Question

如何在默认选择的列表视图中制作项目？我知道在以前的stackoverflow帖子中已经回答了这个问题，但是我不能完全一样地使这项工作生效。我使用了论坛中指定的多种组合，但没有用。

这是我的代码：

        // create the list view
        ListView listView = (ListView) view.findViewById(R.id.list);
        // create adapter
        TimeAdapter adapter = new TimeAdapter(getContext(), stringArray, 3);
        // set adapter to the list view
        listView.setAdapter(adapter);
        listView.setItemChecked(3, true);
        listView.setSelection(3);
        listView.performItemClick(listView.getSelectedView(), 3, 0);

我的XML布局

            <ListView
            android:id="@+id/list"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="0.4"
            android:choiceMode="singleChoice"
            android:listSelector="@color/colorAccent" />

[更新] 我试图根据您在getView中的建议进行修改，但仍然没有帮助:(这次，突出显示了很多行，而不仅仅是一行！

public class TimeAdapter extends ArrayAdapter<String>{

    private Context mContext;
    private ArrayList<String> mArrayString;
    private int mSelection;

    public TimeAdapter(Context context, ArrayList<String> arrayList, int selection) {
        super(context, 0);
        mArrayString = arrayList;
        mContext = context;
        mSelection = selection;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View listItemView = convertView;
        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(
                    R.layout.time_item, parent, false);
        }

        String time = mArrayString.get(position);
        TextView mTimeTextView = listItemView.findViewById(R.id.time_text);
        mTimeTextView.setText(time);

        if (mSelection == position){
            listItemView.setSelected(true);
            listItemView.setBackgroundColor(mContext.
             getColor(R.color.colorAccent));
        }


        return listItemView;
    }

    @Override
    public String getItem(int position) {
        return mArrayString.get(position);
    }

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


}

Answer 1

您可以尝试以下方法：

     // create the list view
     final ListView listView = (ListView) findViewById(R.id.list);
      // create adapter
     final TimeAdapter adapter = new TimeAdapter(this, stringArray, 3);
     // set adapter to the list view
      listView.setAdapter(adapter);
       listView.setSelection(3);
        listView.setItemChecked(3, false);
        listView.performItemClick(listView.getSelectedView(), 3, 0);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(ListViewDemo.this, "position is :"+position, Toast.LENGTH_SHORT).show();
                adapter.setSelection(position);
            }
        });

   public class TimeAdapter extends ArrayAdapter<String> {
        private static final int NOT_SELECTED = -1;
        private Context mContext;
        private ArrayList<String> mArrayString;
        private int mSelection;

        public TimeAdapter(Context context, ArrayList<String> arrayList, int selection) {
            super(context, 0);
            mArrayString = arrayList;
            mContext = context;
            mSelection = selection;
        }


        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            View listItemView = convertView;
            if (listItemView == null) {
                listItemView = LayoutInflater.from(getContext()).inflate(
                        R.layout.list_item, parent, false);
            }

            String time = mArrayString.get(position);
            TextView mTimeTextView = listItemView.findViewById(R.id.text);
            mTimeTextView.setText(time);

         /*   if (mSelection == position) {
                convertView.setSelected(true);
             mTimeTextView.setTextColor(getResources().getColor(R.color.md_amber_800));
               mTimeTextView.setBackground(new ColorDrawable(getResources().getColor(R.color.accent)));
            }*/
            if (position == mSelection) {
                // your color for selected item
                listItemView.setBackgroundColor(getResources().getColor(R.color.primary));
            } else {
                // your color for non-selected item
                listItemView.setBackgroundColor(Color.parseColor("#FFFFFF"));
            }

            return listItemView;
        }

        @Override
        public String getItem(int position) {
            return mArrayString.get(position);
        }

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

        // if called with the same position multiple lines it works as toggle
        public void setSelection(int position) {
            if (mSelection == position) {
                mSelection = NOT_SELECTED;
            } else {
                mSelection = position;
            }
            notifyDataSetChanged();
        }

    }

在默认情况下选择列表视图中的项目

1 个答案: