请尝试以下代码:
public class MainActivity extends ListActivity {
private String[] items;
private List<String> list;
private ArrayAdapter<String> adapter;
private int position;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fillData();
registerForContextMenu(getListView());
}
private void fillData() {
items = new String[] {"Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday", "Sunday"};
list = new ArrayList<String>();
Collections.addAll(list, items);
adapter = new ArrayAdapter<String>(this, R.layout.row,
R.id.r_text, list);
setListAdapter(adapter);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater m = getMenuInflater();
m.inflate(R.menu.our_context_menu, menu);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch(item.getItemId()){
case R.id.delete_item:
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
position = (int) info.id;
list.remove(position);
this.adapter.notifyDataSetChanged();
return true;
}
return super.onContextItemSelected(item);
}
Activity.xml 文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
android:orientation="vertical" >
<ListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
row.xml:
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:textIsSelectable="true"
android:id="@+id/r_text"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dip"
android:textColor="#ffffff"
android:textSize="17sp"/>
现在在
res
文件夹中创建一个名为
menu
的文件夹,并将此文件放入其中。
上下文菜单:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/delete_item"
android:title="@string/delete_string"/>
</menu>