Android ListView summary

1. Specify item can not click event

IsEnabled Adapter override the method:

@Override
    public boolean isEnabled(int position) {
        if(position == 4) {
            return false;
        }
        return super.isEnabled(position);
    }

postion == 4, can not click, that is, no animation.

2. Item of interior layout and the like if a response is required CheckBox

Item layout needs need to add android: descendantFocusability = "blocksDescendants" this attribute, sub-view events can respond.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:descendantFocusability="blocksDescendants"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:minHeight="60dp">
    <CheckBox
        android:id="@+id/task_complete"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

...

3. ListView classification display

Mainly in return a different view in getview time depending on the position.

public class TaskListAdapter extends BaseAdapter {

    private Context mContext;
    private List<String> mTaskList;
    private List<String> mTaskList2;

    public TaskListAdapter() {
        super();
    }

    public TaskListAdapter(Context context, List<String> data,List<String> data2) {
        mContext = context;
        mTaskList = data;
        mTaskList2 = data2;
    }

    @Override
    public int getCount() {
        return mTaskList.size() + 1 + mTaskList2.size();
    }

    @Override
    public Object getItem(int position) {
        if(position == mTaskList.size())
            return null;
        if(position < mTaskList.size()) {
            return mTaskList.get(position);
        } else {
            return mTaskList2.get(position - mTaskList.size() -1);
        }
    }

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

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder = null;
        LayoutInflater layoutInflater = LayoutInflater.from(mContext);
        //if(position == mTaskList.size()) {
        //    convertView = layoutInflater.inflate(R.layout.item_task_separator, null);
        //}
        //if(convertView == null) {
            viewHolder = new ViewHolder();

            if(position == mTaskList.size()) {
                convertView = layoutInflater.inflate(R.layout.item_task_separator, null);
            } else {
                convertView = layoutInflater.inflate(R.layout.item_task_layout, null);
                viewHolder.title = (TextView) convertView.findViewById(R.id.task_title);
                viewHolder.desc = (TextView) convertView.findViewById(R.id.task_desc);
                viewHolder.due_date = (TextView) convertView.findViewById(R.id.task_due_date);
                viewHolder.due_time = (TextView) convertView.findViewById(R.id.task_due_time);
                viewHolder.complete = (CheckBox) convertView.findViewById(R.id.task_complete);
                if(true) {
                    viewHolder.select = (CheckBox) convertView.findViewById(R.id.task_select);
                    viewHolder.select.setVisibility(View.VISIBLE);
                }
                convertView.setTag(viewHolder);
            }
        //} else if(position != mTaskList.size()){
        //    viewHolder = (ViewHolder) convertView.getTag();
        //}


        if(position != mTaskList.size()) {
            String taskItem = (String) getItem(position);

            viewHolder.title.setText(taskItem);
            //viewHolder.desc.setText(taskItem.desc);
            Calendar calendar = Calendar.getInstance();
            //calendar.setTimeInMillis(taskItem.due_date);
            String formatDate = "MMM dd";
            if(Locale.CHINA.getCountry().equals(Locale.getDefault().getCountry())) {
                formatDate = "MM月dd日";
            }
            SimpleDateFormat format = new SimpleDateFormat(formatDate, Locale.getDefault());
            Log.d("zhouyong", "calendar = " + calendar.toString());
            Log.d("zhouyong","display name = "+Locale.getDefault().getCountry() + " "+Locale.CHINA.getCountry());
            viewHolder.due_date.setText(format.format(calendar.getTime()));

            format = new SimpleDateFormat("a hh:mm", Locale.getDefault());
            viewHolder.due_time.setText(format.format(calendar.getTime()));
            //viewHolder.complete.setChecked(taskItem.complete == 1 ? true : false);

            viewHolder.complete.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Log.d("zhouyong", "complete = " + ((CheckBox) v).isChecked());
                }
            });
        }
        return convertView;
    }

    private class ViewHolder {
        TextView title;
        TextView desc;
        TextView due_date;
        TextView due_time;
        CheckBox complete;
        CheckBox select;
    }
}

4. ListView default display in what position

mListView.setSelection(position); 

listview.post(new Runnable() {
  @Override
  public void run() {
    listview.smoothScrollToPosition(position);
  }
});

After setting the value of the adapter calls, or adapter.notifyDataSetChanged () after the call. smoothScrollToPosition animation effects.

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