Question

这是我的代码部分的主要部分，我在代码的底部做了一些更改，但是当我在listview中选择一个项目时会出现问题..

任何帮助将不胜感激..

我该如何解决这个问题？

public class DisplayWishesActivity extends Activity {
private DatabaseHandler dba;
private ArrayList<MyWish> dbWishes = new ArrayList<>();
private WishAdapter wishAdapter;
 ListView listView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_display_wishes);

    listView = (ListView) findViewById(R.id.list);

    refreshData();
}

private void refreshData() {
    dbWishes.clear();
    dba = new DatabaseHandler(getApplicationContext());

    ArrayList<MyWish> wishesFromDB = dba.getWishes();

    for (int i = 0; i < wishesFromDB.size(); i++){
        String title = wishesFromDB.get(i).getTitle();
        String dateText = wishesFromDB.get(i).getRecordDate();
        String content = wishesFromDB.get(i).getContent();
        int mid = wishesFromDB.get(i).getItemId();

        MyWish myWish = new MyWish();
        myWish.setTitle(title);
        myWish.setContent(content);
        myWish.setRecordDate(dateText);
        myWish.setItemId(mid);
        dbWishes.add(myWish);
    }
    dba.close();

    //setup adapter
    wishAdapter = new WishAdapter(DisplayWishesActivity.this, R.layout.wish_row, dbWishes);
    listView.setAdapter(wishAdapter);

    wishAdapter.notifyDataSetChanged();
}

public class WishAdapter extends ArrayAdapter<MyWish>{
    Activity activity;
    int layoutResource;
    MyWish wish;
    ArrayList<MyWish> mData = new ArrayList<>();

    public WishAdapter(Activity act, int resource, ArrayList<MyWish> data) {
        super(act, resource, data);
        activity = act;
        layoutResource = resource;
        mData = data;
        notifyDataSetChanged();
    }

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

    @Override
    public MyWish getItem(int position) {
        return mData.get(position);
    }

    @Override
    public int getPosition(MyWish item) {
        return super.getPosition(item);
    }

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

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

        View row = convertView;
        ViewHolder holder = null;

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

            LayoutInflater inflater = LayoutInflater.from(activity);

            row = inflater.inflate(layoutResource, null);
            holder = new ViewHolder();

           holder.mTitle = (TextView) row.findViewById(R.id.name);
            holder.mDate = (TextView) row.findViewById(R.id.dateText);

            row.setTag(holder);
        } else {
            holder = (ViewHolder) row.getTag();
        }

        holder.myWish = getItem(position);

        holder.mTitle.setText(holder.myWish.getTitle());
        holder.mDate.setText(holder.myWish.getRecordDate());

        final ViewHolder finalHolder = holder;
       //  int mypos = position;
     //  holder.mTitle.setOnClickListener(new View.OnClickListener() {
         listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
           @Override
           public void onItemClick(AdapterView<?> parent, View view, int position, long id) {


               String text = finalHolder.myWish.getContent().toString();
               String dateText = finalHolder.myWish.getRecordDate().toString();
               String title = finalHolder.myWish.getTitle().toString();

               int mid = finalHolder.myWish.getItemId();

               // Log.v("MyId: " , String.valueOf(mid));
               Intent i = new Intent(DisplayWishesActivity.this, WishDetailActivity.class);
                i.putExtra("content", text);
                i.putExtra("date", dateText);
                i.putExtra("title", title);
                i.putExtra("id", mid);

                startActivity(i);

            }
        });

        return row;

    }

    class ViewHolder{

        MyWish myWish;
        TextView mTitle;
        int mId;
        TextView mContent;
        TextView mDate;
        }
    }
}

Answer 1

从你的适配器类中删除你的itemclicklistener并使用onItemClick中的位置变量来获取该索引处的MyWish对象，然后通过该对象访问getContent，getRecordDate函数

listview中的单击项始终选择索引0处的项

1 个答案: