I am having a ListView with CustomCursorAdapter. The Listview scrolls slowly. Here is the code which I used.
public class CustomCursorAdapter extends CursorAdapter {
private ViewHolder holder=null;
private Activity mContext=null;
private ArrayList<Boolean> mCheckedList=null;
private Button mCancel=null;
private Cursor mCursor = null;
private DatabaseHandler mDbHandler;
private int dStatus;
private LayoutInflater inflater;
public CustomCursorAdapter(Activity context) {
super(context, cursor);
this.mCursor = cursor;
this.mContext = context;
this.mDbHandler = new DatabaseHandler(context);
this.inflater = LayoutInflater.from(context);
}
@Override
public void bindView(View view, Context arg1, Cursor c) {
holder=(ViewHolder) view.getTag();
long duration = c.getLong(c.getColumnIndex(DatabaseHandler.DURATION));
holder.checkToSend.setTag(c.getPosition());
holder.editDitn.setTag(c.getPosition());
holder.pendingLayout.setTag(c.getPosition());
holder.name.setText(c.getString(c.getColumnIndex(DatabaseHandler.NAME)));
holder.worktype.setText(c.getString(c.getColumnIndex(DatabaseHandler.WORKTYPE)));
holder.comment.setText(c.getString(c.getColumnIndex(DatabaseHandler.COMMENT)));
int prio = c.getInt(c.getColumnIndex(DatabaseHandler.PRIORITY));
if(prio == 1)
holder.priority.setVisibility(View.VISIBLE);
else if(prio == 0)
holder.priority.setVisibility(View.INVISIBLE);
boolean check = mCheckedList.get(c.getPosition());
holder.checkToSend.setChecked(check);
onEnableOrDisable(true);
int dictStat = c.getInt(c.getColumnIndex(DatabaseHandler.STATUS));
if(c.getInt(c.getColumnIndex(DatabaseHandler.ISACTIVE))==1 || ((dictStat == 2 || dictStat == 3)&&!DMApplication.isEditMode()))
holder.checkToSend.setVisibility(View.GONE);
else
holder.checkToSend.setVisibility(View.VISIBLE);
switch (dictStat) {
case 1:
holder.status.setText("");
if(DMApplication.isOnEditState()&&DMApplication.getTabPos()==1)
holder.checkToSend.setVisibility(View.GONE);
else
holder.checkToSend.setVisibility(View.VISIBLE);
onEnableOrDisable(true);
break;
case 111:
holder.status.setTextColor(mContext.getResources().getColor(R.color.status_blue));
onEnableOrDisable(false);
holder.status.setText(mContext.getResources().getString(R.string.Property_sending));
break;
case 222:
holder.status.setTextColor(mContext.getResources().getColor(R.color.status_red));
holder.status.setText(mContext.getResources().getString(R.string.Property_Timeout));
onEnableOrDisable(true);
break;
case 333:
holder.status.setTextColor(mContext.getResources().getColor(R.color.status_blue));
holder.status.setText(mContext.getResources().getString(R.string.Property_Retrying));
onEnableOrDisable(false);
break;
case 444:
holder.status.setTextColor(mContext.getResources().getColor(R.color.status_red));
holder.status.setText(mContext.getResources().getString(R.string.Property_Conversion_Failed));
onEnableOrDisable(true);
break;
case 555:
holder.status.setTextColor(mContext.getResources().getColor(R.color.status_blue));
onEnableOrDisable(false);
holder.status.setText(mContext.getResources().getString(R.string.Property_Waiting_Send));
break;
case 20:
holder.status.setTextColor(mContext.getResources().getColor(R.color.status_red));
holder.status.setText(mContext.getResources().getString(R.string.property_sending_failed));
onEnableOrDisable(true);
break;
case 3:
holder.status.setText(mContext.getResources().getString(R.string.Property_Via_Email));
onEnableOrDisable(true);
break;
default:
holder.status.setText("");
onEnableOrDisable(true);
break;
}
int isflashair = c.getInt(c.getColumnIndex(DatabaseHandler.ISFLASHAIR));
String formattedDur = Utilities.getDurationInTimerFormat(duration);
if(isflashair == 0){
holder.imgflash.setVisibility(View.GONE);
holder.editDitn.setVisibility(View.VISIBLE);
holder.pendingLayout.setClickable(true);
if(dictStat == 2 || dictStat == 3){
holder.date.setText(DMApplication.getLocalizedDateAndTime(c.getString(c.getColumnIndex(DatabaseHandler.SENT_DATE)))+" "
+formattedDur);
}else{
holder.date.setText(DMApplication.getLocalizedDateAndTime(c.getString(c.getColumnIndex(DatabaseHandler.REC_END_DATE)))+" "
+formattedDur);
}
}else{
holder.imgflash.setVisibility(View.VISIBLE);
holder.editDitn.setVisibility(View.GONE);
holder.pendingLayout.setClickable(false);
if(dictStat == 2 || dictStat == 3){
holder.date.setText(DMApplication.getLocalizedDateAndTime(c.getString(c.getColumnIndex(DatabaseHandler.SENT_DATE))));
}else{
holder.date.setText(DMApplication.getLocalizedDateAndTime(c.getString(c.getColumnIndex(DatabaseHandler.REC_END_DATE))));
}
}
notifyDataSetChanged();
}
private void onEnableOrDisable(boolean enable)
{
if(DMApplication.getTabPos()==1)
{
if(enable)
{
holder.checkToSend.setEnabled(true);
holder.pendingLayout.setEnabled(true);
holder.editDitn.setEnabled(true);
}
else
{
holder.checkToSend.setVisibility(View.GONE);
holder.checkToSend.setEnabled(false);
holder.pendingLayout.setEnabled(false);
holder.editDitn.setEnabled(false);
}
}
}
@Override
public View newView(Context arg0,final Cursor cursor, ViewGroup parent) {
View retView = inflater.inflate(R.layout.tab_list_layout, parent, false);
holder = new ViewHolder();
holder.name = (TextView) retView.findViewById(R.id.text_tab_list_dictation_name);
holder.worktype = (TextView) retView.findViewById(R.id.text_tab_list_worktype);
holder.comment = (TextView) retView.findViewById(R.id.text_tab_list_comment);
holder.date = (TextView) retView.findViewById(R.id.text_tab_list_dictation_date);
holder.status = (TextView) retView.findViewById(R.id.text_tab_list_dictation_status);
holder.checkToSend = (CheckBox) retView.findViewById(R.id.chkToSend);
holder.priority = (ImageView) retView.findViewById(R.id.img_tab_list_priority);
holder.editDitn = (ImageButton) retView.findViewById(R.id.img_tab_list_edit_dictation);
holder.imgflash = (ImageView) retView.findViewById(R.id.img_is_flashair);
holder.pendingLayout=(RelativeLayout)retView.findViewById(R.id.relativeTabDictateDetails);
holder.pendingLayout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int pos = (Integer) v.getTag();
Cursor c = (Cursor) getItem(pos);
// some code
}
});
holder.checkToSend.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int pos = (Integer) v.getTag();
CheckBox chk = (CheckBox) v;
// some code
}
});
holder.editDitn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int pos = (Integer) v.getTag();
Cursor c = (Cursor) getItem(pos);
// some code
}
});
retView.setTag(holder);
return retView;
}
static class ViewHolder{
TextView name = null;
TextView date = null;
TextView worktype = null;
TextView comment = null;
TextView status = null;
CheckBox checkToSend = null;
ImageView priority = null;
RelativeLayout pendingLayout=null;
ImageButton editDitn = null;
ImageView imgflash = null;
}
}
Please let me know whether anything wrong in my code.
yes you can use the getView in place of newView.as it provides you with a recycled View as a counterview.
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
View retView = convertView;
if (convertView == null) {
retView = inflater.inflate(R.layout.tab_list_layout, parent, false);
holder = new ViewHolder();
holder.name = (TextView) retView.findViewById(R.id.text_tab_list_dictation_name);
holder.worktype = (TextView) retView.findViewById(R.id.text_tab_list_worktype);
holder.comment = (TextView) retView.findViewById(R.id.text_tab_list_comment);
holder.date = (TextView) retView.findViewById(R.id.text_tab_list_dictation_date);
holder.status = (TextView) retView.findViewById(R.id.text_tab_list_dictation_status);
holder.checkToSend = (CheckBox) retView.findViewById(R.id.chkToSend);
holder.priority = (ImageView) retView.findViewById(R.id.img_tab_list_priority);
holder.editDitn = (ImageButton) retView.findViewById(R.id.img_tab_list_edit_dictation);
holder.imgflash = (ImageView) retView.findViewById(R.id.img_is_flashair);
holder.pendingLayout=(RelativeLayout)retView.findViewById(R.id.relativeTabDictateDetails);
holder.pendingLayout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int pos = (Integer) v.getTag();
Cursor c = (Cursor) getItem(pos);
// some code
}
});
holder.checkToSend.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int pos = (Integer) v.getTag();
CheckBox chk = (CheckBox) v;
// some code
}
});
holder.editDitn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int pos = (Integer) v.getTag();
Cursor c = (Cursor) getItem(pos);
// some code
}
});
retView.setTag(holder);
}
else {
holder = (ViewHolder) retView.getTag();
}
return retView ;
}