复杂的自定义ListView

Question

我在Buttons中有四 MainActivity，我想将用户转移到第二个Activity ListView，但是我想对每个Button进行编码，以便将不同的元素转移到ListView。问题是，如果我使用自定义ListView适配器或什么????来代码此ListView

Answer 1

假设您的列表项中有一个文本视图和两个按钮，那么您的自定义适配器将如下所示。 在firstButton上单击打开第一个活动，在第二个活动上打开第二个活动。

    public class CustomAdapter extends ArrayAdapter<DataModel>  {

        private ArrayList<DataModel> dataSet;
        Context mContext;

        // View lookup cache
        private static class ViewHolder {
            TextView txtName;
            Button   firstButton,secondButton;

        }

        public CustomAdapter(ArrayList<DataModel> data, Context context) {
            super(context, R.layout.row_item, data);
            this.dataSet = data;
            this.mContext=context;

        }


        private int lastPosition = -1;

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // Get the data item for this position
            DataModel dataModel = getItem(position);
            // Check if an existing view is being reused, otherwise inflate the view
            ViewHolder viewHolder; // view lookup cache stored in tag

            final View result;

            if (convertView == null) {

                viewHolder = new ViewHolder();
                LayoutInflater inflater = LayoutInflater.from(getContext());
                convertView = inflater.inflate(R.layout.row_item, parent, false);
                viewHolder.txtName = (TextView) convertView.findViewById(R.id.name);
                viewHolder.firstButton = (Button) convertView.findViewById(R.id.first_button);
                viewHolder.secondButton = (Button) convertView.findViewById(R.id.second_button);     
                result=convertView;

                convertView.setTag(viewHolder);
            } else {
                viewHolder = (ViewHolder) convertView.getTag();
                result=convertView;
            }


            lastPosition = position;

            viewHolder.txtName.setText(dataModel.getName());


            viewHolder.secondButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // do something when the corky is clicked
                open second activity
}
        });
            viewHolder.firstButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // do something when the corky is clicked
                open first activity
}
        });
            // Return the completed view to render on screen
            return convertView;
        }
    }

Answer 2

这是我编写的最后一个listAdapter但仍然有第99行的错误是whis.mTitle.setText（titles [j] [k]）;

整个代码

    public class ListAdapter extends ArrayAdapter<Data> {

    private int layoutResource ;
    private Activity activity;
    private ArrayList<Data> dataList = new ArrayList<>();
    Context context;

    public ListAdapter(Activity act , int resource , ArrayList<Data> data){
        super(act ,resource,data);
        layoutResource = resource;
        activity = act;
        dataList = data;
        notifyDataSetChanged();

    }

    @Override
    public int getCount() {
        return dataList.size();
    }

    @Nullable
    @Override
    public Data getItem(int position) {
        return dataList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;

    }

    @Override
    public View getView(final int position, final View convertView, ViewGroup viewGroup) {
        int buttonPosition,titlePosition;
        View row= convertView;
        ViewHolder holder = null;

       if ( row == null || (row.getTag()) ==null){

            LayoutInflater inflater = LayoutInflater.from(activity);
            row= inflater.inflate(R.layout.list_row,viewGroup,false);
            holder = new ViewHolder();
            holder.mTitle = (TextView) row.findViewById(R.id.txtTitle);
            holder.mContent =(TextView)row.findViewById(R.id.txtContent);
            row.setTag(holder);
        }else{holder=(ViewHolder)row.getTag();
        }

int [] buttonsName = {R.id.btnAchieveYourLifeGoals，R.id.btnBecomeMoreOptimistic，R.id.btnBecomeWealthyAndSuccess，R.id.btnReduceStress，R.id.btnLeadership};在此输入代码

                   int [][]titles ={{R.string.createList1, R.string.cleanEnvironment1, R.string.avoidDistractions1, R.string.earlyMorning1
                , R.string.useWeekends1, R.string.neverProcrastinate1, R.string.findSupport1, R.string.beFutureOne1, R.string.checkProgress1,
                R.string.motivateYourself1},{R.string.treatPeopleWell1, R.string.neverWasteTimeToChangethingsYouCannotChange1,
                R.string.expectSomethingBeautiful1, R.string.assumeTheBestOnPeople1, R.string.focusOnTasks1,
                R.string.avoidDepressingPeople1, R.string.eatClean1, R.string.avoidTVNews1,
                R.string.theBestisnotCome1, R.string.findThingsTobeGrateful1}, {R.string.focusOnEarning1, R.string.stopExchangingTimeAgainstMoney1, R.string.dontPursueSomeoneDream1
                , R.string.stepOutYourComfortZone1, R.string.haveGoalsForAlllife1, R.string.findMindedPeople1, R.string.saveFirst1,
                R.string.putYourMoneyToWork1, R.string.neverBuyThingsYouCannotAfford1, R.string.believeThatYouWillBeRich1},
                {R.string.spenLessTimeWithNegativePeople1, R.string.avoidPeopleWhoCannotControlStress1,
                        R.string.findQuietPlaces1, R.string.workingManyProjectsIncreasesStress1, R.string.stopWatchingNewsOnTV1,
                        R.string.acceptProjectsThatYouEnjoy1, R.string.noMultitasking1, R.string.noScreenTime1, R.string.meditation1
                        , R.string.physicalActivities1},{R.string.visionary1, R.string.strategicActing1, R.string.goalDriven1,
                R.string.selfManagement1, R.string.teamBuilding1, R.string.communication1, R.string.accountability1,
                R.string.prblemSolver1, R.string.creativity1, R.string.agility1}};

          for (int j =0;j<buttonsName.length;j++) {
              for (int k = 0;k<titles.length; k++){
                  holder.mTitle.setText(titles[j][k]);

          }
          }
        row.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent(context,Details.class);
                i.putExtra("Title" ,dataList.get(position).getTitle());
                i.putExtra("Content",dataList.get(position).getContent());
                context.startActivity(i);
            }
        });
        return row;
    }




 class ViewHolder{
       TextView mTitle;
        TextView mContent;
        Data myData;
 }


}