Android - 在自定义对话框中正确执行自定义列表视

问题描述

我有一个应用程序，我想在 android 的自定义对话框中显示一个由两个 textView 组成的自定义列表视图.到目前为止，我很难弄清楚如何将两者联系起来并生成对话框的内容.

I have an application where I would want to display a custom list view consisting of two textViews inside a custom dialog box in android. So far, I'm having a difficult time figuring out how to connect the two and generate the contents of the dialog box.

我尝试按照自定义 listView 教程进行操作，希望只是将对话框适配器设置为它，但无济于事.

I tried to follow custom listView tutorials with the hopes of just setting the dialog adapter to it but to no avail.

到目前为止，这是我目前所拥有的:

So far, this is what I have so far:

这是 list_row_dialog.xml，包含两个文本视图的行的布局:

This is list_row_dialog.xml, the layout for the row containing two textviews:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:minHeight="50dp"
    android:orientation="horizontal"
    android:padding="5dip" >

<TextView
    android:id="@+id/unit"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textStyle="bold"
    android:typeface="sans" />

<TextView
    android:id="@+id/quantity"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:textColor="#343434"
    android:textSize="12sp" />

</RelativeLayout>

这里是 dialog_main.xml 文件，我希望对话框使用的布局文件，它基本上是一个 listView.

And here is the dialog_main.xml file, the layout file that I want the dialog box to use, it's basically a listView.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

<ListView
    android:id="@+id/custom_list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:dividerHeight="1dp" />

</LinearLayout>

这里是CustomListAdapterDialog.java，我什至不确定是否需要使用它在对话框上显示数据:

And here's CustomListAdapterDialog.java, I'm not sure if I even need to use this to display data on the dialog box:

public class CustomListAdapterDialog extends BaseAdapter {

private ArrayList<ItemClass> listData;

private LayoutInflater layoutInflater;

public CustomListAdapterDialog(Context context, ArrayList<ItemClass> listData) {
    this.listData = listData;
    layoutInflater = LayoutInflater.from(context);
}

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

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

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

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        convertView = layoutInflater.inflate(R.layout.list_row_dialog, null);
        holder = new ViewHolder();
        holder.unitView = (TextView) convertView.findViewById(R.id.unit);
        holder.quantityView = (TextView) convertView.findViewById(R.id.quantity);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.unitView.setText(listData.get(position).getVariant().toString());
    holder.quantityView.setText(listData.get(position).getUnit().toString());

    return convertView;
}

static class ViewHolder {
    TextView unitView;
    TextView quantityView;
}

}

最初，我尝试使用此代码显示对话框:

Initially, I tried this code to display the dialog box:

private void showDialog(){
    final Dialog dialog = new Dialog(this);
    dialog.setContentView(R.layout.dialog_main);


    dialog.show();
}

但它只显示一个空白行，很明显我没有正确填充它.

But it only shows, one blank row, it is very clear that I am not populating it properly.

有什么想法吗?此外，我可以在 showDialog() 函数中填充对话框，因为我在同一个 java 类中也有我想要填充的数据.

Any ideas anyone? Also, I can populate the dialog boxes in the showDialog() function since I also have the data I want to populate with in the same java class.

推荐答案

你在做以下事情吗?您将需要扩充布局文件 dialog_main，找到 ListView，为其设置适配器和 OnItemClickListener.在此之后，您可以使用对话框的 setContentView(View) 方法来获取要显示的列表.

Are you doing the following? You will need to inflate the layout file dialog_main, find the ListView, set an adapter and an OnItemClickListener for it. After this, you can use the dialog's setContentView(View) method to get the list to display.

private void showDialog(){

    final Dialog dialog = new Dialog(this);

    View view = getLayoutInflater().inflate(R.layout.dialog_main, null);

    ListView lv = (ListView) view.findViewById(R.id.custom_list);

    // Change MyActivity.this and myListOfItems to your own values
    CustomListAdapterDialog clad = new CustomListAdapterDialog(MyActivity.this, myListOfItems);

    lv.setAdapter(clad);

    lv.setOnItemClickListener(........);

    dialog.setContentView(view);

    dialog.show();

}

顺便说一句，您的适配器看起来还不错.它不起作用，因为你没有给它任何工作.

By the way, your adapter looks alright. It isn't working because you're not giving it anything to work on.

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