Question

我有一个显示数据库信息的列表视图。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;我无法弄清楚如何连接＆＃39;列表视图中的行id返回行中的信息（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此问题的答案

这个答案能让我走上正确的轨道，直到解决长按： can't getting data from cursor adapter

Answer 1

好吧，我有它的工作。这是我改变的：

 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);

到

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

                TextView test = (TextView) view.findViewById(R.id.descriptionList);

                description_string = test.getText().toString();
                Toast.makeText(getApplicationContext(), "Long Clicked " + description_string, Toast.LENGTH_SHORT).show();
                return false;
            }
        };
        lv.setOnItemLongClickListener(listener);

OnItemLongClicklistener上的ListView - 检索信息

1 个答案: