android - ListView的itemclick事件上的NullpointerException

protected void onResume(){
        listTimer = (ListView) findViewById(R.id.listTimer);
        fetchData();
        tadapt = new TimerAdapter(RoutineList, this);
        listTimer.setAdapter(tadapt);
        listTimer.performItemClick(v1, 0, listval);
        super.onResume();
    }

listTimer.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                    long arg3) {
                // TODO Auto-generated method stub


                v1 = arg0;
                pos = arg2;
                listval = arg3;
                View v = arg0.getChildAt(arg2);
                TextView tvM = (TextView) v.findViewById(R.id.tvETimer);
}

注意：视图上有nullpointerexception。

最佳答案

视图已经在变量arg1中。不需要再给另一个变量赋值。
试试这个…

listTimer.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            // TODO Auto-generated method stub

            v1 = arg0;
            pos = arg2;
            listval = arg3;
            TextView tvM = (TextView) arg1.findViewById(R.id.tvETimer);
}