OnItemLongClicklistner上的ListView - 检索信息(ListView on OnItemLongClicklistener - retrieving information)

 我有一个列表视图，显示数据库中的信息。 我希望能够允许用户长按行项目。 
 
 到目前为止，我可以长按行项目并检索行ID（此部分有效），但我不相信这是我想要的最终结果。 我希望能够检索与行项关联的数据库中的主键; 此信息显示在行项目中。 我似乎无法走得那么远; 我无法弄清楚如何将列表视图中的行ID“连接”回行中的信息（例如主键和其他文本）。 下面是我到目前为止的代码。 
 
DatabaseHandler db = new DatabaseHandler(this);
    SimpleCursorAdapter dataAdapter;

    @Override
    protected void onCreate (Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_main);




        Cursor cursor=db.getAllLocationsCursor();

        String from [] = new String[] {db.COLUMN_DESCRIPTION, db.COLUMN_LOCATION, db.KEY_ID};
        final int to [] = new int[]{R.id.descriptionList, R.id.locationList, R.id.idList};

        dataAdapter = new SimpleCursorAdapter(this, R.layout.row_item, cursor, from, to, 0);


        ListView lv = getListView();
        lv.setAdapter(dataAdapter);


        OnItemLongClickListener listener = new OnItemLongClickListener(){
            @Override
            public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int position, long id){

                Toast.makeText(getApplicationContext(), "Long Clicked " + id, Toast.LENGTH_SHORT).show();
                return false;
            }
        };
        lv.setOnItemLongClickListener(listener);
    }
 
 这是我的行项目xml 
 
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/background"
    android:clickable="true"
    android:focusable="true"
    android:longClickable="true"
    android:onClick="itemClick" >

    <TextView
        android:id="@+id/descriptionList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="@color/mainText" />

    <TextView
        android:id="@+id/locationList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/descriptionList"
        android:lines="2"
        android:text="TextView"
        android:textColor="@color/locationWordsText" />

    <TextView
        android:id="@+id/idList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:alpha="0"
        android:text="TextView" />

</RelativeLayout>
 
 我已经搜索了这个，但我似乎无法找到专门解决这个问题的答案 
 
 这个答案能够让我在正确的轨道上找到解决长按的问题： 无法从光标适配器获取数据 

I have a list view that is displaying information from a database. I want to be able to allow a user to long click on the row item.
 
so far, I can long click on the row item and retrieve the row ID (this part works), however I don't believe this the end result I want. I want to be able to retrieve the primary key in the database that is associated with the row item; this information is being displayed in the row item. I can't seem to get that far; I can't figure out how 'connect' the row id from the list view back to the information in the row (such as the primary key, and other text). Below is the code I have so far.
 
DatabaseHandler db = new DatabaseHandler(this);
    SimpleCursorAdapter dataAdapter;

    @Override
    protected void onCreate (Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_main);




        Cursor cursor=db.getAllLocationsCursor();

        String from [] = new String[] {db.COLUMN_DESCRIPTION, db.COLUMN_LOCATION, db.KEY_ID};
        final int to [] = new int[]{R.id.descriptionList, R.id.locationList, R.id.idList};

        dataAdapter = new SimpleCursorAdapter(this, R.layout.row_item, cursor, from, to, 0);


        ListView lv = getListView();
        lv.setAdapter(dataAdapter);


        OnItemLongClickListener listener = new OnItemLongClickListener(){
            @Override
            public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int position, long id){

                Toast.makeText(getApplicationContext(), "Long Clicked " + id, Toast.LENGTH_SHORT).show();
                return false;
            }
        };
        lv.setOnItemLongClickListener(listener);
    }
 
This is my row item xml
 
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/background"
    android:clickable="true"
    android:focusable="true"
    android:longClickable="true"
    android:onClick="itemClick" >

    <TextView
        android:id="@+id/descriptionList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="@color/mainText" />

    <TextView
        android:id="@+id/locationList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/descriptionList"
        android:lines="2"
        android:text="TextView"
        android:textColor="@color/locationWordsText" />

    <TextView
        android:id="@+id/idList"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:alpha="0"
        android:text="TextView" />

</RelativeLayout>
 
I've searched for this, but I can't seem to find an answer that specifically addresses this
 
This answer was able to get me on the right track as far a addressing the long click: can't getting data from cursor adapter

原文：https://stackoverflow.com/questions/25880436