Scrolling ListView causes app to crash

I have a ListView which I'm populating from a SQLite database. I have 350 rows in my ListView on my HTC Hero 2.1 and everything works fine. I installed it on Samsung Galaxy S 2.2 and I have 270 rows in my ListView, and every time when I reach near the bottom of my ListView scrolling the list, my app crashes.

This is the log file:

06-17 14:29:33.796 W/dalvikvm( 3565): threadid=1: thread exiting with uncaught exception (group=0x4001d7d0)
06-17 14:29:33.816 E/AndroidRuntime( 3565): FATAL EXCEPTION: main
06-17 14:29:33.816 E/AndroidRuntime( 3565): java.lang.NullPointerException
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at aec.phonebook.ListContacts$ItemAdapter.getView(ListContacts.java:539)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.widget.AbsListView.obtainView(AbsListView.java:1410)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.widget.ListView.makeAndAddView(ListView.java:1802)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.widget.ListView.fillDown(ListView.java:727)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.widget.ListView.fillGap(ListView.java:698)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.widget.AbsListView.trackMotionScroll(AbsListView.java:3367)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at   android.widget.AbsListView.onTouchEvent(AbsListView.java:2251)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.widget.ListView.onTouchEvent(ListView.java:3605)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.view.View.dispatchTouchEvent(View.java:3819)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:897)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1723)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1129)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.app.Activity.dispatchTouchEvent(Activity.java:2086)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1707)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1810)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.os.Looper.loop(Looper.java:123)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at android.app.ActivityThread.main(ActivityThread.java:4627)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at java.lang.reflect.Method.invokeNative(Native Method)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at java.lang.reflect.Method.invoke(Method.java:521)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
06-17 14:29:33.816 E/AndroidRuntime( 3565):     at dalvik.system.NativeStart.main(Native Method)
06-17 14:29:33.827 W/ActivityManager( 2465):   Force finishing activity aec.phonebook/.ListContacts
06-17 14:29:33.831 I/        ( 2465): dumpmesg > "/data/log/dumpstate_app_error.log"
06-17 14:29:33.855 I/dumpstate( 3830): begin
06-17 14:29:33.890 V/InputDevice( 2465): ID[0]=0(0) Up(1=>0)
06-17 14:29:36.890 W/PowerManagerService( 2465): Timer 0x7->0x3|0x0
06-17 14:29:36.890 I/PowerManagerService( 2465): Ulight 7->3|0
06-17 14:29:36.929 D/VoldCmdLis开发者_如何学编程tener( 2348): asec list
06-17 14:29:36.937 D/VoldCmdListener( 2348): CommandListener::AsecCmd::runCommand -> com.fridgecat.android.atiltlite-1 
06-17 14:29:38.222 I/dumpstate( 3830): done
06-17 14:29:38.370 W/WindowManager( 2465): No window to dispatch pointer action 1
06-17 14:29:38.374 W/ActivityManager( 2465): Activity pause timeout for HistoryRecord{4806e860 aec.phonebook/.ListContacts}

EDIT:

Here is the code:

@Override
public View getView(int position, View convertView, ViewGroup parent){

    View v = convertView;
    if (v == null) {
        LayoutInflater vi = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.row, null);
    }

    Item j = items.get(position);

    if (j != null) {
        TextView tvn = (TextView)v.findViewById(R.id.textViewName);
        TextView tvnum = (TextView)v.findViewById(R.id.textViewNumber);
        TextView tvid = (TextView)v.findViewById(R.id.textViewId);
        TextView tvoper = (TextView)v.findViewById(R.id.textViewOperator);

        if (tvn != null) {
            tvn.setText(j.getname());                           
        }
        if(tvnum != null){
            tvnum.setText(j.getnumber());
        }
        if (tvid != null) {
            tvid.setText(j.getid());                       
        }
        if(tvoper != null){
            tvoper.setText(j.getoperator());

            if(j.getstatus().equals("0")){
                tvoper.setTextColor(Color.WHITE);
            }
            if(j.getstatus().equals("1")){
                tvoper.setTextColor(Color.GREEN);
            }
            if(j.getstatus().equals("2")){
                tvoper.setTextColor(Color.RED);
            }
        }
    }
}

Might be the possible error in your code is "string array size" that you have defined .

for example : The StringArray you created ,has 270 elements but size you have defined maybe more than 270 . that creates problem , of null values in the remaining uninitialised arrays.

So make sure the ArraySize is equal to your ListSize ..

Hope it helps