Question

我在列表视图的每个列表项中都有一个按钮。在该按钮单击事件中，我有一些代码要运行。在单击事件中，在代码运行之前显示进度对话框。但它没有显示出来。在点击事件中的所有代码完成后，将显示结束进度对话框。 Plz帮助我。

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity1);

    TheListViewM = (ListView) findViewById(R.id.lvItems);
    ImageAdapter anImageAdapterM =new ImageAdapter(this);
    TheListViewM.setAdapter(anImageAdapterM);

}


public class ImageAdapter extends BaseAdapter {
    private Context mContextL;

    public ImageAdapter(Context contextP) {
        mContextL = contextP;
    }

    public int getCount() {
        return ItemList.GetLength();
    }

    public Object getItem(int PositionP) {
        return ItemList.GetObject(PositionP);
    }

    public long getItemId(int PositionP) {
        return PositionP;
    }

    public View getView(final int PositionP, View ConvertViewP, ViewGroup ParentP) {



        if (ConvertViewP == null) {
            LayoutInflater inflater = (LayoutInflater) mContextL.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            ConvertViewP = inflater.inflate(R.layout.add_cart_row_layout, ParentP, false);
        }
        TextView textView1 = (TextView) ConvertViewP.findViewById(R.id.tvName);
        textView1.setText("asdfg");
        final Spinner spQuantity = (Spinner) ConvertViewP.findViewById(R.id.spQuantity);

        spQuantity.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> Parent, View view,
                    int pos, long id) {


                    ProgressDialog aProgressDialogL = new ProgressDialog(mContextL);
                    aProgressDialogL.setMessage("Loading...");
                    aProgressDialogL.show();

                    //Processiing codes
                }

            }
            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
                // TODO Auto-generated method stub
            }
        });
        ArrayAdapter<String> QuantityAdapter1 = new ArrayAdapter<String>(mContextL,android.R.layout.simple_spinner_item, QuantityList);

        QuantityAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spQuantity.setAdapter(QuantityAdapter1);

        Button btn1 = (Button) ConvertViewP.findViewById(R.id.btn1);
                    btn1.setOnClickListener(new View.OnClickListener() {
                        public void onClick(View v) {

                            ProgressDialog aProgressDialogL = new ProgressDialog(activity1.this);

                            aProgressDialogL.setMessage("Loading...");
                            aProgressDialogL.show();        }
                    });

                    return ConvertViewP;
    }

Answer 1

试试这个。

public class ImageAdapter extends BaseAdapter {
private Context mContextL;

public ImageAdapter(Context contextP) {
    mContextL = contextP;
}

public int getCount() {
    return ItemList.GetLength();
}

public Object getItem(int PositionP) {
    return ItemList.GetObject(PositionP);
}

public long getItemId(int PositionP) {
    return PositionP;
}

class ViewHolder {
    Button btn1;
    TextView textView1;
    Spinner spQuantity;
}

public View getView(final int PositionP, View ConvertViewP, ViewGroup ParentP) {

    ViewHolder holder;

    if (ConvertViewP == null) {

        holder = new ViewHolder();
        LayoutInflater inflater = (LayoutInflater) mContextL.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        ConvertViewP = inflater.inflate(R.layout.add_cart_row_layout, ParentP, false);
        holder.textView1 = (TextView) ConvertViewP.findViewById(R.id.tvName);
        holder.spQuantity = (Spinner) ConvertViewP.findViewById(R.id.spQuantity);
        holder.btn1 = (Button) ConvertViewP.findViewById(R.id.btn1);

        ConvertViewP.setTag(holder);
    }
    else{
        holder = (ViewHolder) ConvertViewP.getTag();
    }
    holder.textView1.setText("asdfg");

    holder.spQuantity.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> Parent, View view,
                int pos, long id) {


                ProgressDialog aProgressDialogL = new ProgressDialog(mContextL);
                aProgressDialogL.setMessage("Loading...");
                aProgressDialogL.show();

                //Processiing codes

        }
        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub
        }
    });

    ArrayAdapter<String> QuantityAdapter1 = new ArrayAdapter<String>(mContextL,android.R.layout.simple_spinner_item, QuantityList);

    QuantityAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    holder.spQuantity.setAdapter(QuantityAdapter1);


               holder.btn1.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {

                        ProgressDialog aProgressDialogL = new ProgressDialog(activity1.this);

                        aProgressDialogL.setMessage("Loading...");
                        aProgressDialogL.show();        }
                });

                return ConvertViewP;
}
}

列表视图中的按钮单击事件中未显示进度对话框

1 个答案: