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[英]Android ListView isnt displaying items despite the ListView and SimpleAdapter having data
[英]ListActivity SimpleAdapter data not displaying properly
當我運行程序時,每一行中的TextView文本都從默認文本更改為空。 HashMaps中的數據未顯示。
我的主應用程序布局(main.xml):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<TextView android:id="@android:id/empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Empty"/>
</LinearLayout>
我的列表項布局(myrow.xml):
<?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="wrap_content"
android:layout_width="fill_parent"/>
<TextView android:id="@+id/item2"
android:text="row_id"
android:layout_height="wrap_content"
android:layout_width="fill_parent"/>
</LinearLayout>
我的應用程序代碼(Test.java):
public class Test extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//main list
ArrayList<HashMap<String, String>> list =
new ArrayList<HashMap<String, String>>();
//data stored in maps and maps added to list
HashMap<String, String> temp = new HashMap<String, String>();
temp.put("Name", "test");
list.add(temp);
HashMap<String, String> temp2 = new HashMap<String, String>();
temp2.put("Name1", "test1");
list.add(temp2);
String[] names = {"item1", "item2"};
int[] locations = {R.id.item1, R.id.item2};
SimpleAdapter adapter = new SimpleAdapter
(this, list, R.layout.myrow, names, locations);
setListAdapter(adapter);
}
}
如果我沒記錯的話,地圖的鍵應該是names
,意思是:
temp.put("Name", "test");
...
String[] names = {"Name", "item2"};
這是全圖
//data stored in maps and maps added to list
HashMap<String, String> temp = new HashMap<String, String>();
temp.put("Name", "test1");//first column
temp.put("Name1", "test1");//second column
list.add(temp);
HashMap<String, String> temp2 = new HashMap<String, String>();
temp2.put("Name", "test2");//first column
temp2.put("Name1", "test2");//second column
list.add(temp2);
String[] names = {"Name", "Name1"};
int[] locations = {R.id.item1, R.id.item2};
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