Android，自定义 ListAdapter 获取 TextView-Text

Android, Custom ListAdapter get TextView-Text

提问by Ripei

I coded an own Adapter and added it to my ListActivity via an ListView. The reason why I wrote an own Adapter is, that i had to make some layout changes to the list-entrys. In every entry of the list i've got 3 TextViews.

我编写了一个自己的适配器并通过 ListView 将它添加到我的 ListActivity。我编写自己的适配器的原因是，我必须对列表条目进行一些布局更改。在列表的每个条目中，我都有 3 个 TextView。

<?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="?android:attr/listPreferredItemHeight"
android:padding="6dip">
<TextView
    android:id="@+id/myNr"
    android:layout_width="40dip"
    android:layout_height="fill_parent"
    android:layout_marginRight="15dip"
    android:text="id" 
    android:textSize="25dip"
    android:background="#333333"
    android:gravity="center_horizontal"/>
<LinearLayout
    android:orientation="vertical"
    android:layout_width="0dip"
    android:layout_weight="1"
    android:layout_height="fill_parent">
    <TextView
        android:id="@+id/editor"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1"
        android:gravity="center_vertical"
        android:text="Editor: " />
    <TextView
        android:id="@+id/date"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1" 
        android:singleLine="true"
        android:ellipsize="marquee"
        android:text="Date: " />
</LinearLayout>

The next thing i did, was to implement a "onListItemClick-Methode". Afterwards i implemented a onListItemLongClick - Listener with the following code:

我做的下一件事是实现“onListItemClick-Methode”。之后，我使用以下代码实现了一个 onListItemLongClick - 侦听器：

in onCreate of the Activity i added:

在我添加的 Activity 的 onCreate 中：

 registerForContextMenu(getListView());

then i added the following methode:

然后我添加了以下方法：

Override
public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo menuInfo){
         AdapterView.AdapterContextMenuInfo info;
         info = (AdapterView.AdapterContextMenuInfo) menuInfo;
            long id = getListAdapter().getItemId(info.position);
        }

where "id" is the index of the item in the list. I now want to get the Text of the texview with the id="myNr of this ListItem. Is there any way get this Text?

其中“id”是列表中项目的索引。我现在想用这个 ListItem 的 id="myNr 来获取 texview 的文本。有什么办法可以得到这个文本？

采纳答案by Ripei

Hey Guys I found another way to set an ItemLongClickListener. Therefore i also found a way to get the Text i am displaying.

嘿伙计们，我找到了另一种设置 ItemLongClickListener 的方法。因此，我还找到了一种获取正在显示的文本的方法。

ListView lv = getListView();
lv.setOnItemLongClickListener(new OnItemLongClickListener(){
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,int row, long arg3) {
   String[] tmp = (String[]) arg0.getItemAtPosition(row);
   //tmp[0] ist the Text of the first TextView displayed by the  clicked ListItem 
   return true;
   }});

回答by dxh

viewis the list item, so you can do

view是列表项，所以你可以做

String s =(String) ((TextView) view.findViewById(R.id.myNr)).getText();

回答by Subhajit banerjee

just take reference of of the text view if you extending a BaseAdapterlike

只取文本视图的参考，如果你伸出的BaseAdapter像

Listener = new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {

TextView tx =(TextView)view.findViewById(R.id.text);
            String s = tx.getText().toString();
            Log.d(TAG, "string : "+s);

回答by Nik NexAndrX

I found none of the above solutions to work. As an alternativeyou can:

我发现上述解决方案都不起作用。作为替代方案，您可以：

getListView().setOnItemLongClickListener(new OnItemLongClickListener() 
{

   public boolean onItemLongClick(AdapterView<?> arg0, View v,int position, long id) 
   {

    Cursor c = (Cursor) arg0.getItemAtPosition(position);
    String tableValue = c.getString(1);

        return true;
   }
});

回答by Malek Hijazi

The best solution I found was :

我发现的最佳解决方案是：

@Override  
        public void onCreateContextMenu(ContextMenu menu, View view,ContextMenuInfo menuInfo) {  
        super.onCreateContextMenu(menu, view, menuInfo);  
        AdapterView.AdapterContextMenuInfo info =     (AdapterView.AdapterContextMenuInfo)menuInfo;

        ViewGroup vg = (ViewGroup) view;
        View children = vg.getChildAt(info.position);
        TextView child = (TextView) children.findViewById(R.id.text1);

        String s= child.getText().toString();
            menu.setHeaderTitle(s);  
            menu.add(0, view.getId(), 0, "Serve");  
            menu.add(0, view.getId(), 0, "View");  

        }  

回答by Eric Mill

If you're looking for the TextView at the position of the item the person long-pressed, you can get it out using something like this:

如果您要在用户长按的项目位置寻找 TextView，您可以使用以下方法将其取出：

String s = ((TextView) view.getItemAtPosition(info.position)).getText();

回答by Ripei

thanks for your help but I am afraid it still doesnt work. if i add the line you suggested, it underlines "getItemAtPosition" and says: --The method getItemAtPosition(int) is undefined for the type View--

感谢您的帮助，但恐怕它仍然不起作用。如果我添加您建议的行，它会在“getItemAtPosition”下划线并说：--对于视图类型，方法 getItemAtPosition(int) 是未定义的--

He suggests to cast the view to a AdapterView, so it looks the following:

他建议将视图转换为 AdapterView，因此它看起来如下所示：

String s = ((TextView) ((AdapterView<ListAdapter>) view).getItemAtPosition(info.position)).getText();

When i run this and make a long click on the item, i recieve an "ClassCastException"

当我运行它并长按该项目时，我收到“ClassCastException”

回答by Ripei

Yes i also thought so. But when i implement this i just get the Text of the first TextView in the List. That means I am able to get the text of the desired TextView but it is always the text of the first list-entry. Isn't there an option to adress the longClickedList-entry?

是的，我也是这么认为的。但是当我实现这个时，我只得到列表中第一个 TextView 的文本。这意味着我能够获取所需 TextView 的文本，但它始终是第一个列表条目的文本。没有解决 longClickedList 条目的选项吗？

回答by Vansi

In this method you will get the item related to your list item.

在此方法中，您将获得与列表项相关的项。

@Override
public boolean onContextItemSelected(MenuItem aItem) {
  AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo) aItem.getMenuInfo();
  Object entity =  (Object) todoList.getAdapter().getItem(menuInfo.position);
  switch (aItem.getItemId()) {}
}

回答by Girish

list.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
            String title = (String) ((TextView)view.findViewById(R.id.title)).getText();
                String  artist=(String)((TextView)view.findViewById(R.id.artist)).getText();

                     //System.out.println(s);
                        Toast.makeText(CustomizedListView.this,"Title = "+title+"\n"+"Artist = "+artist, Toast.LENGTH_SHORT).show();                            

        }
    });