:128)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1165)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.os.Looper.loop(Looper.java:137)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.ActivityThread.main(ActivityThread.java:4514)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at java.lang.reflect.Method.invokeNative(Native Method)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at java.lang.reflect.Method.invoke(Method.java:511)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at dalvik.system.NativeStart.main(Native Method)
06-24 18:24:36.501: E/AndroidRuntime(11863): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.noticeboard.PageViewActivity$NoticeFragment: make sure class name exists, is public, and has an empty constructor that is public
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.support.v4.app.Fragment.instantiate(Fragment.java:399)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.support.v4.app.FragmentState.instantiate(Fragment.java:97)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.support.v4.app.FragmentManagerImpl.restoreAllState(FragmentManager.java:1760)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:200)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at com.noticeboard.PageViewActivity.onCreate(PageViewActivity.java:40)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.Activity.performCreate(Activity.java:4465)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1053)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1934)
06-24 18:24:36.501: E/AndroidRuntime(11863):    ... 12 more
06-24 18:24:36.501: E/AndroidRuntime(11863): Caused by: java.lang.InstantiationException: can't instantiate class com.noticeboard.PageViewActivity$NoticeFragment; no empty constructor
06-24 18:24:36.501: E/AndroidRuntime(11863):    at java.lang.Class.newInstanceImpl(Native Method)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at java.lang.Class.newInstance(Class.java:1319)
06-24 18:24:36.501: E/AndroidRuntime(11863):    at android.support.v4.app.Fragment.instantiate(Fragment.java:388)
06-24 18:24:36.501: E/AndroidRuntime(11863):    ... 19 more

InformationsquelleAutor N Sharma | 2013-06-24