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我是Android開發新手。我正在使用ListView列出來自SQLite數據庫的一些數據。 我的main.xml文件看起來像：LIstView在通過光標填充時顯示無數據
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/inspections"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- Header -->
<LinearLayout android:id="@+id/header"
android:background="#ff347c12"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
>
<TextView android:id="@+id/item1"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:width="100dip"
android:height="30dip"
android:text="Id"
/>
<TextView android:id="@+id/item2"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:text="Customer"
android:width="100dip"
android:height="30dip"
/>
<TextView android:id="@+id/item3"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:text="Contract"
android:width="100dip"
android:height="30dip"
/>
<TextView android:id="@+id/item4"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:text="Inspector"
android:width="100dip"
android:height="30dip"
/>
</LinearLayout>
<!-- List Divider -->
<View android:layout_width="fill_parent"
android:layout_height="1dip"
android:background="?android:attr/listDivider" />
<!-- ListView (grid_items) -->
<LinearLayout android:id="@+id/layout"
android:layout_width="wrap_content"
android:layout_height="fill_parent">
<ListView android:id="@+id/listview"
android:layout_height="fill_parent"
android:layout_width="fill_parent">
</ListView>
</LinearLayout>
</LinearLayout>
我使用的是用來保存每行的數據grid_item.xml，它看起來像：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/item1"
android:text="row_id"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:width="20dip"
/>
<TextView android:id="@+id/item2"
android:text="col_1"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:width="100dip"
/>
<TextView android:id="@+id/item3"
android:text="col_2"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:width="100dip"
/>
<TextView android:id="@+id/item4"
android:text="col_3"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:width="100dip"
/> </LinearLayout>
代碼：
public class Inspections extends Activity{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
try
{
super.onCreate(savedInstanceState);
setContentView(R.layout.inspections);
LoadInspections();
}
catch (Exception e) {
CommonMethods.ShowMessageBox(this, e.toString());
}
}
private void LoadInspections()
{
try
{
DBAdapter db = new DBAdapter(this);
db.open();
Cursor cur = db.GetInspections();
if(cur.moveToFirst())
{
startManagingCursor(cur);
ListView lv = (ListView)findViewById(R.id.listview);
// create the grid item mapping
String[] from = new String[] {"_id", "customer", "contract", "inspector"};
int[] to = new int[] {R.id.item1, R.id.item2, R.id.item3, R.id.item4 };
// fill in the grid_item layout
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.grid_item, cur, from, to);
lv.setAdapter(adapter);
Log.d("Inspection", "Records found " + cur.getString(1) + "/ "+ cur.getString(2)+ "/ "+ cur.getString(3));
}
else
{
Log.d("Inspection", "No reords");
}
db.close();
}
catch(Exception ex)
{
Log.d("Inspection", "Error: "+ ex.toString());
}
}
}
問題： LoadInspections（）有問題，列表視圖不顯示任何數據，只顯示HEADER-ROW。光標正在檢索數據，請檢查以下行：
Log.d("Inspection", "Records found " + cur.getString(1) + "/ "+ cur.getString(2)+ "/ "+ cur.getString(3));
日誌窗口正在顯示數據。
我盡了最大努力在stackoverflow上找到答案，但無法成功。 在此先感謝您寶貴的時間&幫助。