CursorAdapter

class CallLogAdapter extends CursorAdapter {        private ViewItemHolder mHolder;        private Context mContext;        public CallLogAdapter(Context context, Cursor c, int flags) {            super(context, c, flags);            this.mContext = context;        }                final class ViewItemHolder {            TextView callDate;            TextView callTime;            ImageView callType;            TextView duration;        }        @Override        public View newView(Context context, Cursor cursor, ViewGroup parent) {            final LayoutInflater inflater = LayoutInflater.from(context);            View view = inflater.inflate(R.layout.mediaphone_simple_callog_list_item, parent, false);            createChildViews(view, cursor);            return view;        }        @Override        public void bindView(View view, Context context, Cursor cursor) {            createChildViews(view, cursor);        }                private void createChildViews(View view, Cursor cursor) {            mHolder = (ViewItemHolder) view.getTag();            if(mHolder == null){                mHolder = new ViewItemHolder();                mHolder.callDate = (TextView) view.findViewById(R.id.tv_call_date);                mHolder.callTime = (TextView) view.findViewById(R.id.tv_call_time);                mHolder.callType = (ImageView) view.findViewById(R.id.iv_call_type);                mHolder.duration = (TextView) view.findViewById(R.id.tv_call_duration);            }                        long datetime = cursor.getLong(SipCallLogs.FULL_COLUMN_INDEX_DATE);            Calendar cal = Calendar.getInstance();            cal.setTimeInMillis(datetime);            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy年MM月dd日");            SimpleDateFormat timeFormat = new SimpleDateFormat("HH:mm:ss");            String dateStr = dateFormat.format(cal.getTime());            String timeStr = timeFormat.format(cal.getTime());                        mHolder.callDate.setText(dateStr);            mHolder.callTime.setText(timeStr);            int callType = cursor.getInt(SipCallLogs.FULL_COLUMN_INDEX_TYPE);            Drawable callTypeImg = null;            if (Calls.INCOMING_TYPE == callType) {                callTypeImg = mContext.getResources().getDrawable(R.drawable.ic_call_type_income);            } else if (Calls.OUTGOING_TYPE == callType) {                callTypeImg = mContext.getResources().getDrawable(R.drawable.ic_call_type_outgo);            } else if (Calls.MISSED_TYPE == callType) {                callTypeImg = mContext.getResources().getDrawable(R.drawable.ic_call_type_income_miss);            }            mHolder.callType.setImageDrawable(callTypeImg);            mHolder.duration.setText(formatDuration(cursor.getLong(SipCallLogs.FULL_COLUMN_INDEX_DURATION)));            view.setTag(mHolder);        }                private String formatDuration(long elapsedSeconds) {            long minutes = 0;            long seconds = 0;            if (elapsedSeconds >= 60) {                minutes = elapsedSeconds / 60;                elapsedSeconds -= minutes * 60;            }            seconds = elapsedSeconds;            return mContext.getString(R.string.callDetailsDurationFormat, minutes, seconds);        }    }