Question

我的适配器有问题，它只显示de listview上的最后一个元素

呼叫适配器：

public class listrestadp extends BaseAdapter {
// Declare Variables
Context context;
String[] prdesc;
Integer[] cant;
Integer[] comensal;
Integer[] tiempo;
Integer[] idpr;

LayoutInflater inflater;
ArrayList<datoscomanda> lista;

public listrestadp(Context context, String[] prdesc, Integer[] cant, Integer[] comensal, Integer[] tiempo,Integer[] idpr) {
    this.context = context;
    this.prdesc = prdesc;
    this.cant = cant;
    this.comensal = comensal;
    this.tiempo = tiempo;
    this.idpr = idpr;
    lista = new ArrayList<>();
    for (int i = 0; i < prdesc.length; i++) {
        lista.add(new datoscomanda(prdesc[i],cant[i],comensal[i],tiempo[i],idpr[i]));
    }


}

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

@Override
public Object getItem(int position) {
    return position;
}

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

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

    // Declare Variables
    TextView txtprd;
    TextView txtcnt;
    TextView txtcomensal;
    TextView txtiempo;
    Button btnxpr;


            //http://developer.android.com/intl/es/reference/android/view/LayoutInflater.html
    inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    final View itemView = inflater.inflate(R.layout.lay_popup, parent, false);

    // Locate the TextViews in listview_item.xml
    txtprd = (TextView) itemView.findViewById(R.id.txtprd);
    txtcnt = (TextView) itemView.findViewById(R.id.txtcnt);
    txtcomensal = (TextView) itemView.findViewById(R.id.txtcomensal);
    txtiempo = (TextView) itemView.findViewById(R.id.txtiempo);
    btnxpr = (Button) itemView.findViewById(R.id.btndelpr);

    // Capture position and set to the TextViews
    txtprd.setText(lista.get(position).prdesc);
    txtcnt.setText(Integer.toString(lista.get(position).cantidad));
    txtcomensal.setText(Integer.toString(lista.get(position).comensal));
    txtiempo.setText(Integer.toString(lista.get(position).tiempo));
    btnxpr.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            DBhelper dbhelper = new DBhelper(context);
            SQLiteDatabase dbs = dbhelper.getWritableDatabase();
            lista.remove(position);
            dbs.delete(DBhelper.TABLE_COMANDA, DBhelper.KEY_ID+"="+lista.get(position).idpr, null);
            listrestadp.this.notifyDataSetChanged();
        }
    });

    return itemView;
}

}

适配器：

public class listrestadp extends BaseAdapter {
// Declare Variables
Context context;
String[] prdesc;
Integer[] cant;
Integer[] comensal;
Integer[] tiempo;
Integer[] idpr;

LayoutInflater inflater;
ArrayList<datoscomanda> lista;

public listrestadp(Context context, String[] prdesc, Integer[] cant, Integer[] comensal, Integer[] tiempo,Integer[] idpr) {
    this.context = context;
    this.prdesc = prdesc;
    this.cant = cant;
    this.comensal = comensal;
    this.tiempo = tiempo;
    this.idpr = idpr;
    lista = new ArrayList<>();
    for (int i = 0; i < prdesc.length; i++) {
        lista.add(new datoscomanda(prdesc[i],cant[i],comensal[i],tiempo[i],idpr[i]));
    }


}

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

@Override
public Object getItem(int position) {
    return position;
}

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

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

    // Declare Variables
    TextView txtprd;
    TextView txtcnt;
    TextView txtcomensal;
    TextView txtiempo;
    Button btnxpr;


            //http://developer.android.com/intl/es/reference/android/view/LayoutInflater.html
    inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    final View itemView = inflater.inflate(R.layout.lay_popup, parent, false);

    // Locate the TextViews in listview_item.xml
    txtprd = (TextView) itemView.findViewById(R.id.txtprd);
    txtcnt = (TextView) itemView.findViewById(R.id.txtcnt);
    txtcomensal = (TextView) itemView.findViewById(R.id.txtcomensal);
    txtiempo = (TextView) itemView.findViewById(R.id.txtiempo);
    btnxpr = (Button) itemView.findViewById(R.id.btndelpr);

    // Capture position and set to the TextViews
    txtprd.setText(lista.get(position).prdesc);
    txtcnt.setText(Integer.toString(lista.get(position).cantidad));
    txtcomensal.setText(Integer.toString(lista.get(position).comensal));
    txtiempo.setText(Integer.toString(lista.get(position).tiempo));
    btnxpr.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            DBhelper dbhelper = new DBhelper(context);
            SQLiteDatabase dbs = dbhelper.getWritableDatabase();
            lista.remove(position);
            dbs.delete(DBhelper.TABLE_COMANDA, DBhelper.KEY_ID+"="+lista.get(position).idpr, null);
            listrestadp.this.notifyDataSetChanged();
        }
    });

    return itemView;
}

}

我的数据库中有3个条目作为示例：shosho，bosho，gosho，因此我的listview中只有gosho。知道怎么解决这个问题吗？

提前致谢！感谢您的帮助

Answer 1

理论上getItem是：

@Override
public Object getItem(int position) {
    return lista.get(position);
}

尝试更改getItem，然后使用

txtprd.setText(getItem(position).prdesc);

customadapter仅显示最后一个元素

1 个答案: