En mi aplicación a veces recibo este error:

 java.lang.IllegalArgumentException: Receiver not registered: android.widget.ViewFlipper$1@4806a4a8   
at android.app.ActivityThread$PackageInfo.forgetReceiverDispatcher(ActivityThread.java:667)
at android.app.ApplicationContext.unregisterReceiver(ApplicationContext.java:840)
at android.content.ContextWrapper.unregisterReceiver(ContextWrapper.java:321)
at android.widget.ViewFlipper.onDetachedFromWindow(ViewFlipper.java:104)
at android.view.View.dispatchDetachedFromWindow(View.java:5891)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1076)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1074)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1074)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1074)
at android.view.ViewRoot.dispatchDetachedFromWindow(ViewRoot.java:1570)
at android.view.ViewRoot.doDie(ViewRoot.java:2565)
at android.view.ViewRoot.die(ViewRoot.java:2535)
at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:218)
at android.view.Window$LocalWindowManager.removeViewImmediate(Window.java:436)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3498)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3599)
at android.app.ActivityThread.access$2300(ActivityThread.java:119)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1867)
 at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4363)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
at dalvik.system.NativeStart.main(Native Method)

¿Qué es esto? ¿Qué tengo que hacer? Necesito ayuda por favor ...

Aquí hay un código:

enonCreate() método Tengo esto:

vf = (ViewFlipper) findViewById(R.id.details);
        vf.setFlipInterval(3000);
        vf.startFlipping();
        populate();

l método de relleno de @where es este:

private void populate() {
        for (int i = 0; i < jArray.length(); i++) {
            System.out.println("lungime" + jArray.length());
            LinearLayout l = new LinearLayout(this);
            l.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
                    LayoutParams.FILL_PARENT));
            l.setBackgroundColor(0x000000);
            l.setOrientation(LinearLayout.VERTICAL);
            vf.addView(l);

            File f = new File(Environment.getExternalStorageDirectory()
                    + "/Downloads/");

            File[] files = f.listFiles();

            Bitmap bitmap = BitmapFactory.decodeFile(files[i].getPath());
            img = new ImageView(this);
            img.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
                    LayoutParams.FILL_PARENT));

            img.setImageBitmap(bitmap);

            System.out.println("target " + target[i]);
            img.setOnTouchListener(this);
            img.setId(i);

            l.addView(img);
            img = null;

        }