如何获得项目的位置从popupMenu的一个自定义的ListView [英] How to get the position of an Item from a PopupMenu in a custom ListView
问题描述
下面的问题：我有一个自定义ArrayAdapter（重写getView）。每个项目都得到了
Here's the problem: I've got a custom ArrayAdapter (overriden getView). Each item has got
- 2的ImageView
- 2的EditText
其中的一个ImageView的是可以点击的，使PopupMenu的，所以我有一个小的PopupMenu对列表中的每个项目。现在，该菜单，我需要从项目的一些参数至极锚定。因此，如何通过信息（如位置）从PopupMenu的声音调用的方法？附加的XML文件。
One of those ImageView is clickable and enables a PopupMenu, so I've got a little PopupMenu for each item of the list. Now, for that menu I need some parameters from the item to wich is anchored. So, how to pass informations (like position) to the method called from the PopupMenu voice? Attached the xml files.
item_list.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingBottom="5dp"
android:paddingTop="5dp" >
<ImageView
android:id="@+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="6dip"
android:contentDescription="TODO"
android:src="@drawable/ic_launcher" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/firstLine"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:maxHeight="60dp"
android:text="Title"
android:textSize="16sp" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:contentDescription="TODO"
android:onClick="showMenu"
android:src="@drawable/abc_ic_menu_moreoverflow_normal_holo_light" />
<TextView
android:id="@+id/secondLine"
android:layout_width="fill_parent"
android:layout_height="26dip"
android:layout_alignParentLeft="true"
android:layout_below="@+id/firstLine"
android:ellipsize="marquee"
android:singleLine="true"
android:text="Author"
android:textSize="12sp" />
</RelativeLayout>
</LinearLayout>
menu_item.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/preview"
android:onClick="preview"
android:title="@string/preview"/>
<item
android:id="@+id/download"
android:onClick="download"
android:title="@string/download"/>
</menu>
CustomArrayAdapter.java
public class CustomArrayAdapter extends ArrayAdapter<Custom>{
private final Context context;
private final List<Custom> values;
private final int resource;
private final ImageCache imgCache = new ImageCache();
public CustomArrayAdapter(Context context, int resource, List<Custom> values) {
super(context, resource, values);
this.context = context;
this.values = values;
this.resource = resource;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder vh;
Custom Custom = values.get(position);
if (convertView == null) {
vh = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(resource, parent, false);
vh.title = (TextView) convertView.findViewById(R.id.firstLine);
vh.author = (TextView) convertView.findViewById(R.id.secondLine);
vh.albumImage = (ImageView) convertView.findViewById(R.id.icon);
convertView.setTag(vh);
}
else {
vh = (ViewHolder)convertView.getTag();
}
vh.requestedCustom = Custom;
vh.title.setText(Custom.getTitle());
vh.author.setText(Custom.getAuthor());
String imgUrl = Custom.getImgUrl();
if (imgUrl != null) {
imgCache.getImage(Custom, vh);
}
else {
vh.albumImage.setImageResource(R.drawable.no_album);
}
return convertView;
}
// This is a ViewHolder that helps in the view recycling
public static class ViewHolder {
public Custom requestedCustom;
public TextView title;
public TextView author;
public ImageView albumImage;
}
}
preVIEW和下载的方法需要从相关的列表项的参数，我不知道如何让他们。再次感谢。
"preview" and "download" methods need parameters from the associated list item and I don't know how to get them. Thanks again.
修改1
这似乎应该使用上下文菜单，而不是（对吗？），但我想它锚定到每一个项目作为一种出现弹出菜单。那么，如何实现这一目标？ 对于那些谁不明白我想要什么（由于我最糟糕的英文）：谷歌Play应用，弹出菜单，让你安装或添加到whishlist之间进行选择。
It seems that a Contextual Menu should be used instead (right?) but I would like to anchor it to each item as a sort of popup menu that appears. So how can I achieve this? For those who don't understand what I want (due to my worst english): Google Play app, popup menu that let you choose between "Install" or "Add to whishlist".
推荐答案
您可以创建监听器类是这样的：
You can create your listener class like this:
class myClickListener implements OnClickListener, OnMenuItemClickListener {
long id;
public myClickListener(long id) {
this.id = id;
}
@Override
public void onClick(View v) {
PopupMenu popup = new PopupMenu(appContext, v);
popup.setOnMenuItemClickListener(this);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.menu_item, popup.getMenu());
popup.show();
}
@Override
public boolean onMenuItemClick(MenuItem arg0) {
Toast.makeText(appContext, "ID of selected row : " + id , Toast.LENGTH_SHORT).show();
return false;
}
}
和添加此监听到你的ImageView的适配器类的重写getView方法：
and add this listener to your imageview at your override getView method of adapter class:
imageView.setOnClickListener(new myClickListener(getItemId(position)));
这篇关于如何获得项目的位置从popupMenu的一个自定义的ListView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
