Custom GridView/ListView Data Source

During development, we often encounter complicated layout of the GridView/ListView. The re-implementation of BaseAdapter not only helps us achieve the layout we want, in addition, when binding a large amount of data, it does not feel stuck. Remember to use a ListView to directly bind the contact Cursor in the mobile phone (more than one hundred people), sliding will feel stuck. I decided to write a Demo today because the project may achieve this effect:Bind four ImageButton to a GridView. Some buttons are unavailable under certain circumstances, that is, Enable = false. Different buttons must have different click events..

First, add a flag boolean bl to control the Enable status of the button. Second, add View. onClickListener to the List.

1. MyAdapter. java inherits from BaseAdapter

Public ClassMyAdapterExtendsBaseAdapter {
    
    PrivateContext context;
    PrivateList<Map<String, Object>List;
    PrivateLayoutInflater mInflater;
    PublicMyAdapter (Context context, List<Map<String, Object>List ){
        This. Context=Context;
        This. List=List;
MInflater=LayoutInflater. from (This. Context );
}
    Public IntGetCount (){
        //TODO Auto-generated method stub
        If(List! =Null)
            ReturnList. size ();
        Else
            Return 0;
}

    PublicObject getItem (IntPosition ){
        //TODO Auto-generated method stub
        If(List! =Null)
            ReturnList. get (position );
        Else
            Return Null;
}

    Public LongGetItemId (IntPosition ){
        //TODO Auto-generated method stub
        ReturnPosition;
}

@ SuppressWarnings ("Unused")
    PublicView getView (IntPosition, View convertView, ViewGroup parent ){
        //TODO Auto-generated method stub
ViewHolder holder=Null;
        If(Holder=Null){
Holder=NewViewHolder ();
ConvertView=MInflater. inflate (R. layout. gridview_item,Null);
Holder. ib=(ImageButton) convertView. findViewById (R. id. ib );
ConvertView. setTag (holder );
}Else{
Holder=(ViewHolder) convertView. getTag ();
}
        //Bind a click event
Holder. ib. setOnClickListener (OnClickListener) list. get (position). get ("Listen"));
        //Enable with flag control button
        If(Boolean. parseBoolean (list. get (position). get ("Bl"). ToString ()))
Holder. ib. setEnabled (True);
        Else
H