Question

I am a very green android developer and need some help with a strange program crash. Often the program will run just fine. There is an equal chance it will fail (see stack at the end). I can watch the program run through the getView function and everything seems in order (i.e. all the information is there as expected and passes through convertView seemingly fine). Either it will go through a few times and then program will be A-OK or it will fail as seen below and I have not been able to pick out what causes the crash. Even stranger is that if I hold the phone in landscape mode, it will never fail!! It only fails about 50% of the time in portrait orientation. Can someone please help me?

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

        View v = convertView;
        if (v == null) {
            LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(R.layout.row, null);
        }
        ADDPResults addpres = items.get(position);
        if (addpres != null) {
                //initialize display variables from inflated row.xml variables
                TextView iptext = (TextView) v.findViewById(R.id.IPtext);
                TextView mactext = (TextView) v.findViewById(R.id.MACtext);
                TextView nametext = (TextView) v.findViewById(R.id.Nametext);
                TextView devicetext = (TextView) v.findViewById(R.id.Devicetext);
                //TextView firmwaretext = (TextView) v.findViewById(R.id.Firmwaretext);
                //write the real data to the display
                iptext.setText("IP Address:     "+addpres.addp_deviceIP.toDecString()); 
                mactext.setText("MAC Address: "+addpres.addp_deviceMAC.toHexString() );
                nametext.setText("Name:             "+addpres.addp_devName);
                devicetext.setText("Device:           "+addpres.addp_devType);       
                //firmwaretext.setText("Firmware:       "+addpres.addp_FWVersion);
        }
        return v;
    }
}

———————–Failure———————————————-
Thread [<3> main] (Suspended (exception ArrayIndexOutOfBoundsException))
ListView.layoutChildren() line: 1686
ListView(AbsListView).onLayout(boolean, int, int, int, int) line: 1224
ListView(View).layout(int, int, int, int) line: 6886
LinearLayout.setChildFrame(View, int, int, int, int) line: 1119
LinearLayout.layoutVertical() line: 998
LinearLayout.onLayout(boolean, int, int, int, int) line: 918
LinearLayout(View).layout(int, int, int, int) line: 6886
FrameLayout.onLayout(boolean, int, int, int, int) line: 333
FrameLayout(View).layout(int, int, int, int) line: 6886
LinearLayout.setChildFrame(View, int, int, int, int) line: 1119
LinearLayout.layoutVertical() line: 998
LinearLayout.onLayout(boolean, int, int, int, int) line: 918
LinearLayout(View).layout(int, int, int, int) line: 6886
PhoneWindow$DecorView(FrameLayout).onLayout(boolean, int, int, int, int) line: 333
PhoneWindow$DecorView(View).layout(int, int, int, int) line: 6886
ViewRoot.performTraversals() line: 996
ViewRoot.handleMessage(Message) line: 1633
ViewRoot(Handler).dispatchMessage(Message) line: 99
Looper.loop() line: 123
ActivityThread.main(String[]) line: 4363
Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method]
Method.invoke(Object, Object…) line: 521
ZygoteInit$MethodAndArgsCaller.run() line: 862
ZygoteInit.main(String[]) line: 620
NativeStart.main(String[]) line: not available [native method]

Answer 1

I would check what you get as ‘position’ and compare that to the size of your items array… since the exception says : ArrayIndexOutOfBoundsException